摘要
目的探究永宁油田双805井区长6储层的特征及控制因素,为研究区科学有效的开采提供依据。方法在储层沉积相研究的基础上,运用岩心观察、铸体薄片、扫描电镜、压汞及测井等资料对储层进行综合分析。结果研究区长6储层岩性主要为细粒长石砂岩。储集空间以粒内溶孔及铸模孔为主,晶间微孔、晶内微孔次之;孔隙结构复杂,排驱压力、中值压力等参数明显偏高;储层物性较差,非均质性较强,属于中小孔微细喉型低渗、特低渗储层。结论研究区长6储层为受三角洲控制的岩性油藏,砂体分布受沉积微相展布控制,水下分流河道及河口坝复合发育的主砂带是渗透率较高区,也是油气分布富集的有利区带。
Aim To research the characteristics and control factors of Chang 6 Reservoir of Shuang 805 well area in Yongning Oil field,and direct scientific and effective exploitation.Methods Base on the study of reservoir sedimentary facies,a synthesis analysis is done on the characteristics of Chang 6 Reservoir by using observing cores,casting slices,scanning electron microscope,pressure mercury and logging data.Results The lithologic characteristics of Chang 6 Reservoir is mainly fine arkose.The granular solution pore and moldic pore are the main pore space of reservoir,the intergranular micropores and intragranular pore the secondary.Pore structure of Chang 6 Reservoir is complicated and the parameters of displacement pressure and median pressure are obviously higher.The physical property of reservoir is poor and heterogeneity is strong.Thus it belongs to low permeability,extra-low permeable reservoir of micro-fine throat type.Conclusion Chang 6 Reservoir is mainly lithologic oil reservoir,the distribution of sand is controlled by the sedimentary microfacies,the composite development main sand belt of underwater distributary channel and debouch bar is higher permeability,which is the favorable zones of oil and gas distribution.
出处
《西北大学学报（自然科学版）》
CAS
CSCD
北大核心
2012年第2期281-287,共7页
Journal of Northwest University（Natural Science Edition）
基金
教育部高校博士点专项科研基金资助项目(20116101110006)
国家留学基金西部计划基金资助项目(留出金2007-3045)
陕西省自然科学基础研究计划重点项目和留学人员科技活动择优资助经费基金资助项目(陕外专2010-26)
关键词
储层特征
控制因素
长6储层
永宁油田
鄂尔多斯盆地
reservoir characteristics
control factors
Chang 6 Reservoir of Yanchang formation
Yongning Oilfield
Ordos Basin
