Tight Gas Project Experience

Around the world, no two tight gas plays are exactly alike. 
When it comes to solving the many—and complex—challenges posed by tight gas, only Halliburton can supply the optimal solution: from formation evaluation and imaging challenges to those posed by assessment, horizontal drilling, stimulation and produced water handling. And last but not least, by our expertise in HSE (health, safety and environment) issues and regulations.

Halliburton's Tight Gas Project History

Halliburton's Tight Gas Project History

TG Case Studies

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Summary Summary Carbonate 20/20SM Acidizing Service Eliminates Need for Proppant, Adds More Than $1.5 Million in Value
After being shot; a 16;000 foot well in a Cotton Valley Formation was still only flowing at 8.2 mmcfpd at 1;680 psi FTP with a positive skin. To increase production; the operator wanted to fracture the well with proppant but had not previously pumped into it.
Summary Summary ZCA Acid System and Carbonate 20/20 Service (SM) Increase Oil Production by over $233;000 (Case History)
An operator had drilled a 9;746 foot well and was considering its ASL limestone formation as a potential zone. However; after it went into production; the well barely produced at a measurable rate; and most of that production was water with traces of oil.
Summary Summary SurgiFracSM Service Used to Stimulate Open-Hole Lateral Adds More Than $927;000 in Value in Just Six Months (New Mexico)
A 2;000-ft open-hole lateral had been drilled in a 4;600-ft Yeso formation well�in a mature�field that the operator believed was depleted. After the lateral was cleaned out and an acid wash hadbeen performed; the well still failed to produce oil. To revive the well; the operator asked Halliburton for an effective method to stimulate the entire lateral and connect it to the formation's natural fracture system.
Summary Summary HydroChek® Service Restores 5;000 BPD of Oil Production; Adds $35 Million in Value (Case History)
A 2;700 foot well in a Cretacio Inferior Formation had to be shut in after just one-and-a-half years because of excessive water production.   
Summary Summary Clay/Mineralogy (Multimedia)
StiMRIL services uses MRIL magnetic resonance imaging logging technology to determine which zones have clays present and which are clay free. This determines the type of completion fluid that should be selected to optimize production and reduce clay swelling.
Summary Summary AquaStim Service RedTech Audio File
Advanced Technologies Focused on Improving Production from Unconventional Reservoirs Halliburton’s new AquaStim water frac service technologies are already helping operators achieve better fracturing results: • Improved production. • Improved load recovery. • Minimized sand and formation material flowback. • Reduced fracture face damage.
Summary Summary AquaStim Water Frac Service Video
AquaStim video describes AquaStim service covering GasPerm 1000, FR-56, SandWedge, and OptiKleen-WF along with case histories.
Summary Summary AquaStimSM Water Frac Service
Advanced Technologies Focused on Improving Production from Unconventional Reservoirs
Summary Summary CobraMax Fracturing Service
Provides the Performance of Conventional Through Tubing Fracturing with the Speed and Versatility of Coiled Tubing Operations. New CobraMax service enables more efficient performance than ever before possible for fracturing multiinterval vertical wells.
Summary Summary DFIT Analysis Service
Challenge: How to determine pore pressure and permeability critical fracture design parameters in a well containing 26 zones when pressure-buildup tests are impractical and wireline formation testers have proved ineffective?
Summary Summary CYPHER Service
The tailored approach of the CYPHER service is the execution of integrated workflows designed to provide asset understanding, planning, and development for shale and tight reservoirs.
Summary Summary CYPHER Service (A4)
The tailored approach of the CYPHER service is the execution of integrated workflows designed to provide asset understanding, planning, and development for shale and tight reservoirs.
Summary Summary Expanding Field Development Capability for the Ministry of Petroleum of a Middle Eastern Country
The Ministry of Petroleum engaged Halliburton to assess and increase the level of capability regarding the full field development process within the Ministry’s Exploration and Production oversight group.
