靖边油田新城区块延9油层组储层非均质性特征  

Reservoir heterogeneity characteristics of Yan9 oil formationin Xincheng Block, Jingbian Oilfield

作　　者：肖鄂[1] 程妮[1] 王政杰 马钰凯 白婷 井康康 XIAO E;CHENG Ni;WANG Zhengjie;MA Yukai;BAI Ting;JING Kangkang(Exploration&Development Technology Research Center of Yanchang Oilfield Co.,Ltd.,Yan′an 716000,Shaanxi,China)

机构地区：[1]延长油田股份有限公司勘探开发技术研究中心,陕西延安716000

出　　处：《石油地质与工程》2023年第6期15-20,28,共7页Petroleum Geology and Engineering

摘　　要：靖边油田新城区块延9油层组纵向发育多套砂体,水驱控制程度低。通过测井资料、岩心化验分析以及压汞实验等方法对区块非均质性特征展开研究,定性评价延9油层组储层非均质性并分析其成因。结果表明,中侏罗世初期河道沉积模式与规模决定储层平面展布,延9油层组储层呈北西-南东向条带状分布,孔隙度、渗透率分布与砂体展布及发育状况密切相关;通过分层系数、砂岩密度以及变异系数等非均质性参数计算,广泛而稳定发育的隔层加剧了层间非均质性,并对油气运移和聚集产生重要影响;储层各小层内夹层普遍发育但连续性差,渗透率韵律以复合韵律型(反-正韵律型和正-正复合韵律型)为主,延922小层非均质性较强。该结果可深化新城区块延9油层组储层特征认识,指导区块精细注水开发。Multiple sets of sand bodies are developed in Yan9 reservoir in Xincheng Block of Jingbian Oilfield,and the degree of water drive control is low.By using methods such as logging data,core analysis,and mercury intrusion experiments,the heterogeneity characteristics were studied,and the heterogeneity of the Yan9 reservoir was qualitatively evaluated and its genesis was briefly analyzed.The results show that the pattern and scale of channel deposition in the early Middle Jurassic determined the distribution of reservoir in plane.The Yan9 reservoir in Xincheng block of Jingbian oilfield is banded in the direction of northwest to southeast,and the distribution of porosity and permeability are closely related to the distribution and development status of sand bodies.Based on the calculation of heterogeneity parameters such as stratification coefficient,sandstone density and variation coefficient,extensive and stable interlayer increases the interlayer heterogeneity and has an important effect on hydrocarbon migration and accumulation.Intercalations are generally developed but have poor continuity in each small layer of the reservoir,permeability is dominated by reverse-positive rhythm and position-positive complex rhythm,and the Yan922 small layer has strong heterogeneity.The results can deepen the understanding of reservoir characteristics of Yan9 formation and provides guidance for fine waterflood development in the block.

关 键 词：靖边油田 延9油层组 非均质性 沉积特征 

分 类 号：P618.13[天文地球—矿床学]