Journal of Southwest Petroleum University(Science & Technology Edition) ›› 2023, Vol. 45 ›› Issue (6): 125-134.DOI: 10.11885/j.issn.1674-5086.2021.10.21.32

• OIL AND GAS ENGINEERING • Previous Articles     Next Articles

Application of Dissolvable Screen Pipe in HTHP Gas Well in Tarim Oilfield

WEI Junhui1, JING Hongtao1, XIE Ying2, LI Jianming1, SI Xiang1   

  1. 1. Oil and Gas Engineering Research Institute, Tarim Oilfield Company, PetroChina, Korla, Xinjiang 841000, China;
    2. Kela Oil and Gas Production Administrator Area, Tarim Oilfield Company, PetroChina, Korla, Xinjiang 841000, China
  • Received:2021-10-21 Published:2024-01-06

Abstract: In order to solve the problem of clean completion of high temperature and high pressure gas wells and rapid workover of sand buried wells in Tarim Oilfield, a dissolvable screen pipe has been developed that can be acid dissolvable to form a production channel, which can achieve the goal of clean completion by fully replacing the fluid. The dissolvable screen pipe is connected to the lower tubing column of the packer by pins, which can be fished in sections during workover operations, reducing the workload, lowering the workover cycle, reducing the risk and improving the workover efficiency, thus reducing the damage to the reservoir during workover operations. The material dissolved in all thicknesses at a temperature of 110 ℃. The physical properties also met the seal design requirements of 35 MPa internal pressure test and 15 min continuous steady pressure, and no deformation in the 650 kN tensile load test. In the three wells applied in the field, the average recovery rate of 211.0% was much higher than the previous 78.1%, achieving the effect of low-cost clean completion and safe repair operation later, which provides a good reference for the application effect of this technology.

Key words: HTHP, dissolvable screen pipe, clean well completion, pin connection, sectional fishing

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