Analysis of tectonic stress direction of Tarim basin during neotectonic period
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TE111.2

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    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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. Analysis of tectonic stress direction of Tarim basin during neotectonic period[J]. Petroleum Geology and Recovery Efficiency,2013,20(3):5~9

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  • Received:
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  • Online: August 01,2023
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