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.
出处
《油气井测试》
2014年第5期9-11,75,共3页
Well Testing
基金
国家油气重大专项"低渗
特低渗油藏高产富集区预测技术"(2008ZX05013)内容
关键词
超高压
压力敏感
砂岩气层
产能预测
ultrahigh pressure,pressure sensitive,sandstone gas reservoir,productivity prediction
