化学驱合理井网密度的计算方法--以正方形井网为例

Computing method to determine reasonable well spacing density with chemical flooding-taking square well spacing as an example

根据化学驱开发方案设计的需要,在化学驱增油量预测的基础上,建立了化学驱合理井网密度与经济极限井网密度的计算方法,研究了化学驱井网密度与提高采收率及投资回收期之间的关系。当井网密度大于20口/km2时,化学驱提高采收率的增加趋势变缓。随着投资回收期的增大,合理井网密度和极限井网密度都在减小。应用推导的公式计算了双河油田化学驱合理井网密度及经济极限井网密度,为化学驱开发方案的制定和实施提供了理论依据。

According to the needs of plan design of the chemical flooding,a computing method for determining reasonable well density and e-conomic limit well density was established based on the prediction of incremental oil by the chemical flooding. The relationship among well density and enhanced oil recovery by the chemical flooding and payback period was researched. When the well spacing density is more than 20wells/km ,the incremental trend of enhancing oil recovery by the chemical flooding becomes slow. The reasonable and economic limit well density will be smaller both with the longer payback period. Deduced formula was applied to the calculation of the reasonable and economic limit well density by the chemical flooding in Shuanghe Oilfield,which provided theoretical basis for design and implementation of development plans by the chemical flooding.