U-Pb Detrital Zircon Geochronology of Late Triassic to Early Jurassic Sandstones in the Northwestern Junggar Basin and its Implications

Lü, Xianguo; Xie, Xiangyang; Zhang, Shuncun; Busbey, Arthur B.; Zhang, Shengyin; Du, Shanshan; Sun, Guoqiang; Shi, Jingli

doi:10.4172/2381-8719.1000320

Cited by 2 publications

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“…The Junggar basin, located in the northwest part of China, covers an area of about 130000 km 2 (Figure 1(a)) [21]. The basin is a superimposed basin developed from late Paleozoic to Cenozoic [22,23]. In late Carboniferous, the western Junggar basin experienced intense collision between the Junggar plate and the Kazakhstan plate [22,24].…”

Section: Geological Settingmentioning

confidence: 99%

Reservoir Overpressure in the Mahu Sag, Northwestern Junggar Basin, China: Characteristics and Controlling Factors

Sun

Zheng

et al. 2023

Geofluids

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Reservoirs with overpressure are of great importance for petroleum exploration where commercial production can be usually obtained. Studying the distribution characteristics and controlling factors of reservoir overpressure is crucial for further petroleum exploration. In this study, we investigate the vertical and planar distribution of reservoir overpressure in the Mahu sag, northwestern Junggar basin by analyzing measured pressure data from well testing of oil reservoirs. In the Baikouquan-Jiamuhe Formation, reservoir overpressure is widely distributed, and the pressure coefficient increases from the margin to the center of the sag and generally increases with the increasing altitude. Crossplot analysis of density and velocity in the Triassic strata and Permian Fengcheng Formation is conducted to further investigate the influence of undercompaction in the Mahu sag for the first time. The result suggests that undercompaction has little influence on reservoir overpressure, whereas fluid charging may play a vital role in the development of overpressure. Our research further conducted the analyses of distribution of source rocks and oil-source correlation. The results further confirmed that hydrocarbon generates from the Fengcheng Formation and charges into other reservoirs, suggesting that hydrocarbon generation and fluid charging are the main mechanism of reservoir overpressure.

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Section: Geological Settingmentioning

confidence: 99%

Reservoir Overpressure in the Mahu Sag, Northwestern Junggar Basin, China: Characteristics and Controlling Factors

Sun

Zheng

et al. 2023

Geofluids

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show abstract

“…The detections of lineaments are very useful in an economic and socioeconomic perspective for groundwater and oil exploration, but also for risk assessment. Moreover, in a primary research study, Lu [3] investigated the geological complexity of the Junggar basin (China) with the aim to document local sources and tectonical settings of the Triassic-Jurassic clastic rocks in the northwest margin including absolute dating of igneous rocks, rock geochemistry, and U-Pb detrital zircon geochronology. The results dated postcollision landforms and evolutionary aspects like the change from a single source to mix multiple sources of sediments in parts of the area as well as detailed information about the spread and magnitude of deposited sediments in the basin.…”

Section: Editorialmentioning

confidence: 99%

Geophysical Research in a Changing Environment

Hauer¹

2017

J Geol Geophys

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U-Pb Detrital Zircon Geochronology of Late Triassic to Early Jurassic Sandstones in the Northwestern Junggar Basin and its Implications

Cited by 2 publications

References 0 publications

Reservoir Overpressure in the Mahu Sag, Northwestern Junggar Basin, China: Characteristics and Controlling Factors

Reservoir Overpressure in the Mahu Sag, Northwestern Junggar Basin, China: Characteristics and Controlling Factors

Geophysical Research in a Changing Environment

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