Summary Summary SurgiFrac® Service Increases Production; Adds Approximately $112,000 of Value (Case History) Sign in required
An operator needed to accurately place an acid treatment throughout a 1600 foot horizontal open hole section of a 6,765 foot well in the Niagaran reef.
Summary Summary Devonian Stimulation Increases Value by Approximately $2.75 Million (Case History) Sign in required
An operator needed to provide adequate stimulation for a 12,000 foot well in a Devonian formation with open Strawn perforations above the completion packer.
Summary Summary Zonal Coverage Acid™ Treatment Allows Plugged Well to Resume Production; Adds Approximately $791,000 in Value (Case History) Sign in required
An operator needed to design a treatment that would not break into a water zone located just 30 feet below the oil zone in a 9,250 foot well in a Devonian formation. This water problem had led to the well being plugged over 20 years ago.
Summary Summary Ex-Tension Pac(SM) Service Effectively Controls Sand, Increases Gas Production (Case History) Sign in required
A 10,250 ft well in a Frio sand formation needed to be block-squeezed prior to testing. The operator shot the interval and tested it for production. But after short periods of flow, the surface equipment would plug up, and the perforations became covered with formation fines. Although the average flow rate tested at 27 BOPD and 400 MCFD with a BHP of 7400 psi, continued production had become uneconomical.
Summary Summary Ferchek® SC Iron Control System Outperforms Competition; Adds over $1.5 Million in New Production (Case History) Sign in required
An operator wanted to stimulate a six foot Wolfcamp Limestone zone with 20% HCl acid in order to increase production on a 5,100 foot well.
Summary Summary MRIL® Tool Finds New Zone, StiMRIL Confirms It Sign in required
A customer working in a South Texas field drilled his first prospect and wanted as much technical support as possible to determine the potential of the well.
Summary Summary Oman: Operator Proves Cost Savings With LWD High-Resolution Imaging Service Sign in required
Borehole imaging is one of the most rapidly advancing technologies in wireline logging and logging while drilling (LWD). In an onshore horizontal well in Oman, an operator needed more details of the geology in the reservoir in order to gain a better understanding of the distribution of faults, natural fractures, borehole breakouts, and drilling-induced fractures along the well path.
Summary Summary Brunei: Slim Hole GeoTap® Formation Pressure Tester Obtains Critical Pressures in Oversized Hole after Unsuccessful Deployment of Wireline Tools on Pipe Sign in required
After two unsuccessful attempts to deploy a wireline formation tester on pipe into openhole, the customer considered sidetracking this well in order to obtain pressure measurements that were essential to confirm gas reservoir volumes.
Summary Summary Colorado, USA: Sperry’s Directional Drilling and Measurement-While-Drilling Services Key in Piceance Basin Tight Gas Development Project Sign in required
Sperry’s excellent drilling performance with minimal failures and reduced operational times has allowed the operator to achieve the best performance results in the Piceance Basin.
Summary Summary Southern USA: AFR™ Sensor Delivers High-Resolution Imaging in Tight Gas Field Sign in required
The operator of a tight gas field sought to increase their reservoir understanding. However, wireline imaging tools were getting stuck in deviated wells in the heavily fractured formation.
Summary Summary WellLock Resin System
WellLock resin system can function as a gas-impermeable secondary barrier to the primary cement sheath. It is also ideal for squeeze applications and microannuli repairs or for permanent plug and abandonment. It can be solid laden or used as a pure clean fluid.
Summary Summary SPECTRUMSM Diagnostic Services Evaluates Fracture Effectiveness Leading to Lower Completions Costs
SPECTRUMSM Diagnostic Services Identifies Improvement in Stimulation Cluster Efficiency
Summary Summary 6¾-in. 18-SPF MaxForce® DP System
Addressing stimulation difficulty due to divergent permeability layers
Summary Summary Crossed-Dipole Shear-Wave Logs Optimize Pre-Job Fracture Analysis and Post-Job Evaluation
HOCOL ran the crossed-dipole sonic tool inside casing, before and after sandstone hydraulic fracturing jobs in two wells in Columbia, to evaluate changes in anisotropy due to the treatment.
