超深超高压裂缝性砂岩气层产能预测方法研究
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摘要
根据气层渗流理论和裂缝性压力敏感地层的特性,建立了适合于定压内边界封闭外边界条件下超深超高压裂缝性砂岩气层的不定常渗流模型,推导出超深超高压裂缝性砂岩气层的不定常渗流模型的有限差分方程。通过计算确定了压力敏感系数对产能曲线的影响,得到了确定超深超高压裂缝性砂岩气层的压力敏感参数的方法。经对某气田高压深层气井的实例分析,得到了较好的分析结果,同时也验证该文所建立的超深超高压裂缝性砂岩气层的不定常渗流模型的正确性。
According to gas reservoir seepage theory and crack pressure sensitive stratum characteristics,the unsteady seepage model in ultrahigh pressure crack sandstone gas reservoir with constant pressure inside boundary and closed outside boundary has been built to derive the finite difference equation of unsteady seepage model of ultrahigh pressure crack sandstone gas reservoir. The pressure sensitive parameter influence on productivity curve is determined by calculation and the method how to determine the pressure sensitive parameter is derived. The example analysis of a ultrahigh pressure gas well has obtained a good result and proved the correct of the built unsteady seepage model in ultrahigh pressure crack sandstone gas reservoir.
According to gas reservoir seepage theory and crack pressure sensitive stratum characteristics,the unsteady seepage model in ultrahigh pressure crack sandstone gas reservoir with constant pressure inside boundary and closed outside boundary has been built to derive the finite difference equation of unsteady seepage model of ultrahigh pressure crack sandstone gas reservoir. The pressure sensitive parameter influence on productivity curve is determined by calculation and the method how to determine the pressure sensitive parameter is derived. The example analysis of a ultrahigh pressure gas well has obtained a good result and proved the correct of the built unsteady seepage model in ultrahigh pressure crack sandstone gas reservoir.
引文
[1]刘曰武,陈维良,刘清泉.高压深层裂缝性油气藏中不定常渗流的数值研究[J].中国科学(G辑):物理学力学天文学,2009,39(4):606-616.
[2]Terzaghi K.Theoretical Soil Mechanics.New York:Wiley,1943.
[3]王玉普(译).气藏工程[M].北京:石油工业出版社,2007.
[4]Hagoort J.气藏工程原理[M].北京:石油工业出版社,1992.
[5]H Huang,J Ayoub.Applicability of the Forchheimer Equation for Non-Darcy Flow in Porous Media[C]//SPE,2006:102715.
[6]葛家理,宁正福,刘月田,等.现代油藏渗流力学原理[M].北京:石油工业出版社,2001.
[7]杨继盛.采气工艺基础[M].北京:石油工业出版社,1989.
[2]Terzaghi K.Theoretical Soil Mechanics.New York:Wiley,1943.
[3]王玉普(译).气藏工程[M].北京:石油工业出版社,2007.
[4]Hagoort J.气藏工程原理[M].北京:石油工业出版社,1992.
[5]H Huang,J Ayoub.Applicability of the Forchheimer Equation for Non-Darcy Flow in Porous Media[C]//SPE,2006:102715.
[6]葛家理,宁正福,刘月田,等.现代油藏渗流力学原理[M].北京:石油工业出版社,2001.
[7]杨继盛.采气工艺基础[M].北京:石油工业出版社,1989.