摘要
现有的多井试井(脉冲试井,干扰试井)的分析技术是建立在均质油藏基础上的,而对非均质情况的研究则只局限于具有解析解的渗流模型。针对各向同性的径向非均质油藏,提出了非线性回归分析方法使用有限差分解和连续函数逼近理论,根据试井获取的压力—时间数据,利用受约束的非线性最小二乘回归技术拟合观察井的实测压力与计算压力,从而确定井间流动系数的分布,并进而对平面非均质性进行描述。虚拟测试和现场实例测试表明,所提出的分析方法是可行的,且试井次数较少。
The interpretation methods of multiwell testing (including interference testing or pulse testing) are usually used for homogeneous isotropic reservoirs or heterogeneous reservoirs with flow model of analytical solution. In this paper, however, multiwell testing analysis of heterogeneous isotropic reservoir is considered, and a non-linear regression technique is developed based on the method of constrained least square. With this technique, the value of transmissivity between two wells is determined, and therefore heterogeneity of the reservoir is described.
出处
《江汉石油学院学报》
CSCD
北大核心
1992年第1期55-58,80,共5页
Journal of Jianghan Petroleum Institute
关键词
非均质油气藏
试井
非线性回归
heterogeneous reservoir
well testing
pulse testing
flow coefficient
difference methods
non-linear regressions
