油藏描述在浅层稠油开发中的应用

Application of reservoir description in shallow heavy oil development

准噶尔盆地西北缘浅层稠油油藏以辫状河流相为主,储层物性、流体性质变化剧烈,油藏开发效果差异大。在三维地震精细解释预测、单砂体细分与对比研究的基础上,采用精细油藏描述与数值模拟研究一体化的技术路线,精细描述了储层微幅构造、沉积微相、储层非均质性,完成了相控储层三维定量化研究;建立了反映不同开发阶段储层、流体变化情况的四维地质模型;掌握了油藏动用特征及剩余油分布规律,扩大了找油领域和滚动开发范围。对开发层系、井网、井距、开采方式等进行了优化研究,为开发调整方案部署提供了科学依据。

Shallow heavy oil reservoirs in the northwest edge of Junggar Basin mainly consist of braided river facies,where petrophysicl and fluid property change drastically,and reservoir development responses differ a lot.On basis of 3D seismic fine interpretation,prediction,and single sand division and correlation,by integrating fine reservoir description and numerical study,this paper finely describes reservoir structure,sedimentary micro-facies and reservoir heterogeneity,carries out 3D quantitative study on facies-controlled reservoirs,establishes 4D geological model reflecting reservoir and fluid changes in different stages,understands reservoir producing characteristics and residual oil distribution,enlarges exploration domain and progressive development range,optimizes layer series of development,well pattern,spacing and recovery method,and provides scientific basis for development adjustment.