准噶尔盆地中部2区块走滑断层识别及石油地质意义

The Identification of the Strike-Slip Faults in Central Abdomen Junggar Basin and Its Petroleum Geological Significances

摘要: 准噶尔盆地中部2区块位于盆地的腹部，其侏罗系断裂特征一直以来以逆断层为主，但从近期的利用相干、曲率等断裂分析技术研究表明，该区侏罗系的剖面断裂具有的“花状构造”，平面上次级断裂呈雁行式展布，空间具有“海豚效应”等现象，因此，研究认为该区块侏罗系断层以为右旋走滑断裂为主。该认识对于提高对区块的油气成藏和圈闭评价具有重要的意义。

Abstract: The Central Block 2 of Junggar Basin is located in the centre of the basin. It had been considered that its Jurassic fractures were characterized by reverse fault-based. But the recent analysis of fractures using methods of coherent and curvature showed that the “flower” structure developed at Jurassic displaying in seismic section in “Y” type, and the second fractures spread in “Yan Line” in plane, and the fractures had “dolphin” effect in space. So it was suggested that the Jurassic fractures were dominant by dextral strike-slip fault-based which provided guidance for improving hydrocarbon reservoirs exploration and trap evaluation.