The geological characteristics of the large- and medium-sized gas fields in the South China Sea

Gongcheng Zhang; Dongdong Wang; Lei Lan; Shixiang Liu; Long Su; Long Wang; Wu Tang; Jia Guo; Rui Sun

doi:10.1007/s13131-021-1754-x

Volume 40 Issue 2

Apr. 2021

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Gongcheng Zhang, Dongdong Wang, Lei Lan, Shixiang Liu, Long Su, Long Wang, Wu Tang, Jia Guo, Rui Sun. The geological characteristics of the large- and medium-sized gas fields in the South China Sea[J]. Acta Oceanologica Sinica, 2021, 40(2): 1-12. doi: 10.1007/s13131-021-1754-x

Citation:

Gongcheng Zhang, Dongdong Wang, Lei Lan, Shixiang Liu, Long Su, Long Wang, Wu Tang, Jia Guo, Rui Sun. The geological characteristics of the large- and medium-sized gas fields in the South China Sea[J]. Acta Oceanologica Sinica, 2021, 40(2): 1-12. doi: 10.1007/s13131-021-1754-x

Citation:

Gongcheng Zhang, Dongdong Wang, Lei Lan, Shixiang Liu, Long Su, Long Wang, Wu Tang, Jia Guo, Rui Sun. The geological characteristics of the large- and medium-sized gas fields in the South China Sea[J]. Acta Oceanologica Sinica, 2021, 40(2): 1-12. doi: 10.1007/s13131-021-1754-x

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The geological characteristics of the large- and medium-sized gas fields in the South China Sea

doi: 10.1007/s13131-021-1754-x

Gongcheng Zhang^{1, 2},
Dongdong Wang^{1
,
,},
Lei Lan²,
Shixiang Liu²,
Long Su^{3, 4},
Long Wang²,
Wu Tang²,
Jia Guo²,
Rui Sun²

1.
College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China
2.
CNOOC Research Institute Co., Ltd., Beijing 100028, China
3.
Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
4.
Key Laboratory of Petroleum Resources, Gansu Province, Lanzhou 730000, China

Funds: The National Petroleum Major Projects under contract Nos 2016ZX05026, 2011ZX05025 and 2008ZX05025; the National Natural Science Foundation Major Research Program of China under contract No. 91528303; the National Program on Key Basic Research Project of China (973 Program) under contract No. 2009CB219400; the Key Laboratory Project of Gansu Province under contract No. 1309RTSA041; the National Natural Science Foundation of China under contract No. 41872172; the SDUST Research Found under contract No. 2018TDJH101.

More Information

Corresponding author: E-mail: wdd02_1@163.com
Received Date: 2020-03-23
Accepted Date: 2020-07-17

Available Online: 2021-04-02

Publish Date: 2021-04-02

Abstract

Abstract

By the end of 2019, more than 220 gas fields had been discovered in the South China Sea. In order to accurately determine the geological characteristics of the large- and medium-sized gas fields in the South China Sea, this study conducted a comprehensive examination of the gas fields. Based on the abundant available geologic and geochemical data, the distribution and key controlling factors of the hydrocarbon accumulation in the South China Sea were analyzed. The geological and geochemical features of the gas fields were as follows: (1) the gas fields were distributed similar to beads in the shape of a “C” along the northern, western, and southern continental margins; (2) the natural gas in the region was determined to be composed of higher amounts of alkane gas and less CO₂; (3) the majority of the alkane gas was observed to be coal-type gas; (4) the gas reservoir types included structural reservoirs, lithologic reservoirs, and stratigraphic reservoirs, respectively; (5) the reservoir ages were mainly Oligocene, Miocene, and Pliocene, while the lithology was mainly organic reef, with some sandstone deposits; and (6) the main hydrocarbon accumulation period for the region was determined to be the late Pliocene-Quaternary Period. In addition, the main controlling factors of the gas reservoirs were confirmed to have been the development of coal measures, sufficient thermal evolution, and favorable migration and accumulation conditions.
- coal-type gas,
- coal measures,
- thermal evolution,
- hydrocarbon traps,
- organic reefs,
- South China Sea

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References(47)

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