海上稠油砂岩油藏采出程度敏感性分析与评价——以秦皇岛32-6油田为例

以秦皇岛32-6油田为研究对象,结合海上稠油砂岩油藏的实际情况,综合考虑了地质因素和开发因素对采出程度的影响。利用单因素分析方法,建立了秦皇岛32-6油田采出程度随井距、原油粘度、提液时机、油层厚度、采油速度和纵向渗透率非均质性变化的数值模型。通过对比不同模型的模拟结果可知,不同条件下采出程度的主控因素不同。其中,井距对采出程度的影响最显著,其次是地层原油粘度和纵向渗透率非均质性,而提液时机、油层厚度和采油速度的影响较小。此外,对各影响因素进行了无因次化,通过多元线性回归,得到了不同地质、流体物性、开发等因素表征采出程度的关系式,更直观地表现了不同因素变化对采出程度的影响程度。

Analysis and evaluation on recovery ratio sensibility of the offshore sandstone of heavy oil reservoir-case of QHD32-6 oilfield

This paper takes research on the influence on recovery ratio of geologic and development factors according to the state of QHD32-6 oilfield,and establishes a numerical model about the recovery ratio in this development block affected by viscosity of crude oil,layer thickness,heterogeneity about vertical permeability character,well spacing,oil production rate,time of liquid enhancement,and then conducts theoretical study on numerical reservoir simulation.Conclusions show that the main factors affecting the recovery ratio are different from results in all of the field.The most considerable factor is the well space,then the viscosity of crude oil and the heterogeneity of vertical permeability;while the time of liquid enhancement,layer thickness and oil production rate affect little.Moreover,the mode about geologic factor,fluid feature,development approach and the recovery ratio is obtained by multi-linear regression after getting dimensionless different factors.