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油田进入高含水期开采后,针对动用不好的低渗透油层进行层系调整是一项重要的稳产措施。划分调整层系应以油层的沉积特征和砂体形态为依据。组合为一套调整层系的渗透率级差,对沉积时河流作用较弱的油层应小于3,河流作用较强的油层可小于5。空气渗透率小于300毫达西的亲水油层和300毫达西以上的亲油油层应划分为不同的调整层系。
After the oilfield enters the high water cut period, it is an important stabilizing measure to adjust the stratification system for the poorly-utilized low-permeability oil layer. Dividing the adjustment layer should be based on the sedimentary characteristics of the reservoir and the sand body morphology. Combination of a set of adjustment of the permeability of the level difference between the deposition of the river is weak weaker reservoir should be less than 3, the river layer of strong oil can be less than 5. Hydrophilic reservoirs with an air permeability of less than 300 millidarcies and oleophilic reservoirs above 300 millidarcies should be divided into different adjustment strata.