非均质油藏双水平井SAGD三维物理模拟

为了改善双水平井SAGD开发过程受储层非均质性影响的问题，利用自主研发的双水平井双管柱结构三维比例物理模型和已有的注蒸汽三维模拟实验系统，研究了油藏非均质性对SAGD蒸汽腔展布的影响规律。研究结果表明：当储层存在平面非均质性时，双水平井SAGD在开发过程中存在蒸汽腔发育不均匀、水平段油藏动用程度较差等现象，影响了SAGD的开采效果；水平井采用双管柱结构可提高水平段油藏动用程度；合理的注采参数、有效的操作压力、较高的蒸汽干度以及稳定的生产井井底饱和温度与实际温度的差值控制均可有效改善开发效果。根据物理模拟实验的结果总结了双水平井SAGD生产各阶段的注采调控方法，将其应用于油田现场取得了较好的开发效果。

3D physical simulation on dual horizontal well SAGD in heterogeneous reservoir

The development process of dual horizontal well steam assisted gravity drainage (SAGD) is affected obviously by reservoir heterogeneity. The experiment of this paper is designed taking advantage of 3D physical simulation experimental system of SAGD available and independent research and development 3D heterogeneous physical model, along with dual horizontal well configuration of both injection and production. Influence of heterogeneity in the reservoir on expansion of SAGD steam chamber is summarized in this paper. The results show that the areal heterogeneity of reservoir causes fluctuation of SAGD steam chamber and poor development along horizontal section of the reservoir as a result of unsatisfactory effect on SAGD performance. The design of dual-well configuration contributes to the development along horizontal section of the reservoir. Reasonable optimizations of parameters in injector and producer,effective operating pressure, higher steam quality as well as stable Sub-cool control can effectively improve the uniform of steam chamber and development of SAGD performance. Summery of steam distribution in any injection and production period of dual horizontal well SAGD is done through the physical experiment. Satisfactory application is achieved in the field test.