【作者】 黄臣军；

【导师】 周新桂；

【作者基本信息】 中国地质科学院 ， 矿产普查与勘探， 2010， 硕士

【摘要】 阿克库勒凸起位于塔里木盆地塔北隆起南部,是发育在前寒武系变质基底之上的古凸起,凸起主要受到加里东中一晚期运动、海西早期运动、海西晚期运动、印支-燕山运动、喜马拉雅运动五期构造运动的影响。其中,海西早期和海西晚期运动对奥陶系影响最为显著,形成了奥陶系碳酸盐岩的主要断裂带、裂缝及岩溶作用,对油气藏的形成具有重要的意义。本文通过对阿克库勒凸起奥陶系海相碳酸盐岩控油构造及油气地质的系统总结和研究,根据主要控油构造分期次建立有限元数值模型,对阿克库勒凸起奥陶系储层的控油要素进行数值模拟,以研究不同期次的流体势大小、裂缝发育程度、渗流速率等三项内容；模拟期次包括海西早期、海西晚期、印支-燕山期和喜山晚期。通过对不同期次模拟成果的横向和纵向对比研究,认为：海西晚期和喜山期是阿克库勒凸起奥陶系油气藏的主要形成期,油气藏分布主要受断裂带控制,裂缝的发育程度控制了流体的渗流条件,受上覆地层的重力的非均衡挤压作用,油气具有从凸起斜坡深部向轴部运移的趋势,奥陶系油气藏具有轴部混合、东南新的特点。模拟成果显示,T750井-S97井沿线、LN11井-LN34井沿线的周围地区是海西早期油气成藏的有利区；海西早期形成的NE向断裂带和海西晚期形成的近EW向断裂带是海西晚期油气成藏的有利区；凸起中部埋深较大的断裂带、东南斜坡带是印支-燕山期油气成藏有利区；凸起轴部断裂带是喜山期油气成藏有利区。更多还原

【Abstract】 Akekule arch lies in the southern part of Tabei uplift, Tarim basin, which is an old arch developed on the pre-Cambrian metamorphosed basement. Its development is mainly affected by the mid-late Caledonian Movement, early Hercynian Movement, late Hercynian Movement, Indo-Chinese-Yanshan Movement and Himalayan Movement. Among which,early Hercynian Movement and late Hercynian Movement have affected on the Ordovician formatiom predominantly. They have caused the fonning of the main fault belts, fractures and karstification in the Ordovician carbonate formation, which act an important role for the fonning of hydrocarbon accumulation pools.The petroleum controlling structures and hydrocarbon geology is systematically concluded and studied in this paper. According to the petroleum controlling structures, the finite numerical models of the Ordovician formation of Akekule arch are built up to imitate the petroleum controlling factors,which contain fluid potential, fracture developing extent and darcy velocity. The imitated tectonic stages contain early Hercynian stage, later Hercynian stage,Indo-Chinese-Yanshan stage and Himalayan stage.Through analysis of the imitated results of single stage and comparison of the imitated results of several stages,conclusions are gained as follow:the odovincian hydrocarbon pools are mainly formed in late Hercynian stage and Himalayan stage, whose distribution are chiefly controlled by the fault belts;the darcy velocity is controlled by the fracture developing extent;under the pushing of the unequall gravity force of the overlying strata,hydrocarbon presents the tendency that it generally flows from the deep slope to the top arch;the Odovincian accumulation pools in the axial region are filled with mixed hydrocarbon,which in the southeastern slope are filled with new hydrocarbon.The imitated results shows that the range around T750 well-S97 well and LN11 well-LN34 well are the favorable hydrocarbon accumulating areas in early Hercynian stage; the NE striking fault belts formed in early Hercynian stage and the nearly EW striking fault belts formed in late Hercynian stage are the favorable hydrocarbon accumulating areas in late Hercynian stage; the southeastern slope and the deep fault belts in the middle part of the arch are the favorable hydrocarbon accumulating areas in Indo-Chinese-Yanshan stage; the fault belts in the axial region of the arch are the favorable hydrocarbon accumulating areas in Himalayan stage.更多还原