低渗透油田提捞采油合理提捞周期的确定

根据低渗透油田提捞采油生产特点,考虑油层存在启动压力梯度和提捞井均压裂投产的实际,分提捞井注水收效和不收效两种情况,推导出了提捞井产量计算理论公式,能够计算提捞井目前和未来的提捞产量,克服了经验公式需要试井资料且不能预测未来提捞产量的缺陷。通过大庆朝阳沟油田提捞试验区实例验证,给出的理论公式计算误差在5%以内,能够满足工程计算的需要。在此基础上,结合经济评价,给出了提捞采油合理提捞周期的确定方法,计算了不同油价下的合理提捞周期,为油田经济有效开发提供了依据。

The Determination of Profitable Cycle Time for Bailing Oil Production in Low Permeability Oilfield

According to the feature of bailing oil production and considering the existence of start-up pressure gradient and the actual situation of fracturing in bailing wells production of low permeability oilfield,theoretical equations were derived under the situations of valid and invalid injection,which could be used to calculate both present and future productions of bailing wells.This method overcomes the defects of empirical methods which need well test data,and can not predict future bailing production.Testi...