摘要
渤南油田位于济阳坳陷沾化凹陷的渤南洼陷 ,是胜利油区地质储量最大的深层低渗透油田 ,主要开发层系沙三段 4砂组为浊积成因砂岩 ,埋藏深度为 32 0 0～ 340 0m。以渤南油田三区沙三段 4砂组为例 ,分析成岩作用对该砂组储集层储渗结构的改造作用。降低孔隙度的成岩作用主要为压实作用、胶结作用以及交代作用 ,其中 ,物理压实主要发生在 2 50 0m以上深度 ;溶解作用产生次生孔隙 ,增大孔隙 ,并主要发生在长石颗粒和碳酸盐胶结物中 ;成岩黏土矿物对储渗结构起损害作用。进行渤南油田成岩作用与储集层特征演化关系的研究 ,搞清低渗透储集层储渗结构 ,对于指导开发方案调整、提高采收率具有重要意义。参 2 (王孝陵摘 )
Bonan oil field is located in Bonan sag of Jiyang depression and is a deep and low permeability oil reservoir with the largest OOIP in Shengli oil province. The main productive horizon is the turbidite sandstone in Zone 4 of Member S 3 with a burial depth of 3200-3400m. Taking this zone as an example, the reworking action of genesis on the porosity and permeability of the sandstone formation is analyzed. Compaction, cementation and replacement lowered the porosity. Among these, physical compaction occurred mainly at a depth above 2500m. Dissolution gave secondary porosity and increased porosity, and it occurred mainly in feldspathic grains and carbonate cementation. Diagenetic argillaceous minerals gave unfavorable action on the porosity and permeability of reservoir beds. Fully understanding the effect of diagenesis on the evolution of porosity and permeability of the reservoir formation in order to know the porosity and permeability of these formation will have great significance to development plan adjustment and recovery efficiency increasing.
出处
《石油勘探与开发》
EI
CAS
CSCD
北大核心
2000年第6期37-38,共2页
Petroleum Exploration and Development
关键词
渤南油田
沙三段
成岩作用
储集层
孔隙结构
Sandstone
Low permeability reservoir
Diagenesis
Pore evolution
Bonan oil field