Summary Summary Engineered WaterFrac Service for Ultra-Low-Permeability Formations
New technologies are increasing the effectiveness of water-frac treatments resuting in longer-term production increases. Water-frac treatments normally use friction-reduced water as the fracturing fluid and use small amounts of proppant. A new micro-emulsion surfactant, GasPerm 1000TM, improves production and gets gas on-line faster and at higher rates. The major benefits include 1) reduced fracture-facedamage due to phase trapping in ultra-low-permeability formations, and 2) improved environmental performance because the surfactant contains no phenols.
Summary Summary Effective Management of Borehole and Formation Pressures Increases Drilling Efficiency and Reduces NPT
Pressure-maintenance problems represent a very large percentage of all nonproductive time (NPT).
Summary Summary IPTC Papers
IPTC - Stimulation Planning, Optimization and Placement
Summary Summary Improved Bit Reliability Saves 21.5 hr and $26,552
In the Loma La Lata Field in Latin America, drilling offset wells through the 12-1/4-in., 8-3/4-in., and 6-1/8-in. hole sections required an average of 290 hr.
Summary Summary Formation Pressure Testing and Sampling Provides Guidance on Risks, Formation Data and Fluid Identification
After a completion failed on the original well in Mexico, the well needed to be redrilled into the reservoir.
Summary Summary Expertise That Delivers the Tight Gas Asset
Expertise that delivers the tight-gas
Summary Summary Integrated Field Studies Help Asset Teams Make Optimal Field Development Decisions – Consulting
A horizontal well was drilled in the low-permeability Ellenberger Formation in a field located in Edwards County, Texas.
Summary Summary Holistic asset evaluation for 18 connected onshore and offshore fields resulted in a 40% NPV
The challenge was to determine an optimal development plan for 18 connected fields onshore and offshore.
Summary Summary Increased ROP, Reduced NPT and Doubled Production Results from Point-the-Bit Rotary-Steerable System
The Geo-Pilot point-the-bit rotary-steerable service (RSS) provides real-time continuous at-bit steering and formation evaluation for accurate assessment of wellbore position without requiring trips for the bottomhole assembly
Summary Summary Integration of Completion and Drilling Knowledge in the Pinedale Field Leads to Reductions in NPT— Results in Cost Savings of $1.3 million
Knowledge of the fracture and pore pressures is critical to safe drilling (anticipating and reducing drilling risk) and for designing a fracture treatment to enhance well performance.
Summary Summary Economical Rotary-Steerable BHA Custom-Designed for the Formation
In the South Texas region, where targets are often very tight in extremely low-permeability formations, drilling efficiency and hole integrity are critical factors in staying ahead of the drilling curve. A customer wanted to steer a well accurately to its narrow target in less time than previous wells in the area.
Summary Summary Lost Circulation Treatment in Gas Sand Saved $250,000 in Rig Time
The operator experienced total lost returns at 12,700 ft while drilling a 6.5-in. sidetrack liner section hole with 15.5 ppg mud weight.
Summary Summary Generating Openhole Logs from Cased-Hole PNL Data Fills In Missing Data, Optimizes Drilling and Completions, Reduces Openhole Drilling Costs, Risk and NPT
A variety of drilling situations and borehole conditions, tool pulls, and sensor failure may result in acquisition of inaccurate or unreliable log data in a zone or interval, and in extreme cases, may prevent acquisition or openhole data entirely.
