论文部分内容阅读
油气田开发过程大体可以划分为三个阶段:产量上升阶段、稳定阶段、产量递减阶段。在递减阶段可以用产量递减模型预测储量和产量。一般分析模型都是基于Arps经验公式:指数、双曲线与调和模型(其中对于采收率,指数模型和调和模型分别有低估和高估两个相反的趋势)。Li和Horne经理论和实验研究,得出一个基于流体流动机理的模型——Li-Horne模型。该模型得出采收速度与采收率的倒数呈线性关系,同时考虑两相流体特性,如相对渗透率和毛细管压力值,增加了递减模型的通用性。本文的主要目的是从理论上分析这几种递减模型,并用现场油气田的开采数据验证它们的可行性,比较分析各个模型结果之间的差别。
Oil and gas field development process can be roughly divided into three stages: the stage of rising production, stable stage, production decline stage. Yield reduction models can be used to predict reserves and yields during the descending phase. The general analysis models are based on Arps empirical formulas: exponential, hyperbola, and harmonic models (where two opposite trends are underestimated and overestimated for oil recovery, exponential, and harmonic models, respectively). Li and Horne theoretical and experimental study, come to a model based on the fluid flow mechanism - Li-Horne model. The model shows that the recovery rate is linearly related to the reciprocal of oil recovery, and the versatility of the decreasing model is also taken into account when considering the characteristics of two-phase fluids such as relative permeability and capillary pressure. The main purpose of this paper is to theoretically analyze these types of decreasing models and validate their feasibility with field oil and gas production data. The differences between the results of each model are compared and analyzed.