蒸汽吞吐效果预测及注汽参数优化方法研究

A method of predicting recovery effectiveness and optimizing injection parameters in steam soak.

数值模拟是稠油油藏开发的有力工具，但它需要较多的人力和物力。当对新区的多个油藏进行开发效果预测时，仅用数值模拟是困难的。为此，提出了一种简单的预测蒸汽吞吐效果的方法，它以ＭａｒｘＬａｎｇｅｎｈｅｉｍ模型为基础，是在ＢｏｂｅｒｇＬａｎｔｚ模型基础上发展起来的解析解模型。同时提出了一种应用加权方法考虑多个生产指标的优化方法。以此为基础，在ＰＣ机的Ｗｉｎｄｏｗｓ３．ｘ和Ｗｉｎｄｏｗｓ９５环境下开发了相应的软件。应用结果表明：预测模型具有较高的精度；优化方法具有较好的适用性和可操作性。该软件为油藏工程师提供了一个预测蒸汽吞吐效果和优化注汽参数的工具。图２表２参４（郭海莉摘）

The numerical simulation is an effective means of design for development of heavy oil reservoirs, but its shortcoming lies in the cost and the time. It is obviously unrealistic to adopt the numerical simulation especially when many designs and predictions are conducted in a newly exploited area. So, the purpose of this paper is to develop a more simply feasible method to predict the results of steam soak and to optimize the parameters of steam injection. The model in this paper bases on the Marx Langenheim model and Boberg Lantz model and is improved to make it more feasible to predict the results of steam soak. The authors also put forward a method in which some weight factors are considered to optimize the parameters of steam injection of steam soak. In addition, a software that runs under Windows 3.x or Windows 95 in PC is developed to make such prediction and optimization. An instance is present to test the precision of this prediction model, the feasibility of the optimum method and the applicability of the software. The result indicates that: The prediction model in this paper has higher precision to predict results of steam soak; The method used to optimize parameter of steam injection is more feasible and practical and the software is a better tool for a reservoir engineer to predict results of steam soak and optimize the parameters of steam injection.