【摘要】 土库曼斯坦萨曼杰佩气田卡洛夫阶—牛津阶碳酸盐岩沉积相类型丰富,发育有台地前缘缓斜坡、台地边缘生物礁和浅滩、开阔台地和局限台地5个相带,储层岩性主要为台地边缘生物礁和浅滩相的礁灰岩、生物屑灰岩和鲕粒灰岩等,具有厚度大和大多为优质储层的特点。以岩芯观察描述和薄片鉴定为基础,综合利用地质、钻井、地震等资料,深入探讨了萨曼杰佩气田卡洛夫阶—牛津阶碳酸盐岩沉积相特征和储层类型,划分出孔洞缝型、孔隙型、裂缝-孔隙型和裂缝性储层类型,确定孔洞缝复合型储集层主要发育于高能环境下形成的台地边缘生物礁相带;孔隙型和裂缝-孔隙型储层主要发育在相对高能的台地边缘浅滩相带,在开阔台地台内浅滩中也有一定规模的发育;裂缝型储层主要分布在泻湖和潮下等低能相带。在此基础上建立了不同储层类型的测井相响应模式。研究了岩性、沉积相以及成岩作用对储集层发育的控制作用,认为高能的礁、滩相带最有利储层发育,而强烈的压实和胶结作用是破坏储层储集性能的主要因素。更多还原

【Abstract】 There are plenty types of carbonate sedimentary facies in Callovian-Oxfordian of Samandepe gasfield,Turkmenistan.It developed five facies belts,including platform slope,platform margin reef,shallow,open platform,and restricted platform.The platform margin reef and shallow strata,along with bioclastic and ooid limestones,are most important intervals for high quality reservoir due to their huge thickness.Based on the comprehensive research of geology,well drilling and seismic data,and thin section and precipitation facies analysis,this study discusses the characteristics of Callovian-Oxfordian carbonate deposition facies in the Samandepe gas field,and then defines four types of reservoirs containing porosity-hole-fissure type,pinhole type,fissure-hole type,and fissure type.Porosity-hole-fissure type reservoir is distributed mainly in the platform margin reef with a high energetic setting;pinhole-type and fissure-hole type reservoir were developed mainly in platform margin facies,which formed in relatively-high energetic environment,and open shallow platform;fissure-type reservoir is distributed dominantly in low energy facies zones,such as laggon and subtide.The response models of bolehole logging to different reservoir types are established based on the analysis above,and the control action of lithology,precipitation facies and diagenesis over reservoir formation is also discussed in this paper.Therefore,it can be concluded that compaction and cementation are vital elements of destroying reservoir capability although the energetic reef flat facies is most favorable for the growth of reservoirs.更多还原