A new technology of 3D scaled physical simulation for high-pressure and high-temperature steam injection recovery

Abstract

In order to solve the problems of existing physical simulation experiment device for thermal recovery, such as great heat loss, low precision in internal pressure control of physical model and insufficient process monitoring, a new experiment device for high-pressure and high-temperature (HPHT) 3D scaled physical simulation is developed independently, and the relevant experiment technical route is presented. By using thermal fluid simulation, PID auto-control and 3D graphics, the following problems are solved: (1) the heat loss scaled simulation technology is applied for HPHT thermal recovery model, to control the heat dissipating capacity of the model top and bottom and realize the continuous growth of the steam chamber; (2) HPHT 3D formation temperature/pressure simulation technology is applied to keep the model pressure and temperature stable, ensuring temperature difference at each point in high-pressure chamber less than ± 2 °C; (3) 3D data field on-line monitoring and visual analysis technology is applied to monitor and control the reservoir performance at real time. By using this experiment device, 3D scaled physical simulation experiment is performed for commingled thermal recovery of extremely heavy oil by horizontal/vertical wells as well as SAGD of super heavy oil by dual horizontal wells. The evolution of steam chamber is depicted and the knowledge on SAGD mechanism by dual horizontal wells and the production performance is deeply studied. 摘要: 为了解决现有热采物理模拟装置模型热损失大、模型内压控制精度低、实验过程监控不足等问题 自主研制成功了新型高温高压三维比例物理模拟实验装置并提出了注蒸汽采油高温高压三维比例物理模拟实验技术路线。该装置采用热流数值模拟、PID自动控制及三维数据场平面设计方法 重点解决了以下难题并形成特色技术°采用高温高压热采模型热损失比例模化技术 比例控制模型顶底散热量 实现汽腔持续发育 °采用高温高压三维地层温/压模拟技术 实现模型压力均匀稳定控制 高压舱内各点温差小于±2 ࠓ °采用模型三维数据场在线监测与可视化分析技术 实时监测与调控油藏动态。利用该实验装置开展了特稠油水平井与直井组合热采及超稠油双水平井SAGD 蒸汽辅助重力泄油三维比例物理模拟实验研究 完整刻画了汽腔发育规律 深化了对双水平井SAGD开采机理和生产动态规律的认识。图5参13 关键词注蒸汽采油 比例物理模拟 三维模型 高温高压 蒸汽辅助重力泄油-图分类号TE345 文献标识码A Key words: steam injection recovery, scaled physical simulation, 3D physical model, high-pressure and high-temperature, steam assisted gravity drainage (SAGD)