哈拉哈塘潜山型油藏特征与成藏主控因素研究

The Characteristics and the Controlling Accumulation Factors of Buried Hill Reservoir in Hanilcatam,Tarim Basin

塔里木盆地哈拉哈塘地区地质条件复杂,油气资源丰富,是重要的油气勘探区。通过对哈拉哈塘潜山区哈8井区的地质特征、油水分布特征以及对主控因素的分析研究,认为该区油水分布复杂,不具有分带性。从加里东到早海西期,奥陶系鹰山组—一间房组海相碳酸盐岩经历了多期岩溶的叠加改造,风化壳岩溶缝洞体储层发育,形成了良好的油气储存条件;潜山区奥陶系逐渐抬升剥蚀,鹰山组—一间房组储层之上的盖层的缺失与否对早期油藏的保存具有重要作用;断裂性质和局部构造控制了后期油气充注强度和油藏类型。多种控制因素使得哈801井、哈8井、哈802井等形成了相对独立的油气运聚体系。对潜山区哈8井区油气水特征的研究,有助于指导碳酸盐岩潜山型油气藏的勘探和开发。

Hanilcatam area in Tarim Basin is abundant in hydrocarbon which is an important hydrocarbon exploration area and complex geology conditions. Based on the analysis of the geology, fluid, oil/gas distribution, and the controlling factors of Ha 8 Area in Hanilcatam buried hill, we conclude that the oil and water distribution of the zone is complex and the fluids with no zonation. During Caledonian and early Hercynian, Yingshan and Yijianfang Formation of Ordovician were reformed by polyphase carst, and hole-fracture reservoir developed well, which provides the well reservoir for hydrocarbon charge. Due to the rise and denudation of the Ordovician layers in buried hill karst area, Tumuxiuke as well as the above layers is closely related to the paleo oil reservoirs conservation. Fault kind and local structure controls the late hydrocarbon charging intensity and the reservoir types. The above factors result in relative singular migration-accumulation systems in wells Ha801, Ha8, Ha802, etc. This research is helpful exploration and exploitation of the carbonate buried hill reservoir＇s.