Cementing Best Practices and Teamwork Save Operator over $300,000

Operator's Challenge

The measure of success of a cement job is often a cement bond log (CBL). A poor CBL may necessitate perforating, testing the bond behind the pipe, or possibly squeezing. A major operator was drilling a series of wells offshore Louisiana. After cementing the production casing, a poor bond log resulted in six squeeze jobs, the loss of 178 hours of rig time, and $370,000 in additional costs.

Halliburton's Solution

Working as part of a team composed of the operator and other service companies, Halliburton helped evaluate the work done in setting the production casing in the troublesome well. The team developed several recommendations for improvement, including the following:

1. Change the mud, keeping yield point and gel strength to a minimum

2. Implement a centralizer program to achieve a maximum casing standoff

3. increase efforts to obtain pipe movement during pumping

4. Increase spacer volume to account for washouts

5. Prior to cementing, circulate the well "bottoms up"

To minimize downtime, Halliburton used the Quick Latch™ plug container. The CJOBSIM™ program was used to help design the job. Halliburton also used a more expensive, though appropriate slurry.

Economic Value Created

Bond logs were excellent and no squeezes were required. Even though the cost of cementing the second well was nearly twice the cost of the initial cementing job on the trouble well, the operator saved 7.4 days of rig time and over $300,000.