Theoretical Analysis of Low Permeability Composite Reservoir Using#br#
Finite Element Method

doi:10.11885/j.issn.1674-5086.2014.09.26.02

Abstract

Abstract:

Low permeability reservoir has strong heterogeneity and poor property，and stimulation is often needed to achieve
industrial productivity. Based on the heterogeneous reservoirs development practices and the relationship between added resistance
gradient and displacement pressure gradient and mobility，a well test model of added resistance gradient of composite
reservoir is established and solved by finite element method. Then the characteristic curves are gained and analyzed. The
results show that differences between the composite reservoir area have a significant impact on the dynamic characteristics of
the bottom hole pressure. Because of the added resistance gradient，dimensionless pressure and pressure derivative in log-log
well test plot goes upward gradually，but the amplitude is lower than that of the traditional pseudo threshold pressure gradient
method.

Key words: low permeability reservoir, composite reservoir, finite element method, non-linear flow, added resistance gradient

CLC Number:

TE312

ZHANG Liehui1*, ZHANG Ruihan1, JIANG Hexu2, KONG Ling2, SHE Juan2. Theoretical Analysis of Low Permeability Composite Reservoir Using#br# Finite Element Method[J]. 西南石油大学学报(自然科学版), 2016, 38(4): 1-8.

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Theoretical Analysis of Low Permeability Composite Reservoir Using#br# Finite Element Method

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