姬塬地区三叠系延长组低渗透储层特征及成因分析  

Characteristics and Genetic Analysis of Low Permeability Reservoirs of Triassic Yanchang Formation in Jiyuan Area

作　　者：李彩云[1,2] 杨兆林[1,2] 方芳[1,2] 仲向云[1,2] 林丽[1,2] 陈娟[1,2] 宋翔[1,2] 

机构地区：[1]中国石油长庆油田分公司勘探开发研究院 [2]低渗透油气田勘探开发国家工程实验室

出　　处：《低渗透油气田》2013年第1期22-28,共7页

摘　　要：利用岩心观察描述、铸体薄片、扫描电镜、岩心分析化验等资料，对姬塬地区三叠系延长组储层的岩石学特征、储集空间类型、孔隙结构、成岩作用等进行了研究探讨，结果表明：沉积作用控制着研究区储层的发育特征，是造成储层粒度细、碳酸盐和泥质含量高、原生孔隙不发育、成分成熟度低、储层极易被压实的主要因素，是低渗透储层形成的内因；成岩作用是形成低孔隙度、低渗透率储层的关键，特别是成岩早期强烈的压实和胶结作用对低渗透率储层的形成起了决定性作用。Based on the data of core observation and description,cast thin section,scanning electron microscopy,and core analysis etc.,the petrological characteristics, space types ,pore structures, and diagenesis of reservoirs of Triassic Yanchang Formation in the Jiyuan area are researched and discussed. Results show that the deposition controls the reservoir development characteristics of the study area. It is the main factor that causes the reservoirs with fine grain size,high content of carbonate and shale,primary pores not developed ,low compositional maturity,and the reservoir easily be compacted. It is also the internal cause of the formation of low-permeability reservoirs. Diagenesis is the key factor of formation of low porosity and low permeability reservoirs,especially in the early diagenetic period the strong compaction and cementation play decisive roles in the formation of low-permeability reservoirs.

关 键 词：储层 低渗透 成岩作用 碳酸盐岩 黏土矿物 

分 类 号：TE121[石油与天然气工程—油气勘探]