基于开采技术的重油-油砂可采储量计算方法

Exploitation mode oriented heavy oil-oil sand recoverable reserves calculation method

基于重油-油砂的特殊开采技术,建立重油-油砂可采储量计算方法。首先根据不同开采技术油层筛选标准(包括油层埋深、单一油层厚度、孔隙度和含油饱和度等4个参数)及不同开采技术的标定采收率计算单一开采技术下重油-油砂可采储量;然后计算不同开采技术组合可采储量及区块最大可采储量;最后建立评价区块重油-油砂可采储量数据库。该方法与国际通用的PRMS储量分级体系具有较好的对应关系。应用该方法对委内瑞拉重油带J区块M层重油可采储量进行分级计算,区块冷采、蒸汽驱、SAGD单一开采技术可采储量分别为4.06×108t、15.23×108t和7.40×108t,最大技术可采储量为15.97×108t,建立了区块储量数据库,为制定区块开发方案提供了依据。

Based on special exploitation mode of heavy oil-oil sand, this paper established a recoverable reserves calculation method for heavy oil-oil sand. First, calculate recoverable reserves of single exploitation mode according to oil layer selection criterion including four parameters of buried depth, single layer thickness, porosity and oil saturation for different exploitation models. Second, calculate recoverable reserves for different exploitation model combination and the max recoverable reserves of the block; Last, set up heavy oil-oil sand recoverable reserves database. The method has great correlation with PRMS reserves evaluation system. The method has been used in the heavy oil classification evaluation for larger M of the J block in Venezuela heavy oil belt, the recoverable reserves are 4.06×10^8 t, 15.23×10^8t and 7.40×10^8t respectively by cold production, steam drive and steam-assisted gravity drainage, and the max recoverable reserves are 15.97×10^8t, which provides reserves basement for block development.