鄂尔多斯盆地陆相页岩气缝网压裂技术应用分析

摘要/Abstract

摘要： 鄂尔多斯盆地延长组陆相页岩储层储集条件较好，具有良好的资源开发前景，但是与海相页岩相比，脆性矿物含量相对较低，黏土矿物含量相对较高，选择合理的改造工艺成为推动该盆地延长组页岩气资源高效勘探开发的迫切任务。在对缝网压裂技术进行分析的基础上，结合鄂尔多斯盆地页岩储层岩石、应力场特性以及天然裂缝发育状况，对缝网压裂的可行性进行分析。以J1 井延长组长7 段页岩储层为例，运用测试压裂及净压力拟合分析对压裂设计及施工进行指导，利用数值模拟手段对压裂参数进行优化，通过井下微地震监测手段对压后效果进行评估，结果表明，压后形成的缝网系统有效的沟通了全部射孔井段，取得了较好的改造效果。

关键词: 鄂尔多斯盆地, 陆相页岩气, 缝网压裂, 测试压裂, 微地震检测

Abstract: Well stimulation is necessary for the production of continental Yanchang shale gas in Ordos Basin in view of its low content of brittle minerals and high content of clay minerals. This paper discusses the feasibility of network fracturing based on the analyses of the technique, shale gas reservoirs, stress field and natural fractures. Taking Chang 7 Member of Yanchang Formation in Well J1 as an example, mini frac and net pressure matching are used for fracturing design and operation, and numerical simulation is used for parameter optimization. Microseismic monitoring shows that all perforation intervals have been effectively connected by the fracture network.

中图分类号:

逄仁德　崔莎莎　尹宝福　侯云翌. 鄂尔多斯盆地陆相页岩气缝网压裂技术应用分析[J]. 中国石油勘探, 2015, 20(6): 66-71.

Pang Rende, Cui Shasha, Yin Baofu, Hou Yunyi. Network Fracturing and Its Application to Continental Shale Gas in Ordos Basin[J]. China Petroleum Exploration, 2015, 20(6): 66-71.

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