在分析大庆外围油田低丰度油藏探明储量分布特点的基础上, 总结了松辽盆地北部低渗透油藏探明储量含油面积圈定的主要原则和方法, 通过解剖典型区块开发前后面积变化, 论证了井控密度对圈定探明储量含油面积的影响, 认为松辽盆地北部低渗透油藏, 探明储量含油面积合理圈定的井控密度取决于砂体规模和油藏类型。在进入岩性油藏评价阶段, 探井、评价井合理的井控密度应提高到0.5～1.0 口/km²。

Based on the analysis of distribution characteristics of proved reserves of low abundance reservoirs in Daqing peripheral oilfield, the main principles and methods for determining oil-bearing area of proved reserves of low permeability reservoirs in northern Songliao Basin are summarized. According to the change of area after the exploitation in typical blocks, the influence of wells per square kilometer on the determination of oil-bearing area is analyzed. The quantity of drilling wells per square kilometer is considered to be controlled by the size and shape of sand and the type of reservoir in northern Songliao Basin. It should be increased to 0.5 to 1.0 per square kilometer in the evaluation stage for lithologic reservoirs.