水平井自适应调流控水装置研制与应用

Development and Application of an Autonomous Inflow Control Device in Horizontal Wells

针对边底水油藏水平井由于跟端趾端效应和水平段地层非均质性造成含水率快速升高的情况,在分析油水物性和调流控水筛管应用工艺的基础上,利用层流与紊流的流动特性,研制了一种能够根据产出流体的情况自动调节附加阻力的"主动式"自适应调流控水装置。流体动力学流场模拟及室内性能试验结果表明,油水流经自适应调流控水装置时,油相的摩阻低、水相的摩阻高,最大水油压降比可达10.0以上,具有自动调节油水附加阻力的功能。自适应调流控水装置在塔河油田底水油藏水平井A井进行了现场试验,与未应用调流控水装置的邻井相比,低含水采油期延长3个月以上。研究与试验表明,自适应调流控水装置可以根据产出流体的情况,自动对产出水进行节流,解决了边底水油藏水平井底水锥进的问题。

For horizontal wells in oil reservoirs with edge water or bottom water, the heel and toe effect and the heterogeneity of horizontal section can lead to a rapid increase of water content. Through the analysis of oil/water properties and flow adjustment and water control screen pipe techniques, and a con- sideration of the features of laminar flow and turbulent flow, an ＂active＂ autonomous inflow control device （AICD） was developed which could automatically adjust additional resistance depending on fluids produced. The hydrodynamics flow field simulation and lab test showed low friction of oil and high friction of water when oil and water flow through the AICD, with the maximum water-oil pressure drop ratio up to 20 or more. Thus, the additional resistance of oil and water was adjusted automatically. A field test of AICD was conducted in Well A, while a horizontal well in oil reservoir with bottom water, Tahe Oilfield. Compared with adjacent wells with no AICD applied, the oil production period of Well A with low water content was postponed for 3 months or longer. The study and test revealed that the AICD could throttle the water produced automatically depending on the fluids produced, so as to avoid bottom water coning in oil reservoirs with edge water or bottom water.