Application of 3D digital core flow simulation technique in the study of gas flow in fractured-vuggy gas reservoirs in Sichuan Basin

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  • 1.Exploration and Development Research Institute,PetroChina Southwest Oil and Gas Field Company,Chengdu 610041,China;
    2.National Energy High-sour Gas Reservoir Exploitation and R & D Center,Chengdu 610041,China

Received date: 2017-01-20

  Revised date: 2017-08-30

  Online published: 2017-09-10

Abstract

Due to the high pressure of carbonate fractured-vuggy reservoirs in Sichuan basin,it is extremely hard to keep the integrity of core samples from main production layers during coring.This problem leads to very few flow experiments which can be carried out.Digital core is a new technology for reservoir microstructure analysis and micro-flow characteristics research which can simulate seepage process in formation condition and calculate the relevant parameters without destroying the core.This technique can be applied to the flow experimental study of carbonate fractured-vuggy reservoirs in the Sichuan Basin.In this paper,based on core CT scan results,3D models of digital cores have been established.By using numerical simulation based on finite element method,the flow law in condition of stratigraphy has been revealed through analysis.Result shows fractures are the most important flow channel in the fractured-vuggy reservoirs.Gas flowed in sequence of vuggy,matrix,fracture,export and flow energy loss mainly occurs in the tight matrix between the fracture and the cave.This research demonstrates the 3D digital core is a useful method for analyzing reservoir seepage law and mechanism.And it can provide necessary data which provide supports for making appropriate countermeasures in gas reservoir development.
 

Cite this article

Yan You-jun,Li Long-xin,Xu Wei,Chang Cheng,Deng Hui,Yang Liu . Application of 3D digital core flow simulation technique in the study of gas flow in fractured-vuggy gas reservoirs in Sichuan Basin[J]. Natural Gas Geoscience, 2017 , 28(9) : 1425 -1432 . DOI: 10.11764/j.issn.1672-1926.2017.08.018

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