Summary Summary Magnetic Resonance T2 Logging Provides Improved Reservoir Description in Low-Permeability Formations
In low-permeability and mineralogically complex reservoirs, e.g., low-resistivity low-contrast pay and/or tight-gas sandstones, estimates of reservoir water saturation based on conventional log analysis are frequently inaccurate due to (1) unknown or variable pore-water salinities and (2) the effect of the nonproducible bound (irreducible) water contained in the microporosity, e.g., the clays comprising the shales. In these cases, identification of pay can be difficult and when identified, it is not clear which reservoirs will produce water-free hydrocarbons or produce at all because of high irreducible water saturations, low permeability or both.
Summary Summary Dual-Well Monitoring Enhances Microseismic Imaging of Hydraulic-Fracture Stimulation
In long laterals, a single monitoring well may not detect microseisms over the entire well. The use of two monitoring wells improves detection over the entire length of the lateral well. To achieve optimal production in tight-gas fields, microseismic monitoring is used to monitor the effectiveness of hydraulic fracture stimulations. Deformation associated with the stimulation, results in small magnitude micro-earthquakes whose locations are used to image the growth and geometry of the stimulated fracture network. This technique provides unique information for improving the stimulation design. Generally, receiver arrays are placed in a single observation well to record the micro-earthquakes. In long horizontal boreholes improved seismic detection and imaging can be obtained using data from additional observation wells.
Summary Summary Lost-Circulation Treatment Stopped Losses in Deep HPHT Gas Pay Zone
A Canadian operator controlled losses and a significant H2S kick in a deep well using HYDRO-PLUG Hydrating Lost Circulation Treatment dual-action lost circulation material. The severe losses were encountered while drilling through a high-pressure, deep gas pay zone in the foothills of west-central Alberta.
Summary Summary Footage, ROP and Cost Outperformance in Tight Sandstone Field in Oklahoma
QuadPack™ Plus bit performance in an eastern Oklahoma tight sandstone field outperformed competitor bits by wide margins in drilled footage (66%), ROP (35%), and cost per foot (29%).
Summary Summary Numerical modeling optimizes tight-gas fracture treatment, increases cumulative production in South Texas Olmos Formation
Sand A and B are 16-ft and 32-ft thick, respectively, porosities range between 15% and 19%, permeabilities between 0.02 and0.01 md, and water saturations between 31% and 37%.
Summary Summary Completion System Allows Interventionless Stimulation Treatments in Horizontal Wells
While neither of the examples below are tight gas, these technologies are often used in tight gas low permeability wells. Operators often encounter problems in wells with multiple pay zones when attempting to isolate and fracture these zones using conventional openhole completion and stimulation methods. In many cases, conventional completion methods cannot be used because theyallow only partial treatment of a zone. Typically, operators can only perform three or possibly four fracture stages per day in a single well using these methods.
Summary Summary Fluid System Enables Effective Stimulation in Deep, Hot Reservoirs
A new high-temperature, high-density fracturing fluid system, designed by Halliburton’s Saudi Arabia Production Enhancement team, in conjunction with experts in Duncan, Oklahoma, and Houston, recently entered service in Saudi Arabia. Saudi Aramco faced a big stimulation challenge in a new field where reservoir temperatures reached 375°F (191°C) and pressures exceeded 15,000 psi. However, the problem is greater than just this individual well.
Summary Summary In Tight-Gas Formations, T1 Logs Provide Clarity on Wet Gas by Clarifying Resistivity Measurements
Saudi Aramco ran a series of wireline T1 logs to assess the operational and petrophysical feasibility of using this technology.
Summary Summary Changing Bit Design Reduces Multiple Roller Cone Bits in Long-Tangent Section Resulting in Time and Cost Savings
Two or three roller cone bits were required to drill the tight-gas sandstone in a Johnson County, Texas field.
Summary Summary High-Temperature, Low-Permeability Wells Require Low Gel Frac Fluids to Protect from Formation Damage
A customizable, salt-compatible, low-polymer, organometallic crosslinked-gel (CMHPG) fracturing fluid (The SiroccoSM system) is designed for use in high-temperature wells.
