CAJ | 학술논문

基于油藏数值模拟定义了"聚合物驱受效剩余油饱和度"新概念,研究了聚合物驱作用下宏观剩余油受效机制及受效剩余油在油藏中的分布部位和形态,讨论了储层韵律性、原油黏度和注聚用量对受效剩余油分布的影响.研究结果表明,受效剩余油在油层内纵向上主要分布于注入水窜流区的上部,呈斜纺锤体形状,平面上受效区域则位于注采井间,呈环状分布.不同韵律储层剩余油受效机制及受效剩余油分布有所不同.随着原油黏度的增加,受效剩余油主体区向油层底部移动,且受效剩余油饱和度峰值降低.随着注聚用量的增多,受效剩余油范围沿斜纺锤体的轴线向两侧扩大.
기우유장수치모의정의료"취합물구수효잉여유포화도"신개념,연구료취합물구작용하굉관잉여유수효궤제급수효잉여유재유장중적분포부위화형태,토론료저층운률성、원유점도화주취용량대수효잉여유분포적영향.연구결과표명,수효잉여유재유층내종향상주요분포우주입수찬류구적상부,정사방추체형상,평면상수효구역칙위우주채정간,정배상분포.불동운률저층잉여유수효궤제급수효잉여유분포유소불동.수착원유점도적증가,수효잉여유주체구향유층저부이동,차수효잉여유포화도봉치강저.수착주취용량적증다,수효잉여유범위연사방추체적축선향량측확대.
A new concept of response remaining oil saturation in polymer flooding was defined on the basis of reservoir numerical simulation. The macroscopic response mechanism of remaining oil was discussed. The places and shapes of response remaining oil in reservoirs with polymer flooding were investigated. The influences of reservoir rhythm, oil viscosity and the amount of polymer injection on the distribution of response remaining oil were analyzed. The research results showed that the response remaining oil vertically distributed in the upper parts of the cross-flow zones and took on the shape of spindle. The response zones were horizontally located between the injected wells and producing wells and took on the circular shape. The response mechanism and distribution of remaining oil were various in the different rhythm formations. The body of response remaining oil moved to the lower parts of formation, and the peak values of response remaining oil saturation declined with the increase of oil viscosity. As the injection amount of polymer increased, the boundary of response remaining oil extended bilaterally along the axis of spindle.