方法理论

井中微地震监测技术在平桥南页岩气区块应用效果分析

  • 黄小贞 ,
  • 谷红陶
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  • 1. 中国石化华东油气分公司勘探开发研究院,江苏 南京 210011
    2. 中国石化华东油气分公司南川页岩气项目部,重庆 408400
黄小贞(1989 —),女,助理工程师,主要从事非常规油气地质及勘探评价等方面的研究工作。通讯地址:江苏省南京市鼓楼区热河南路37号,邮政编码:210011。E-mail:huangxiaozhenm@163.com

收稿日期: 2019-03-01

  网络出版日期: 2020-02-04

基金资助

“十三五”国家科技重大专项“彭水地区常压页岩气勘探开发示范工程”(2016ZX05061);中国石化科技开发部项目“渝东南盆缘转换带页岩气富集主控因素研究”(P18057-2)

Microseismic monitoring technology of shale gas block in the southern part of Pingqiao

  • Xiaozhen HUANG ,
  • Hongtao GU
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  • 1. Research Institute of Exploration and Development, Sinopec East China Oil and Gas Company, Nanjing, Jiangsu 210011, China
    2. Nanchuan Shale Gas Project Department, Sinopec East China Oil and Gas Company, Chongqing 408400, China

Received date: 2019-03-01

  Online published: 2020-02-04

摘要

如何准确描述水平井水力压裂裂缝展布状态、储层改造体积、造缝主控因素是页岩气开发中一项关键技术。采用在邻井JY×-2中下放高精度检波器的方式对平桥南JY×-1页岩气井第10至15压裂段进行井中微地震监测。根据监测结果描述每段压裂施工的裂缝发育过程,分析6段压裂后裂缝的分布特征:主要以人工裂缝为主,半缝长250 m,宽210 m,高85 m;储层改造体积2 187×10 4 m 3,单段压裂区域有一定重合;主裂缝方向为北西60°,与最大主应力方向基本一致;压裂屏障是裂缝不对称发育的主控因素。结合三维地震曲率属性分析认为,储层内的天然闭合裂缝是压裂微裂缝延伸的屏障,影响压裂微裂缝延伸方向和长度的同时也会导致施工压力升高。

本文引用格式

黄小贞 , 谷红陶 . 井中微地震监测技术在平桥南页岩气区块应用效果分析[J]. 油气藏评价与开发, 2020 , 10(1) : 43 -48 . DOI: 10.13809/j.cnki.cn32-1825/te.2020.01.007

Abstract

How to accurately describe the distribution state of fractures formed by hydraulic fracturing in horizontal wells, the volume of reservoir transformation and the main control factors of fracture formation is one of the key technologies in shale gas development. Microseismic monitoring in the 10th to 15th fracturing section of shale gas well JY×-1 in the south of Pingqiao is carried out by means of devolving high precision geophone in adjacent well JY×-2. According to the monitoring results, the fracture development of each section of fracturing is described, and the distribution characteristics of fractures in six sections after fracturing. The main fractures are artificial fractures, whose half length is 250 m, width is 210 m, and height is 85 m. The stimulated reservoir volume(SRV) is 2 187×10 4 m 3. There is a certain coincidence in the single fracturing section. The main fracture direction is 60° north of east, which is basically consistent with the direction of the maximum principal stress. Fracturing barrier is the main factor of fracture asymmetry development. Combined with the analysis of 3D seismic curvature attribute, it is considered that the natural closed fracture in the reservoir is the barrier of micro-fracture extension, which affects the extension direction and length of micro-fracture, and also leads to the increase of construction pressure.

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