渝东南盆缘转换带常压页岩气勘探实践

doi:10.3969/j.issn.1672-7703.2020.01.012

摘要/Abstract

摘要： 四川盆地东南部及其盆缘转换带五峰组—龙马溪组常压页岩气资源丰富，同时面临页岩品质变差、地层压力系数低、最大水平主应力和最小水平主应力差异大等地质难点。为了实现常压页岩气高产稳产和效益开发，从基础地质研究、低成本工程工艺技术攻关、组织生产管理等方面入手，在南川—武隆地区持续开展常压页岩气勘探实践，探索形成了布好井、穿好层、压好缝、降好本、管好井的“五好工程”实践认识与做法。“五好工程”实践表明：深化保存条件、沉积微相、构造应力等关键要素研究，是选准甜点目标、优化甜点层位、完善压裂设计的基础，创新低成本优快钻完井、高效压裂工程工艺技术是实现效益开发的关键，创新“2+3”管理运行新模式是提质增效的保障。

关键词: 渝东南盆缘转换带, 五峰组-龙马溪组, 常压页岩气, 勘探实践

Abstract: The Wufeng and Longmaxi Formations in the southeast part and the marginal transition zone of the Sichuan Basin are rich in shale gas resources at normal pressure, but face geological difficulties such as poor shale quality, low formation pressure coefficients, and large differences between maximum and the minimum horizontal principal stress. In order to achieve high and stable production, and efficient development, exploration has been carried out on normal pressure shale gas in the Nanchuan- Wulong area. Basic geological research methods, low-cost engineering technology and production management, etc. have been applied, with the result that understanding and practice based on ‘five optimizations’ has been established. The five optimizations are: optimized well locations; optimized trajectory in targets; optimized fractures; optimized cost control, and optimized well management. This program has proved that research on preservation conditions, sedimentary microfacies and tectonic stress is the essential base for selecting and optimizing sweet spot intervals and improving fracturing design, as well as developing innovative low-cost, fast, drilling and completion techniques. Effective fracturing engineering technology is also important for efficient development, and innovative ‘2+3’ management and operation is the guarantee for improving production quality and efficiency.

中图分类号:

何希鹏, 王运海, 王彦祺, 张龙胜, 汪凯明, 高玉巧, 刘明. 渝东南盆缘转换带常压页岩气勘探实践[J]. 中国石油勘探, 2020, 25(1): 126-136.

He Xipeng, Wang Yunhai, Wang Yanqi, Zhang Longsheng, Wang Kaiming, Gao Yuqiao, Liu Ming. Exploration practices of normal-pressure shale gas in the marginal transition zone of the southeast Sichuan Basin[J]. China Petroleum Exploration, 2020, 25(1): 126-136.

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