大宛齐油田康村组储层微观孔隙结构特征及分类评价

Characteristics of Micro-pore Structures of Reservoirs and Classification Evaluation of Kangcun Formation in Dawanqi Oilfield

综合应用铸体薄片、扫描电镜、压汞测试等分析化验资料,对大宛齐油田康村组储层的微观孔隙结构特征进行了研究。研究表明,康村组储层主要的成岩作用是压实作用和胶结作用,其次是陆源碳酸盐颗粒的溶蚀和交代作用;储集空间类型主要为剩余粒间孔隙、粒间溶孔、粒内溶孔;喉道组合类型为中孔中喉和中孔小喉型为主。在此基础上,应用主因子分析、聚类分析将康村组储层孔隙结构划分为4个基本类型,为油田开发调整提供了可靠的地质基础。

The data of casting sections,scanning electron microscope and mercury intrusion test were used to study the microscopic pore structures of Kangcun Formation in Dawanqi Oilfield.Study indicated that its reservoir diagenesis was compaction and cementation,while the next was corrosion and metasomatose of terrigenous carbonate perticles.reservoir space types were mainly composed of remaining intergranular pores,intergranular dissolved pores and intragranular dissolved pores.The pore throat assemblage types were mainly medium-pore and medium-throat and medium-pore and small throat.By means of factor analysis and cluster analysis,the microscopic pore structure can be classified into four types.All of these provide the reliable geologic foundation for the adjustment of oilfield development plan.