The Jurassic clastic reservoirs in the Jiulongshan area, northern Qaidam Basin, Qinghai

WANG Meng; YANG Yongheng; WANG Yetong; JIANG Yun; SUN Guoqiang; MA Jinye

Sedimentary Geology and Tethyan Geology > 2019 > 39(2): 94-102.

WANG Meng, YANG Yongheng, WANG Yetong, JIANG Yun, SUN Guoqiang, MA Jinye. The Jurassic clastic reservoirs in the Jiulongshan area, northern Qaidam Basin, Qinghai[J]. Sedimentary Geology and Tethyan Geology, 2019, 39(2): 94-102.

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The Jurassic clastic reservoirs in the Jiulongshan area, northern Qaidam Basin, Qinghai

1. Northwest Institute of Eco-Environments and Resources, Chinese Academy of Sciences, Lanzhou 730000, Gansu, China;
2. University of the Chinese Academy of Sciences, Beijing 100049, China;
3. Research Institute of Petroleum Exploration and Development, Qinghai Oil Field Company, CNPC, Dunhuang 736202, Gansu, China

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Received Date: March 17, 2019
Revised Date: April 27, 2019
Published Date: June 29, 2019

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Abstract

Abstract

The petrological, physical and diagenetic characteristics and porosity evolution of the Jurassic clastic reservoirs are based on the examination of the representative core samples and thin sections, scanning electron photomicrographs, physical properties and mercury-injection data on the Jurassic clastic reservoirs in the Jiulongshan area, northern Qaidam Basin, Qinghai. The Jurassic clastic reservoirs consist mainly of coarse-grained sandstones, medium-grained sandstones and fine-grained sandstones. The cement types contain the carbonate cements, siliceous cements and authigenic clay minerals. The porosity types include the residual primary intergranular pores and solution openings, and the porosity and permeability are well correlated. The reservoir rocks have low compositional maturity and moderate to poor textural maturity, with the point-line contact types. At present, the reservoir rocks are tentative to be in Phase A of the anadiagenetic stages.
- reservoir rock,
- diagenesis,
- Jurassic,
- Jiulongshan area

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References

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