论文部分内容阅读
大庆油田的油层岩性物性差异较大。主力油层储油物性较好,分布面积较大。但也存在一些储油物性差,渗透率在100～300毫达西,分布面积小,形态变化大的差油层。这些油层在目前采用的层系和井网条件下开采,大部分还没有有效地发挥作用。尽管油田注水开发已经20年,但是根据测试资料分析,差油层见水的厚度只有30％左右,还有30～50％的厚度,基本上没有动用。随着油层含水量的上升,主力油层水淹状况日益严重,怎样挖掘差油层的潜力,已成为保持油田继续稳产的一个重要问题。为了研究差油层的动用条件和注水开采的特点,在小井距试验区南井组萨Ⅲ5+6层进
Daqing Oilfield lithology reservoir properties vary widely. The main oil reservoir properties are better, the distribution area larger. However, some oil reservoirs with poor oil physical properties and permeability of 100-300 millidarcies, small distribution area and large morphological changes exist. Most of these reservoirs are mined under the strata and well patterns currently used and have not yet been effective. Although oilfield waterflooding has been developed for 20 years, according to the test data analysis, the thickness of the water in the poor reservoir is only about 30%, and the thickness of 30-50% is basically unused. With the increase of oil content in the reservoir, flooding of the main reservoir is becoming more and more serious. How to tap the potential of poor reservoir has become an important issue to keep the oilfield stable. In order to study the conditions of poor oil reservoirs and the characteristics of water injection,