玛湖1井区致密砂砾岩储层物性特征及其对流体可动性的影响  

Physical Properties of Tight Glutenite Reservoirs in Mahu 1 Wellblock and Their Effects on Fluid Mobility

作　　者：刘赛 吴建邦 周伟 杨胜来[2] 甘博文 赵帅[2] 赵彬彬 LIU Sai;WU Jianbang;ZHOU Wei;YANG Shenglai;GAN Bowen;ZHAO Shuai;ZHAO Binbin(Experiment and Detection Research Institute of Xinjiang Oilfield Company/Key Laboratory of Xinjiang Uygur Autonomous Region for Conglomerate Reservoir,Karamay,Xinjiang 834000,China;State Key Laboratory of Petroleum Resources and Prospecting/Key Laboratory of Ministry of Education for Petroleum Engineering,China University of Petroleum(Beijing),Beijing 102249,China)

机构地区：[1]新疆油田公司实验检测研究院/新疆维吾尔自治区砾岩油气藏重点实验室,新疆克拉玛依834000 [2]中国石油大学(北京)油气资源与探测国家重点实验室/石油工程教育部重点实验室,北京102249

出　　处：《西安石油大学学报（自然科学版）》2023年第6期15-23,共9页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：国家自然科学基金(51774300);国家油气重大专项(2017ZX05070);新疆砾岩油藏实验室开放性项目(2020D04045)。

摘　　要：为深入研究玛湖1井区致密砂砾岩物性特征及其对流体可动性的影响,采用铸体薄片、扫描电镜、高压压汞、核磁共振-离心等实验方法,系统分析岩矿特征、物性、孔隙类型、孔隙结构、流体可动性及其影响因素。结果表明:玛湖1井区致密砂砾岩储层平均孔隙度8.31%,渗透率3.46×10^(-3)μm^(2),上乌尔禾组储层渗透性和含油性好,排驱压力低,微米级孔喉充分发育,属于Ⅰ类储层;百口泉组储层孔隙含量高,亚微米级孔喉占优势,属于Ⅱ类储层;下乌尔禾组储层孔渗较低,排驱压力高,纳米级孔喉集中发育,属于Ⅲ类储层。岩心可动孔隙半径下限平均为0.069μm,可动流体饱和度平均为31.04%。流体可动性影响因素为物性、孔喉均质性、迂曲度、平均孔喉半径、最大孔径及胶结程度。研究结果为致密砂砾岩储层认识和有效开发提供了理论参考。In order to deeply study the physical properties of tight glutenite in Mahu 1 wellblock and their influences on fluid mobility,the rock and mineral characteristics,physical properties,pore types,pore structure,fluid mobility of the tight glutenite in the study area and the influencing factors of fluid mobility are systematically studied by means of casting thin sections,scanning electron microscopy,high-pressure mercury intrusion,nuclear magnetic resonance-centrifugation experiment,etc.The results show that the average porosity of the tight glutenite reservoir in Mahu 1 wellblock is 8.31%,and the average permeability is 3.46×10^(-3)μm^(2).Upper Urho Formation reservoir has good permeability,oil-bearing property and low displacement pressure,and micron pore throat is developed,which belongs to Class I reservoir.Baikouquan Formation reservoir has high porosity,and submicron pore throat is dominant,which belongs to Class II reservoir.Lower Urho Formation reservoir has low porosity,low permeability and high displacement pressure,and nano-scale pore throat is concentratedly developed,which belongs to Class III reservoir.The average lower limit of movable pore radius of cores is 0.069μm,and the average saturation of movable fluid is 31.04%.The influencing factors of fluid mobility are physical properties,pore throat homogeneity,tortuosity,average pore throat radius,maximum pore diameter and cementation degree.The research results provide reference for understanding and effective development of tight glutenite reservoir.

关 键 词：致密砂砾岩 物性特征 孔隙结构 流体可动性 影响因素 

分 类 号：TE348[石油与天然气工程—油气田开发工程]