塔中-巴麦地区构造沉积演化及其对奥陶系储层的控制

doi:10.11743/ogg20140615

摘要/Abstract

摘要： 利用近期获得的钻井、地震资料,开展塔中-巴麦地区早古生代构造沉积演化研究,提出塔中-巴楚-玉北地区加里东中期形成了统一的大型"古隆起",控制着晚奥陶世早、中期沉积相的展布;加里东晚期-海西早期,大型"古隆起"分化发展,和田"古隆起"定型,包括玉北地区东部及塔中南坡在内的塘古巴斯坳陷区北东向"潜山"构造带形成,塔中北坡发育北东向走滑断裂带.受早古生代构造-沉积演化特征控制,塔中-巴麦地区奥陶系碳酸盐岩储层发育宏观地质条件存在差异.塔中-巴楚位于加里东中期大型古隆起的主体部位,中、下奥陶统具备加里东中期Ⅰ幕岩溶储层发育条件;玉北中西部、巴楚西部以及塘古巴斯坳陷区北东向潜山构造带还具备加里东晚期-海西早期岩溶储层发育条件;塔中Ⅰ号断裂带以北的顺托果勒地区长期位于古隆起的斜坡部位,北东向断裂发育且多期活动,奥陶系碳酸盐岩发育与之相关的缝洞型储层.

关键词: 构造演化, 古隆起, 碳酸盐岩储层, 奥陶系, 塔中地区, 巴麦地区

Abstract: Tectonic-sedimentary evolution history of the Early Paleozoic was further studied in the Tazhong-Bachu-Maigaiti area by using the drilling data and seismic data obtained recently. The results show that a unified large "paleo-uplift" was formed in the Tazhong-Bachu-Yubei area in the Middle Caledonian movement, which controlled the distribution of the sedimentary facies during the early and middle stage of the Late Ordovician. Thenceforth, regional differentiation and development occurred in this large "paleo-uplift" from the Late Caledonian to the Early Hercynian, which was characterized by the development and finalization of the Hetian paleo-uplift, by the formation of the NE-trend buried hill structure zones in the East Yubei area and the Tanggubasi Depression, and by the development of the NE-trend strike-slip faults in the Tazhong North Slope. The macroscopic geologic conditions for the development of the Ordovician carbonate reservoir in these areas were different due to the control of the tectonic-sedimentary evolution characteristics of the Early Paleozoic. The Tazhong-Bachu area was located in the main part of the large middle-Caledonian paleo-uplift, in which the karst reservoirs of Lower Ordovician were developed in this stage. During the Late Caledonian to the Early Hercynian, the karst reservoirs of Lower Ordovician might be developed continually in the Middle and West of Yubei area, the western Bachu area, and the NE-trend buried hill structure zones of the Tanggubasi Depression. Fractured-vuggy Ordovician reservoirs, related with the multi-period activities of the NE-trend faults, possibly developed in the Tazhong North Slope.

Key words: tectonic evolution, paleo-uplift, carbonate reservoir, Ordovician, Tazhong area, Bachu-Maigaiti area

中图分类号:

TE122.2

李慧莉,刘士林,杨圣彬,等. 塔中-巴麦地区构造沉积演化及其对奥陶系储层的控制[J]. 石油与天然气地质, 2014, 35(6): 883-892. doi: 10.11743/ogg20140615 Li Huili,Liu Shilin,Yang Shengbin,et al. Tectonic-sedimentary evolution of Tazhong-Bachu-Maigaiti area and its control on the Ordovician reservoir[J]. Oil & Gas Geology, 2014, 35(6): 883-892. doi: 10.11743/ogg20140615

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