Summary Summary Controlling Proppant Flowback to Maintain Fracture Conductivity and Minimize Workovers
A liquid-resin-system to coat proppant on-the-fly provides an economical alternative to resin-coated proppant with the added benefits of enhanced conductivity, proppant consolidation, and flowback control.
Summary Summary Calibrated Fracture-Growth Models Optimize Fracture Staging in Wells with Large Pay Intervals
The Jonah field in Wyoming is a giant gas field producing from the low-permeability (0.024 md) Lance formation, a 2,800+ ft stacked sequence of 20 to 50 lenticular fluvial channel sands interbedded with associated overbank siltstone and floodplain shaledeposits. Sandstone bodies occur as individual 10- to 25-ft thick channels and stacked-channel sequences greater than 200-ft thick, in some cases. The sands are generally discontinuous and sandstone-body geometries are largely uncertain. Within this interval,the net-to-gross ratio varies from 25 to 40%. One of the most important challenges is to obtain effective fracture-height coverage over the entire Lance formation.
Summary Summary Microfracturing and Lost-Fluid Areas Can Be Identified With Wireline Quality Borehole Imaging While Drilling
A compact, focused-electrode device that operates in conductive drilling mud provides omnidirectional laterolog-type resistivity measurements,
Summary Summary High-Temperature Zonal Isolation During Horizontal-Well Stimulation Yields Three-Fold Increase in Production Rate vs. Vertical Well
A customer in south Texas faced the challenge of completing a deep, non-cemented, horizontal well for the purpose of increasing production in tight sand formations. The job called for isolation of multiple zones in a 2000 + ft openhole horizontal section forCobraMaxÆ pinpoint stimulation service and later production. Bottomhole static temperatures could reach 360°F and differential pressures up to 4000 psi were expected. A mixed string of 5½-in. casing on top and 3½-in. casing in the horizontal section would be used, and complete isolation of the planned itervalss and entire annulus was needed.
Summary Summary Lost-Circulation Squeeze Treatment Helped Operator Save $100,000 in Rig Time and Mud Costs
The operator wanted to avoid lost circulation while drilling the production interval with diesel-based fluid.
Summary Summary Geomechanical Model and Reservoir-Characterization Data Help Reduce Drilling Problems in a Highly Resistive Formation
The orientation of regional and borehole stresses is a controlling factor in borehole instability, development of preferential permeability, sand production and casing damage.
Summary Summary Identifying Wet Gas Versus Dry Gas - Lewis Formation Sandstones, Wyoming (Rocky Mountains)
The conventional triple-combo log response in the twosands is very similar: resistivity in the upper sand is 20 Ω-m in the upper sand and 20 to 30 Ω-m in the lower
Summary Summary Drilling Optimization Improves Drilling Performance and Safety While Reducing NPT
Drilling costs are a critical factor in determining the financial returns from an oil and gas investment. Nonproductive time (NPT) accounts for approximately 20% of all rig time and can be much higher in difficult fields.
Summary Summary Identifying Gas vs. Water in a Tight-Gas Reservoir in Mexico
Permeability is one of the critical parameters used to characterize overpressured tight-gas reservoirs and to determine the best fracture design for maximizing gas recovery. Nuclear magnetic resonance (NMR) provides a cost-effective and reliable means for evaluating the fine-grained, laminated, low-permeability (permeabilities ranging from 0.001 md to 0.1 md) sandstone gasreservoirs in northern Mexico, where conventional petrophysical techniques are inadequate for identifying the overpressured gas zones. Data from a single well in which conventional logs, conventional and NMR core analyses and NMR logs were available for the reservoir under study were used to develop a petrophysical model.
Summary Summary Determining the best option to develop large field saves large volumes of capital and time in tight-gas field
A Piceance basin operator was attempting to develop the risk-management program for over 3,000 wells.
Summary Summary Clay-Free Diesel-Based Fluid Provided Superior Wellbore Stability in Horizontal Sand Test and Helped Operator Avoid Sidetracking
Initial efforts to drill an eight-well horizontal project in the Permian Basin Bone Springs sand were unsuccessful.
