基于残余岩溶强度表征和裂缝预测的碳酸盐岩储层评价——以塔中西部上奥陶统良里塔格组为例  

Evaluation of Carbonate Reservoir Based on Residual Karst Intensity Characterization and Structural Fracture Prediction:A Case from the Upper Ordovician Lianglitage Formation in the West of Center Tarim Basin

作　　者：赵永刚[1] 陈景山[2] 李凌[2] 古永红 张春雨 张栋梁[1] 张文强 周通 

机构地区：[1]西安石油大学地球科学与工程学院,西安710065 [2]西南石油大学资源与环境学院,成都610500 [3]中石油长庆油田分公司油气工艺研究院,西安710018 [4]中石油长庆油田分公司第四采气厂,西安710021

出　　处：《吉林大学学报（地球科学版）》2015年第1期25-36,共12页Journal of Jilin University：Earth Science Edition

基　　金：中国石油科技创新基金研究项目(2011D-5006-0103);陕西省教育厅专项科研计划项目(14JK1567);西安石油大学博士科研启动项目(207003);国家科技重大专项计划项目(2011ZX05044-3);国家自然科学基金面上项目(41372118)

摘　　要：我国目前在碳酸盐岩油气勘探阶段常用的储层分类评价标准已难以满足溶蚀孔洞缝广泛存在及构造裂缝发育的古岩溶储层评价的实际需要。选择塔中西部上奥陶统良里塔格组古岩溶储层,在系统分析储层特征的基础上,通过表征残余岩溶和开展构造裂缝预测,引入残余岩溶强度(R)和岩体破坏接近度系数(η)2个参数,作为古岩溶储层评价的重要定量指标;并与多项储层地质参数综合,进一步完善了碳酸盐岩古岩溶储层的分类评价标准,并用于对该地区良里塔格组叠加型古岩溶储层的评价预测。将本区良里塔格组古岩溶储层划分为Ⅰ、Ⅱ、Ⅲ、Ⅳ4类,并应用多因素综合分析叠合成图法在平面上进行储层评价预测,认为Ⅰ、Ⅱ类储层主要分布于S2井—TZ45井—TZ12井一带和Z11井—TZ10井—TZ11井一带。At present,because of the wide existence of karst genetic pore,cave and seam and the development of structural fractures,usual standards of reservoir classification and evaluation have been difficulties to meet the actual needs of palaeokarst reservoir evaluation in china.Palaeokarst reservoir of the Upper Ordovician Lianglitage Formation in the west of center Tarim basin is studied.The reservoir characteristics are analysed systematically firstly.Then,by characterizing residual karst and predicting structural fractures,residual karst intensity（R）and rock failure approach index coefficient（η）are chosen as the important quantitative indexes of palaeokarst reservoir evaluation.Combining Randη with the relevant parameters of reservoir geology,a better standard of carbonate reservoir classification and evaluation is established,which is used for evaluation and prediction of superimposed type palaeokarst reservoir of Lianglitage Formation in the west of center Tarim basin.Palaeokarst reservoir of Lianglitage Formation is divided into 4types：Ⅰ,Ⅱ,Ⅲ,Ⅳ.The palaeokarst reservoir is evaluatedand predicted by applying multi factors synthetical analysis-Laminate maps method.Ⅰ,Ⅱtype of the palaeokarst reservoir mainly distributed in Well S2-Well TZ45-Well TZ12 area and in Well Z11-Well TZ10-Well TZ11 area.

关 键 词：残余岩溶强度 构造裂缝 叠合成图 良里塔格组 塔中西部 

分 类 号：P588.245[天文地球—岩石学] P618.13[天文地球—地质学]