Characteristics of strike-slip fault and its controlling on oil in Shuntuoguole region, middle Tarim Basin
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摘要: 通过对塔中顺托果勒区块三维地震资料的精细解释,识别出了顺托1号左旋走滑断裂,并对其构造特征、活动期次、形成机理及对油气成藏的影响进行了分析.研究认为,顺托1号走滑断裂主要发育线性延伸构造、负花状构造、雁列式张性正断层、海豚和丝带效应等构造样式,其主要形成期在志留纪末期-泥盆纪早期.加里东晚期,来自东南方向阿尔金岛弧强烈的斜向碰撞挤压作用,对北东向的基底薄弱带产生走滑分量,形成了北东走向的左旋走滑断裂.近期的研究成果表明,与北东向走滑断裂形成有关的低幅度背斜圈闭群是该区块志留系比较有利的油气勘探目标.Abstract: Based on the detailed interpretation of 3D seismic data from Shuntuoguole region in the middle Tarim Basin,the Shuntuo No.1 strike-slip fault was identified,and its structural characteristics,active periods,genesis and influences on reservoir were also studied.The structural styles of the Shuntuo No.1 strike-slip fault included extensional linear structure,negative flower structure,en-echelon tension normal fault,dolphin and riband effects,etc.Its main active time lasted from the end of Silurian to the Early Devonian.At the end of Caledonian,the Altym Island Arch compressed severely from the southeast and acted on the northeast-trending weak zone of basement,resulting in the northeast-trending strike-slip fault.Recent studies have proved that low-amplitude anticline traps related to the northeast-trending strike-slip fault are favorable oil-and-gas exploration targets of Silurian in Shuntuoguole region of the middle Tarim Basin.
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