Deliquification of South Texas Gas Wells Using Corrosion Resistant Coiled Tubing: A Six Year Case History
Bibliographic record
Abstract
Deliquification of South Texas Gas Wells Using Corrosion Resistant Coiled Tubing: A Six Year Case History K. L. Poppenhagen; K. L. Poppenhagen ConocoPhillips Search for other works by this author on: This Site Google Scholar L. K. Harms; L. K. Harms ConocoPhillips Search for other works by this author on: This Site Google Scholar R.. Wilkinson; R.. Wilkinson ConocoPhillips Search for other works by this author on: This Site Google Scholar D. E. Glover D. E. Glover ConocoPhillips Search for other works by this author on: This Site Google Scholar Paper presented at the SPE/ICoTA Coiled Tubing and Well Intervention Conference and Exhibition, The Woodlands, Texas, USA, March 2010. Paper Number: SPE-130632-MS https://doi.org/10.2118/130632-MS Published: March 23 2010 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Get Permissions Search Site Citation Poppenhagen, K. L., Harms, L. K., Wilkinson, R.. , and D. E. Glover. "Deliquification of South Texas Gas Wells Using Corrosion Resistant Coiled Tubing: A Six Year Case History." Paper presented at the SPE/ICoTA Coiled Tubing and Well Intervention Conference and Exhibition, The Woodlands, Texas, USA, March 2010. doi: https://doi.org/10.2118/130632-MS Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAll ProceedingsSociety of Petroleum Engineers (SPE)SPE/ICoTA Well Intervention Conference and Exhibition Search Advanced Search Abstract Running coiled tubing can be an effective tool to deliquify gas wells, but this practice was discontinued in early 2000 in ConocoPhillips Lobo Field in South Texas because of problems experienced due to CO2 corrosion with standard coiled tubing metallurgy. Since 2004, ConocoPhillips has installed 90 corrosion resistant coiled tubing velocity strings as an alternative to conventional carbon steel coiled tubing. These installations have yielded 5 mmcfd in incremental gas rate and the change to a corrosion resistant metallurgy has drastically reduced the high failure rate and costly workovers that resulted from previous carbon steel installations. Various key learnings including candidate selection criteria and future application recommendations will be presented in addition to representative well types and production profiles. Metallurgy comparisons, post-use inspection findings and full-cycle cost implications will also be presented. Keywords: production chemistry, inspection, reservoir surveillance, hangoff, well integrity, velocity string, corrosion inhibition, exhibition, oilfield chemistry, critical velocity Subjects: Artificial Lift Systems, Well & Reservoir Surveillance and Monitoring, Production Chemistry, Metallurgy and Biology, Gas well deliquification, Completion Installation and Operations, Well Integrity, Coiled tubing operations, Subsurface corrosion (tubing, casing, completion equipment, conductor), Corrosion inhibition and management (including H2S and CO2) Copyright 2010, Society of Petroleum Engineers You can access this article if you purchase or spend a download.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.003 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.002 | 0.002 |
| Science and technology studies | 0.003 | 0.002 |
| Scholarly communication | 0.001 | 0.002 |
| Open science | 0.001 | 0.002 |
| Research integrity | 0.005 | 0.004 |
| Insufficient payload (model declined to judge) | 0.003 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".