摘要
国内大部分老油田,已经进入晚期高含水开发阶段,在后期加密过程中会采用水平井,从而新进水平井与直井形成立体开采形式;在不稳定注水广泛应用的背景下,本文对低渗油藏水平井与直井联合井网进行周期注水数值模拟,整合水平井和不稳定注水的优势,以五点法立体井网为例,确定连续注水转脉冲注水的最佳时机;以连续注入速度为基础,确定最佳注水波动幅度,优选联合井网注入周期,分析立体井网脉冲注水特点;利用流线模型分析立体井网常规注水与不稳定注水剩余油分布特点,从理论上分析五点水平井与直井立体井网脉冲注水效果。
Most of the domestic oil fields have entered into the high water-cut development stage, and in the subsequent infill development process the horizontal well will be used, thus the new horizontal wells and the old vertical wells will be combined in the three-dimensional form. Under the background that unstable water injection was widely used, numerical simulation of cyclic waterflooding in combination well pattern of horizontal wells and vertical wells in low permeability reservoirs was carried out to integrate the advantages of horizontal wells and unstable water injection. Taking a five-point stereo-well pattern as an example, the best opportunity to turn conventional water injection to unstable water injection was determined. On the basis of continuous injection rate, the best fluctuation range of injection rate was determined, meanwhile the optimal injection cycle of combined well pattern was selected, and characteristics of the pulsed water injection were analyzed. The streamline model was used to analyze the remaining oil distribution characteristics of conventional water injection and unstable water injection, the pulsed water injection effect was theoretically analyzed based on five-point stereo-well pattern.
出处
《辽宁化工》
CAS
2014年第8期1086-1088,1091,共4页
Liaoning Chemical Industry
关键词
立体井网
不稳定注水
数值模拟
采出程度
stereo-well pattern
unstable waterflooding
numerical simulation
oil recovery
