延川南煤层气复杂缝网整体压裂技术研究与应用  

Research and application of integral network-fracturing of coal-bed methane of southern Yanchuan

作　　者：赖建林[1] 房启龙[1] 高应运[1] 魏伟[1] Lai Jianlin;Fang Qilong;Gao Yingyun;Wei Wei(Petroleum Engineering Technology Research Institute,East China Company,SINOPEC,Nanjing,Jiangsu 210031,China)

机构地区：[1]中国石化华东油气分公司石油工程技术研究院,江苏南京210031

出　　处：《油气藏评价与开发》2018年第3期79-82,共4页Petroleum Reservoir Evaluation and Development

摘　　要：由于煤储层端割理和面割理发育的特点,压裂容易形成复杂的裂缝形态,常规双翼裂缝模型并不适用于煤层气压裂设计优化。为了提高煤层气整体压裂开发效果,提出了煤层复杂裂缝等效渗流表征方法,将复杂的网络裂缝等效为高渗透带,通过优化高渗透带的大小和渗透率,获得最佳的整体压裂裂缝长度和导流能力。同时采用三维裂缝模拟软件进行体积压裂施工参数优化,并开展3口井压裂施工和井下微地震裂缝监测试验。结果表明,压裂裂缝波及范围较广,复杂程度较高,压后平均日产气量137 6.7 m^3,为实现煤层气田整体压裂开发提供了技术支撑。Due to the well-developed end cleat and surface cleat, the complicated fracture morphology forms easily in the coal-bed fracturing, and the conventional double-wing fracture model is not suitable for the optimization of the coal-bed methane fracturing design. In order to improve the production of the coal-bed methane, we proposed a characterization method for the equivalent seepage of the complex fracture, in which the complex network fracture was equivalent to the high permeability zone. By optimizing the size and permeability of the high permeability zone, we got the best overall fracturing fracture length and fracture conductivity. Meanwhile, we also optimized the pumping parameters by using 3D fracturing simulation software, and carried out the fracturing operation and down-hole micro-seismic monitor tests of 3 wells. The results showed that the fracture length covers a wide field and the complexity after fracturing is high, and the average post-fracturing daily production is 1 376.7 m^3/d. It provides a technical support to the integral fracturing development of coal-bed methane.

关 键 词：煤层气 整体压裂 缝网压裂 体积压裂 参数优化 

分 类 号：TE357[石油与天然气工程—油气田开发工程]