CAJ | 학술논문

根据边界层理论,运用三次函数形式对特低渗岩心试验曲线进行拟合分析,在此基础上,运用微分线性描述方法,建立考虑边界层及启动压力梯度影响的特低渗储层渗流阻力梯度的数学模型,得到渗流阻力梯度与驱替压力梯度及渗透率的关系图版.结果表明,渗流阻力梯度随驱替压力梯度增加而降低,随渗透率减小而增大,且渗透率越小,渗流阻力梯度增幅越大,其非线性变化特征越明显.
근거변계층이론,운용삼차함수형식대특저삼암심시험곡선진행의합분석,재차기출상,운용미분선성묘술방법,건립고필변계층급계동압력제도영향적특저삼저층삼류조력제도적수학모형,득도삼류조력제도여구체압력제도급삼투솔적관계도판.결과표명,삼류조력제도수구체압력제도증가이강저,수삼투솔감소이증대,차삼투솔월소,삼류조력제도증폭월대,기비선성변화특정월명현.
According to the boundary layer theory, the experimental curves of ultr-low permeability cores were analyzed by applying cubic function. Considering the influence of the boundary layer and starting pressure gradient, a mathematical model of flow resistance gradient of ultra-low permeability reservoir was established by differential and linear description method. And the relationship charts between flow resistance gradient and driving pressure gradient, permeability were obtained. The results show that the flow resistance gradient decreases with the driving pressure gradient increasing. The flow resistance gradient increases with the permeability decreasing, and the increasing amplitude of flow resistance gradient enhances and its nonlinear feature is more obvious with the permeability decreasing.