Analysis of reservoir-forming conditions and key controlling factors of Huagang Formation in the central anticlinal belt of Xihu Sag of East China Sea—Taking the reservoir H3 for example

LI Kun; ZHANG Pei; ZHANG Ping; LI Qian; WAN Lifen; XI Minhong

doi:10.16562/j.cnki.0256-1492.2019070408

Marine Geology & Quaternary Geology > 2020 > 40(5): 127-135. > DOI: 10.16562/j.cnki.0256-1492.2019070408

LI Kun, ZHANG Pei, ZHANG Ping, LI Qian, WAN Lifen, XI Minhong. Analysis of reservoir-forming conditions and key controlling factors of Huagang Formation in the central anticlinal belt of Xihu Sag of East China Sea—Taking the reservoir H3 for example[J]. Marine Geology & Quaternary Geology, 2020, 40(5): 127-135. DOI: 10.16562/j.cnki.0256-1492.2019070408

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Analysis of reservoir-forming conditions and key controlling factors of Huagang Formation in the central anticlinal belt of Xihu Sag of East China Sea—Taking the reservoir H3 for example

Institute of Exploration and Development, SINOPEC Shanghai Offshore Oil & Gas Company, Shanghai 200120, China

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Received Date: July 03, 2019
Revised Date: May 08, 2020
Available Online: October 20, 2020

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Abstract

Abstract

A great breakthrough in oil and gas exploration has been made recently from the Huagang Formation in the central anticline belt of the Xihu Sag. Several medium to large oil and gas fields have been discovered. However, the gas column height and fullness ratio of trap differs from each other which suggests that every reservoir has its own key controlling factors. Based on seismic and drilling data, this paper selects the H3 reservoir as a case to study the accumulation conditions of source rocks, traps and combination of reservoir-cap systems. Also this paper sums up the key controlling factor of each reservoir by dissecting four typical reservoirs. The results show that the oil and gas accumulated in H3 reservoir come from the source rocks in Pinghu Formation; the reservoir and caprocks matched each other excellently, and the key factors to control oil and gas accumulation are the effective migration system and fault sealing, and the reservoir preservation condition has great influence on hydrocarbon accumulation.
- H3 reservoir,
- key controlling factors,
- Huagang Formation,
- central anticline belt,
- Xihu Sag

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References (23)

References

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Analysis of reservoir-forming conditions and key controlling factors of Huagang Formation in the central anticlinal belt of Xihu Sag of East China Sea—Taking the reservoir H3 for example