Geological and Structural Characteristics and Physical Simulation of the Tuziawat Block, Kuqa Depression of the Tarim Basin
详细信息
- 责任者：Wu Chao(Tarim Oilfield Company ; PetroChina ; Kurle ; Xinjiang 841000 ; China) ; Xie Huiwen
- 刊名：Natural Gas Industry
- 出版年：2012
- 卷期：32(5)
- 页码：p.19-24
- issnNo：ISSN1000-0976
- isbnNo：CN51-1179/TE
摘要
The Tuziawat Block is located at the western part of Kelasu thrust zone in the Kuqa Depression, Tarim Basin, where several structural zones are intersected and divided into Awat and Boz segments. Broad synclines are developed above the salt layers. The presalt structure can be divided into piedmont monocline zone, faulted fold zone and front uplifted zone. The Awat thrust fault occurs at the front of the block, slip faults are developed at the western margin, Bozidun and Wensu salt dunes and the Kalayuergun slip fault are developed at the southeastern margin. Physical modeling reveals the presalt deformation mechanism of the Tuziawat block. Both the Awat and Boz segments are the results of compressional deformation of salt basins. The former has a compressional length of 21 km and a compressional rate of 52.5%, while the later 28 km and 25.5% respectively. The deformation mechanisms of the two slip faults on both sides of the Tuziawat salt basin are also identified. The development of salt diapire initiated in the Paleogene Suwey stage, earlier than the major structural deformation in the Neogene Kangcun Kuqa stages. These understandings are of great significance to the exploration in the study area.