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Article
Enrichment mechanism and resource potential of shale-type helium: A case study of Wufeng Formation-Longmaxi Formation in Sichuan Basin
China’s helium resource is highly dependent on overseas imports. Organic-rich and U/Th-rich shale reservoirs generally contain helium, and although the helium content is low, the total reserve is large. Theref...
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Article
Long-term cycles of the Solar System concealed in the Mesozoic sedimentary basin record
Mounting evidence indicates that the orbital period of the solar system’s movement through the Milky Way has had a controlling effect on processes of the Earth’s system throughout the Phanerozoic. To decipher ...
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Article
Accumulation mechanism of mantle-derived helium resources in petroliferous basins, eastern China
A series of marginal-sea basins and fault-depression basins were formed in eastern China under the background of subduction of the West Pacific plate. Different types of helium-rich natural gas reservoirs (He>...
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Article
The first extra-large helium-rich gas field identified in a tight sandstone of the Dongsheng Gas Field, Ordos Basin, China
Helium gas is a scarce but important strategic resource, which is usually associated with natural gas. Presently, only one extra-large helium-rich gas field has been found in China: the Hetianhe Gas Field in t...
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Article
Organic-rich formation and hydrocarbon enrichment of lacustrine shale strata: A case study of Chang 7 Member
Lacustrine shale is an important target for the exploration of unconventional oil and gas in China beyond marine shale gas. However, the formation environment of lacustrine shale differs from that of marine sh...
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Article
Stable carbon and oxygen isotope data of Late Ediacaran stromatolites from a hypersaline environment in the Tarim Basin (NW China) and their reservoir potential
The occurrence of Precambrian stromatolites is closely related to the ancient seawater composition and the evolution of life. It is also a potential oil and gas reservoir. In what kind of environment the strom...
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Article
Open AccessFractionation of carbon and hydrogen isotopes of TSR-altered gas products under closed system pyrolysis
Thermochemical sulfate reduction (TSR) is common in marine carbonate gas reservoirs, leading to complicated isotope characteristics of TSR-altered gas. This study aims to better understand how TSR affects the ...
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Article
Source and distribution of mercury in natural gas of major petroliferous basins in China
Based on the analysis of the natural gas samples of 146 wells from four major petroliferous basins of China, the source and distribution of mercury in natural gas in major petroliferous basins of China were id...
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Article
An Upper Crustal Ophiolite Remnant within the Feather River Ultramafic Belt, California: Tectonomagmatic Origins and Implications for Its Evolution
The 150-km-long Feather River ultramafic belt (FRB) of the northern Sierra Nevada, California, consists of serpentinized ultramafic rocks, gabbroic rocks, with lesser amounts of amphibolitic rocks. The gabbroi...
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Article
The scientific connotation of oil and gas formations under deep fluids and organic-inorganic interaction
As a relatively stable craton block in the earth system, the petroliferous basin is influenced by the evolution of the earth system from the early development environment of source rocks, hydrocarbon formation...
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Article
Potential petroleum sources and exploration directions around the Manjar Sag in the Tarim Basin
Since the discovery of the Tahe oilfield, it has been controversial on whether the main source rock is in the Cambrian or Middle-Upper Ordovician strata. In this paper, it is assumed that the crude oil from th...
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Article
Presence of carboxylate salts in marine carbonate strata of the Ordos Basin and their impact on hydrocarbon generation evaluation of low TOC, high maturity source rocks
The total organic carbon (TOC) in the marine source rock of the Ordos Basin mostly ranges from 0.2% to 0.5%. The industrial standard commonly states that the TOC value has to be no less than 0.5% (0.4% for hig...
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Article
Mercury concentration in natural gas and its distribution in the Tarim Basin
Here I collected natural gas samples from 41 industrial gas wells in the Tarim Basin, and studied the mercury distribution in the area. My data show that there is certain regularity in the distribution of merc...
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Article
Controls of Late Jurassic-Early Cretaceous tectonic event on source rocks and seals in marine sequences, South China
Thermal evolution of source rocks and dynamic sealing evolution of cap rocks are both subjected to tectonic evolution. The marine sequences in South China have experienced superposed structural deformation fro...
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Article
Natural gas geochemistry and its origins in Kuqa depression
According to gas compositional and carbon isotopic measurement of 114 gas samples from the Kuqa depression, accumulation of the natural gases in the depression is dominated by hydrocarbon gases, with high gas ...
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Article
Geochemical characteristics of pyrolysis gas from epimetamorphic rocks in the northern basement of Songliao Basin, Northeast China
The Xushen gas field, located in the north of Songliao Basin, is a potential giant gas area for China in the future. Its proved reserves have exceeded 1000×108 m3 by the end of 2005. But, the origin of natural ga...
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Article
Geochemical characteristics and origin of gases from the Upper, Lower Paleozoic and the Mesozoic reservoirs in the Ordos Basin, China
The Ordos Basin, the second largest sedimentary basin in China, contains the broad distribution of natural gas types. So far, several giant gas fields have been discovered in the Upper and Lower Paleozoic in t...
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Article
Hydrogen isotope composition of natural gases from the Tarim Basin and its indication of depositional environments of the source rocks
By measuring carbon and hydrogen isotope compositions for C1, C2 and C3 of 74 gas samples, natural gases from the Tarim Basin can be divided into six groups on the basis of their origins: (1) coal-type gas derive...
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Article
Map** QTLs for nitrogen uptake in relation to the early growth of wheat (Triticum aestivum L.)
The objective of this study was to map QTLs for N uptake (NUP) in wheat, and to investigate factors influencing NUP. Two independent field trials with low N (LN) and high N (HN) treatments were conducted in th...
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Article
Map** QTLs for Phosphorus-Deficiency Tolerance at Wheat Seedling Stage
Soil phosphorus (P) deficiency is one of the major limiting factors to crop production throughout the world. It is an important strategy to breed varieties with improved P-deficiency tolerance for sustainable ...
