富黄探区槐树庄地区长6油层储层特征研究

Study on Reservoir Characteristics of Chang 6 Oil-bearing Formation in Huaishuzhuang Area of Fuhuang Block

通过岩石薄片、铸体薄片、阴极发光、电镜扫描等方法,结合地质录井和测井资料,对富黄探区延长组长6油藏储层特征进行了研究。研究结果表明,长6岩石类型以长石石英砂岩及岩屑石英砂岩为主。结构成熟度较高,其主要储集空间是残余粒间孔和粒间孔。研究区的成岩作用主要有压实作用、胶结作用和溶蚀作用。压实作用、胶结作用对储层孔隙起着破坏性作用,是形成特低渗透储层的主要原因,而溶蚀作用使储层孔隙和渗透率增大,对特低渗储层储集性能的改善具有积极的意义。

Combined with geologic control and logging information,reservoir characteristics of Chang 6 oil-bearing formation in Huaishuzhuang area of Fuhuang block were studied by the methods of thin section,casting section,cathode luminescence,SEM and vitrinite refletance.The results indicate that the reservoir mainly consists of the feldspathic quartz sandstone and lithic quartz sandstone with high texture maturity;its main storage space is survived inter-granular pores and inter-granular pore.Its diagenesis mainly includes compaction,cementation and dissolution.Mechanical compaction and cementation resulted in the destruction of primary pore,which is why the reservoir formed into super low permeability;but the dissolution improved the porosity and permeability of the reservoir,which makes the positive significance to the improvement of storage performance in the super low permeability reservoir.