稠油油藏自适应调流控水装置优化与试验

Optimization and Experimental Study on Autonomous Inflow Control Device in Heavy Oil Reservoirs

在油气藏开发中底水易于向水平井根部和物性较好部位锥进,极大地影响了水平井的开采效果。为此,优化出一种稠油油藏自适应调流控水装置。通过运用两相流方法,建立了自适应稠油调流控水结构内部流动仿真计算模型,进行了仿真结果分析及对稠油的适应性试验。研究结果表明:在挡板为2层、入口支路为4个、入口角度为40°时,水油压降比接近5,节流控水效果最好;该装置对稠油和稀油都有很好的节流控水效果,对稠油有更好的适应性;试验结果表明该装置对稠油产生的水油压降比在4.52左右,且随着流量增大,水相节流压降急剧增大,而油相节流压降增幅较小,该装置对稠油有较好的适应性。所得结论可以为稠油开采控水设备结构设计提供理论参考。

Bottom water tends to taper into the root of horizontal wells and the parts with good physical properties in the development of oil and gas reservoirs,which greatly affects the production effect of horizontal wells.Therefore,the autonomous inflow control device for heavy oil reservoir was optimized.By using the two-phase flow method,the simulation calculation model for the internal flow of the autonomous inflow control device was established,and the simulation results were analyzed and the heavy oil adaptability test was carried out.The results show that when the baffle has two layers,inlet branches are four and the inlet angle is 40°,the water-oil pressure drop ratio is close to 5,with the best throttling water control effect.The device has good throttling and water control effects for both heavy oil and thin oil,with better adaptability to heavy oil.The test shows that the water-oil pressure drop ratio of the device for heavy oil is about 4.52;and with the increase of flow rate,the throttling pressure drop of water phase increases sharply,while the throttling pressure drop of oil phase increases slightly,so the device has good adaptability to heavy oil.The conclusion provides theoretical references for structural design of water control equipment in heavy oil recovery.