因相颗粒与油珠侵入地层孔隙的数学模型及模拟研究

MATHEMATICAL MODEL AND SIMULATION STUDY FOR SOLID PARTICLES AND OIL DROPLETS TO INVADE FORMATIN PORES

油气井产出水的综合治理与利用是中、后期油气田在当前亟待解决的一个重要课题。把油气井产出水回注地层是避免环境污染，利用这一水资源的重要途径。在回注施工设计时，考虑到产出水中包含杂质对地层可能产生的损害是必要的。文章提出的数学模型，可用于油气井产出水回注时预测地层渗透率的变化。模型中对产出水中颗粒与油珠的浓度，以及注入时的流量变化与地层渗透率损害的关系进行了模拟。模拟结果对深入理解产出水回注地层时产生地层伤害的机理是有益的，也为综合治理后利用油气井产出水提供了科学依据。

The comprehensive treatment and utilization of the water produced in oil-gas wells is an important subject of developing oil-gas fields in middel-late periods. It is an important way reinjecting the water into formation to refrain from environment pollution and to utilize it. It is necessary conidering the impurity in the water to do damage to formation when making reinjection. A mathematical model of predicting permeability change when reinjecting the water is prooposed Out. The relations among the concentration of solid particles and oil droplets in the water, the change of reinjection flow rate and permeabitily damage are simulated by the model. The simulated result is available for understanding the formation damage mechanism Caused by reinjecting and provides a scientific basis for comprehensively treating the water.