Summary Summary Hostile-Environment Wireline Formation Tester Reduces NPT in HPHT Boreholes
The extreme conditions and small borehole diameters typical of HPHT make wireline formation testing a challenge.
Summary Summary Optimizing Field-Wide Fracture Stimulation
The remote Frac is a new concept for optimizing the efficiency of conventional hydraulic fracture stimulation operations in fieldswhere well-spacing requirements and completion schedules involve large amounts of manpower, equipment and material, e.g.,tight-gas hydraulic fracturing.
Summary Summary Cumulative Production Gain Exceeding 50% Using Chemically Treating Proppant
Production rates from four offset wells were compared. The completions were similar with the exception of one that had the proppant treated with a conductivity enhancement chemical. Compared to the average production from the other three wells, the SandWedge treated conductivity enhancer proppant well produced more initially, maintained higher production and produced 50% more cumulative.
Summary Summary Clay-Free Diesel Based fluid and Engineered Wellbore Strengthening Technology Promote Successful Drilling through Severely Depleted Sands for $250,000 Savings
The operator wanted to drill a 6-in. hole through severely depleted sands without losing returns.
Summary Summary Post-Frac RPM Conformance Control Increases Gas Production while Decreasing Water Production (80%) Making Wells Profitable
Excessive water production can shorten the life of a producing well and severely decrease its economic potential.
Summary Summary 24% Increase in ROP, Reduced Formation Evaluation and Rig Costs in a High-Temperature (160°C) Well
An operator in the central sector of the UK North Sea was interested in using rotary-steerable drilling in their HPHT field appraisal drilling campaign.
Summary Summary Acoustic LWD Provides Cost-Effective Wireline Quality Reservoir Characterization in Gas Condensate Field
Drilling hazards, such as overpressure or borehole instability, are commonly experienced in tight-gas formations. Using acoustic logging data available in real time for gas detection, to determine the optimal-mud weight, and for look ahead predictions based on correlation with predrill seismic data, these hazards can generally be avoided. In addition, the wireline logging of the horizontal wells used to develop these reservoirs frequently requires costly pipe-conveyance methods and lower-cost alternatives are desirable.
Summary Summary Our Approach
Holistic Approach
Summary Summary About Tight Gas
about tight gas
Summary Summary Tight Gas Challenges & Solutions
Tight Gas Challenges & Solutions
Summary Summary Achieving Successful Cement Slurry Placement
This section contains a brief abstract of papers discussing the application of products used for displacing the drilling fluid andplacing the cement slurry in the annulus, such as, OptiCem, Displace3D and Tuned Spacer. Please refer to Chapter V for productdescriptions and an extended list of papers discussing applications of these products.
Summary Summary Achieving Well (Cement Sheath) Integrity Throughout the Well Lifecycle
This section contains a brief abstract of papers discussing the application products used for reducing pressure buildup in the annulus due to the increase in temperature during hydrocarbon production, e.g, Wellcat and Foamed spacer.
Summary Summary Tight Gas Project Experience
Tight Gas Project Experiences
Summary Summary Accurately Predict the Outcome of Production Enhancement Efforts
Integration of reservoir description (petrophysics), reservoir performance and simulations are used to predict the outcome of production-enhancement efforts on reservoir performance and optimize the financial investment based on the economics of the treatment. MRIL logs and conventional logs are used to zone potential completion intervals and identify reservoir production haracteristics: hydrocarbon type and provide accurate determinations of porosity, permeability, clays and movable fluid volumes.
Summary Summary Boost Production (30%), Reduce Time to Production (68%), and Reduce Proppant Flowback
Proppant flowback into the wellbore reduces the width of the fracture channels, and the loss of proppant from the fractures limitsthe flow-channel conductivity, impairing the effectiveness of the fracture treatment.
