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针对吐哈再生型前陆盆地北部山前逆冲构造带油气富集规律研究的需要,结合山前带不同块体构造发育特征分析与已发现油气藏解剖,提出山前带主要发育以走滑断裂体系为主、逆冲断裂为辅的断裂输导体系和与输导砂体相配置的构造脊2类输导体系,发育2种主控因素各异的油气成藏模式,即有走滑断裂发育的构造块体油气输导体系主要受控于走滑断裂及与其配置的逆冲断裂体系,缺乏走滑断裂发育的构造块体油气运移主要受控于与输导砂体相配置的构造脊。结合已有油气勘探发现过程分析,受走滑断裂控制的构造块体的油气扩展方向为构造高点靠近走滑断裂一侧的低断块,预探方向为逆冲断裂带下盘,油藏主体位于构造高部位;缺乏走滑断裂发育的构造块体油气预探方向主要为逆冲断裂带下盘,油藏主体位于逆冲断裂带下盘靠近生烃洼陷的部位。
In view of the need of hydrocarbon enrichment in the Piedmont thrust belt in the northern Tuha reclaimed foreland basin, combined with the analysis of the structural characteristics of different blocks in the foreland belt and the discovered oil-gas reservoir anatomy, Fault system, fracture system supplemented by thrust fault, and structural ridge 2 catalysis system which is configured with the sand body. Two kinds of hydrocarbon accumulation models with different controlling factors are developed, namely, The fault-developed tectonic block hydrocarbon transport system is mainly controlled by strike-slip faults and its associated thrust system. The migration of the tectonic blocks lacking strike-slip faults is mainly controlled by the configuration of the transport sand body Construct ridges. Based on the analysis of existing oil and gas exploration discoveries, the tectonic blocks under the control of strike-slip faults have the directions of oil and gas expansion as low fault blocks with structural highs near the strike-slip faults. The pre-exploration direction is the thrust plate of the thrust fault zone, The main body is located in the high part of the structure. The tectonic blocks lacking strike-slip faults are predominantly thrust plate thrust belts, and the main body of the reservoirs is located in the lower plate of the thrust belt near the hydrocarbon generating depression.