THE STUDY OF CHANNEL SEDIMENT ARCHITECTURE AND EVOLUTION PATTERN OF RESERVOIR IN NIGER BASIN

YANG Xipu; CHEN Xiao; FENG Xiaofei; YANG Baoquan; LIU Fei; ZHAO Xiaoming; GE Jiawang

doi:10.16028/j.1009-2722.2021.092

2021 Vol. 37, No. 10

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Article navigation > Marine Geology Frontiers > 2021 > 37(10): 49-57

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YANG Xipu, CHEN Xiao, FENG Xiaofei, YANG Baoquan, LIU Fei, ZHAO Xiaoming, GE Jiawang. THE STUDY OF CHANNEL SEDIMENT ARCHITECTURE AND EVOLUTION PATTERN OF RESERVOIR IN NIGER BASIN[J]. Marine Geology Frontiers, 2021, 37(10): 49-57. doi: 10.16028/j.1009-2722.2021.092

Citation:

YANG Xipu, CHEN Xiao, FENG Xiaofei, YANG Baoquan, LIU Fei, ZHAO Xiaoming, GE Jiawang. THE STUDY OF CHANNEL SEDIMENT ARCHITECTURE AND EVOLUTION PATTERN OF RESERVOIR IN NIGER BASIN[J]. Marine Geology Frontiers, 2021, 37(10): 49-57. doi: 10.16028/j.1009-2722.2021.092

THE STUDY OF CHANNEL SEDIMENT ARCHITECTURE AND EVOLUTION PATTERN OF RESERVOIR IN NIGER BASIN

1.
China National Offshore Oil International Co., Ltd., Beijing 100028, China
2.
School of Earth Science and Technology, Southwest Petroleum University, Chengdu 610500, China

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Corresponding author: FENG Xiaofei, fxf0916@163.com

Received Date: 11 April 2021

Publish Date: 28 October 2021

Abstract

Abstract

As an important type of reservoir in deep water, the deep sea channel is extremely rich in oil and gas resources. In recent years, it has become a key area for deep sea oil exploration and development. However, it is still very difficult to identify and characterize the internal architecture boundaries of a channel. Based on 3D seismic, well logging and core data, the internal structural boundaries of the West African X reservoir channel are successfuly difined by this paper, as the channel evolutionary model is established. Research shows that the boundaries of the channel system in the study area can be defined by the differences in seismic facies characteristics. In a deep sea channel system, there are three types of boundaries: confined, semi-confined and unconfined; the boundaries of a composite channel can be defined according to the principle of “vertical staging” and “lateral zoning”, whereas the boundary of a single channel can be identified and characterized by changes in the amplitude of channel boundary. There are two migration modes: unilateral migration and downstream swing migration on plane, and unidirectional lateral migration on section. The channel characterized by lateral migration and the downstream swing section presents the characteristics of multi-phase swing and overlap of channels. The evolution of the channel system can be divided into four stages: initial formation, rapid development, stable development, and disappearance of the channel, corresponding to a complete sea level change cycle.
- deep sea channel /
- channel architecture /
- boundary recognition /
- evolution pattern /
- controlling factors

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References

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