Wellbore Surveying

Wellbore surveys provide definitive data that depict the position of a borehole or well path in three-dimensional space. Sperry Drilling services' wellbore surveying service delivers a comprehensive well positioning approach, generating the necessary risk versus reward analysis and survey program. Sperry can also help ensure survey executions per expectations and provide a one-stop shop for well position information.

  • Early analysis of well position requirements
  • Evaluation of risk versus reward and creation of a survey program
  • Help ensure wellbore construction surveys meet operator and well position expectations
  • Capture of lessons learned regarding wellbore placement
  • Load wellbore data into definitive database
  • Reporting and distribution of final survey
Directional Sensors
When drilling vertical, horizontal, or extended reach wells, obtaining accurate measurements of inclination and azimuth is a fundamental requirement. For these measurements, Sperry Drilling services offers three types of MWD directional sensors and the Evader® MWD gyro service.
Evader® Gyro-While-Drilling Service
Aids in orienting and steering the drillstring. Improves wellbore guidance to avoid collision with other wells on multi-well platforms. Immune to magnetic interference.
Radian® Azimuthal Gamma Ray and Inclination Service
The Radian® azimuthal gamma ray and inclination service provides high-quality borehole images for geosteering, and precise gamma-ray measurements for reservoir evaluation.

Wellbore Surveying

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Summary Summary MaxSurvey Infographic Sign in required
Infographic about MaxSurvey
Summary Summary Survey Management Infographic Sign in required
Infographic about Survey Management
Summary Summary Oilfield Technology: M/LWD Q&A Sign in required
2017 Oilfield Technology M/LWD Q&A article discusses the applications and benefits of the Radian™ Service and 9 1/2-inch ALD™ Service
Summary Summary Gulf of Mexico: Geosteering Solution Successfully Lands Wellbore in Difficult Section, Saving Operator USD 600,000 Sign in required
In a deepwater (water depth of over 7,000 ft (2,134 m)) location in the Gulf of Mexico, an operator was struggling to see the approaching reservoir top during the landing section.
Summary Summary Oman: Operator Locates Top of Fish Target with ABI™ Sensor Sign in required
An operator working in a mature field in Oman attempted to drill a deviated well, but, while drilling the 8½-in. (215.9-mm) buildup section, the bottomhole assembly (BHA) became stuck for approximately a month.
Summary Summary USN-Canada: Operator improves reservoir exposure to 100% with innovative Sperry Drilling geosteering solution despite hole-size challenge Sign in required
With a drilling program of multiple unconventional wells, an operator in Alberta, Canada has been searching for a solution to improve the economic viability of its assets to a lower cost per BOE.
Summary Summary Malaysia: Talisman Uses Sperry’s Evader® MWD Gyro Service to Avoid Downhole Collisions Sign in required
Evader® Gyro-While-Drilling (GWD) service was used to closely monitor bottomhole assembly (BHA) progress inside the magnetic interference zone.
Summary Summary Venezuela: Petroindependencia Drills the Longest ERD Well While Staying 100 Percent in Target Zone Sign in required
Petroindependencia, a Petróleos de Venezuela S.A. (PDVSA) joint venture, operates in the Orinoco oil belt, where the target reservoirs are located in the Morichal member of the Oficina formation, which can be characterized as a shallow, unconsolidated formation.
Summary Summary Canada Alberta: Operator Reports Total Estimated Savings of More Than US$7.6 Million Sign in required
An operator working in the McMurray formation of northern Alberta, Canada, sought to increase operational efficiency and decrease total days per well. The operator had previously taken seven to eight days to drill a well at an approximate cost of US$997,000 (C$1.3 million) per well.
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 United States, Alaska: Interpolated In-Field Referencing (IFR2) service confirms accuracy of MWD data Sign in required
When an oncoming magnetic storm capable of causing errors in survey calculations was approaching, a customer’s drilling engineer for a rig on Alaska’s North Slope asked Sperry Drilling Alaska Survey Management Group to provide the interpolated In-Field Referencing (IFR2) service for the storm’s duration.
Summary Summary Ecuador:Operator Saves a Well from Abandonment in Problematic Field Sign in required
Operaciones Rio Napo, an operator in Ecuador, was drilling a difficult wellbore section with multiple formation changes consisting of interbedded shales, limestones, and sandstones.
Summary Summary Mexico: Geo-Pilot® Rotary Steerable System with ABI™ At-Bit Inclination Sensor Provides Real Time Inclination Readings Saving PEMEX 3.8 Days in Rig Costs Sign in required
PEMEX, the national oil company of Mexico, contracted Sperry Drilling services to drill an offshore development well in an exploratory reservoir, 113 km northeast of Ciudad del Carmen in the state of Campeche, Mexico. The objective of this project was to deliver commercial oil production and provide primary field information for the customer.
Summary Summary USA, North Dakota Bakken: Operator Achieves More Accurate Wellbore Placement Using a New Azimuthal Gamma Ray Service Sign in required
An operator in North Dakota’s Middle Bakken shale formation sought a solution that would enable effective drilling and geosteering in a formation with little gamma ray variation, while minimizing drilling costs.
Summary Summary USA, Southern: Operator Reduces Wellbore Position Uncertainty and Avoids Potential Costly Sidetracks for a Blowout Relief Well Sign in required
While conducting operations on an unconventional relief well for a blowout in a field in the southern part of the USA, an operator observed a discrepancy in the well position after analyzing the data from two separate surveys in the same wellbore.
Summary Summary Survey Management Datasheets Sign in required
Datasheets of the services survey management offers
Summary Summary Radian® Azimuthal Gamma Ray and Inclination Service
The Radian® azimuthal gamma ray and inclination service provides a cost-effective solution to geosteering challenges.
Summary Summary Wellbore Surveying
Wellbore Surveying
Summary Summary Directional Sensors
When drilling vertical, horizontal, or extended reach wells, obtaining accurate measurements of inclination and azimuth is a fundamental requirement. For these measurements, Sperry Drilling services offers three types of MWD directional sensors and the Evader® MWD gyro service.
Summary Summary Evader® Gyro-While-Drilling Service
Aids in orienting and steering the drillstring. Improves wellbore guidance to avoid collision with other wells on multi-well platforms. Immune to magnetic interference.
Summary Summary Radian® Azimuthal Gamma Ray and Inclination Service
The Radian® azimuthal gamma ray and inclination service provides high-quality borehole images for geosteering, and precise gamma-ray measurements for reservoir evaluation.
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