摘要
利用岩石薄片、铸体薄片、孔渗分析等实验手段,对苏北盆地金湖凹陷阜二段砂岩储层的矿物岩石特征、储层物性特征、孔隙结构特征以及储层物性的主要影响因素进行了相关分析。研究表明,阜二段储层岩石颗粒总体偏细,不同地区岩石成分成熟度均值差别小、范围值都较宽;西部斜坡带储层物性相对较好,其他地区以低孔、低渗—特低渗储层为主;压实和碳酸盐胶结是导致储层物性变差的主要原因;溶蚀作用和油气充注是抑制物性变差、改善储集性能的重要因素。西部斜坡带等地区是储层物性相对较好的有利地区。
The lithologic characteristics ol minerals,reservoir physical properties and pore structure ol sandstones in the second member ol Funing Formation in the Jinhu Sag ol Subei Basin were studied based on petrographic thin sections,casting thin sections,porosity and permeability,and the influencing factors lor reservoir physical properties were discussed. The sandstones in the second member ol Funing Formation are generally line grained. The average maturity ol rock composition is similar among dillerent regions,and range widely. The sandstones on the western slope ol Jinhu Sag have better physical properties while those in the other areas are leatured by low porosity and low to extra low permeability. Compaction and carbonate cementation are the main reasons leading to poor reservoir physical properties. Dissolution and hydrocarbon lilling are important lactors to restrain diagenesis and improve reservoir characteristics. The western slope has relatively better porosity and permeability and is a lavorable target lor hydrocarbon pools.
出处
《石油实验地质》
CAS
CSCD
北大核心
2017年第4期477-483,共7页
Petroleum Geology & Experiment
基金
中石化重大科技项目"苏北盆地油气聚集规律及精细评价关键技术"(ZDP17010)资助
关键词
砂岩物性
沉积微相
成岩作用
油气充注
阜二段
金湖凹陷
苏北盆地
sandstone physical property
sedimentary microlacies
diagenesis
oil and gas lilling
second member of Funing Formation
Jinhu Sag
Subei Basin