Characteristics of Geo-Temperature Gradient Distribution in the Kuqa Foreland Basin on the North Edge of the Tarim Basin, Western China

2003 ◽  
Vol 46 (3) ◽  
pp. 575-581 ◽  
Author(s):  
Liangshu WANG ◽  
Cheng LI ◽  
Shaowen LIU ◽  
Hua LI ◽  
Mingjie XU ◽  
...  
Keyword(s):  
Temperature Gradient ◽  
Tarim Basin ◽  
Foreland Basin ◽  
Western China ◽  
Gradient Distribution ◽  
The North ◽  
Kuqa Foreland Basin ◽  
North Edge

The effect of salt on the evolution of a subsalt sandstone reservoir in the Kuqa foreland basin, western China

2020 ◽  
Vol 35 (3) ◽  
Author(s):  
Hai Wu ◽  
Mengjun Zhao ◽  
Qingong Zhuo ◽  
Xuesong Lu ◽  
Long Wang ◽  
...  
Keyword(s):  
Foreland Basin ◽  
Western China ◽  
Sandstone Reservoir ◽  
Kuqa Foreland Basin

Quantifying the Effects of Salt Structures on Source Rocks Thermal Evolution of the Marine Sedimentary Basins

2020 ◽  
Author(s):  
Shaowen Liu ◽  
Liangshu Wang
Keyword(s):  
Thermal Conductivity ◽  
Thermal Properties ◽  
Tarim Basin ◽  
Thermal Evolution ◽  
Foreland Basin ◽  
Sedimentary Basins ◽  
Source Rocks ◽  
Burial Depth ◽  
Temperature Anomalies ◽  
Kuqa Foreland Basin

<p>Evaporitic salt is prevailed in marine sedimentary basins, and the discovered hydrocarbon reservoirs are generally associated with salt structures in the world; accordingly salt structures have attracted much attention from academic and industry during the past decade. Tarim Basin that locates in northwest China, is the largest marine sedimentary basin in China with great hydrocarbon resources potential. Previous studies of salt structures in this basin mainly focus on its strong sealing capacity and structural traps created by salt structures. However, besides its extreme impermeability and low viscosity, rock salt has another unique thermal properties, featured by a large thermal conductivity as high as 5~6 W/(m.K), usually 2~3 times greater than that of other common sedimentary rocks, but a relatively low radiogenic heat production. This strong contrast in thermal properties could change the evolving thermal regime and associated thermal history of the source rocks around salt bodies, but has not been understood well. Herein based on the theoretical models and interpreted salt bearing seismic profiles from the Kuqa Foreland Basin, northern Tarim Basin, we use the 2D finite element numerical experiments to investigate the impacts of salt structures on basin geothermal regime and associated hydrocarbon thermal evolution. Our results show that, owing to its high efficiency in heat conduction, the salt rocks would result in obviously positive temperature anomalies (3~13%) above the salt body and negative temperature anomalies (11~35%) in the subsalt, enhancing and restraining the thermal maturation of source rocks above and below the salt body, respectively. The amplitude and extent of geothermal effects of salt structures depend on the thermal conductivity, geometry, thickness and burial depth of the salt bodies. The thermally affected area around the salt body can be 2 time of salt radius laterally and 2~3 times of salt thickness vertically. Salt structures in the Kuqa Foreland Basin can prominently cool the subsalt formation temperature and accordingly reduce the thermal maturity (Ro) of Jurassic source rocks as much as 18%, enabling the source rocks to be still of gas generation other than over-mature stage as expected previously, which is favor for deep hydrocarbon preservation below salt. In particular, salt structures in the west and east Kuqa Foreland Basin show strong differences in their thickness, geometric pattern, burial depth and composition, the thermal effects of salt structures on thermal maturation of subsalt source rocks should differ accordingly, which is supported by the observed tempo-spatial variation of Ro for Jurassic source rocks in this basin. Finally, we propose that the geothermal effects of salt structures will be of great importance in the deep hydrocarbon resources potential assessment and exploration in marine sedimentary basins in China.</p>

