对Butler SAGD无因次相似准数计算公式的质疑及新公式的建立

Question on calculation formula of dimensionless similar criterion number of Butler′s SAGD and establishment of new formula

陈元千¹ 刘牧心 2

中国石油勘探开发研究院，北京 100083 中国地质大学（北京）能源学院，北京 100083

无因次相似准数，是根据油藏地质与开发方案的要求，制作室内物理模型的重要参数。Butler于1991年提出的无因次相似准数计算公式，已成为我国各提高采收率重点实验室制作物理模型的重要依据。然而，应当指出，Butler的SAGD无因次相似准数计算公式，是一个没有经过理论推导直接写出来的公式，存在很大的不确定性和不可靠性。这将影响到物理模型制作的科学性和实验数据的可利用性。文中基于对双水平井SAGD产量公式的研究，提出了与流度、相似尺寸和单位流量的压差消耗等因素有关的无因次相似准数计算公式。

The dimensionless similar criterion number, which is based on the requirements of reservoir geology and development program of the field, is an important parameter for making physical model. Since Butler proposed the calculation formula of dimensionless similar criterion number in 1991, the formula has become an important basis for making physical models in many enhanced oil recovery laboratories. However, we would point out that Butler′s formula is not carried out theoretically; there are a lot of uncertainty and unreliability, which will affect the accuracy of the physical model and experimental data. Based on the author′s research of SAGD production rate formula, a new dimensionless similar criterion number formula is proposed in this paper, which is related to mobility (K/μo), similar size (Lb/h) and pressure difference loss per unit flow rate (Δp/Qh).

10.6056/dkyqt201601011