CAJ | 학술논문

研究了油水两相流动条件下的压力恢复试井问题。推导出含水饱和度偏微分方程和压力分布偏微分方程；在回归出单井平均相对渗透率曲线的基础上，通过求两个偏微分方程的数值解，求出了径向上的含油饱和度分布、地层渗透率K和平均地层压力；由新引进的变量AD和 BD之间的直线关系，求出了井筒存储系数C值。同时，给出了井筒污染系数S值。通过与 Gringarten图版法的解释结果对比，表明本文给出方法的解释结果比较准确可靠。
연구료유수량상류동조건하적압력회복시정문제。추도출함수포화도편미분방정화 압력분포편미분방정；재회귀출단정평균상대삼투솔곡선적기출상，통과구량개편미분방정적수 치해，구출료경향상적함유포화도분포、지층삼투솔K화평균지층압력；유신인진적변량AD화 BD지간적직선관계，구출료정통존저계수C치。동시，급출료정통오염계수S치。통과여 Gringarten도판법적해석결과대비，표명본문급출방법적해석결과비교준학가고。
This paper studied the problems in pressure build-up test under the condition of water and oil two-phase flow,derived the water saturation partial differential equation and pressure distribution partial differential equation. Based on regressing the curves of average relative permeability in single well, that the oil saturation distribution, permeability (K) and average formation pressure have been gotten through seeking numerical solution to this two equations. By the linear relationship between newly introduced variable AD and BD, wellbore storage coefficient (C) has been reached,meanwhile, wellbore' s damage coefficient (S) has been given. Compared with the interpretation results of Gringarten chart board, it is indicated that the results provided by this paper are comparatively accurate and reliable.