体积压裂水平井蒸汽吞吐过程砂粒运移

在以水平井体积压裂为主的稠油油藏开采过程中,随着油田进入开发中后期,油井出砂日趋严重,油井出砂会严重影响油田的正常生产。因此,对水平井体积压裂蒸汽吞吐过程中的砂砾运移规律进行了深入研究,为应对油井出砂问题提供相关理论支持。利用CFD仿真模拟方法,研究了体积压裂水平井蒸汽吞吐过程中,研究了裂缝压力、入口流量、井斜角以及裂缝数量对水平井内砂床形成的影响以及变化规律。由模拟结果可知：固相体积分数随着裂缝压力的上升呈现出先下降后上升的趋势且在裂缝压力为8MPa的时候井筒出砂量最小；固相体积分数随着入口流量的提升而下降；相同情况下井斜角越小固相体积分数越大；固相体积分数随着裂缝条数的增多而降低。

Study onSand MigrationDuring Steam Stimulation in Horizontal Wells with SRV Fracturing

In the production process of heavy oil reservoirs dominated by horizontal well Stimulated Reservoir Volume (SRV) fracturing, as the oil field enters the middle and late stage of development, the sand production of oil Wells becomes increasingly serious, which will seriously affect the normal production of oil fields. Therefore, the sand and gravel transport rules during the steam stimulation of SRV fracturing in horizontal Wells have been studied in depth, which provides theoretical support for dealing with the problem of sand production in oil Wells. CFD simulation was used to study the influence of fracture pressure, inlet flow, inclination Angle and number of fractures on the formation of sand bed in horizontal Wells during steam stimulation of SRV fracturing. According to the simulation results, as the fracture pressure increases, the solid phase volume fraction first decreases and then increases, and the wellbore sand production is the minimum when the fracture pressure is 8MPa. The volume fraction of solid phase decreases with the increase of inlet flow. Under the same conditions, the smaller the well inclination Angle, the larger the solid phase volume fraction. The solid phase volume fraction decreases with the increase of the number of fracture lines.