红星区块漏失机理分析及堵漏技术研究
中国石化江汉石油工程公司, 湖北武汉 430000
| 摘 要： | 红星地区构造上处于川东高陡褶皱带石柱复向斜（齐岳山断层以西），地理位置位于湖北省利川市、重庆市石柱县境内，面积3000平方千米，主体为山地地貌，地面海拔600-1600米。通过总结完钻井井史资料，区块内钻井施工中漏失普遍发生，处理复杂所需时间占比过高，严重影响钻井施工效率，主要漏失层位为沙溪庙组、嘉陵江组、飞仙关组、长兴组、吴家坪组，以诱导性裂缝漏失为主，少量渗透性漏失。沙溪庙组漏失量最高，达到17279.76方，占比45.45%。吴家坪组发生井垮、井漏等复杂分别占比58.18%。针对红星地区井漏风险高、漏失量大、堵漏成功率低等难点，分析研究红星地区漏失机理，构建适用于红星区块裂缝型地层堵漏体系配方，形成特色堵漏技术研究，提高一次性堵漏成功率，有效解决该区块漏失风险。 |
| 关 键 词： | 井漏机理; 堵漏体系; 封堵性 |
| DOI： | 10.57237/j.jest.2023.05.002 |
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收稿日期: 2023-11-13
接受日期: 2023-12-06
在线出版日期: 2023-12-27
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 |
基金
| 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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