多层合采断块油藏配产配注优化方法研究

发布时间：2018-01-29 17:50

本文关键词： 断块油藏多层合采配产配注均衡驱替　出处：《中国石油大学(华东)》2015年硕士论文　论文类型：学位论文

【摘要】：我国东部一般形成的是纵向上含有较多层系的陆相沉积油田,层间和平面上都具有很强的非均质性,由于采油工艺的水平有限,矿场上通常将临近的几个层作为一套层系共同采用一套井网进行开发,目的就是为了提高单井的产能,这种开发方式我们又称为多层合采。本文以断块油藏典型井组为对象,并以此为研究对象分析均衡驱替的影响因素。然后基于水电相似理论,按照等值渗流阻力法计算多层合采断块油藏最大液量即确定了合理的液量界限。接着以实现平面均衡驱替为目标,以非活塞式水驱油理论和油藏数值模拟为基础,提出适用于单层开发和多层合采断块油藏的配产配注方法。最后提出以实现全区产油量最大化为目标的全区油藏配产配注方法,采用非线性最优化方法,优化各单井的产量。研究结果表明,影响单井配产配注的因素很多,以垂直于构造线方向上的一注两采井组为例:地层倾角越大、地层渗透率越大、不同井区油层厚度差异越大、初始含水饱和度差异越大,不同油井液量分配差异越大;且随着调控时间的增加,不同油井所需液量差异越小。而全区油藏的配产配注能够有效增大全区产油量,相比于单纯的提液有明显优势。
[Abstract]:In the eastern part of China, continental sedimentary oil fields with more layers in the longitudinal direction are formed, which have strong heterogeneity both in the interlayer and in the plane, because of the limited level of the oil recovery technology. In order to improve the productivity of a single well, the adjacent layers are usually developed as a set of layers by a set of well pattern. This development method is also called multilayer combined production. This paper takes typical well groups of fault-block reservoir as the object of study and analyzes the influencing factors of balanced displacement. Then based on the hydropower similarity theory. According to the equivalent percolation resistance method to calculate the maximum fluid volume of multilayer recovery fault block reservoir, the reasonable liquid flow limit is determined, and the goal is to realize plane equilibrium displacement. Based on non-piston water flooding theory and reservoir numerical simulation. This paper presents a method of distribution and injection for single-layer development and multi-layer fault block reservoirs. Finally, a new method of distribution and injection is proposed, which is aimed at maximizing the oil production in the whole area, and adopts nonlinear optimization method. The research results show that there are many factors that affect the production and distribution of single well. Take one injection and two production wells perpendicular to the direction of structural line as an example: the greater the formation dip angle, the greater the formation permeability. The greater the reservoir thickness in different well areas, the greater the difference of initial water saturation and the greater the distribution of fluid in different wells. And with the increase of control time, the difference of fluid demand of different oil wells is smaller, and the distribution and injection of oil reservoir in the whole area can effectively increase the oil production in the whole area, which has obvious advantages compared with the pure liquid extraction.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE347

【相似文献】