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公开(公告)号：US11142681B2
公开(公告)日：2021-10-12
申请号：US16003840
申请日：2018-06-08
申请人： Jianlin Wang , Weidong Guo , Lu Dong , Chen Fang , Mathew D. Suitor
发明人： Jianlin Wang , Weidong Guo , Lu Dong , Chen Fang , Mathew D. Suitor
摘要： Methods to optimize solvent use in solvent-dominated processes for recovery of hydrocarbons. Methods include injecting a solvent composition into a reservoir at a pressure above a liquid/vapor phase change of the solvent composition; injecting a chaser into the reservoir at a pressure above the liquid/vapor phase change of the solvent composition; allowing the solvent composition to mix with hydrocarbons in the reservoir and at least partially dissolve into the hydrocarbons to produce a solvent/hydrocarbon mixture; reducing the pressure in the reservoir below the liquid/vapor phase change pressure of the solvent composition thereby flowing at least a fraction of the solvent/hydrocarbon mixture from the reservoir; and repeating these steps as required.
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公开(公告)号：US20190002755A1
公开(公告)日：2019-01-03
申请号：US16003840
申请日：2018-06-08
申请人： Jianlin Wang , Weidong Guo , Lu Dong , Chen Fang , Mathew D. Suitor
发明人： Jianlin Wang , Weidong Guo , Lu Dong , Chen Fang , Mathew D. Suitor
摘要： Methods to optimize solvent use in solvent-dominated processes for recovery of hydrocarbons are disclosed herein. In some embodiments, disclosed methods include injecting a solvent composition into a reservoir at a pressure above a liquid/vapor phase change of the solvent composition; injecting a chaser into the reservoir at a pressure above the liquid/vapor phase change of the solvent composition; allowing the solvent composition to mix with hydrocarbons in the reservoir and at least partially dissolve into the hydrocarbons to produce a solvent/hydrocarbon mixture; reducing the pressure in the reservoir below the liquid/vapor phase change pressure of the solvent composition thereby flowing at least a fraction of the solvent/hydrocarbon mixture from the reservoir; and repeating these steps as required.
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公开(公告)号：US09626466B2
公开(公告)日：2017-04-18
申请号：US13825758
申请日：2011-08-12
申请人： Yahan Yang , Linfeng Bi , Weidong Guo , Rossen Parashkevov , Xiaohui Wu
发明人： Yahan Yang , Linfeng Bi , Weidong Guo , Rossen Parashkevov , Xiaohui Wu
CPC分类号： G06F17/5018 , G01V99/005 , G06F2217/16
摘要： A variable discretization method for general multiphase flow simulation in a producing hydrocarbon reservoir. For subsurface regions for which a regular or Voronoi computational mesh is suitable, a finite difference/finite volume method (“FDM”) is used to discretize numerical solution of the differential equations governing fluid flow (101). For subsurface regions with more complex geometries, a finite element method (“FEM”) is used. The invention combines FDM and FEM in a single computational framework (102). Mathematical coupling at interfaces between different discretization regions is accomplished by decomposing individual phase velocity into an averaged component and a correction term. The averaged velocity component may be determined from pressure and averaged capillary pressure and other properties based on the discretization method employed, while the velocity correction term may be computed using a multipoint flux approximation type method, which may be reduced to two-point flux approximation for simple grid and permeability fields.
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4.发明申请Variable Discretization Method For Flow Simulation On Complex Geological Models 审中-公开用于复杂地质模型的流动模拟的可变离散化方法公开(公告)号：US20130231907A1
公开(公告)日：2013-09-05
申请号：US13825758
申请日：2011-08-12
申请人： Yahan Yang , Linfeng Bi , Weidong Guo , Rossen Parashkevov , Xiaohui Wu
发明人： Yahan Yang , Linfeng Bi , Weidong Guo , Rossen Parashkevov , Xiaohui Wu
IPC分类号： G06F17/50
CPC分类号： G06F17/5018 , G01V99/005 , G06F2217/16
摘要： A variable discretization method for general multiphase flow simulation in a producing hydrocarbon reservoir. For subsurface regions for which a regular or Voronoi computational mesh is suitable, a finite difference/finite volume method (“FDM”) is used to discretize numerical solution of the differential equations governing fluid flow (101). For subsurface regions with more complex geometries, a finite element method (“FEM”) is used. The invention combines FDM and FEM in a single computational framework (102). Mathematical coupling at interfaces between different discretization regions is accomplished by decomposing individual phase velocity into an averaged component and a correction term. The averaged velocity component may be determined from pressure and averaged capillary pressure and other properties based on the discretization method employed, while the velocity correction term may be computed using a multipoint flux approximation type method, which may be reduced to two-point flux approximation for simple grid and permeability fields.
摘要翻译： 一种用于生产油气藏的一般多相流模拟的可变离散化方法。 对于常规或Voronoi计算网格适合的地下区域，使用有限差分/有限体积法（“FDM”）来离散控制流体流动的微分方程（101）的数值解。 对于具有更复杂几何的地下区域，使用有限元法（“FEM”）。 本发明将FDM和FEM组合在一个单一的计算框架中（102）。 通过将各个相速度分解成平均分量和校正项来实现不同离散区域之间的界面处的数学耦合。 平均速度分量可以基于所采用的离散化方法从压力和平均毛细管压力和其他性质确定，而速度校正项可以使用多点通量近似方法来计算，该方法可以减少到两点通量近似 简单网格和渗透性领域。
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公开(公告)号：US07009547B2
公开(公告)日：2006-03-07
申请号：US10322341
申请日：2002-12-17
申请人： Weidong Guo , Robert J. Huber , Kent F. Smith
发明人： Weidong Guo , Robert J. Huber , Kent F. Smith
IPC分类号： H03M1/12
CPC分类号： H03M1/141 , H03K17/04106
摘要： A current steering folding circuit is provided. The current steering folding circuit includes a load and at least one current source for drawing a current from the load. The current steering folding circuit also includes a first output signal terminal for providing a first output signal, and a second output signal terminal for providing a second output signal. A current steering section is also provided. The current steering section steers the current between the first output signal terminal and the second output signal terminal based on an input signal. The first output signal is substantially equal to the second output signal for N values of the input signal. Advantageously, the number of current sources does not exceed N.
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