四川盆地涪陵地区龙马溪组含气页岩段上部气层平面非均质性特征及其发育主控因素

包汉勇; 孟志勇; 李凯; 常振; 郁飞; 易雨昊; 赵天逸

doi:10.3799/dqkx.2023.154

Volume 48 Issue 7

Jul. 2023

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Bao Hanyong, Meng Zhiyong, Li Kai, Chang Zhen, Yu Fei, Yi Yuhao, Zhao Tianyi, 2023. Plane Heterogeneity Characteristics and Main Controlling Factors of Development of Upper Gas Layer in Gas-Bearing Shale of Longmaxi Formation in Fuling Area, Sichuan Basin. Earth Science, 48(7): 2750-2763. doi: 10.3799/dqkx.2023.154

Citation:

Bao Hanyong, Meng Zhiyong, Li Kai, Chang Zhen, Yu Fei, Yi Yuhao, Zhao Tianyi, 2023. Plane Heterogeneity Characteristics and Main Controlling Factors of Development of Upper Gas Layer in Gas-Bearing Shale of Longmaxi Formation in Fuling Area, Sichuan Basin. Earth Science, 48(7): 2750-2763. doi: 10.3799/dqkx.2023.154

Citation:

Bao Hanyong, Meng Zhiyong, Li Kai, Chang Zhen, Yu Fei, Yi Yuhao, Zhao Tianyi, 2023. Plane Heterogeneity Characteristics and Main Controlling Factors of Development of Upper Gas Layer in Gas-Bearing Shale of Longmaxi Formation in Fuling Area, Sichuan Basin. Earth Science, 48(7): 2750-2763. doi: 10.3799/dqkx.2023.154

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Plane Heterogeneity Characteristics and Main Controlling Factors of Development of Upper Gas Layer in Gas-Bearing Shale of Longmaxi Formation in Fuling Area, Sichuan Basin

doi: 10.3799/dqkx.2023.154

Bao Hanyong^{1, 2
,
,},
Meng Zhiyong^{2
,
,
,},
Li Kai²,
Chang Zhen²,
Yu Fei^{1, 2},
Yi Yuhao²,
Zhao Tianyi^{1, 3}

1.
State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100089, China
2.
Exploration and Development Research Institute of Sinopec Jianghan Oilfield Company, Wuhan 430223, China
3.
Sinopec Exploration and Development Key Laboratory of Shale Oil and Gas, Beijing 100089, China

Received Date: 2022-09-03
Publish Date: 2023-07-25

Abstract

Abstract

A set of organic-rich shale was well-developed at the bottom of Wufeng Formation-Longmaxi Formation in Fuling Area. Based on shale quality and gas-bearing property, this shale reservoir can be vertically subdivided into 9 sublayers, and the lower ①‒⑤ sublayers of high-quality gas-bearing shale are the main layers of development. In 2017, the layering development and adjustment were launched in Jiaoshiba Block, focusing on the upper middle- and low- grade shale gas layers (⑥‒⑨ sublayers) of the first member of Longmaxi Formation. Good results have been achieved through this work. However, this layer has strong plane heterogeneity in terms of quality and thickness, hindering its layering development and adjustment. In this paper, we present a systematic study on the submarine paleogeomorphology and hydrodynamic conditions. Its plane heterogeneity characteristics and main controlling factors for development are clarified through systematic research. The upper gas layer changed from mixed shale facies in the southern and northern Fuling Area to felsic shale facies in the central Zilichang-Baitao area. The shale quality became slightly worse in the central Zilichang-Baitao area. The ⑦ sublayer on the south and north margin of central Zilichang-Baitao area showed a distinct decrease in thickness and its first half was absent. Meanwhile, the ⑦‒⑨ sublayers were also absent in some well regions presenting NE-trending banded distribution. Tectonic volcanism, sea level eustacy, seabed paleogeomorphology, terrigenous input and bottom currents jointly controlled the plane heterogeneity characteristics of this upper gas layer.
- Wufeng Formation‐Longmaxi Formation,
- upper gas layer,
- shale gas,
- reservoir heterogeneity,
- main controlling factor,
- bottom current,
- seabed paleogeomorphology,
- Fuling,
- Sichuan Basin

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References(45)

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Plane Heterogeneity Characteristics and Main Controlling Factors of Development of Upper Gas Layer in Gas-Bearing Shale of Longmaxi Formation in Fuling Area, Sichuan Basin

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