平面非均质油藏均衡水驱调整方法研究

Balance Water flooding Adjustment of Plane Heterogeneous Reservoirs

针对平面非均质油藏注采不均衡的问题,运用数值模拟和油藏工程方法,提出了基于多参数定量计算的均衡水驱调整方法。研究表明,井距调整和驱替压差调整是实现平面非均质油藏均衡水驱的2种有效方式。根据储层平面非均质性、流体分布状况与注采井距、驱替压差之间的水驱平衡关系式,可定量调整不同方向注采井距和驱替压差的大小及比例。实际油藏应用表明,均衡水驱调整能够减小储层平面非均质性对水驱开发的影响,提高注水利用率,有效改善油藏开发效果。

Aiming at the imbalancebetween injection and production in plane heterogeneous reservoirs,numerical simulation and reservoir engineering were used to introduce a balance water flooding adjustment method which is based on multi- parameter quantitative calculation. Research indicates that well spacing and displacement pressure adjustments are the two effective means to achieve balance water flooding in plane heterogeneous reservoirs. The values and ratios of injection- production well spacing and displacement pressure under different directionscan be quantitatively adjusted according to the balance water flooding relationship between reservoir plane heterogeneity,fluid distribution,injection- production well spacing and displacement pressure. Field application presents that balance water flooding adjustment can reduce the effect of reservoir plane heterogeneity on waterflooding,increase injecting water utilization and improve water flooding performance.