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碳酸盐岩潜山是国内外油气勘探的热点领域,为探讨长期抬升淋滤区多期岩溶的剥离问题,明确潜山优质储层形成演化模式,以塔里木盆地牙哈—英买力寒武系潜山为研究对象,在系统分析储层岩石类型、储集空间类型、储层物性特征的基础上,探讨储层主控因素,建立优质储层形成模式。研究发现:牙哈—英买力地区储层岩性以晶粒云岩、砂屑云岩为主;晶间溶孔、溶蚀孔洞等次生孔隙为主要储集空间;储层非均质性强。台内滩亚相储层物性明显优于潮坪—潟湖亚相,反映了原始沉积相带是储层发育的物质基础;提出前热液表生岩溶和后热液表生岩溶,总结了2类岩溶的识别标志并明确了研究区以前热液表生岩溶作用为主。最终,结合构造演化和成岩作用研究成果,建立了研究区优质储层形成模式,预测了储层平面分布。
Carbonate buried hill is a hot area of oil and gas exploration both at home and abroad. In order to discuss the problem of multi-period karst detachment in long-term uplift leachate area, the formation and evolution model of high-quality buried hill is clarified. Based on systematic analysis of reservoir rock types, types of reservoir space and physical properties of reservoirs, this paper explores the main controlling factors of reservoirs and establishes a model of high-quality reservoir formation. It is found that the lithology in the Yaha-Yingmaili area is dominated by crystalline dolostone and dolomitic dolomite; interstitial pores such as intergranular dissolved pores and dissolved pores are the main reservoir space; reservoir heterogeneity Strong. The physical properties of the subaerial reservoirs in the inland beach are obviously better than the tidal flat and lagoon subfacies, which reflects that the original sedimentary facies belonged to the material foundation of the reservoir development. Prehistoric epikarst karstification and epithermal epikarst karstification were presented. The identification of karst-like and clear the hydrothermal superficial karstification before the study area. Finally, based on the research results of tectonic evolution and diagenesis, the formation model of high-quality reservoirs in the study area is established and the reservoir plane distribution is predicted.