【摘要】 针对列宾逊函数仅考虑单相渗流,且现有研究只适用于欠饱和油藏及稳态渗流情形的缺陷,拓展了列宾逊函数的定义,并利用流度函数的推广式推导了裂缝性油藏在溶解气驱状态下的广义Vogel方程,其基本形式与Wiggins解析式类似。采用广义流入动态关系研究了不同变形系数下污染程度及油藏压力的压敏变化规律。结果表明,超完善井及高油藏压力状态下的完善井压力敏感性最强,控制合理的压力水平是防止溶解气驱阶段产能急剧下降的关键。更多还原

【Abstract】 With respect to the deficiency that Lbinson function is only fit for single phase flow and the research existed is only suitable for time invariant seepage in undersaturated reservoir,the definition of Lbinson function was widened,and a universal Vogel Equation was deduced for dissolved gas drive in the fractured reservoir by using extension of mobility function.The form of the universal IPR is similar to Wiggins’s analyses. Sensitivity of formation pressure and damage degree was researched by universal IPR when stress of formation was changed.Results show that the improved wells and wells in high formation pressure are most sensitive to stress change.It is very important that controlling a reasonable pressure level to avoid reducing production greatly when depletion drives.更多还原