塔里木盆地新构造运动时期构造应力方向
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黄玉平,女,在读硕士研究生,从事含油气盆地分析方面的研究。联系电话:13811635430,E-mail:yupinghuang001@163.com。

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全国油气资源战略选区调查与评价国家专项“塔里木新领域油气资源战略选区”(2010GYXQ02-06)。


Analysis of tectonic stress direction of Tarim basin during neotectonic period
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    摘要:

    塔里木盆地的新构造运动强烈,对盆地的构造变形和油气成藏产生了重要的影响。从断层、褶皱及钻井诱导 缝3方面分析研究区在新构造运动时期不同区块的最大主应力方向,进而预测盆地的应力场方向。塔北地区、柯坪 断隆和塔西南地区主要受挤压应力作用,形成排状分布的断层及褶皱,向盆地方向断层及褶皱的形成时期逐渐变 新,应力作用逐渐减弱;巴楚隆起和麦盖提斜坡的断层走向相近,呈排状分布;塔东南地区主要受走滑和挤压的共 同作用,断裂与构造带平行分布;塔中地区以走滑、挤压作用为主,扭应力使该区发育较对称的褶皱,形成现今的构 造形态。塔北地区、柯坪断隆和塔东南地区最大主应力方向主要为北西—北北西向,塔西南地区和巴楚隆起—麦 盖提斜坡最大主应力方向为北东—南西向;而塔中地区最大主应力方向为北东东—北东向。从盆地新构造运动各 时期发育的断裂、褶皱及主应力方向分布特点可以看出,其主应力方向在时间和空间上存在一定的继承性。预测 塔里木盆地台盆区区域应力主要来自天山中西段及西昆仑山,呈“S”型分布,具有一定的压扭性。

    Abstract:

    The Tarim basin of neotectonic movement is very intensive, which plays an important role in the structural deformation of basin and hydrocarbon accumulation. The period activity by the Orogenic belt from platform margin to stage basin area decreased. From three aspects of fault, fold and drilling induced fractures, this paper mainly analyzes the maximum principal stress direction. The conclusions are the followings:①Kuche, Kalpin and southwest Tarim are forced by extrusion stress function, form the fault zone and fold belt which is distributed in line. With the direction to basin, the formation age gradually becomes variable young, and the stress function gradually becomes weak. The fault strike of Bachu-Maigaiti area is similarly distributed, which are rows of distribution and the same fault strike; The southeast Tarim in the mainly is forced by the strike-slip and squeezed function, and the development of the fault and tectonic belt is parallel distributed; The central Tarim area is mainly forced by strike-slip fault, extrusion function. The torsional stress makes the fold development symmetry by two-way control of fault, and forms the present structural forms. ②The greatest principal stress direction in different blocks of Tarim basin is diverse. In central Tarim area, Kalpin fault uplift and southeast Tarim,the principal stress direction is mainly north-west. The one in southwest Tarim is east-north, and in the Bachu-Maigaiti area is north-east, and in the central Tarim basin, the principal stress direction of this block is north east to north-east. ③The basin neotectonic movement which developed the fault zone and fold belt and its principal stress direction is in accordance with each other, and the main stress direction is of inheritance in time and spatial domain.

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黄玉平,姜正龙,李景瑞,王步清,满来.塔里木盆地新构造运动时期构造应力方向[J].油气地质与采收率,2013,20(3):5~9

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  • 在线发布日期: 2015-09-18