多方法定量评价低渗储层贾敏效应影响因素——以塔里木油田轮古7井区为例

Quantitative evaluation of Jamin effect in low-permeability reservoirs using multiple methods:taking Lungu-7 wellblock in Tarim Oilfield as an example

定量评价各类因素对贾敏效应的影响程度,对改善低渗透油藏的水驱开发效果具有重要意义.以塔里木油田轮古7井区为例,结合本区地质特征,选择渗透率、液相侵入深度、驱替压力、孔喉比、孔隙度、截面积等作为影响贾敏效应的因素,通过灰色关联分析法与相对比较法对上述影响因素进行定量分析,确定其影响权重.研究表明,两种方法的研究结果一致,即孔喉比和孔隙度是贾敏效应的主要影响因素,并通过岩心流动实验验证了上述研究结果的可靠性.

There is generally Jamin effect in water injection development of low permeability reservoirs.The quantitative evaluation of the various factors of influencing Jamin effect is of important significance to enhancing the water flooding development effect of low-permeability reservoirs.Taking Lungu-7 wellblock in Tarim Oilfield as an example,reservoir permeability,liquid invasion depth,displacement pressure,pore-to-throat ratio,porosity,sectional area are selected as the main factors of influencing Jiamin effect according to the geological features in this area,and their effects on Jiamin effect are quantitatively evaluated through gray correlation method and relative comparison method.The results show that the evaluation results of these two methods are consistent.That is,pore-to-throat ratio and porosity are the main factors of influencing Jamin effect,which are also verified by core flow experiments.