LIFT-GAS OPTIMIZATION WITH CHOKE CONTROL
    12.
    发明申请
    LIFT-GAS OPTIMIZATION WITH CHOKE CONTROL 有权
    LIKE-GAS优化与控制

    公开(公告)号:US20120095603A1

    公开(公告)日:2012-04-19

    申请号:US13253680

    申请日:2011-10-05

    Abstract: A method of optimizing production of wells using choke control includes generating, for each well, an intermediate solution to optimize the production of each well. The generating includes using an offline model that includes a mixed-integer nonlinear program solver and includes using production curves based on a choke state and a given wellhead pressure. The method further includes calculating, using a network model and the intermediate solution of each well, a current online wellhead pressure for each well. The method further includes setting the intermediate solution as a final solution based on determining that a difference between the current online wellhead pressure of each well and a prior online wellhead pressure of each well is less than a tolerance amount. The method further includes adjusting, using the final solution of each well, at least one operating parameter of the wells.

    Abstract translation: 使用扼流器控制来优化井的生产的方法包括为每个井生成中间溶液以优化每个井的产量。 该生成包括使用包括混合整数非线性程序求解器的离线模型,并且包括使用基于阻塞状态和给定井口压力的生产曲线。 该方法还包括使用每个井的网络模型和中间解决方案来计算每个井的当前在线井口压力。 该方法还包括基于确定每个井的当前在线井口压力和每个井的先前在线井口压力之间的差小于公差量,将中间解决方案设置为最终解决方案。 该方法还包括使用每个井的最终解决方案来调节井的至少一个操作参数。

    Statistical method for analyzing the performance of oilfield equipment
    13.
    发明授权
    Statistical method for analyzing the performance of oilfield equipment 有权
    统计分析油田设备性能的方法

    公开(公告)号:US07801707B2

    公开(公告)日:2010-09-21

    申请号:US11461911

    申请日:2006-08-02

    Abstract: A statistical methodology is disclosed to provide time-to-event estimates for oilfield equipment. A method according to the present invention extracts unbiased information from equipment performance data and considers parameters interactions without recourse to data thinning. The analysis explicitly accounts for items of equipment that are still operational at the time of analysis. A method according to the present invention may also be utilized to apply survival analysis to any oilfield equipment components where time-to-event information has been recorded. The method of the present invention allows comparative reckoning between different components present in the system comprising several or many individual components and allows analysis of these components either individually or simultaneously, i.e., in the presence of other components.

    Abstract translation: 披露了一种统计方法来提供油田设备的事件估计。 根据本发明的方法从设备性能数据中提取无偏差的信息,并考虑参数交互而不需要数据稀疏。 分析明确地说明了在分析时仍然运行的设备项目。 根据本发明的方法还可用于将生存分析应用于已记录时间 - 事件信息的任何油田设备部件。 本发明的方法允许在包含多个或多个单独组分的系统中存在的不同组分之间进行比较推算,并允许分别或同时分析这些组分,即在其它组分存在下进行分析。

    System, method, and apparatus for fracture design optimization
    14.
    发明申请
    System, method, and apparatus for fracture design optimization 有权
    断裂设计优化的系统,方法和装置

    公开(公告)号:US20080209997A1

    公开(公告)日:2008-09-04

    申请号:US12026589

    申请日:2008-02-06

    CPC classification number: E21B43/26

    Abstract: A method for optimizing fracture treatments includes interpreting a nominal pump schedule corresponding to a nominal value for each fracture control parameter. The method further includes interpreting environmental variables, and interpreting probability distributions for each of the environmental variables that is uncertain. The method further includes defining an objective function such as a net present value of each fracture treatment over a 365 day period following the fracture treatment. The method includes determining an optimal value for each fracture control parameter according to the objective function by determining the fracture control parameter values that yield the best mean net present value given the variability in the environmental variables as described by their probability distributions.

    Abstract translation: 用于优化断裂处理的方法包括解释对应于每个断裂控制参数的标称值的标称泵排程。 该方法还包括解释环境变量,以及解释不确定的每个环境变量的概率分布。 该方法还包括在断裂处理后的365天周期中定义目标函数,例如每个断裂处理的净现值。 该方法包括根据目标函数确定每个裂缝控制参数的最佳值,通过确定给出环境变量的可变性(由其概率分布描述)产生最佳平均净现值的断裂控制参数值。

    SYSTEM AND METHOD FOR PERFORMING OILFIELD SIMULATION OPERATIONS
    15.
    发明申请
    SYSTEM AND METHOD FOR PERFORMING OILFIELD SIMULATION OPERATIONS 有权
    用于执行油田模拟操作的系统和方法

    公开(公告)号:US20080133194A1

    公开(公告)日:2008-06-05

    申请号:US11929921

    申请日:2007-10-30

    CPC classification number: E21B47/00 E21B49/00

    Abstract: The invention relates to a method for performing operations of an oilfield having at least one process facilities and at least one wellsite operatively connected thereto, each at least one wellsite having a wellbore penetrating a subterranean formation for extracting fluid from or injecting fluid to an underground reservoir therein. The method involves selectively coupling a plurality of oilfield simulators according to a predefined configuration, each oilfield simulator modeling at least a portion of the oilfield, a first oilfield simulator of the plurality of oilfield simulators receives an oilfield control parameter as an input, identifying an uncertainty parameter associated with a plurality of probable values each corresponding to a weighted probability, a second oilfield simulator of the plurality of oilfield simulators receives the uncertainty parameter as an input, modeling the operations of the oilfield to generate an estimated performance by selectively communicating between the plurality of oilfield simulators, the operations of the oilfield is modeled with a predetermined value of the oilfield control parameter and at least one of the plurality of probable values of the uncertainty parameter; and identifying an optimal value of the oilfield control parameter based on the estimated performance.

