Analysis of Leakage Mechanism and Research on Sealing Technology in Hongxing Block
Sinopec Jianghan Petroleum Engineering Company, Wuhan 430000, China
| Abstract: | The Hongxing area is structurally located in the Shizhu syncline (west of Qiyueshan fault) of the high and steep fold belt in eastern Sichuan. It is geographically located in Lichuan City, Hubei Province, and Shizhu County, Chongqing City, covering an area of 3000 Square kilometre. The main part of the area is mountainous terrain, with a ground elevation of 600-1600 meters. By summarizing the historical data of drilling wells, during drilling construction in the block, leakage generally occurs, The proportion of time required to handle complexity is too high, which seriously affects the efficiency of drilling construction. The main leakage layers are Shaximiao Formation, Jialing River Formation, Feixianguan Formation, Changxing Formation and Wujiaping Formation, which mainly induced crack leakage, with a small amount of permeability leakage. The leakage of Shaximiao Formation is the highest, reaching 17279.76 cubic meters, accounting for 45.45%. The complex occurrence of well collapse and leakage in the Wujiaping Formation accounts for 58.18%, respectively. In response to the high risk of well leakage, large amount of leakage, and low success rate of plugging in the Hongxingarea, analysis and research are conducted on the leakage mechanism in the Hongxingarea, constructing a formula for plugging fractured formations in the Hongxing block forming a unique plugging technology research, and effectively solving the leakage risk in this block. |
| Keywords: | Well Leakage Mechanism; Sealing System; Sealing Characteristics |
| DOI: | 10.57237/j.jest.2023.05.002 |
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Received: 13 November 2023
Accepted: 6 December 2023
Published Online: 27 December 2023
Funding
| 1. | 中国石化重大科技项目“红星二叠系页岩气有效开发关键研究” (P22507) |
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