Geochemical characteristics and their gas and oil source correlation implication in the Tugeerming area of the Kuqa Depression, Tarim Basin, China

Liu, Ruhong; Li, Jian; Xiao, Zhongyao; Jin, Li; Zhang, Haizu; Yu-hong, LU; Zhang, Baoshou; Ma, Wanyun; Dejiang, Li; Liu, Mancang

doi:10.1016/j.jnggs.2019.06.001

Cited by 8 publications

(8 citation statements)

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“…In terms of the geochemical characteristics and sources of deep natural gas in the Kuqa depression, the previous scholars have done a lot of research work. It is found that the natural gas is mainly coal‐type gas, the source rocks are distributed in the Jurassic high‐over‐mature coal measure strata, and the lacustrine crude oil cracking gas of the Triassic also contributes a small amount of natural gas (Li, Zeng, et al, 2021; Liu et al, 2019; Wei et al, 2021). The oil and gas in the Kuqa depression basically come from the same source rock system, but they are the products of different evolution stages.…”

Section: Resultsmentioning

confidence: 99%

“…Comparison of isotopic composition of saturated hydrocarbons between Yangxia Formation oil and source rocks in northern piedmont tectonic belt (Liu et al, 2019). …”

Section: Discussionmentioning

confidence: 99%

“…On the southern slope of the Kuqa depression, some hydrocarbon-bearing reservoirs developed in the Palaeozoic, such as the Cambrian, Ordovician and Silurian. F I G U R E 7 Comparison of isotopic composition of saturated hydrocarbons between Yangxia Formation oil and source rocks in northern piedmont tectonic belt (Liu et al, 2019).…”

Section: Carbon Isotope Ratios and Saturated Hydrocarbon Mass Spectru...mentioning

confidence: 99%

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Characteristics of orderly hydrocarbon accumulation of deep reservoirs in Kuqa Depression and its exploration implications

Yang

Dong

et al. 2023

Geological Journal

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The Kuqa depression is an important oil and gas production area in western China, and there are abundant natural gas resources in the deep and ultra‐deep tight reservoirs. In this study, the accumulation law of deep oil and gas in the Kuqa depression has been systematically discussed based on the analysis of geochemical parameters, reservoir fluid inclusions and the recovery of burial‐thermal evolution history in different structural zones. The results show that the lacustrine mudstones of the Triassic Huangshanjie and Upper Jurassic Qiakemake formations in the Kuqa depression are the main oil‐generating source rocks, and the coal‐measure source rocks of the Middle and Lower Jurassic are the main gas‐generating source rocks. The oil and gas in the northern tectonic belt originated from the Huangshanjie and Yangxia formations have the characteristics of ‘lower‐source and upper‐reservoir’ and ‘self‐generation and self‐storage’. The source rocks in the central tectonic belt are of high maturity and mainly generate natural gas, and a small amount of crude oil is derived from mudstones of the Jurassic Qiakemake Formation. The oil and gas in the southern slope belt are mainly derived from the source rocks of the Huangshanjie Formation, followed by the Jurassic source rocks. The ordered accumulation of oil and gas in the Kuqa depression is controlled by the effective spatiotemporal matching of multi‐stage tectonic evolution and hydrocarbon generation evolution of multi‐source rocks. Three spatiotemporal ordered hydrocarbon accumulation series have been proposed: early near‐source accumulation, late far and near‐source accumulation, and late upper‐near source accumulation. The piedmont belt is dominated by the near‐source continuous accumulation mode, the thrust belt is dominated by the ultra‐late upper source accumulation mode, and the slope belt is dominated by the late far‐source accumulation mode. Therefore, future exploration will focus on the tight lithologic reservoirs in the northern piedmont belt, the structural reservoirs in the central structural belt, and the unconformity hidden reservoirs in the southern slope belt.

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Section: Resultsmentioning

confidence: 99%

“…Comparison of isotopic composition of saturated hydrocarbons between Yangxia Formation oil and source rocks in northern piedmont tectonic belt (Liu et al, 2019). …”

Section: Discussionmentioning

confidence: 99%

Section: Carbon Isotope Ratios and Saturated Hydrocarbon Mass Spectru...mentioning

confidence: 99%

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Characteristics of orderly hydrocarbon accumulation of deep reservoirs in Kuqa Depression and its exploration implications

Yang

Dong

et al. 2023

Geological Journal

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“…Qualitative and quantitative analyses of biomarkers in source rocks or crude oil are performed through gas chromatography-mass spectrometry experiment to reveal the type of parent material and the sedimentary environment during deposition of the organic matter (Alberdi et al 2001;Guo et al 2015;Tang et al 2019). Furthermore, Liu et al (2019) showed that the measured maturity of Jurassic oil was approximately 1.0%, which indicated that the biomarkers in the extracted oil samples were helpful for identifying the geologic features of the organic matter.…”

Section: Identification Of Source Rocks For Oil Generationmentioning

confidence: 97%

Fluid inclusion characteristics of the Jurassic reservoir and hydrocarbon accumulation process in the eastern Kuqa Depression, Tarim Basin

Wan

Gong

Zhuo

et al. 2022

J Petrol Explor Prod Technol

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There has been significant progress in hydrocarbon exploration of the eastern Kuqa Depression, Tarim Basin, whose Jurassic reservoir is a key area for abundant hydrocarbon with poorly understood accumulation mechanism. This study conducts an integrated investigation comprising petrographic observations, microthermometry measurements, and fluorescence spectroscopy analyses on fluid inclusions to reconstruct hydrocarbon accumulation history in the Jurassic reservoir. These conclusions are combined with biomarker characteristics to reveal the burial history and thermal evolution of the study area. The results show that (1) there were two episodes of oil charging that occurred at 6~4 Ma and 4~2 Ma, respectively. The QGF experiment response and yellow fluorescent oil inclusions indicated that low-maturity medium crude oil from the Triassic source rocks was expelled into the upper Ahe Formation. In the second charging stage, some mature oil generated from Jurassic source rocks was charged into the reservoir of the Kezilenuer and Yangxia formations, while the condensate from the Triassic source rocks was migrated upward to the Jurassic reservoir, consistent with smaller QGF-E intensity values and blue-white fluorescent petroleum inclusions. (2) There were two kinds of hydrocarbon accumulation models including the lower-generation and upper-storage and the self-generated and self-stored models. (3) It was noted that active faults were developed under the compression stress to provide channels for hydrocarbon vertical migration. Moreover, the early reservoir was destroyed resulting from the strata denudation and a large amount of crude oil was escaped to the surface. The findings of this study can help for better understanding of hydrocarbon accumulation mechanism in the eastern Kuqa Depression and provide theoretical guidance for further oil and gas exploration.

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“…(A) Geographic location of the Tarim Basin in western China; (B) location map showing the tectonic units of the Tarim Basin and the Kuqa Depression adjacent to the South Tianshan Mountains; (C) location of the Well Tudong 2 in the Tugerming area of the eastern of Kuqa Depression (modified from ref ).…”

Section: Introductionmentioning

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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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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Geochemical characteristics and their gas and oil source correlation implication in the Tugeerming area of the Kuqa Depression, Tarim Basin, China

Cited by 8 publications

References 4 publications

Characteristics of orderly hydrocarbon accumulation of deep reservoirs in Kuqa Depression and its exploration implications

Characteristics of orderly hydrocarbon accumulation of deep reservoirs in Kuqa Depression and its exploration implications

Fluid inclusion characteristics of the Jurassic reservoir and hydrocarbon accumulation process in the eastern Kuqa Depression, Tarim Basin

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

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