Controlling factors on the effectiveness of turbidite fan reservoir of the Meishan Formation, Qiongdongnan Basin

LI Jianping; XU Wei; YAN Zhuoyu; ZHANG Cheng; XIONG Lianqiao

doi:10.16562/j.cnki.0256-1492.2022090602

Marine Geology & Quaternary Geology > 2023 > 43(3): 157-166. > DOI: 10.16562/j.cnki.0256-1492.2022090602

LI Jianping，XU Wei，YAN Zhuoyu，et al. Controlling factors on the effectiveness of turbidite fan reservoir of the Meishan Formation, Qiongdongnan Basin[J]. Marine Geology & Quaternary Geology，2023，43(3)：157-166. DOI: 10.16562/j.cnki.0256-1492.2022090602

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Controlling factors on the effectiveness of turbidite fan reservoir of the Meishan Formation, Qiongdongnan Basin

1.
CNOOC Research Institute Co., Ltd., Beijing 100028, China
2.
CNOOC Enerteck-Drilling & Production Co., Zhangjiang 524057, China
3.
Hubei Key Laboratory of Marine Geology Resources, China University of Geosciences, Wuhan 430074, China

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Received Date: September 05, 2022
Revised Date: November 14, 2022
Available Online: June 25, 2023

Graphical Abstract

Abstract

Abstract

The turbidite fan of Miocene Meishan Formation in Qiongdongnan Basin is one of the main contributors of natural gas in the area. To increase the natural gas reserve and production in this area, the sedimentary mechanism, the controlling factors and prediction methods were studied. According to a large number of DST, geological fluid sampling, core and rotary sidewall coring measured data, and relevant enterprise standards, the turbidite fan reservoir of the could be divided into four levels of grade: high-quality, good, effective, and tight. The four levels correspond to high production, commercial production capacity, merely productive capacity, and dry layer. Results show that the type of turbidite fans and its internal composition, bottom current reformation, and reservoir effectiveness are key factors on reservoir prediction success. Fault-terrace basin floor fans, basin floor fans cut by canyon, and integral basin floor fans are three types of relatively good reservoirs; and bottom current reworking is important to improve the reservoir of middle fan and outer fan in open flow environment. For the basin floor fan cut by canyon, the lithological side seal needs to be focused in the future. For the integral basin floor fans, the reservoir pinch out shall be considered too. At present, the rate of reservoir prediction of the Meishan turbidite fans in this area is very low. The methods developed in this study shall be of great value to improve the success rate of reservoir prediction.
- turbidite fan,
- reservoir,
- main controlling factors,
- reservoir effectiveness,
- Meishan Formation,
- Qiongdongnan Basin

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References

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Controlling factors on the effectiveness of turbidite fan reservoir of the Meishan Formation, Qiongdongnan Basin