XX地区长8中高电阻率储层出水原因分析

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英文篇名：Water-production Causation Analysis for Medium-high Resistivity Reservoir of Changba Formation in XX Area 作者：席辉 ; 张海涛 ; 林伟川 ; 张蕾 ; 肖飞 ; 吴有彬 ; 郭浩鹏 英文作者：XI Hui;ZHANG Haitao;LIN Weichuan;ZHANG Lei;XIAO Fei;WU Youbin;GUO Haopeng;China Petroleum Logging CO.LTD.;Exploration and Development Research Institute of Changqing Oilfield Company; 关键词：测井解释 ; 中高电阻率 ; 出水原因 ; 流体性质 ; 压裂 ; 核磁共振测井 英文关键词：log interpretation;;medium-high resistivity;;water-production causation;;fluid properties;;fracturing;;nuclear magnetic resonance logging 中文刊名：测井技术 英文刊名：Well Logging Technology 机构：中国石油集团测井有限公司;长庆油田勘探开发研究院; 出版日期：2019-02-20 出版单位：测井技术 年：2019 期：01 基金：中国石油天然气股份有限公司重大科技专项“复杂油气藏地震预测与测井识别技术研究”(2016E-0503) 语种：中文; 页：24-29 页数：6 CN：61-1223/TE ISSN：1004-1338 分类号：P631.81

摘要

鄂尔多斯盆地某地区长8储层为水下分流河道砂体,岩性以细-中粒岩屑长石砂岩为主,录井显示以油斑为主,测井电性显示为中高电阻率(30～150Ω·m),电性与油层相当,甚至好于油层,常规测井解释多为油层或油水层。但经过压裂改造后试油出水,测井解释符合率极低。利用地质、测井、分析化验和试油等资料,从储层岩心、物性、地层水、原油性质和润湿性等5方面开展了该区长8中高电阻率储层出水原因分析。形成了基于常规测井及核磁共振测井高电阻率储层流体性质判识技术,提高了长8储层测井解释符合率,在实际生产中应用效果显著。
        Chang 8 Formation developed underwater distributary channel sand body in an area of Ordos Basin. The lithology of the reservoir was mainly composed of fine-medium grained lithic argillaceous sandstone, the display of mud logging was dominated by oil spots, and the electricity characteristics of reservoirs was medium-high resistivity(30～150 Ω·m). This electrical characteristic was the same as the electrical characteristic of oil layer, even better than the oil layer, so the conventional log interpretation result of this kind of reservoirs were mostly the oil layer or oil-water layers. However, after fracturing and testing, the results shown that most of these reservoirs were water layers, and the log interpretation coincidence rate was very low. Based on the data of geology, logging, analysis test and oil test, this paper analyzes the causes of water production in high resistivity reservoirs in the Chang 8 Formation from 5 aspects, such as reservoir core, physical properties, formation water, crude oil properties and wetting property. According to the results of the analysis, the fluid identification technology of high resistivity reservoir based on conventional logging and NMR logging was formed in this paper. The technology improved the log interpretation coincidence rate of the Chang 8 reservoir greatly and has achieved remarkable application results in the actual production.

引文

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