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| 缝洞型储层缝宽动态变化及其对钻井液漏失的影响 | |
| 引用本文： | 李大奇,康毅力,曾义金,练章华,杜春潮.缝洞型储层缝宽动态变化及其对钻井液漏失的影响[J].中国石油大学学报(自然科学版),2011,35(5):76-81. |
| 作者姓名： | 李大奇 康毅力 曾义金 练章华 杜春潮 |
| 作者单位： | 1. 西南石油大学油气藏地质及开发工程国家重点实验室,四川成都,610500 2. 中石化石油工程技术研究院,北京,100101 3. 中石化西北油田分公司,新疆乌鲁木齐,830013 |
| 基金项目： | 国家“973”计划课题，国家科技重大专项课题 |
| 摘 要： | 以塔河油田12区为例,根据缝洞型碳酸盐岩储层的地质特征,建立考虑溶洞存在和漏失动态的有限元模型,研究裂缝的宽度变化规律及其对钻井液漏失的影响。结果表明:缝洞型储层裂缝宽度对井筒有效压力极为敏感,在几兆帕的正压差下,裂缝宽度增量便可达毫米级;钻井液漏失使得裂缝变宽,裂缝形态也相应地发生改变,增加了漏失控制难度;除了缝洞发育外,缝洞型储层的强应力敏感性也是井漏的重要原因之一;钻井中精细控制井筒压力,保持井筒压力微过平衡,并在钻进储层段前随钻加入毫米级高酸溶性暂堵堵漏材料,可以有效预防大部分漏失发生。 |
| 关 键 词： | 缝洞型储层 裂缝宽度 井漏 防漏堵漏 数值模拟 |
Dynamic variation of fracture width and its effects on drilling fluid lost circulation in fractured vuggy reservoirs |
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| LI Da-qi,KANG Yi-li,ZENG Yi-jin,LIAN Zhang-hua,DU Chun-chao.Dynamic variation of fracture width and its effects on drilling fluid lost circulation in fractured vuggy reservoirs[J].Journal of China University of Petroleum,2011,35(5):76-81. | |
| Authors: | LI Da-qi KANG Yi-li ZENG Yi-jin LIAN Zhang-hua DU Chun-chao |
| Institution: | LI Da-qi1,KANG Yi-li1,ZENG Yi-jin2,LIAN Zhang-hua1,DU Chun-chao3 (1.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu 610500,China,2.Research Institute of Petroleum Engineering,SINOPEC,Beijing 100101,3.Northwest Oilfield Company,Urumqi 830013,China) |
| Abstract: | Based on the geological condition of Tahe Oilfield area 12,a finite element model considering vuggy and drilling fluid losses was established and the fracture width change and its effects on lost circulation were researched by using the model and the drilling practices.The results show that the fracture width is extremely sensitive to the wellbore pressure in fractured vuggy reservoirs,and the fracture width increments will be up to millimeter-level under the positive pressure difference of several mega pas... |
| Keywords: | fractured vuggy reservoirs fracture width drilling fluid losses lost circulation control numerical simulation |
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