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Water Saturation Calculation and Fracture Type Identification of a Buried Hill Fractured Reservoir

Authors :
Zhongwei Wu
Zhaoping Li
Chuqiao Gao
Bin Zhao
Jinbo Wu
Source :
Lithosphere. 2021
Publication Year :
2021
Publisher :
GeoScienceWorld, 2021.

Abstract

A buried hill reservoir is a special type of bedrock reservoir, in which fractures are the important reservoir space and main percolation path. However, due to the characteristics of the buried hill reservoir such as deep burial depth and high formation pressure, the fracture width of deep formation is generally in micron level, and the randomness of spatial development brings great difficulties to logging identification and reservoir parameter calculation. Based on the fracture porosity and saturation model of the dual pore model, this paper puts forward the theory of identifying fracture type of buried hill fractured reservoir by using conductivity efficiency. The results show that (1) the fracture angle has no effect on the conductivity efficiency. And we cannot distinguish a high-angle fracture from a low-angle fracture by conductivity efficiency. (2) The values of porosity and water saturation are not directly related to the conductivity efficiency. But porosity and water saturation will affect the connectivity of water in the reservoir and indirectly affect the conductivity efficiency. (3) The conductivity efficiency of the network fracture is usually less than that of the dissolution fracture.

Details

ISSN :
19474253 and 19418264
Volume :
2021
Database :
OpenAIRE
Journal :
Lithosphere
Accession number :
edsair.doi...........f627c12fd10453da3ed7cd1ad646cac9
Full Text :
https://doi.org/10.2113/2021/4615776