Petroleum evolution within the Tarim Basin, northwestern China: Insights from organic geochemistry, fluid inclusions, and rhenium–osmium geochronology of the Halahatang oil field

Gao, Xiang; Shen, Chuanbo; Selby, David; Feely, Martin; Zhu, Guangyou

doi:10.1306/05091917253

Cited by 16 publications

(4 citation statements)

References 81 publications

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“…Accurate hydrocarbon accumulation dating is an important issue in petroleum geology. Geochemical characteristics, fluid inclusions and reservoir bitumen provide evidences for petroleum accumulation history including hydrocarbon charge, physical adjustment and destroy (Hein, 2016;Ge et al, 2020;Ping et al, 2020;Su et al, 2020;Yang et al, 2021). In this study, we have compiled the timing of the formation of deep oil and gas reservoirs around the world, and oil and gas accumulation timing vary from 550 Ma to 12 Ma.…”

Section: Charging and Adjustment Of Deep Oil And Gas Reservoirs 221 C...mentioning

confidence: 99%

“…A great deal of emerging technical and analytical methods have been applied in hydrocarbon-related studies, and equip enormous potential to bring new insights into the above-mentioned challenges. Advances in radiogenic isotopic geochronology, especially the advent of carbonate U-Pb dating and oil/bitumen Re-Os dating, provide absolute ages in constraining the precise timing of hydrocarbon generation (Selby and Creaser, 2005;Finlay et al, 2011;Ge et al, 2020), migration and charging (Holdsworth et al, 2019;Rochelle-Bates et al, 2020;Cong et al, 2022), diagenetic sequences (Godeau et al, 2018;MacDonald et al, 2019), with high resolution which other techniques cannot compare. Development of new stable isotope tracers, such as organic and inorganic sulfur isotopes, clumped isotopes (Δ47, Δ18, etc.)…”

Section: Prospectsmentioning

confidence: 99%

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Enrichment Mechanism and Prospects of Deep Oil and Gas

Hao

2022

Acta Geologica Sinica (Eng)

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With the deepening of oil and gas exploration, the importance of depth is increasingly highlighted. The risk of preservation of storage space in deep reservoirs is greater than that in shallow and medium layers. Deep layers mean older strata, more complex structural evolution and more complex hydrocarbon accumulation processes, and even adjustment and transformation of oil and gas reservoirs. This paper systematically investigates the current status and research progress of deep oil and gas exploration around the world and looks forward to the future research focus of deep oil and gas. In the deep, especially the ultra-deep layers, carbonate reservoirs play a more important role than clastic rocks. Karst, fault•karst and dolomite reservoirs are the main types of deep and ultra-deep reservoirs. The common feature of most deep large and medium-sized oil and gas reservoirs is that they formed in the early with shallow depth. Fault activity and evolution of trap highs are the main ways to cause physical adjustment of oil and gas reservoirs. Crude oil cracking and thermochemical sulfate reduction (TSR) are the main chemical modification effects in the reservoir. Large-scale high-quality dolomite reservoirs is the main direction of deep oil and gas exploration. Accurate identification of oil and gas charging, adjustment and reformation processes is the key to understanding deep oil and gas distribution. High-precision detection technology and high-precision dating technology are an important guarantee for deep oil and gas research.

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Section: Charging and Adjustment Of Deep Oil And Gas Reservoirs 221 C...mentioning

confidence: 99%

Section: Prospectsmentioning

confidence: 99%

Enrichment Mechanism and Prospects of Deep Oil and Gas

Hao

2022

Acta Geologica Sinica (Eng)

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“…In this paper, on the basis of systematic sampling and research on the characteristics of the low-permeability sandstone reservoirs of the Mesozoic Yanchang Formation in the Zhijing-Ansai area [ 20 ], the microscopic petrographic observation of fluid inclusions, microthermometry characteristics, and burial and thermal history are used to discuss. The stages of oil and gas migration and charging in the Mesozoic Yanchang Formation and the determination of reservoir formation time [ 21 ]. The research results help to understand the oil and gas accumulation mechanism of the Yanchang Formation in the Zhijing Ansai area of the Ordos Basin, and can provide theoretical support for the next step of oil and gas exploration in favorable areas in this area.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of inclusions in chang 7 member and shale oil accumulation stages in Zhijing-Ansai area, Ordos Basin

