【摘要】 针对大庆长垣高含水后期剩余油精细描述对油藏模拟的技术需求,建立了主从方式并行架构、雅可比矩阵区域分解算法、线性系统两步预处理解法,形成了超大规模分布式并行油藏模拟技术;针对大庆外围特低渗油藏的模拟问题,建立了统一的非线性渗流模型和考虑拟启动压力梯度的井—网格方程,开发了适合裂缝、压敏和非达西的油藏模拟技术;针对大庆油田长期、大量实施分层注水措施的开发特点,建立了考虑嘴损机理的井底流动分段控制方程,形成了分层注水工艺的准确模拟技术;针对特高含水期低效、无效循环识别问题,建立了描述每口注水井注入水的浓度方程及其并行求解方法,开发了无井数限制的注水跟踪模拟技术。这些被广泛应用的特色技术,持续支撑了大庆已开发油田精细油藏描述工作的全面覆盖和质量提升,对水驱剩余油高效挖潜起到了良好作用。更多还原

【Abstract】 In the light of the technical demands of the reservoir simulation for the remained-oil fine characterization in the later period of high-watercut Daqing Placanticline, the parallel architecture of master-slave mode, Jacobi matrix region decomposition algorithm and the two-step preprocessing solution method of the linear system were established,and the simulating technique of super-large-scale distributed parallel computation for the reservoirs was formed; aiming at the simulating problem of the extra-low-permeability oil reservoirs in peripheral Daqing, the uniform nonlinear seepage model and the well-grid equation considering the start-up pressure gradient were established, and the reservoir simulating technique suitable for the fractures, pressure sensitivity and non-Darcy flow was developed;in the light of the development features of long-period and a large amount of stratified water injection of Daqing Oilfield, the subsection control equation of the bottom hole flow considering the nozzle loss mechanism was established, and finally the accurate simulating technique of the stratified water injection technology was developed; aiming at the identifying problems of non and low efficiency cycles in the period of extra-high water cut, the concentration equation describing the injected water for each injecting well and its parallel solution method were established, the injected water tracking and simulating techniques were developed without the limit of the well number. These extensively-applied characteristic techniques have continuously supported the comprehensive coverage and quality improvement of the fine reservoir description in Daqing developed oilfields, and furthermore played much better role for the high-efficiency potential tapping of the waterflooded remained oil.更多还原