辽河油田勘探阶段原油采收率研究

Study of crude oil recovery factor at Liaohe Oilfield exploration stage

如何正确评价油气田勘探的成果,并为开发提供可靠的物质基础,是可采储量研究工作者所追求的目标。随着中油股份公司海外成功上市及中国加入WTO,对我国储量评估工作与国际通用标准接轨已势在必行。因此,有必要对可采储量计算中的参数进行认真选取,对计算方法进行充分研究和总结。在不增加勘探工作量的前提下,尽可能将油气田可采储量计算得更加接近客观实际。在收集辽河油区已开发油田的182个开发单元的静、动态资料的基础上,对影响采收率的因素进行了分析,采用多元回归、灰色理论分析方法建立数学模型,经过分析筛选,得出了适合辽河油区不同类型油藏采收率类比标准序列及经验公式,为勘探阶段采收率的标定提供了依据。该公式适用性较好,有一定的推广应用价值。

To correctively evaluate the achievements of oil and gas field and provide a reliable material base for development is the goal of recoverable reserve researchers. It is imperative to conduct our reserve evaluation to meet the demand of international standard with the entry into WTO and successful public listing of PetroChina Limited Company. Therefore, it is necessary to select the parameters carefully in recoverable reserve calculation, and fully study and summarize the calculation methods. With no increase in exploration workload, we try to make the calculation of oil and gas field recoverable reserve more close to the objective and actual condition. Based on the collected static and dynamic data from 182 development units in the developed oilfields in Liaohe oil province, this paper analyzes the factors that influence recovery factor, and sets up mathematics models by adopting multiple regression and grey theory analysis. Through analysis and screening, recovery factor analogy standard sequence and empirical equation that fit for different kinds of reservoir types in Liaohe oil province are obtained, providing a basis for recovery factor calibration at exploration stage. This equation is of good applicability, and has certain spreading and application value.