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通过三维地震资料解释,对塔里木盆地玉北地区断裂特征进行了详细分析,提出该区主断裂在加里东中期早幕已开始活动,厘定了加里东早期、加里东中期早幕、加里东中期Ⅰ幕、加里东中期Ⅲ幕、加里东晚期—海西早期、海西晚期、喜马拉雅期等7个断裂活动期次.玉东1和玉东2断裂带加里东中期以后基本不再活动,玉北7、玉北1、玉东3和玉东4断裂带加里东中期以后仍有继承性活动.总体看,加里东中期断裂活动强烈,后期断裂活动性变弱.呈NE走向的6排断裂带,总体具有东强西弱、北强南弱的活动特点.玉北地区基底断裂和古生界滑脱断裂在中、下寒武统盐岩层内的对接,构成油气向上运移的主要通道,但不同时期断裂活动对油气的控制有差异.加里东中期、海西晚期、喜马拉雅期断裂活动对油气成藏具有建设性作用,其中海西晚期断裂活动对油气成藏有利,喜马拉雅期断裂活动主要影响油气调整.
Through the interpretation of the 3D seismic data, the characteristics of the faults in the Yubei area in the Tarim Basin have been analyzed in detail. It is suggested that the main faults in this area started their activities in the early Caledonian mid-term, and the early Caledonian, Caledonian mid-term, Curtain, Caledonian mid-stage III, Caledonian-Early Hercynian, Late Hercynian, Himalayan, etc. The Jadeong 1 and Jadeong-2 faults basically disappeared after the Caledonian mid-term, 7, Jadebei 1, Jadeong 3 and Jadeong 4 fault zones still have inherited activities after Caledonian medium-term. Generally speaking, the Caledonian mid-term faults were intense and the late-stage faults became weaker, with NE trending 6 rows of fault zones , With the characteristics of weakening of the east and weak of the west and weakening of the north and south.The basement faults and Paleozoic sliding faults in the Yubei area are interlinked in the middle and lower Cambrian salt rock formations and form the main channel for the upward migration of oil and gas. Faults in different periods have different control over hydrocarbon accumulation.Calidong Middle and Late Hercynian faults and Himalayan faulting play a constructive role in hydrocarbon accumulation, of which the late Hercynian faulting activities are favorable for hydrocarbon accumulation and Himalayan The main impact of the fault activity of oil and gas adjustment.