Rejuvenation of the Kuqa Foreland Basin, Northern Flank of the Tarim Basin, Northwest China

1994 ◽  
Vol 36 (12) ◽  
pp. 1151-1158 ◽  
Author(s):  
Lu Huafu ◽  
David G. Howell ◽  
Jia Dong ◽  
Cai Dongsheng ◽  
Wu Shimin ◽  
...  
Keyword(s):  
Tarim Basin ◽  
Foreland Basin ◽  
Northwest China ◽  
Northern Flank ◽  
Kuqa Foreland Basin

The Cenozoic structural evolution of the northwestern Tarim Basin, China

2021 ◽  
Author(s):  
Wenhang Liu ◽  
Piotr krzywiec ◽  
Stanisław Mazur ◽  
Fanwen Meng ◽  
Zhuxin Chen
Keyword(s):  
Tarim Basin ◽  
Late Miocene ◽  
Seismic Data ◽  
Structural Evolution ◽  
Foreland Basin ◽  
Growth Strata ◽  
The North ◽  
Kunlun Mountains ◽  
Structural Style ◽  
West Kunlun

<p>The vast Tarim basin is surrounded by Tian Shan Mountains in the north, West Kunlun Mountains in the southwest, and the Altyn Mountains in the southeast. The southwestern Tarim Basin developed within the foreland of the West Kunlun Mountains and cumulated up to 10 km of Cenozoic strata. Despite several decades of geological studies its structural styles and details of its geological evolution are still being debated. In this study, we used seven regional seismic transects from the Yecheng - Hotan area calibrated by deep wells to assess lateral variations of a structural style and syn-tectonic sedimentation in this part of the basin.</p><p>The basement of the SW Tarim Basin is covered by Paleozoic and Cenozoic strata, as revealed by several deep calibration wells. The regional north-directed basement thrust together with two evaporitic detachments including the Middle Cambrian evaporites (Awatage Formation) and Paleogene evaporites (Aertashi Formation) controlled the overall tectonic framework and structural evolution of this part of the basin. The visible growth strata on seismic data indicate progressive development of the structural wedge within the frontal W Kunlun Mountains from the Late Miocene to the Present day.</p><p>Four main Cenozoic evolutionary stages of the W Kunlun Mountains and adjacent SW Tarim Basin have been determined. At the end of Paleogene, evaporites of the Aertashi Formation have been deposited in SW Tarim Basin; their thickness, as indicated by seismic data, increases towards the Kunlun orogenic wedge which suggests their deposition within the flexural foreland basin. Then, during the Early to Middle Miocene, about 4000m of sediments have been deposited in rapidly subsiding foreland basin. Towards the end of Late Miocene-Pliocene, tectonic wedging along thrust front led to significant uplift of the Kunlun Mountains that presently form S margin of the Tarim Basin. Quaternary migration of compressional deformations towards the North, towards the basin interior led to formation of the intra-basinal Jade anticline that was re-interpreted as a thin-skinned syn-depositional “fish tail” structure detached within the Paleogene evaporites. Present-day activity along some deeply buried thrusts of the Kunlun Mts. tectonic wedge might be related to current earthquakes.</p>

scholarly journals Palaeo-fluid evidence of the multi-stage hydrocarbon charges in Kela-2 gas field, Kuqa foreland basin, Tarim Basin

2012 ◽  
Vol 39 (5) ◽  
pp. 574-582 ◽  
Author(s):  
Xuesong LU ◽  
Keyu LIU ◽  
Qinggong ZHUO ◽  
Mengjun ZHAO ◽  
Shaobo LIU ◽  
...  
Keyword(s):  
Tarim Basin ◽  
Foreland Basin ◽  
Gas Field ◽  
Multi Stage ◽  
Kuqa Foreland Basin
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