春光油田春10井区沙湾组储层特征与分布规律研究

Reservoir Characteristics and Distribution of the Shawan Formation in Well Chun10 Block of Chunguang Oilfield

目前对春光油田春10井区储层展布规律的认识已满足不了油田开发的需求，其造成水平井投产后开发效果存在较大差异，综合利用岩心、薄片、扫描电镜、X射线衍射、物性、测井等资料，对该区沙湾组储层特征及其展布规律进行研究。研究表明：该区储层岩石类型以岩屑长石砂岩为主；孔隙类型组合主要为原生粒间孔+剩余粒间孔+微量粒内溶孔，孔隙直径及孔吼宽度较大，孔喉分选性好，储层较均质；沉积相属于河流相沉积，渗透率与孔隙度相关性较好，为特高孔高渗储层。在“河流沉积”模式指导下，研究了储层在纵向、横向上的展布规律，储层基本成南北向分布，东西两侧均为侧缘尖灭，砂厚一般在3.0~8.0 m左右。

The understanding of the reservoir distribution can't meet the needs of oilfield development,which has caused the great difference development effect after horizontal well production in well Chun10block of Chunguang oilfield, Based on cores, thin section, scanning electron microscopy, X- raydiffraction, physical properties, logging and so on, Reservoir characteristics and distribution wereinvestigated in the area,It shows that: The reservoir rock types are mainly lithic arkose, Pore combinationtypes are mainly primary intergranular pore+ residual intergranular pore+ trace intragranular dissolvedpore, The pore diameter is large and the pore roar width is wide, the sorting characteristics of pore throatis good , the reservoir is relatively homogeneous; It's fluvial facies sedimentary, the correlation betweenporosity and permeability is good and it's the high porosity, high permeability reservoir. The distributionof the reservoir is S-N, E-W is lateral margin pinchout, sand thickness is 3.0~8.0 m or so.