Summary Summary 3% Reduction in Cost/ft Achieved Using New Bit Designed for Rock Strength and Directional Requirements.
The 8-3/8-in. Hypercut™ bit design was chosen for drilling the horizontal section in a gas well for a major Middle East producer.
Summary Summary Identifying Wet Versus Gas Charge Reservoir
The reservoir fluids in this well are gas (specific gravity of 0.68) and water (salinity of 25,000 ppm NaCl).
Summary Summary Rapid determination of hydrocarbons in place results in faster recovery and higher NPV in seven condensate fields
Uncertainties existed among seven reservoirs with regard to volumes, condensate yield and pipe diameters.
Summary Summary Microseismic Provides Drainage and Fracturing Optimization Data
The Cotton Valley tight-gas sands in the Oakhill and Carthage fields, east Texas, found between 8,000 ft and 11,000 ft, have permeabilities ranging from 0.005–0.01 md. Successive infill drilling programs and subsequent reservoir depletion (pore pressure gradients of 0.3 to 0.4 psi/ft) necessitated a change from the massive hydraulic fracture treatments that had been typical, tolower-cost completions. However, pumping smaller fracs had unfavorable results. Pinnacle engineers working with Union Pacific Resources (UPR), now Anadarko Petroleum Corp., studied, hydromechanical response, core, production and fracture performance and determined that the Cotton Valley was an excellent candidate for waterfracs, fracture treatments using treated water and very low proppant concentrations.
Summary Summary Preventing Sealing Problems, Improves Integrity, and Reduces NPT in Liner Completions
Conventional liner-top packers are prone to failure due to problems in obtaining a good primary cement seal at the top of the liner.
Summary Summary Slurry Squeeze System Controls Unwanted Water Production without Zonal Isolation of Drillout
Halliburton's BackStopSM service is a slurry squeeze system that controls unwanted water production
Summary Summary Seal Small Cracks and Micro-annulus in Cement Sheath without Intervention
The next few case histories discuss the application of WellLife® III Cementing Service, LifeCem™ and LifeSeal™ cements for automatically sealing small cracks and microannulus that may be formed from unplanned events.
Summary Summary Sustaining Fracture Conductivity in Tight-Gas Reservoirs Increases Cumulative Production (68-272%)
In tight-gas completions, rapid post-fracture production decline is typically associated with loss of fracture conductivity, especiallyin high-temperature/high-stress wells.
Summary Summary Efficiency Processes
factory efficiency processing
Summary Summary More Reliable Completion Results in Higher Well Productivity
During a Latin America field development, a major operator wished to reduce well completion times, increase contact with the reservoir to enable greater productivity from the well and decrease the risk associated with conventional well completions.
Summary Summary Optimization of Wellbore Placement, Maximization of Production and Extending Field Life
The inability of conventional LWD resistivity devices to identify directional differences makes geosteering in the pay zone unpredictable and risky.
Summary Summary PWFT Oval Pad Enables Successful Acquisition of Fluid Samples in a Tight Reservoir
Although this case history involves a low-permeability carbonate reservoir, it shares many of the fluid-sampling and operational issues that are commonly experienced in tight-gas sandstone reservoirs
Summary Summary Use of EMT System Provided Reservoir Characterization Data During UBA Operations
An Oman operator experienced extended drilling times and excessive operational costs while drilling a 2,000-ft horizontal well,underbalanced and with gas-injected fluid.
Summary Summary Prevent Degradation of Cement Sheath by Corrosive Fluids such as CO2 and H2S
This section contains a brief abstract of papers discussing the application of WellLife III Cementing Services
Summary Summary The Digital Asset Service
Competition, escalating costs, the need to develop unconventional resources and the challenge to do more with fewer resources are the forces driving the petroleum industry’s continual efforts
Summary Summary Sized Calcium Carbonate Treatment Helped Eliminate Need to Run Liner in Gas Sand, Resulting in $900,000 Savings
The operator drilled an 8 3/4-in. hole from 12,871 ft to 17,226 ft using an oil-based mud.
