海相页岩气储层评价发展趋势与综合评价体系  

Development trend of marine shale gas reservoir evaluation and a suitable comprehensive evaluation system

作　　者：蒋裕强[1,2] 付永红 谢军[3] 董大忠 周克明[3] 程晓艳[5] 漆麟[6] 张海杰 陈超 马廷虎 谷一凡[1] Jiang Yuqiang;Fu Yonghong;Xie Jun;Dong Dazhong;Zhou Keming;Cheng Xiaoyan;Qi Lin;Zhang Haijie;Chen Chao;Ma Tinghu;Gu Yifan(School of Geosciences and Technology,Southwest Petroleum University,Chengdu,Sichuan 610500,China;Unconventional Reservoir Evaluation Laboratory,UOGKL,CNPC,Chengdu,Sichuan 610500,China;PetroChina Southwest Oil&Gasfield Company,Chengdu,Sichuan 610051,China;PetroChina Research Institute of Petroleum Exploration and Development,Langfang,Hebei 065007,China;Sichuan Shale Gas Exploration and Development Co.,Ltd.,Chengdu,Sichuan 610051,China;Geological Exploration and Development Research Institute,CNPC Chuanqing Drilling Engineering Co.,Ltd.,Chengdu,Sichuan 610051,China;Chongqing Shale Gas Exploration and Development Co.,Ltd.,Chongqing 610213,China)

机构地区：[1]西南石油大学地球科学与技术学院 [2]中国石油非常规油气重点实验室储层评价实验室 [3]中国石油西南油气田公司 [4]中国石油勘探开发研究院 [5]四川页岩气勘探开发有限责任公司 [6]中国石油川庆钻探工程公司地质勘探开发研究院 [7]重庆页岩气勘探开发有限责任公司

出　　处：《天然气工业》2019年第10期1-9,共9页Natural Gas Industry

基　　金：国家自然科学基金项目“页岩储层纳米孔隙结构表征及渗流机理研究”（编号：51674044）;四川省应用基础研究项目“海相页岩气建产核心区智能评价系统研究（省重）”（编号：2019YJ0346）;四川省苗子工程重点项目“基于压裂液返排规律评价页岩气储层压裂效果的方法研究”（编号：2019JDRC0095）;高等学校学科创新引智计划（111计划）“深层海相页岩气高效开发学科创新引智基地”（编号：D18016）

摘　　要：目前,我国页岩气勘探开发中还存在着储层有效性评价体系不完善、储层评价体系不能满足页岩气高效开发需要等问题。为了完善储层评价内容与标准,基于现有的页岩气储层评价方法,分析页岩气储层静态评价的不足及其面临的挑战,建立了页岩气储层有效性评价方法和孔隙系统划分方案;在此基础上,探讨了页岩压后动态评价参数及其对排采措施的影响,研究了“自动缓解水锁”潜力评价参数,建立了“静—动”结合的储层综合评价体系。研究结果表明:①页岩气储层评价的新挑战表现为“储层有效性、压后动态评价参数体系、压后排采措施”研究不够深入,导致现有的页岩气储层评价体系相对于生产具有严重的滞后性;②储层有效性评价主要表现为有效孔隙度下限评价,体现在黏土矿物束缚水和不连通孔隙对页岩气开发的影响;③页岩气储层评价发展趋势表现为细化储层静态评价参数、建立“自动缓解水锁”潜力评价指标和“静—动”结合的储层综合评价体系;④确定了“润湿性、吸水滞留能力、吸水膨胀方式、膨胀率和吸水产生裂缝能力”等“自动缓解水锁”潜力评价指标的压后动态评价体系;⑤提出了“页岩气储层静态评价是基础,压后动态评价是补充”的储层评价思路,并建立了一套适合我国海相页岩气储层评价的“静—动”结合的储层综合评价体系。At present,shale gas exploration and development in China is faced with some problems,such as the imperfect evaluation system of reservoir effectiveness and the limitations of reservoir evaluation system on efficient development of shale gas.In order to improve the content and the standard of reservoir evaluation,this paper analyzed the shortcomings and challenges in the static evaluation of shale gas reservoirs on the basis of existing reservoir evaluation,and established a method for evaluating shale gas reservoir effectiveness and a scheme for classifying pore systems.Then,the dynamic evaluation parameters after shale fracturing and their effects on drainage and production measures were discussed.In addition,the potential evaluation parameters of"automatic mitigating water blocking"were studied,and a comprehensive reservoir evaluation system of"static–dynamic"combination was established.And the following research results were obtained.First,new challenges to the shale gas reservoir evaluation are emerged as the lack of in-depth study on"reservoir effectiveness,dynamic evaluation parameter system after fracturing and drainage and production measures after fracturing",which leads to the serious lag of existing shale gas reservoir evaluation system behind production.Second,The evaluation of reservoir effectiveness is mainly presented as the evaluation on the lower limit of effective porosity,and is embodied in the influence of clay bound water and unconnected pores on the development of shale gas.Third,the development of shale gas reservoir evaluation follows the trend of refining the static reservoir evaluation parameters,defining the potential evaluation indexes of"automatic mitigating water blocking"and establishing the reservoir comprehensive evaluation system of"static–dynamic"combination.Fourth,a postfrac dynamic evaluation system is determined for the potential evaluation indexes of"automatic mitigating water blocking"(e.g.wettability,water imbibition retention capacity,water imbibition expansion mode,

关 键 词：页岩气 储集层有效性 压后动态参数 “自动缓解水锁”潜力 “静—动”结合 储集层综合评价体系 

分 类 号：P61[天文地球—矿床学]