基于井中微地震监测方法的压裂效果评价——以吉林探区Y22井为例

doi:10.12108/yxyqc.20200218

岩性油气藏 ›› 2020, Vol. 32 ›› Issue (2): 161–168.doi: 10.12108/yxyqc.20200218

基于井中微地震监测方法的压裂效果评价——以吉林探区Y22井为例

赵超峰¹, 贾振甲², 田建涛¹, 高荣锦³, 张伟¹, 赵建宇¹

1. 中国石油集团东方地球物理勘探有限责任公司辽河物探分公司, 辽宁盘锦 124010;
2. 中国石油吉林油田公司非常规资源开发公司, 吉林松原 138000;
3. 中国石油辽河油田分公司勘探开发研究院, 辽宁盘锦 124010

收稿日期:2019-08-21 修回日期:2019-10-29 出版日期:2020-03-21 发布日期:2020-01-19
作者简介:赵超峰(1991-),男,工程师,主要从事微地震压裂监测和井中地震技术方面的研究工作。地址:(124010)辽宁省盘锦市兴隆台区物探公司研究所。Email:1120201698@qq.com。

Fracturing effect evaluation based on borehole microseismic monitoring method: a case study from well Y22 in Jilin exploration area

ZHAO Chaofeng¹, JIA Zhenjia², TIAN Jiantao¹, GAO Rongjin³, ZHANG Wei¹, ZHAO Jianyu¹

1. Liaohe Geophysical Exploration Company, Bureau of Geophysical Prospecting INC., CNPC, Panjin 124010, Liaoning, China;
2. Unconditional Resource Development Corporation, PetroChina Jilin Oilfield Company, Songyuan 138000, Jilin, China;
3. Research Institute of Exploration and Development, PetroChina Liaohe Oilfield Company, Panjin 124010, Liaoning, China

Received:2019-08-21 Revised:2019-10-29 Online:2020-03-21 Published:2020-01-19

摘要/Abstract

摘要： 储层水力压裂效果评价对指导油气田精细开发具有重要意义，为准确评价压裂效果，提出了一套井中微地震监测压裂效果评价方法，在准确定位微地震事件基础上，分析微地震事件时空分布特征，剔除无效事件，利用有效事件定量描述缝网长、宽、高、走向、改造体积等，再结合储层性质、压裂施工参数等解释裂缝产生的原因，客观地评价压裂效果。该方法在吉林探区Y22井的应用结果表明：压裂裂缝走向与其周边小断层或天然裂隙走向一致；测井解释成果和微地震监测结果具有相关性，测井解释好的压裂段储层改造体积相对较大、微地震事件数量相对较多、裂缝复杂度更高；压裂过程中产生的离散微地震事件为压力传导造成低应力区应力释放产生的事件，不是由压裂窜层造成；Y22井周边的生产井因前期压裂改造和后期油气排采引起的地层能量亏空，造成了压裂裂缝的不对称性。该研究成果在解释微地震事件时空分布特征，提高对压裂和储层性质认识，客观、准确地评价压裂效果等方面具有指导作用。

关键词: 微地震监测, 压裂评价, 储层特征, 压裂参数, 油田开发, 不对称性

Abstract: Evaluation of reservoir hydraulic fracturing effect is of great significance for guiding the fine development of oil and gas fields. In order to accurately evaluate the fracturing effect,a fracturing effect evaluation method of microseismic monitoring in wells was proposed. On the basis of accurately locating microseismic events,the temporal and spatial distribution characteristics of microseismic events were analyzed,ineffective microseismic events were eliminated,the length,width,height,trend,reconstruction volume of fracture network were quantitatively described by using effective events,and fracturing effect was objectively evaluated by explaining the causes of fractures in combination with reservoir properties and fracturing operation parameters. The application results of well Y22 in Jilin exploration area show that the fracturing fracture strike is consistent with that of surrounding small faults or natural fissures. The results of log interpretation and microseismic monitoring are correlated,and the fractured reservoir with better log interpretation has relatively greater fracturing volume,more microseismic events and higher fracture complexity. The discrete microseismic events during fracturing are irrelevant to the fracture channeling layer but result from stress release in the low stress area that caused by pressure transmission. The formation energy deficit of other wells around well Y22 caused by primary fracturing and later production of oil and gas results in the asymmetry of the fracturing fractures in well Y22. The research results can be used to explain the temporal and spatial distribution characteristics of microseismic events,improve the understanding of fracturing and reservoir properties, and evaluate the fracturing effect objectively and accurately.

Key words: microseismic monitoring, fracturing evaluation, reservoir characteristics, fracturing parameters, oil field development, asymmetry

中图分类号:

TE357.1

赵超峰, 贾振甲, 田建涛, 高荣锦, 张伟, 赵建宇. 基于井中微地震监测方法的压裂效果评价——以吉林探区Y22井为例[J]. 岩性油气藏, 2020, 32(2): 161–168.

ZHAO Chaofeng, JIA Zhenjia, TIAN Jiantao, GAO Rongjin, ZHANG Wei, ZHAO Jianyu. Fracturing effect evaluation based on borehole microseismic monitoring method: a case study from well Y22 in Jilin exploration area[J]. Lithologic Reservoirs, 2020, 32(2): 161–168.

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基于井中微地震监测方法的压裂效果评价——以吉林探区Y22井为例

Fracturing effect evaluation based on borehole microseismic monitoring method: a case study from well Y22 in Jilin exploration area

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