油田开发全程储采比计算方法研究

Calculation method for reserve-production ratio in different development stages of oilfield development

油田储采比是衡量油田生产规模的关键指标,计算储采比对保证油田合理开发及制定国家能源战略具有重要意义。本文从储采比原始定义出发,结合上产阶段、稳产阶段及递减阶段累产油计算公式,产量增长率(或递减率)定义式,推导出了油田3个不同开发阶段储采比的计算公式。研究表明,在确定上年储采比及当年的产量增长率(或递减率)时,就可以计算出上产阶段(或递减阶段)当年的储采比;稳产阶段第n年储采比是稳产第1年储采比与稳产年限n-1之差。

Oil reserve-production ratio is a key index that describes the relationship between production scale and explored reserves. A ccurate calculation of reserve-production ratio has important guiding significance for ensuring reasonable development and making national long-term strategy objectives. Based on the original definition of reserve-production ratio,combined with the formula of cumulative oil production in the production stage, stable stage and decline stage, and the formula of production rising rate（or production decline rate）,the calculation methods of reserve-production ratio in three different development stages were derived. The study result indicates that the output of annual reserve-production ratio is determined, when production rising rate（or production decline rate）and year-ago reserveproduction ratio is known. The n years reserve-production ratio in stable phase is the difference between the 1 year reserve-production ratio and n-1.