埋藏期“断溶体”的储集特征、成因及发育规律——以塔中十号带奥陶系良里塔格组岩溶储层为例  

Origin, Development and Features of the “Fault-dissolved body”Reservoir Formed in Burial Stage: A Case Study of Upper Ordovician Lianglitage Formation in Tarim Basin, Northwest China

作　　者：邓兴梁[1] 乔占峰 王彭[1] 常少英[2,3] 何军 李维岭[2,3] 赵龙飞[1] 李昌 

机构地区：[1]中国石油塔里木油田分公司 [2]中国石油杭州地质研究院 [3]中国石油天然气集团公司碳酸盐岩储层重点实验室

出　　处：《海相油气地质》2018年第1期47-55,共9页Marine Origin Petroleum Geology

基　　金：国家科技重大专项"大型油气田及煤层气开发"(编号:2016ZX05004);中国石油重大科技专项"深层油气勘探开发关键技术研究"(编号:2014E-32)资助

摘　　要：埋藏期的"断溶体"是塔里木盆地碳酸盐岩领域重要的储层类型,但对此的研究尚不深入。以塔中十号带为例,基于录井、岩心、薄片、测井和地球物理资料,认识到该带的埋藏期断溶体为缝洞型储层;基于与断溶体相关裂缝充填物的岩石学与地球化学分析,认为断溶体与埋藏溶蚀作用关系密切;据溶蚀模拟实验与断溶体发育特征,断溶体的发育受控于断裂和先期孔隙分布,既具有断控性,同时也具有层控性。断溶体储层的预测应以刻画与不整合面或与岩性结构差异相关的先期孔隙分布带为关键。The 野fault-dissolved body冶 formed in burial stage is an important reservoir in the exploration of carbonate in Tarim Basin, but it has been studied weakly. Taking Tazhong 10th Belt as an example, based on the analysis of cores, thin-sections, well-logging, and seismic data, it has been known that fault-dissolved bodies formed in burial stage are fracture-cavern reservoirs. Petrographic and geochemical analysis on the fracture-fillings revealed that the fault-dissolved bodies are closely related to the burial dissolution. Simulation experiment on the burial dissolution and distribution of fault-dissolved bodies suggest that the development of them is controlled by faults and pre-existing porous zones, which with both fault-controlled features and strata-controlled features. It has been concluded that the prediction of fault-dissolved reservoir should focus on characterizing the distribution of pre-existing porous zones which related to the unconformities and/or the variable lithologic layers.

关 键 词：塔里木盆地 塔中地区 奥陶纪 断溶体 储层特征 储层成因 储层发育规律 

分 类 号：TE122.2[石油与天然气工程—油气勘探]