摘要
针对塔中西部上奥陶统良里塔格组台缘与台内礁滩储层特征及演化差异性,综合岩芯、薄片、测井及地球化学分析等资料,对比分析二者储层基本特征、成岩及孔隙演化的差异性,建立储层发育模式,提出相应的勘探对策。储层特征上,台缘礁滩储层储集空间具组构选择性和非组构选择性并存特征,垂向上呈多个旋回叠置,横向呈准层状;台内礁滩储层储集空间为非组构选择性缝洞,主要分布在中下部,垂向厚度及横向连续性均低于台缘。台缘优质储层的演化及分布受准同生大气淡水溶蚀、早成岩近地表岩溶和埋藏溶蚀控制;台内储层受裂缝及埋藏岩溶作用控制。勘探对策上,台缘礁滩储层应优先三期岩溶与构造破裂作用叠加发育区,而台内应注重断裂及埋藏溶蚀的联合控制区。
Based on the characteristics and evolutionary variation of platform margin and intra-platform reef-shoal reservoirs in the Upper Ordovician Lianglitage Formation in the western Tarim Basin,data on rock core,thin slices,logging,and geochemical analysis were used to compare and analyze the differences in the basic characteristics,diagenesis,and pore evolution of the two reservoirs.A reservoir development model and proposed corresponding exploration strategies are established.In terms of the reservoir characteristics,the reservoir space of the platform margin reef-shoal reservoir shows the coexistence of fabricselective and non-fabric-selective characteristics.The reservoir is vertically stacked in multiple layers and is laterally aligned.The reservoir space ofthe intra-platform reef-shoal is inthe form ofnon-fabric selective fracture-holes,mainly distributes in the middle and lower parts.Its vertical thickness and lateral continuity are lower than those of the platform margin.The evolution and distribution of high-quality reservoirs in the platform margin are controlled by penecontemporaneous meteoric dissolution,early diagenesis near-surface karstification,and burial dissolution,whereas the intra-platform reservoirs are controlled by fractures and burial karstification.In terms of exploration strategies for platform margin reef-shoal reservoirs,priority should be given to the three-stage karst and tectonic rupture superimposed development zone.For intra-platform reservoirs,attention should be paid to the jointly controlled zones of fault and burial dissolution.
作者
魏华动
石桂鹏
朱秀香
张云峰
王振宇
WEI Huadong;SHI Guipeng;ZHU Xiuxiang;ZHANG Yunfeng;WANG Zhenyu(Research Institute of Petroleum Exploration and Development,Northwestern Oilfield Company,SINOPEC,Urumqi,Xinjiang 830011,China;School of Geoscience and Technology,Southwest Petroleum University,Chengdu,Sichuan 610500,China)
出处
《西南石油大学学报（自然科学版）》
CAS
CSCD
北大核心
2020年第5期25-38,共14页
Journal of Southwest Petroleum University(Science & Technology Edition)
基金
国家自然科学基金(41702122)
国家重点基础研究发展计划(2012CB214800)
国家科技重大专项(2011ZX05005-004)。
关键词
储层特征
储层差异性
台地边缘
开阔台地
碳酸盐岩
礁滩体
塔中西部
良里塔格组
reservoir characteristics
reservoir variation
platform margin
open platform
carbonate rock
reef-shoal
western Tarim Basin
Lianglitage Formation
