新增探明储量技术采收率主控因素

Mam control factors of technical recovery of newly incremental proven reserves

在申报探明可采储量时,关键是采收率的取值,由于油藏处在勘探评价或开发初期,受资料所限,采收率只能是应用经验公式法、经验取值法、类比法和数值模拟法求取,然后综合确定一个值,在求取过程中关键是明确此阶段采收率的主控因素,从而相对准确地求取采收率值。通过分析,明确了探明储量技术采收率的主控因素为油藏驱动类型、储层渗透率、储层非均质性、原油地下粘度及井网密度,为此阶段科学评价采收率奠定了基础。

The key is the value of recovery efficiency when proven recoverable reserves are declared. Due to the limit of data in early stage of exploratory evaluation or development, the methods of calculating recovery efficiency are only empirical formula, experience value,comparison and numerical simulation. The value of the recovery efficiency will be fixed according to the comprehensive results. The key in evaluation is to know the main control factors of the recovery efficiency at the stage,and then the relatively accurate recovery efficiency may be gained. Drive type of oil reservoir, reservoir permeability, reservoir heterogeneity, viscosity of oil in place and well density are the main control factors of technical recovery of the proven reserves during that period. It will lay a foundation for evaluating the recovery efficiency scientifically in this period.