    Abstract translation: 本发明涉及一种执行油田操作的方法,该油田具有至少一个处理设施和至少一个与其可操作连接的井场,每个至少一个井场具有渗透地下地层的井筒,用于从地下储层 其中。 该方法包括根据预定义的配置选择性地联接多个油田模拟器,每个油田模拟器建模油田的至少一部分,多个油田模拟器的第一油田模拟器接收油田控制参数作为输入,识别不确定性 参数与多个可能值相关联,每个可能值分别对应于加权概率,所述多个油田模拟器的第二油田模拟器接收不确定性参数作为输入,通过在多个油田模拟器之间选择性地通信来对油田的运行进行建模以产生估计性能 油田模拟器的油田操作用油田控制参数的预定值和不确定性参数的多个可能值中的至少一个来建模; 以及基于所估计的性能来确定所述油田控制参数的最优值。

    Statistical Method for Analyzing the Performance of Oilfield Equipment
    16.
    发明申请
    Statistical Method for Analyzing the Performance of Oilfield Equipment 有权
    油田设备性能统计分析方法

    公开(公告)号:US20080126049A1

    公开(公告)日:2008-05-29

    申请号:US11461911

    申请日:2006-08-02

    Abstract: A statistical methodology is disclosed to provide time-to-event estimates for oilfield equipment performance data and considers parameters interactions without recourse to data thinning. The analysis explicitly accounts for items of equipment that are still operational at the time of analysis. A method according to the present invention may also be utilized to apply survival analysis to any oilfield equipment components where time-to-event information has been recorded. The method of the present invention allows comparative reckoning between different components present in the system comprising several or many individual components and allows analysis of these components either individually or simultaneously, i.e., in the presence of other components.

    Abstract translation: 披露了一种统计方法来提供油田设备性能数据的时间 - 事件估计,并考虑参数相互作用而不求助于数据稀疏化。 分析明确地说明了在分析时仍然运行的设备项目。 根据本发明的方法还可用于将生存分析应用于已记录时间 - 事件信息的任何油田设备部件。 本发明的方法允许在包含多个或多个单独组分的系统中存在的不同组分之间进行比较推算,并允许分别或同时分析这些组分,即在其它组分存在下进行分析。

    Method for optimal gridding in reservoir simulation
    17.
    发明申请
    Method for optimal gridding in reservoir simulation 有权
    油藏模拟中优化网格化的方法

    公开(公告)号:US20070265815A1

    公开(公告)日:2007-11-15

    申请号:US11656840

    申请日:2007-01-23

    CPC classification number: G01V11/00

    Abstract: A method is disclosed for performing optimal gridding in reservoir simulation, the method comprising: establishing an optimal coarse grid proxy that can replace all or parts of a fine grid with a coarse grid while preserving an accuracy of a predefined simulation model output, the step of establishing an optimal coarse grid proxy including finding, by using an optimizer, a best fit of a coarse grid output to the output of a training set.

    Abstract translation: 公开了一种用于在储层模拟中执行最佳网格化的方法,所述方法包括:建立最优粗网格代理,其可以用粗栅格替代精细网格的全部或部分,同时保持预定模拟模型输出的精度,步骤 建立最优粗网格代理,包括通过使用优化器找到粗网格输出到训练集的输出的最佳拟合。

    Production optimization for oilfields using a mixed-integer nonlinear programming model
    20.
    发明授权
    Production optimization for oilfields using a mixed-integer nonlinear programming model 失效
    使用混合整数非线性规划模型对油田进行生产优化

    公开(公告)号:US08600717B2

    公开(公告)日:2013-12-03

    申请号:US12774247

    申请日:2010-05-05

    CPC classification number: E21B43/12

    Abstract: A system performs production optimization for oilfields using a mixed-integer nonlinear programming (MINLP) model. The system uses an offline-online approach to model a network of interdependent wells in an online network simulator while modeling multiple interdependent variables that control performance as an offline MINLP problem. The offline model is based on production profiles established by assuming decoupled wells in the actual network of wells. In one example, an amount of lift-gas to inject and settings for subsurface chokes are optimized. An offline solver optimizes variables through the MINLP model. Offline results are used to prime the online network simulator. Iteration between the offline and online models results in a convergence, at which point values for the interdependent variables are communicated to the real-world oilfield to optimize hydrocarbon production.

    Abstract translation: 系统使用混合整数非线性规划(MINLP)模型对油田进行生产优化。 该系统使用离线在线方法来模拟在线网络模拟器中相互依赖的网络的网络,同时对多个相互依赖的变量建模,以将性能控制为离线MINLP问题。 离线模型基于通过在实际的井网中假设分离井建立的生产简档。 在一个示例中,优化了要注入的提升气体量和地下扼流圈的设置。 离线求解器通过MINLP模型优化变量。 离线结果用于填补在线网络模拟器。 离线和在线模型之间的迭代导致收敛,在这一点上,相互依赖的变量的值被传达到现实油田,以优化碳氢化合物生产。

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