Along-strike structural variation in a salt-influenced fold and thrust belt: Analysis of the Kuqa depression

Wang, Wei; Yin, Handong; Jia, Dong; Neng, Yuan; Zhou, Peng; Chen, Weili; Li, Changsheng; Wu, Zhenyun

doi:10.1016/j.tecto.2020.228456

Cited by 11 publications

(7 citation statements)

References 28 publications

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“…Its Jurassic strata stopped drilling at a depth of 4400 m due to the weak display of oil and gas in the Lower Yangxia Formation. Therefore, there are mainly developed Cenozoic and Mesozoic sediment deposits in the depression according to the previous studies. , The Cenozoic and Mesozoic strata comprise clastic strata such as mudstone, sandstone, coal interlayers, gypsum-salt, and conglomerate …”

Section: Geological Settingmentioning

confidence: 99%

“…16,17 The Cenozoic and Mesozoic strata comprise clastic strata such as mudstone, sandstone, coal interlayers, gypsum-salt, and conglomerate. 18 Potential source rocks are developed in the Jurassic and Triassic strata. The Jurassic source rocks develop the local area with a thickness of 300−700 m, which is less thick than that of Triassic in the range of 200−600 m. 2 Furthermore, the total organic contents (TOCs) have a significant difference.…”

Section: Geological Settingmentioning

confidence: 99%

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Hydrocarbon Accumulation Process and Mechanism in the Lower Jurassic Reservoir in the Eastern Kuqa Depression, Tarim Basin, Northwest China: A Case Study of Well Tudong 2 in the Tugerming Area

et al. 2021

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The Lower Jurassic reservoir has recently made a significant breakthrough in petroleum exploration in the Tugerming area of the eastern Kuqa depression, Tarim Basin, northwest China. Therefore, it is significantly essential to simulate the hydrocarbon charging process and analyze the accumulation mechanism in the study area. In our study, we mainly combine three geochemical techniques to identify the origin of crude oils and fluid inclusion characteristics in the target well (Tudong 2), including gas chromatography–mass spectrometry (GC–MS), comprehensive two-dimensional GC-time-of-flight MS (GC × GC–TOFMS), fluid inclusion analysis, and quantitative fluorescence technique. Combined comprehensive experiments with a set of burial history and tectonic thermal evolution history realize the reconstruction of the hydrocarbon charging process in the Yangxia formation. The results show that Jurassic coal-bearing source rocks are primary hydrocarbon sources, and there are three hydrocarbon charging events in the Lower Jurassic reservoir. First, the mature oils have expelled into the reservoir during the early-middle period (15–10 Ma) of the Miocene Kangcun Formation, forming yellow fluorescent oil inclusions and most of the quantitative grain fluorescence (QGF) indexes exceed 4. Second, numerous condensate oils have charged into the reservoir in the period of late Miocene Kangcun Formation-early Kuqa Formation (9–6 Ma), accompanied by blue-white oil inclusions and QGF on extract intensity greater than 4. Finally, vast natural gas has accumulated in the reservoir since Kuqa Formation (5–0 Ma), resulting in the adjustment of ancient reservoir and residual bitumen. Interestingly, we find that the hydrocarbon accumulation mechanism is characterized by self-generation and self-storage in the Jurassic Yangxia Formation, and the study area has prominent characteristics of late accumulation. Thus, the evidence obtained from our analysis suggests favorable geological conditions for the formation of a large oil and gas reservoir in the eastern Kuqa Depression.

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Section: Geological Settingmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

Hydrocarbon Accumulation Process and Mechanism in the Lower Jurassic Reservoir in the Eastern Kuqa Depression, Tarim Basin, Northwest China: A Case Study of Well Tudong 2 in the Tugerming Area

et al. 2021

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“…Situated in northern Tarim basin, the Kuqa depression is a superimposed foreland basin that overlain by the Mesozoic foreland basin and Cenozoic foreland basin, extending in a nearly NE-SW direction with and an area of 20,000km 2 (Fig. 1a, b, c) (Wang et al 2020;Zhang et al 2014). DWQ (DWQ) oilfield is situated in the Baicheng sag, northwest of Kuqa depression (Fig.…”

Section: Geologic Settingmentioning

confidence: 99%

Geochemical characteristics and genetic families of crude oil in DWQ oilfield, Kuqa Depression, NW China

