孤东油田馆陶组水驱特征与调整挖潜对策研究

通过建立"均质系数"概念,对孤东油田开发单元进行分类,综合利用相渗模型法、经验公式法等方法,计算了不同水驱开发单元驱油效率、体积波及系数和采收率.提出了不同类型开发单元下步提高采收率的方向,Ⅰ类单元主要是提高纵向波及程度,Ⅱ类单元主要是提高驱油效率和体积波及系数,Ⅲ类单元要进一步提高储量动用程度.分析表明,目前孤东油田的三类开发单元均有一定调整潜力.

Water-flooding characteristics and potential tapping measures of Guantao Formation in Gudong Oilfield

After high-speed and high-efficiency development of 20 years,the general water-cut of Gudong Oilfield is 94.9%,and its recovery degree reaches to 26.35%.A problem to face is how to enhance oil-displacement efficiency and recovery factor.A concept of "homogeneity coefficient" is established,and the development units of the oilfield are classified into three types by means of the homogeneity coefficient.The oil-displacement efficiency,volumetric sweep factor and recovery factor of the every development units are calculated by several methods.Based on the calculation results,the measures of various types of development units for further enhancing recovery factor are proposed:enhancing longitudinal sweep degree to the development units of Ⅰtype;enhancing oil-displacement efficiency and volumetric sweep factor to the development units of typeⅡ;enhancing recovery factor are proposed:enhancing reserves producing degree to the development units of type Ⅲ.At present,the three types of development units all have certain potential.