Archive of Texas PTTC Workshops

Wellbore Management Workshop

March 22, 2001, Midland, Texas. Sponsored by the PTTC Texas-Permian Basin.

Overview
The Wellbore Management Workshop was developed to assist Independent oil and gas operators working in the Texas Permian Basin. The workshop included a discussion of wellbore problems, case studies, and action plans and programs that have been used successfully to reduce well failure frequencies.

Session 1
"The Producing Well Improvement Process." Kent Gantz and Ed Delgado, Schlumberger IPM. Summary: Schlumberger IPM uses a systematic and continually improving method to optimize and repair producing wells. This method, called the Producing Well Improvement Process (PWIP), is a process in which well production optimization and wellbore equipment repair procedures are implemented and improved over time to provide the longest economical well life.

Session 2
"Reducing Downhole Failures in the SSAU." Ronnie Aten, Jamie Reece, Randy King, Russ Rogers, and Jerry Brzozowski, Amerada Hess. Summary: The Amerada Hess team discussed the corporation's Technician, Pumpshop, Sucker-Rod, and Tubing programs, and the corporation's purpose and use of controllers on rod pumping wells.

Session 3
"Aggressive Action Program and Case Studies on Reducing Wellbore Failures in 22 Fields in 6 Permian Basin Counties." Bill Webb, consultant, Bill Webb, Inc. Summary: This case study looked at well failures on leases producing from formations in Ector, Winkler, Regan, Crockett, Culberson, and Reeves counties, Texas. Of 406 beam-pumped producing oil wells in these counties, 112 wells experienced either a rod or tubing failure within a one-year time period. An aggressive action plan was begun to reduce future failures and complement a comprehensive well failure program. The plan included changing rod strings when a well experienced a rod failure and upgrading and inspecting tubing strings when a tubing leak occurred. This aggressive plan was fully documented and post audited; detailed cost-tracking spreadsheets verify the economic success of the undertaking.

Session 4
"Modern Total Well Management: Sucker-Rod-Lift Case Study." Lynn Rowlan and Jim McCoy, Echometer. Summary: A sucker-rod-lift field case study was presented to illustrate the procedure and benefits of an integrated analysis of pumping systems. Oilfield operators continually need to verify that their wells are being produced at optimum capacity and in a cost-effective manner. An integrated analysis of the pumping system, called the Total Well Management (TWM), is required to reduce operating costs, increase oil production, and increase net income. The integrated analysis of the pumping system must include performance and interaction of all the elements: prime mover, surface equipment, well bore equipment, down-hole pump, down-hole gas separator, and reservoir. This analysis, based on data obtained at the surface without entering the wellbore, yields an accurate representation of the conditions that exist on the surface, with the wellbore, and within the reservoir.

Session 5
"Paraffin and Asphaultene Formation Damage." Ken Barker, Baker Petrolite. Summary: All current stimulation techniques either ignore organic damage or bypass it. This leaves the original permeability blocked, which reduces production. Production can be restored to damaged wells if we understand the reasons why the damage occurred. This presentation described organic damage, why it occurs, why present stimulation techniques don't work, and how it can be removed.

For more information about this and other PTTC workshops, please contact Sigrid Clift at
512-471-0320 or e-mail sigrid.clift@beg.utexas.edu.