Editorial office of ACTA PETROLEI SINICA ›› 2000, Vol. 21 ›› Issue (1): 60-63.DOI: 10.7623/syxb200001011
• Oil Field Development • Previous Articles Next Articles
LIU Xiang-ping1
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刘想平1, 蒋志祥2, 刘翔鹗2, 郭尚平2
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Abstract: At present the Vogel's study methodology, in which an inflow performance relationship (IPR) curve for a solution-gas-drive well is generated at a constant recovery factor, the dimensionless IPR curve can then be obtained, which has been applied to prepare IPRs of solution-gas-drive horizontal wells based on numerical reservoir simulation. The research in this paper discovered that the production processes have a significant influence on performance of a solution-gas-drive reservoir, namely, the average reservoir pressures are not equal when the productions with different flowing bottom-hole pressures reach the same recovery factor. Therefore, there is a drawback in current methodlology of preparing IPR curve based on the numerical simulation calculations. An improved methodology is proposed that the IPR curve of a horizontal well producing from a solution-gas-drive reservoir is firstly prepared at a constant average reservoir pressure, the dimensionless IPR curve is then generated. Based on the new methodology, 3-D flow calculations for a wide variety of solution-gas-drive reservoir models are made. How the concavity of dimensionless IPR curves varies with the decrease in the average reservoir pressure is found. Then a new equation is presented to fit the dimensionless IPR curves of solution-gas-drive horizontal wells.
Key words: numerical simulation, inflow performance relationships, solution-gas-drive reservoir, horizontal well, equation
摘要: 目前,根据数值模拟计算,研究溶解气驱油藏水平井向井流动态关系时,都是沿用Vogel研究方法即制作一定采出程度下水平井IPR曲线,然后无因次化得到无因次IPR曲线.经研究发现溶解气驱油藏动态受生产过程的影响较大,即用不同的流压生产,当达到相同的采出程度时,油藏平均压力并不相等.故前人用数模制作无因次IPR曲线的方法存在较大的局限性,对此提出了用数模研究溶解气驱油藏水平井无因次IPR曲线时,应先制作油藏平均压力为定值时的IPR曲线,然后再无因次化的新方法.按此方法对一系列溶解气驱油藏模型进行了三维流动模拟计算,总结出了无因次IPR曲线的曲度随油藏平均压力变化的规律,提出了描述溶解气驱油藏水平井无因次IPR曲线的新的统一方程.
关键词: 数值模拟, 溶解气驱油藏, 水平井, 向井流动态关系, 方程
CLC Number:
TE319
LIU Xiang-ping. NUMERICAL SIMULATION OF INFLOW PERFORMANCE RELATIONSHIPS FOR SOLUTION-GAS-DRIVE HORIZONTAL WELLS[J]. Editorial office of ACTA PETROLEI SINICA, 2000, 21(1): 60-63.
刘想平, 蒋志祥, 刘翔鹗, 郭尚平. 溶解气驱油藏水平井IPR的数值模拟[J]. 石油学报, 2000, 21(1): 60-63.
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