渤海水驱砂岩油田井网密度与采收率关系研究

A Research on the Relationship between Well Pattern Density and Water Drive Recovery Factor in Bohai Oilfield

海上油田受开发环境、经济、平台寿命等因素的限制,相较于陆上油田,井距大、采油速度高。因此,利用陆上油田采收率经验公式计算海上油田采收率时,往往误差较大,无法准确预测油田的潜力。利用渤海水驱砂岩油田80个典型的独立开发单元资料,采用最小二乘法回归了不同井网密度下渤海油田经验公式,计算结果表明,通过本文回归的公式计算的采收率与油田标定采收率误差很小,可以用来计算渤海水驱油田的采收率。渤海油田经验公式为科学评估海上油田加密潜力提供了简便的工具,为油田合理规划目标提供了依据。

Offshore oilfield,compared to the onshore oilfield,well spacing larger and oil recovery rate higher by the development environment,economy and platform life limited are taken.So if it is calculated by empirical formula of onshore recovery factor,it has much lager and is unable to evaluate recovery potential.Based on the data of 80 independent development block in Bohai water flood oilfield,empirical formula of recovery factor on Bohai oilfield,using the method of least squares,is regressed.The calculation results show that,the error of the regression formula of the recovery factor is very small can be used to calculate the recovery factor for water flood field.It provides a convenient tool for the scientific assessment of drilling potential,and the basis for rational planning of goal.