摘要
本文综合运用扫描电镜、高压压汞以及油水相渗等多项实验技术方法,系统研究了喇嘛甸油田葡萄花油层的物性、微观孔隙结构及其对于渗流特征的影响作用。研究表明:①储层岩性主要为(岩屑)长石砂岩,平均孔隙度为33.1%,平均渗透率为2.47μm^(2),属于特高孔、特高—高渗储层;②储层孔隙类型包括原生、次生孔隙,并以次生溶蚀孔隙为主;微观孔隙结构特征表现为良好的分选性、连通性,孔喉半径平均为7.34μm,属于中—粗孔储层;③储层渗流能力良好,表现为束缚水、残余油饱和度较低,等渗点含水饱和度较高、油水两相区较为宽阔等特点;④相关性分析表明,储层物性、微观孔隙结构对于其渗流能力具有重要的影响作用。研究结果可为油田微观剩余油精细挖潜提供依据。
In this paper,a number of experimental techniques such as scanning electron microscopy,highpressure mercury intrusion and oil-water phase infiltration are used to systematically study the physical properties and microscopic pore structure of the Portugal Reservoir in Lamadian Oilfield and their effects on the seepage characteristics of the reservoir.The research shows that:(1)The lithology of the reservoir is mainly(cutting)feldspar sandstone,the average porosity is 33.1%,and the average permeability is 2.47μm^(2),which belongs to the ultra-high porosity,ultra-high-high permeability reservoir;(2)Reservoir pore types include primary and secondary pores,mainly secondary dissolution pores;microscopic pore structure has good sorting and connectivity characteristics,with an average pore throat radius of 7.34μm,belonging to medium-coarse pore reservoirs;(3)The reservoir seepage ability is good,which is characterized by low irreducible water and residual oil saturation,high water saturation at isotonic point,and wide oil-water two-phase zone;(4)Correlation analysis shows that the reservoir physical properties and microscopic pore structure play an important role in its seepage capacity.These research results can provide a basis for finely exploiting the microscopic remaining oil in the oilfield.
作者
张景军
孙嘉钥
曹艳芳
仲欣
李顺欣
ZHANG Jingjun;SUN Jiayue;CAO Yanfang;ZHONG Xin;LI Shunxin(Northeast Petroleum University,School of Geosciences,Daqing 163318,Helongjiang,China)
出处
《矿产勘查》
2023年第8期1402-1411,共10页
Mineral Exploration
基金
国家自然科学基金项目“泥页岩脆塑性主控因素及定量评价研究”(41472125)资助。
关键词
微观孔隙结构
渗流特征
葡萄花油层
喇嘛甸油田
micro-pore structure
seepage characteristics
Portugal Reservoir
Lamadian Oilfield
