摘要
应用油藏开发前期和开发中后期密闭取芯分析资料开发动态资料 ,研究文 2 5东块沙二下油藏主力含油层系水淹特征及储层物性变化。研究表明 :油层水淹导致储层孔渗分异更加明显 ,主要表现为油层主流动喉道决定的有效孔隙体积减少 ,驱油效率下降 ,无水采油期变短。这正是该油藏有关油井液量大。
The data of trap core analysis at the early, middle and late periods of reservoir exploitation was used to develop dynamic data. The submerged features of oil-bearing formation at Lower Shaer Segment of East Wen 25 and the reservoir changes were studied. The results of the study showed that the submergence of oil reservoir has made permeation of storage formation hole more obvious, which mainly minimized the effective holes that could determine the flow of the reservoir, thus reducing the oil-driving efficiency and shortening the oil production period. These were the reasons that explained why this reservoir had a large pool of oil but the production was not increasing obviously.
