地质工程一体化关键技术在克拉苏构造带高效开发中的应用实践

doi:10.3969/j.issn.1672-7703.2020.02.012

摘要/Abstract

摘要： 塔里木盆地库车坳陷克拉苏构造带，储层埋藏深度大，地质条件复杂，导致钻完井工程中面临着相关井控安全、建井时效、工程质量、单井提产等方面的巨大挑战，针对这些制约勘探开发进程的关键技术难题，建立了一套以地质力学为桥梁的地质工程一体化技术流程，形成了井位优选、井轨迹优化、钻前地层压力预测、钻井井壁稳定性预测、完井提产优化和开发中出砂出水预测方法。将地质研究、工程设计和现场实施组织纳入一体化协作体系，解决工程难题，实现克拉苏构造带“三提”—— 提速、提质、提产，开发井钻井成功率100%，单井钻井复杂平均减少 40%，井控安全得到有力保障，改造后单井平均无阻流量由原来的68×104m3/d，提高到279×104m3/d。顺利实现了克拉苏东部150×108m3/a 天然气建产，助力克拉苏西部万亿立方米大气藏的发现，为超深层复杂油气藏高效开发积累了可借鉴的技术和经验。

关键词: 克拉苏, 地质工程一体化, 提速, 提质, 提产, 高效开发

Abstract: In the Kelasu structural belt of the Kuqa Depression in the Tarim Basin, the burial depth of reservoir is deep and the geological conditions are complex, which leads to great challenges in drilling and completion operations, such as well control safety, well construction time efficiency, engineering quality, single well production increase and so on. In view of these key technical issues, which restrict the exploration and development process, a set of technical processes of geology-engineering integration with geo-mechanics as a bridge has been established, forming a series of methods, such as well location selection, well trajectory optimization, pre-drilling formation pressure prediction, borehole stability prediction, completion and stimulation optimization, and sand and water production prediction in development. Geological research, engineering design, and on-site operation, are organized and integrated into a collaborative system to solve engineering issues and achieve “3 improvements” in the Kelasu structural belt: improvements in drilling speed, improvements in quality, and improvements in production. The drilling success rate of development wells is 100%, complex drilling issues in single wells are reduced by 40% on average, and well control safety is effectively guaranteed. After stimulation, the average open gas flow of a single well increased from 68×104 m3/d to 279×104 m3/d. Gas productivity of 150×108 m3/a in the eastern Kelasu area has been successfully established and contributed to the major discovery of a trillion square meters of gas reservoirs in the western Kelasu area, which has provided technologies and accumulated experience for efficient development of ultra-deep complex reservoirs.

中图分类号:

张辉, 杨海军, 尹国庆, 王海应, 徐珂, 刘新宇, 王志民. 地质工程一体化关键技术在克拉苏构造带高效开发中的应用实践[J]. 中国石油勘探, 2020, 25(2): 120-132.

Zhang Hui, Yang Haijun, Yin Guoqing, Wang Haiying, Xu Ke, Liu Xinyu, Wang Zhimin. Application practice of key technologies of geology-engineering integration for efficient development in the Kelasu structural belt, Tarim Basin[J]. China Petroleum Exploration, 2020, 25(2): 120-132.

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