Derivation and Practice of the New Gas Flooding Characteristic Curve of Reservoir with Gas Injection Flooding

doi:10.11885/j.issn.1674-5086.2017.04.23.01

Abstract

Abstract: Because the conventional gas flooding characteristic curve fails to effectively describe actual seepage fluid (injected gas) in stratum and displaced crude oil, displacement process of gas injection development is analyzed and oil and gas seepage characteristics of miscible flooding and immiscible flooding are represented, respectively. Based on the steady seepage theory, the relational expression of the actual seepage fluid (injected gas) in stratum and displaced crude oil is derived, which is a semi-logarithmic function of cumulative gas injection volume and cumulative oil output; this is termed the new gas flooding characteristic curve, and its applicable conditions are analyzed. Relevant examples are applied to study the effect of changes to the injection production pattern and displacement mechanism on the characteristics of gas flooding curve. Under the condition of a given volume of gas injection, this curve can be used to accomplish long-term and stage-yield prediction, and can be applied at the initial stages of gas injection development.

Key words: gas flooding characteristic curve, gas injection, miscible flooding, immiscible flooding, displacement mechanism

CLC Number:

TE341

YUAN Zhiwang, YANG Baoquan, YANG Li, GU Wenhuan, SHANG Fanjie. Derivation and Practice of the New Gas Flooding Characteristic Curve of Reservoir with Gas Injection Flooding[J]. 西南石油大学学报(自然科学版), 2018, 40(2): 135-141.

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