摘要
根据大量的岩性、物性、孔隙结构分析数据和岩石薄片等资料,在沉积因素分析的基础上,结合成岩作用分析了储层发育的控制因素。研究认为长岭气田登娄库组储层为辫状河三角洲平原沉积,以长石岩屑砂岩为主,储集空间主要为粒间溶孔,储层具有低孔、低渗的物性特征。母岩是储层砂体形成的物质基础,石英砂岩储层物性明显好于岩屑石英砂岩和岩屑砂岩;沉积演化特征和次生孔隙发育段控制有效储层发育层段;沉积微相和成岩相控制平面非均质性;强烈的压实作用、胶结作用是形成低渗储层的主要原因,但溶蚀作用产生的次生孔隙形成了相对高渗带,使原本低渗的储层物性得到一定程度的改善。
Based on large amounts of data of lithological characters,physical property, pore structure and thin section, we paraphrased controlling factors of the reservoir development in combination with sedimentary elements and diagenesis. The results indicate that Denglouku Formation sandstone belongs to braided delta plain subfacies in Changling gas field, composed of feldspathic lithic sandstone, the reservoir space consists in the intergranular dis- solved pores, associated with low porosity and permeability. Rock source is the basis of sand bodies, the physical properties of quartz sandstone are better than that of lithic quartz sandstone and lithic sandstone. Both sedimentary evolution and position of secondary pores control the distributive intervals of effective reservoir. The plane hetero- geneity is constrained by sedimentary mierofacies and diagenetic facies. Strong compaction and cementation are the dominant factor to create the low permeability reservoirs,in contrast that dissolved secondary pores are in favor of relatively high permeability zones so as to make the low permeability reservoir become better.
出处
《天然气地球科学》
EI
CAS
CSCD
北大核心
2011年第5期827-833,共7页
Natural Gas Geoscience
基金
国家重大科技专项"天然气开发关键技术"(编号:2011zx05015)资助
关键词
登娄库组
低渗
长岭气田
控制因素
Denglouku Formation
Low permeability
Changiing gas field
Controlling factors.
