姬塬油田长4+5低渗储层特征及成因分析  

Characteristics and genetic analysis of Chang 4+5 low permeability reservoirs in Jiyuan oilfield

作　　者：翟利华[1,2] 鲍志东[1,2] 沈佳男[1,2] 林艳波[3] 高银山[3] 郑锡[3] 焦滔[3] 胡泽泉 

机构地区：[1]中国石油大学(北京)地球科学学院,北京102249 [2]中国石油大学(北京)油气资源与探测国家重点实验室,北京102249 [3]中国石油长庆油田分公司第五采油厂,陕西西安710021

出　　处：《石油化工应用》2017年第6期113-117,共5页Petrochemical Industry Application

摘　　要：为了研究姬塬油田长4+5低渗储层特征及成因,综合利用薄片、扫描电镜、压汞及常规物性等分析化验资料,分析储层的岩石学特征、孔隙类型、孔隙结构及物性特征,并从沉积和成岩作用等方面探讨低渗储层的成因。研究结果表明,姬塬油田长4+5低渗储层形成于三角洲前缘低能沉积环境,岩性以成熟度低的岩屑质长石砂岩为主,孔隙类型主要为粒间孔和粒内溶孔,孔喉结构表现为细孔微喉,属于低孔-特低渗储层。储层特征主要受控于沉积作用和成岩作用,沉积环境通过控制储集岩的成分、结构决定储层原始物性。成岩作用是影响储层物性的后天因素和决定性因素,压实和胶结作用是储层低渗的主要原因,溶蚀作用对储层有一定的改善作用。To study characteristic and genetic of Chang 4＋5 low permeability reservoirs in Jiyuan oil_field, we studied the lithological characteristics, porosity types, porosity structure, and physical property of reservoir, and discussed the genetic analysis of low permeability reservoirs from sedimentary and diagenesis based on thin section, scanning electron （SEM）, mercury injection and other conventional lab test data. The result shows that Chang 4＋5 low permeability reservoirs are formed under delta front sedimentation environment, which be- long to low-porosity and extra-low-permeability reservoirs. They are composed of lithic arkosic sandstone with low compositional maturity, their main pore throat types are inter- granular pore and intragranular solution pores, and the pore throatstructure is fine to micro.Characteristics of low permeability reservoirs are mainly controlled by sedimentation ano （al- agenesis. The sedimentary environment determines the original physical property of reservoir by controlling composition and structure of reservoir rocks, and the diagenesis is an acquired factor and decisive factor affecting reservoir physical property. The compaction and cementa- tion are the main causes for low permeability reservoir, and the dissolution has a certain im- proving effect on reservoir.

关 键 词：储层特征 成因分析 长4+5油层组 姬塬油田 

分 类 号：P618.13[天文地球—矿床学]