准噶尔盆地玛西斜坡八道湾组一段厚层砂砾岩储层评价及强非均质控藏特征  

Thick Glutenite Reservoir Evaluation and Strong Heterogeneous Quality Control Reservoir Characteristics of the First Member of Badaowan Formation in Maxi Slope,Junggar Basin

作　　者：齐洪岩 李小石 王智忠[1] 王爱霞[1] 赵晓东 QI Hong-yan;LI Xiao-shi;WANG Zhi-zhong;WANG Ai-xia;ZHAO Xiao-dong(Exploration and Development Research Institute,Xinjiang Oilfield Company,CNPC,Karamay 834000,China;School of Petroleum,China University of Petroleum(Beijing)at Karamay,Karamay 834000,China)

机构地区：[1]中国石油新疆油田公司勘探开发研究院,克拉玛依834000 [2]中国石油大学(北京)克拉玛依校区石油学院,克拉玛依834000

出　　处：《科学技术与工程》2024年第23期9718-9728,共11页Science Technology and Engineering

基　　金：新疆维吾尔自治区自然科学基金(2021D01F39);克拉玛依市创新环境建设计划(创新人才)项目(20232023hjcxrc0049)。

摘　　要：准噶尔盆地侏罗系是增储上产的主力层系,其中玛湖凹陷西斜坡(简称“玛西斜坡)侏罗系八道湾组一段主要为低孔低渗砂砾岩储层,玛西斜坡同一套储层(构造、沉积、成岩条件类似)有的成藏、有的未成藏,亟需开展砂砾岩储层评价,明确控藏特征。利用岩心、薄片、分析化验、试油试产等资料,进行玛西斜坡八道湾组一段厚层砂砾岩储层评价,重点开展储层非均质评价明确非均质控藏特征。研究结果表明:①玛西斜坡八道湾组一段主要发育厚层砂砾岩储层,为辫状河道沉积,储层中主要发育泥质、致密砂岩层、钙质与煤层等4种隔夹层,隔夹层在纵向上增强了储层非均质性;②玛西斜坡八道湾组一段储层孔隙度分布范围2.9%~18.8%,平均孔隙度为10.60%,渗透率分布范围是0.02×10^(-3)~255×10^(-3)μm^(2),平均渗透率为3.29×10^(-3)μm^(2),其中砂砾岩储层孔隙度分布范围4.1%~15.8%,平均为8.27%,渗透率分布范围是0.05×10^(-3)~145×10^(-3)μm^(2),平均值1.24×10^(-3)μm^(2),属于特低孔特低渗储层,储层具有孔喉半径较小,孔隙结构复杂,喉道连通性较差,排驱压力高的特征;③建立起储集空间与含油性的关系,储集空间发育、非均质性弱的层段含油性差,而储集空间弱发育、非均质性强的层段含油性好,储层非均质性是控制准噶尔盆地玛西斜坡八道湾组厚层砂砾岩储层油气成藏的主控因素;④利用数据包络法计算了玛西斜坡八道湾组一段厚层砂砾岩储层非均质指数,主要介于0.621~0.782,属于较强—中等非均质性。试油出油层段储层非均质指数为0.621~0.673,为较强非均质性储层,试油未或少出油层段储层非均质指数为0.674~0.782,为中等非均质性储层。结论认为储层非均质性对玛西斜坡八道湾组一段厚层砂砾岩储层油气成藏具有控制作用,强非均质储层中油气难以逸散而得到保存,油藏主要富集在强非均质储�The Jurassic in the Junggar Basin is the main stratum for increasing reserves and production.Among them,the first member of the Jurassic Badaowan Formation in the western slope of the Mahu Sag(hereinafter referred to as the“Maxi slope”)is mainly a low-porosity and low-permeability glutenite reservoir.The same set of reservoirs in the Maxi slope(similar tectonic,sedimentary and diagenetic conditions)have some accumulations and some have not been accumulated.It is urgent to carry out glutenite reservoir evaluation and clarify the characteristics of reservoir control.Based on the data of core,thin section,analytical test,oil test and production test,the evaluation of thick glutenite reservoir in the first member of Badaowan Formation in Maxi slope was carried out,and the reservoir heterogeneity evaluation was carried out to clarify the characteristics of non-quality control reservoir.The results show these as follows.The first member of the Badaowan Formation in the Maxi slope mainly develops thick glutenite reservoirs,which are braided channel deposits.There are four kinds of interlayers in the reservoir,including argillaceous,tight sandstone,calcareous and coal seams.The interlayers enhance the heterogeneity of the reservoir vertically.The porosity distribution range of the first member of Badaowan Formation in Maxi slope is 2.9%~18.8%,and the average porosity is 10.60%.The permeability distribution range is 0.02×10^(-3)~255×10^(-3)μm^(2),and the average permeability is 3.29×10^(-3)μm^(2).The porosity distribution range of glutenite reservoir is 4.1%~15.8%,and the average porosity is 8.27%.The permeability distribution range is 0.05×10^(-3)~145×10^(-3)μm^(2),and the average permeability is 1.24×10^(-3)μm^(2).The reservoir has the characteristics of small overall pore throat radius,complex pore structure,poor throat connectivity,high displacement pressure and low displacement efficiency.The relationship between reservoir space and oil-bearing property is established.The intervals with developed reserv

关 键 词：准噶尔盆地 玛湖凹陷西斜坡 砂砾岩储层 储层非均质性 非均质指数 

分 类 号：TE122.1[石油与天然气工程—油气勘探]