Summary Summary Stimulation Fluids and Proppants Optimization for Gas Production
Stimulation Fluids and Proppants Optimization for Gas Production
Summary Summary Reduced NPT Achieved Using Casing-While-Drilling Techniques
Drilling through unstable formations can result in significant nonproductive time (NPT).
Summary Summary Whole-Rock Chemostratigraphy Resolves Complex Stratigraphy, Enhances Formation Evaluation and Improves Geosteering
The elemental composition of sedimentary rocks can serve as a powerful tool for resolving stratigraphic uncertainties that affect well-to-well correlation, geosteering and facies analysis.
Summary Summary Tight Gas HSE & Service Quality
HSE & Service Quality
Summary Summary Reduce Nonproductive Completion Time and Increase Production Using Flow-Through Composite Frac Plugs (FTCFPs)
Flow-through composite frac plugs (FTCFPs) can serve as an effective alternative to traditional isolation methods or to induced stress diversion. FTCFPs allow all zones to produce during the completion so that that no zones are shut-in for long periods. In addition, zones do not have to be killed after clean-up and when the bottomhole flowing pressure is reduced during flowback, previously treated zones contribute to the clean-up of each new treatment. FTCFP use can significantly improve completion efficiency, relative to traditional isolation methods, and improve production rates.
Summary Summary Multistage Pinpoint Fracturing in Low-Permeability Formations Lost Hills Field, California
The pinpoint fracturing (PPF) method creates perforations by pumping abrasive slurry down coiled tubing through a jetting nozzle while the main treatment is pumped down the annulus casing/coiled-tubing annulus. Sand plugs are used to achieve isolation between fracture treatments. Application of the pinpoint stimulation technique for multistage fracturing in the Lost Hills field, California, vertical well, significantlyimproved production and reduced completion costs. Porosity in the low-permeability Belridge Diatomite reservoirs is high, 45 to 65%, but permeability ranges from 0.1 to 100 md. Previously, emphasis had been placed on reducing fracture treatment costs by pumping fewer stages and lower proppant volumes to stimulate approximately 1000 ft of net pay, but this resulted in a decrease in cumulative production. Tests using an increased number of fracture stages did not improve economics because of the increased fracturing costs and minimalproduction increases. A pilot test compared the pinpoint fracturing technique performed on 14 wells with the standard perf-and-bridge plug method in 26 wells. The same fracturingparameters, fluid volumes and types, and chemicals were used to keep the basic fracture design the same.
Summary Summary Precise Fracture Placement Increases Production and Optimizes Reservoir Drainage
Without proper isolation methods, fracturing uncased horizontal wells is impractical. The SurgiFracÆ service provides fast and precise placement of fractures in deviated and horizontal wellbores without requiring mechanical or chemical plugs to isolate fracture treatments. Multiple fractures can be created within a few hours. The technique is a combination of three separate processes: hydrajetting, hydraulic fracturing, and coinjection down the annulus. Frac treatment costs are re-duced because the low fracture tortuosity inherent in the process requires less equipment and lower viscosity fluids.
Summary Summary Microseismic Utilized in the Wilcox Sand, Burgos Basin, Northern Mexico
Pemex is actively developing the Wilcox tight-gas sands in the Arcabu-Culebra Field in the Burgos Basin, Northern Mexico.
Summary Summary Pore Pressure Prediction and Real-Time Monitoring and Analysis
HpHt wells are typically drilled with a very narrow operating envelope between the mud and fracture gradients.
Summary Summary Tight Gas & Complex Gas
No two tight gas wells or reservoirs are exactly alike. To determine the best drilling and completion methods, each requires a thorough understanding of every aspect: including HSE (health, safety and environment) issues and regulations, reservoir description, formation evaluation, reservoir modeling and stimulation design and execution.
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