AH5井区八道湾组砂质和砾质储层孔隙结构特征及评价  

Evaluation and Characteristics of Pore Structures in Sand and Conglomerate Reservoirs of Badaowan Formation in the AH5 Well Block

作　　者：刘文锋 张小栓 刘谨铭 艾力曼·道尔吉 杨远峰 张曦文 祁利祺 于景维 LIU Wenfeng;ZHANG Xiaoshuan;LIU Jinming;AILIMAN·Daoerji;YANG Yuanfeng;ZHANG Xiwen;QI Liqi;YU Jingwei(The Baikouquan Oil Production Plant of Xinjiang Oilfield Company,Karamay,Xinjiang 834000,China;China University of Petroleum(Beijing)at Karamay,Karamay,Xinjiang 834000,China)

机构地区：[1]新疆石油分公司百口泉采油厂,新疆克拉玛依834000 [2]中国石油大学(北京)克拉玛依校区,新疆克拉玛依834000

出　　处：《现代地质》2021年第6期1844-1853,共10页Geoscience

基　　金：新疆维吾尔自治区科技厅自然科学面上基金项目(2021D01A201);国家科技重大专项(2011ZX05001-005-01);中国石油大学(北京)克拉玛依校区人才引进项目(RCYJ2016B-01-010)。

摘　　要：准噶尔盆地AH区块侏罗系八道湾组属于低饱和度、特低孔特低渗储层,孔隙结构研究较为模糊,导致储集层产能评价认识不清。为对研究区目的层孔隙结构进行定量化描述及识别,利用岩心观察、普通、荧光、铸体薄片、扫描电镜、高压压汞、岩心油水饱和度、相渗及物性分析等资料对孔隙结构复杂特征进行定量表征及分类,并对相渗特征进行分析。结果表明:八道湾组储层可分为砂质和砾质储层,储层孔隙类型包括剩余粒间孔、粒间和粒内溶孔、铸模孔、微裂缝以及晶间孔,喉道类型包括孔隙缩小型、缩颈型、片状、片弯状以及管束状喉道。在油水饱和度实验分析和压汞基础参数分析基础上,将砂岩和砾岩储层根据分形维数对孔隙结构综合定量划分为Ⅰ—Ⅲ类,砾质储层产能相对砂质储层更好。The Jurassic Badaowan Formation hosts low-porosity and low-permeability reservoirs with low oil saturation in Block AH of the Junggar Basin. Pore structure of the oil reservoirs is poorly understood, which hampers reservoir deliverability evaluation. Core investigation, common, fluorescence and cast sections, SEM, high-pressure mercury intrusion, oil-water saturation of core and phase permeability experiments were integrated to quantitatively characterize and classify pore structures, and analyze the relative permeability characteristics. The results show that the reservoirs can be divided into sand and conglomerate reservoirs, and the pore structures comprise residual intergranular pores, intergranular/intragranular dissolved pores, mold pores, micro-fractures and intercrystalline pores. Throat types comprise scaled down version pores, necked pores, flake, curved and tube bundle throats. On the basis of oil-water saturation experiments and basic parameters for mercury injection, pore structures of the sand and conglomerate reservoirs are divided into three types, and the production capacity of conglomerate reservoirs is higher than that of sand reservoirs.

关 键 词：孔隙结构 定量表征 分类 八道湾组 AH5井区 

分 类 号：TE122.2[石油与天然气工程—油气勘探]