渝东武隆–石柱地区中上寒武统白云岩储层特征及分类评价  

Characteristics and classification evaluation of middle-upper Cambrian dolomite reservoirs in Wulong-Shizhu area, eastern Chongqing

作　　者：斯尚华 李建明[3] 李旭[1] 闫冠宇 何望雪 SI Shanghua;LI Jianming;LI Xu;YAN Guanyu;HE Wangxue(School of Earth Resource Sciences and Engineering,Xi'an Petroleum University,Xi'an,Shaanxi 710065,China;Key Laboratory of Hydrocarbon Accumulation Geology,Xi'an Petroleum University,Xi'an,Shaanxi 710065,China;School of Earth Science,Yangtze University,Wuhan,Hubei 434023,China)

机构地区：[1]西安石油大学地球科学与工程学院,陕西西安710065 [2]西安石油大学陕西省油气成藏地质学重点实验室,陕西西安710065 [3]长江大学地球科学学院,湖北武汉434023

出　　处：《石油地质与工程》2019年第5期21-25,共5页Petroleum Geology and Engineering

基　　金：陕西省自然科学基础研究计划“致密油气运移特征精细研究–以齐家凹陷高台子油层为例”(2019JM–055)

摘　　要：采用野外观察、铸体薄片、流体包裹体、电子探针及物性测试等手段,对渝东武隆–石柱地区中上寒武统储层进行详细描述和评价。结果表明,该区中上寒武统储层岩石类型以结晶云岩、颗粒云岩和藻白云岩为主,白云岩储层孔隙度为0.38%~12.70%,平均值为3.06%;渗透率为0.060×10^-3~68.000×10^-3μm^2,平均值为1.920×10^-3μm^2,为低孔、低渗储层。针对该区储层特征的复杂性,综合选取孔隙度、储层厚度等参数,采用聚类分析法,将储层分为两种类型,一类为渝东石柱双流坝中寒武统有利储层发育段,另外一类为渝东武隆黄草中上寒武统及石柱双流坝上寒武统储层欠发育段。By means of outcrops,casting thin section,fluid inclusion and electron probe,and physical property test,the characteristics of middle-upper Cambrian reservoirs in Wulong-Shizhu area,eastern Chongqing were described and evaluated.The results show that the reservoir rock types of middle-upper Cambrian in WulongShizhu area in eastern Chongqing are mainly crystalline dolomite,granular dolomite and algal dolomite.The porosity range of dolomite reservoir is 0.38%~12.70%,with an average value of 3.06%,and the permeability range is 0.060×10^-3~68.000×10^-3μm^2,with an average value of 1.920×10^-3μm^2.The reservoir is characterized by low porosity and low permeability.In view of the complexity of reservoir characteristics in this area,by using cluster analysis method,the reservoirs are divided into two types.One is the favorable reservoir development of middle Cambrian in Shizhu-Shuangliuba in eastern Chongqing,and the other is the underdeveloped reservoir sections of middle-upper Cambrian in Huangcao,Wulong,eastern Chongqing and upper Cambrian in Shizhu-Shuangliuba.

关 键 词：渝东地区 中上寒武统 白云岩 储层特征 

分 类 号：TE112.222[石油与天然气工程—油气勘探]