Wu,

Wang,

et al. 2024

PLoS ONE

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In order to further clarify the shale oil accumulation period of the Chang 7 member of the Mesozoic Triassic Yanchang Formation in the Zhijing-Ansai area of the central Ordos Basin, Using fluid inclusion petrography analysis, microscopic temperature measurement, salinity analysis and fluorescence spectrum analysis methods, combined with the burial history-thermal history recovery in the area, the oil and gas accumulation period of the Chang 7 member of the Yanchang Formation in the Zhijing-Ansai area was comprehensively analyzed. Sixteen shale oil reservoir samples of the Mesozoic Triassic Yanchang Formation in seven typical wells in the study area were selected.The results show that the fluid inclusions in the Chang 7 member of Yanchang Formation can be divided into two stages. The first stage inclusions mainly develop liquid hydrocarbon inclusions and a large number of associated brine inclusions, which are mainly beaded in fracture-filled quartz and fracture-filled calcite. The fluorescence color is blue and blue-green, and the homogenization temperature of the associated brine inclusions is between 90–110°C. The second stage inclusions are mainly gas-liquid two-phase hydrocarbon inclusions, gas inclusions and asphalt inclusions. Most of them are distributed in the fracture-filled quartz, and the temperature of the associated brine inclusions is between 120–130°C. Fluid inclusions in Chang 7 member of the Yanchang Formation can be divided into two stages. The CO2 inclusions and high temperature inclusions in the Chang 7 member of the Yanchang Formation are mainly derived from deep volcanic activity in the crust.

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“…The asphaltene of crude oils has over 90% of Re and Os elements due to their organophilic characteristics (Mahdaoui et al, 2013) and almost represents the entire crude oil isotopic composition of Re and Os (Selby et al, 2007). The organic-rich geological samples related to hydrocarbon accumulation, such as source rocks and asphalt, can be directly tested and analyzed by Re and Os isotope dating for petroleum accumulation geochronology (Selby and Creaser, 2005;Liu et al, 2018;Ge et al, 2020;Wu et al, 2021). In this study, the asphalts were researched to explore the possible hydrocarbon sources and accumulation processes in the Ruoqiang Sag, combined with the source rocks of the drilling core and outcrops.…”

Section: Introductionmentioning

confidence: 99%

Source and geological significance of Jurassic asphalt in the Ruoqiang Sag of Southeast Depression, Tarim Basin, Northwestern China

Lan,

Bai,

Yang

et al. 2024

Front. Earth Sci.

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The Southeast Depression of the Tarim Basin has a very low petroleum exploration degree, and currently, no industrial oil and gas have been discovered. Many hydrocarbon shows exist in the Ruoqiang Sag, where hydrocarbon sources and accumulation processes are unclear. Only two potential Jurassic hydrocarbon source rocks developed in the Ruoqiang Sag, the Yangye (J2y) lacustrine mudstone of the Middle Jurassic and the Kangsu (J1k) coal-bearing mudstone of the Lower Jurassic. In this study, the Jurassic asphalt found in the QD1 well, combined with the source rocks of drilling cores and outcrops, was used to explore the possible hydrocarbon source and forming process in the Ruoqiang Sag using oil-source correlation and hydrocarbon accumulation geochronology methods. The asphalts have lower light and heavy rare earth fractionation than the J2y mudstone, and the total rare earth element (ΣREE) content, chondrite-normalized curves, and δEu and Y/Ho values are similar to those of the J1k mudstone, especially for the J1k coal. The n-alkane ratios of the carbon preference index and the odd-to-even preference (OEP) of Jurassic asphalts are greater than 1.0, indicating that its source rock has experienced low thermal evolution. All Jurassic samples have similar source-related biomarkers but different maturity-related parameters, and the thermal evolution degree of asphalt is close to the J1k mudstone and coal but slightly higher than the J2y mudstone. Meanwhile, rhenium–osmium isotopes show the asphalts are formed in 192+30/−45 Ma, which is similar to the J1k sedimentation time. The asphalts contain coal macerals and probably derived from the asphaltene precipitated by the J1k coal during the early coalification. The low abundance of 25-norbornanes with a non- or slight petroleum biodegradation degree indicates the asphalt was generated relatively late and migrated into the J2y formation along the faults, possibly accompanied by the striking activities of the Altyn Tagh Fault during the Neotectonics movement. This study provides evidence for the J1k coal-bearing strata serving as the effective source rock in the Ruoqiang Sag and increases confidence for Jurassic petroleum exploration in the Southeast Depression of the Tarim Basin. The structural and lithological traps near hydrocarbon source stoves, where Jurassic strata were deeply buried and far from the Altyn Tagh Range, are favorable oil and gas exploration targets.

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Petroleum evolution within the Tarim Basin, northwestern China: Insights from organic geochemistry, fluid inclusions, and rhenium–osmium geochronology of the Halahatang oil field

Cited by 16 publications

References 81 publications

Enrichment Mechanism and Prospects of Deep Oil and Gas

Enrichment Mechanism and Prospects of Deep Oil and Gas

Characteristics of inclusions in chang 7 member and shale oil accumulation stages in Zhijing-Ansai area, Ordos Basin

Source and geological significance of Jurassic asphalt in the Ruoqiang Sag of Southeast Depression, Tarim Basin, Northwestern China

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