文13东成岩作用及其对储层物性的影响分析

Analysis of Diagenesis Influence on the Physical Properties in Eastern Wen 13 Block

通过对文13东油藏测井、岩心、铸体薄片、扫描电镜和其他各种物性资料的分析,对该区的储层特征和影响物性的相关因素进行系统的分析与研究。结果表明:石英砂岩为文13东油藏储层主要的砂岩类型;且成分成熟度较小。文13东油藏储层总体表现为中孔占绝对优势、低孔为辅;中渗占绝对优势、低渗为辅的分布特征。储层内较高的孔隙压力,在很大程度上阻止了储层进一步的压实作用。碳酸盐岩和泥质胶结作用使得储层物性变差,但当泥质含量大于20%后,孔隙度降低有减缓的趋势。胶结作用与石英次生加大均是破坏性成岩作用,而绿泥石能对保存储层物性产生积极的影响。

Research has been made systematically on reservoir characteristic and influence factor of physical property through the analysis of well loging,cores,cast slices,scanning scanning electron microscope and other property data.The results indicate that：the sandstone of Wen 13 Block is mainly quartz sandstone with a low compositional maturity.The feature of medium porosity and permeability predominates in this area.High porepressure,to some degree,resisted further compaction.cementation of carbonatite and shale made physical property get worse,but when shale content rose to more than 20％,porosity trends to decrease more slowly.Compaction and secondary enlargement of quartz are destructive diagenesis,while chlorite has constructive effect on conservation of reservoir properties.