【摘要】 通过钻井、测井、岩石薄片、扫描电镜和储层物性等资料的综合分析,对丹凤场构造须家河组的储层特征和储层主控因素进行了仔细的研究。结果表明,须家河组储层岩性是一套成分成熟度和结构成熟度中—较高的陆源碎屑岩;储集空间包括残余原生粒间孔、粘土矿物晶间孔和粒内次生溶蚀孔;储层孔喉小,连通较差,孔隙结构复杂;具有双重孔隙介质特征,孔渗低,相关性差,属于裂缝-孔隙性致密储层。残余原生粒间孔保留程度是决定储层质量的关键因素;优质储层一般发育于铁绿泥石环边的岩屑石英砂岩、中—粗粒岩屑砂岩和长石岩屑砂岩中。更多还原

【Abstract】 Based on some data from drilling,well logging,thin section,SEM and physical property,the reservoir characteristics and influencing factors of Xujiahe Formation in Danfengchang structure are studied.Results illustrate that:(1) Xujiahe Formation reservoir is composed of terrigenous clastic rock with middle to high compositional maturity and textural maturity;(2) its space mainly includes residual primary intergranular pore,clay mineral intercrystalline pore and intragranular secondary dissolution pore;(3) it is characterized by small pore throat,poor connectivity and complicated pore structure;(4) it is of dual porous media;(5) it is featured by low permeability,low porosity and poor correlation;(6) it belongs to a fractured-porous tight reservoir;(7) the preservation degree of residual primary intergranular pore in reservoir is the key factor to determine reservoir quality;(8) high-quality reservoir always distributes in the developed lithic quartz sandstone,middle-and coarse-grained lithic sandstone and feldsparthic lithic sandstone,with rigid debris as the soul,at the rim of ripidolite.更多还原