四川泸州地区大深度页岩气水力压裂电磁监测的应用  

Application of Electromagnetic Monitoring in Hydraulic Fracturing of Large Depth Shale Gas in Luzhou Area,Sichuan Province

作　　者：曾波[1] 徐尔斯 杨扬 宋毅[1] 陈珂 王怡亭 徐颖洁 李宁[3] Zeng Bo;Xu Ersi;Yang Yang;Song Yi;Chen Ke;Wang Yiting;Xu Yingjie;Li Ning(Shale Gas Research Institute of Petro China Southwest Oil&Gasfield Company,Chengdu Sichuan 610051,China;PetroChina Southwest Oil and Gas Field Sichuan Changning Natural Gas Development Limited Liability Company,Chengdu Sichuan 610051,China;School of Geosciences and Info-Physics,Central South University,Changsha Hunan 410083,China)

机构地区：[1]中国石油西南油气田分公司页岩气研究院,四川成都610051 [2]中国石油西南油气田四川长宁天然气开发有限责任公司,四川成都610051 [3]中南大学地球科学与信息物理学院,湖南长沙410083

出　　处：《工程地球物理学报》2024年第1期12-21,共10页Chinese Journal of Engineering Geophysics

基　　金：湖南省科技创新计划项目(编号:2023RC1014);中国石油天然气集团有限公司西南油气田分公司院士合作项目(编号:XNS页岩院JS2021-39)。

摘　　要：电磁法在评估压裂液范围及裂缝形态时发挥着重要作用,在压裂监测中应用前景广泛。然而,对于川南地区的大深度页岩气水力压裂监测应用较少。为此,本文基于电磁监测理论,通过简化压裂模型进行数值模拟实验,在建立电磁监测技术的数据处理流程基础上,结合现场试验,从压裂液波及范围、用液强度、加砂强度、重复改造面积等多方面分析了压裂监测效果,进一步分析了电磁法进行水力压裂裂缝监测的有效性。其中,压裂监测段共计13段,获得各段波及面积4700~24042 m 2,波及宽度36~182 m,平均波及长度207 m。应用实例表明,电磁监测技术能实时了解压裂波及范围与展布形态,对压裂效果评价与施工参数的优化具有一定程度的指导意义。Hydraulic fracturing increases the reservoir permeability and has greatly improved the productivity of low permeability oil and gas reservoirs through reservoir reconstruction,but the evaluation of fracturing effect is a key to the productivity improvement.Sensitive to the change of underground low resistance bodies,electromagnetic method plays an important role in assessing the extent of fracturing fluids and fracture morphology,thus has a wide application prospect in hydraulic fracturing monitoring.However,it is rarely applied in hydraulic fracturing monitoring of large depth shale gas in southern Sichuan.In order to promote the wider application of electromagnetic monitoring technology,this paper illustrates the monitoring effect of electromagnetic monitoring technology combined with examples.Based on the electromagnetic monitoring theory,this paper conducts numerical simulation experiments by simplifying the fracturing model,analyzes the fracturing monitoring effect combining the field test with the data processing flow of electromagnetic monitoring technology from many aspects such as the spread range of fracturing fluid,the strength of used fluid,the strength of sand addition,and the area of repeated reconstruction,among which,the fracturing monitoring segments totals 13,and the spread area of each segment ranges from 4700 to 24042 m 2,the spread width ranges from 36 to 182 m,and the average spread length is 207 m.The results show that,electromagnetic monitoring technology can detect the spread range and distribution pattern of fracturing in real time,which has some guiding significance for the evaluation of fracturing effect and the optimization of construction parameters.

关 键 词：水力压裂 电磁监测 大深度 效果评价 

分 类 号：P631.3[天文地球—地质矿产勘探]