利用微地震识别水力压裂井旁天然裂缝

doi:10.13810/j.cnki.issn.1000-7210.2018.S2.022

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摘要页岩各向异性强、天然裂缝发育，水力压裂时容易发生套管形变而影响施工进度，利用微地震监测技术可识别造成套管形变的天然裂缝的空间位置，采取工程技术措施，降低施工风险。本文介绍了天然裂缝触发微地震事件的震级、能量、时空分布特征，分析了四川页岩气一口水平井开发水力压裂诱发的微地震事件，施工现场准确地定位出井旁微小天然裂缝的走向和位置，压裂技术人员及时调整施工参数，避免了套管严重形变影响水力压裂进程，为页岩气开发发挥了较好的现场指导作用。

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	储仿东
	焦亚军
	杨立峰
	刘腾蛟
	衡峰

关键词 ：页岩, 微地震, 天然裂缝, 震级, 套管形变

Abstract：Hydraulic fracturing in shale is usually prone to casing deformation because shale is characterized by strong anisotropy and many tiny-natural fractures.Microseismic can identify positions of these natural fractures.This paper presents one example of this identification.The seismic magnitude,energy,and spatial-temporal features of microseismic events in natural fractures are discussed.Microseismic events from a hydraulic-fracturing horizontal well in Sichuan are analyzed.Natural fractures are accurately predicted on-site and then fracturing parameters are optimized to avoid further casing deformation.Our practice shows that microseismic monitoring has played a guiding role in hydraulic fracturing operations.

Key words： shale microseismic natural fracture seismic magnitude casing deformation

收稿日期: 2018-08-01

PACS:

P631

基金资助:本项研究受国家科技重大专项“油藏及非常规气藏地球物理配套技术”（2017ZX05018）资助。

通讯作者: 储仿东,河北省涿州市甲秀路39号科技楼A座东方地球物理公司新兴物探处1003室,072750。Email:chufangdong@cnpc.com.cn E-mail: chufangdong@cnpc.com.cn

作者简介: 储仿东,高级工程师,1972年生;1997年毕业于江汉石油学院勘察地球物理专业,获学士学位;现就职于东方地球物理公司新兴物探开发处,主要从事微地震监测研究。

引用本文:

储仿东, 焦亚军, 杨立峰, 刘腾蛟, 衡峰. 利用微地震识别水力压裂井旁天然裂缝[J]. 石油地球物理勘探, 2018, 53(s2): 143-147. CHU Fangdong, JIAO Yajun, YANG Lifeng, LIU Tengjiao, HENG Feng. Natural fracture identification at hydraulic fracturing wells with microseismic. Oil Geophysical Prospecting, 2018, 53(s2): 143-147.

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http://www.ogp-cn.com/CN/10.13810/j.cnki.issn.1000-7210.2018.S2.022 或 http://www.ogp-cn.com/CN/Y2018/V53/Is2/143

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