Huang

Xiao

et al. 2021

J Petrol Explor Prod Technol

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As one of the most petroliferous oil producing area in Kuqa depression, Dawanqi (DWQ) oilfield is supplying with great attention. In this regard, the geochemical characteristics and oil families from DWQ field were investigated using molecular compounds analysis of GC, GC–MS techniques. The bulk geochemistry of oils from DWQ oilfield displays complicated molecular composition characteristics, including relative higher indices of Pr/Ph (1.4 ~ 4.26, with an average of 2.4), high concentration of light hydrocarbons and certain abundant pentacyclic triterpene and steranes. The C7 light hydrocarbon and isoprenoids ratios indicate the oils were derived from terrestrial and higher plant input in weak oxidizing and reducing environment. Most of the oils are among the mature oils in the study area, except a few samples that are identified as slightly biodegraded by C7 hydrocarbon. Three oil families are identified in DWQ oilfield of Kuqa depression by biomarker analysis and geochemical parameters. The family A shares the attributes with higher amount of tricyclic terpanes, such as C19- C20 tricyclic terpane, higher C24-tercyclic terpane, lower concentration of gammacerane (< 0.6) but poor diasteranes. Family C is characterized with lower content of C19-tricyclic terpane than C20 tricyclic terpane, low C24-tercyclic terpane than C23-tricycli terpane, relative high concentration of gammacerane (> 0.6) but poor diasteranes. The oils of family B are mixed from the two types, showing mixed features of family A and C. The results can shed light for the exploration of the studied area.

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“…In the Kuqa FTB, southern Tian Shan piedmont, over 10 km‐thick Meso‐Cenozoic strata were deposited and deformed during the late Cenozoic (X. Wang et al., 2011). Previous studies mainly focused on the FTB's deformation style (Izquierdo‐Llavall et al., 2018; S. Li et al., 2012, 2013; Neng et al., 2018; Qi et al., 2009; X. Wang et al., 2011; W. Wang et al., 2017; Z. Wu et al., 2014), lateral structural variation (Pla et al., 2019; W. Wang et al., 2020; Z. Zhang et al., 2019), and thermochronological constraints on the regional uplift and exhumation history within FTB (Chang et al., 2017; Dumitru et al., 2001; W. Yang et al., 2017; Yu et al., 2014). Moreover, based on geological mapping and reconstruction of cross sections, a few other studies also calculated the crustal shortening of the Kuqa FTB, indicating a westward increase of the regional crustal shortening (Burchfiel et al., 1999; Izquierdo‐Llavall et al., 2018; S. Li et al., 2012; L. Lu, Sun, et al., 2019; X. Wang et al., 2011; X. Yang, Deng, et al., 2008).…”

Section: Introductionmentioning

confidence: 99%

“…Wang et al, 2017;Z. Wu et al, 2014), lateral structural variation (Pla et al, 2019;W. Wang et al, 2020;, and thermochronological constraints on the regional uplift and exhumation history within FTB (Chang et al, 2017;Dumitru et al, 2001;W.…”

mentioning

confidence: 99%

Cenozoic Shortening and Propagation in the Eastern Kuqa Fold‐And‐Thrust Belt, South Tian Shan, NW China

Cheng

Chen

et al. 2023

Tectonics

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The India-Eurasia collision caused the uplift of the Tibetan Plateau and extensive intracontinental deformation over a broad area of Asia during the Cenozoic. Located more than 1,000-2,000 km to the north of this collision zone, the 2,500-km-long Tian Shan, with numerous peaks over 7,000 m, is a seismically active orogenic belt and has experienced Cenozoic tectonic reactivation and rapid uplift since the Miocene (

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Along-strike structural variation in a salt-influenced fold and thrust belt: Analysis of the Kuqa depression

Cited by 11 publications

References 28 publications

Hydrocarbon Accumulation Process and Mechanism in the Lower Jurassic Reservoir in the Eastern Kuqa Depression, Tarim Basin, Northwest China: A Case Study of Well Tudong 2 in the Tugerming Area

Hydrocarbon Accumulation Process and Mechanism in the Lower Jurassic Reservoir in the Eastern Kuqa Depression, Tarim Basin, Northwest China: A Case Study of Well Tudong 2 in the Tugerming Area

Geochemical characteristics and genetic families of crude oil in DWQ oilfield, Kuqa Depression, NW China

Cenozoic Shortening and Propagation in the Eastern Kuqa Fold‐And‐Thrust Belt, South Tian Shan, NW China

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