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公开(公告)号：US10301918B2
公开(公告)日：2019-05-28
申请号：US15148512
申请日：2016-05-06
发明人： Xiaowei Weng , Eduard Siebrits
IPC分类号： E21B43/26 , G06G7/57 , G06G7/50 , E21B43/267
摘要： A hydraulic fracture design model that simulates the complex physical process of fracture propagation in the earth driven by the injected fluid through a wellbore. An objective in the model is to adhere with the laws of physics governing the surface deformation of the created fracture subjected to the fluid pressure, the fluid flow in the gap formed by the opposing fracture surfaces, the propagation of the fracture front, the transport of the proppant in the fracture carried by the fluid, and the leakoff of the fracturing fluid into the permeable rock. The models used in accordance with methods of the invention are typically based on the assumptions and the mathematical equations for the conventional 2D or P3D models, and further take into account the network of jointed fracture segments. For each fracture segment, the mathematical equations governing the fracture deformation and fluid flow apply. For each time step, the model predicts the incremental growth of the branch tips and the pressure and flow rate distribution in the system by solving the governing equations and satisfying the boundary conditions at the fracture tips, wellbore and connected branch joints. An iterative technique is used to obtain the solution of this highly nonlinear and complex problem.
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公开(公告)号：US20170204726A1
公开(公告)日：2017-07-20
申请号：US15475858
申请日：2017-03-31
CPC分类号： E21B49/00 , E21B47/0002 , G01V1/40 , H04B7/18508 , H04B7/18521 , H04B10/5561 , H04B10/677 , H04L27/2075 , H04L27/2096 , H04L27/223 , H04L27/2601 , Y02D70/446 , Y02D70/46
摘要： In one possible implementation an in-situ property determination system includes a displacement tool configured for use in a wellbore. The displacement tool includes four or more pads symmetrically located about an axis of the displacement tool, with each pad having a contact surface configured to contact a wall of the wellbore. The four or more pads can extend from a first position proximate an outer surface of the displacement tool to a second position in contact with the wall of the wellbore such that the four or more pads deform the wellbore into an at least approximately circular cross section. The system also includes a recordation device to record force displacement information associated with extending the four or more pads from the first position to the second position.
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公开(公告)号：US20160251948A1
公开(公告)日：2016-09-01
申请号：US15148512
申请日：2016-05-06
发明人： Xiaowei Weng , Eduard Siebrits
IPC分类号： E21B43/26 , G06G7/50 , G06G7/57 , E21B43/267
CPC分类号： E21B43/26 , E21B43/267 , G06G7/50 , G06G7/57
摘要： A hydraulic fracture design model that simulates the complex physical process of fracture propagation in the earth driven by the injected fluid through a wellbore. An objective in the model is to adhere with the laws of physics governing the surface deformation of the created fracture subjected to the fluid pressure, the fluid flow in the gap formed by the opposing fracture surfaces, the propagation of the fracture front, the transport of the proppant in the fracture carried by the fluid, and the leakoff of the fracturing fluid into the permeable rock. The models used in accordance with methods of the invention are typically based on the assumptions and the mathematical equations for the conventional 2D or P3D models, and further take into account the network of jointed fracture segments. For each fracture segment, the mathematical equations governing the fracture deformation and fluid flow apply. For each time step, the model predicts the incremental growth of the branch tips and the pressure and flow rate distribution in the system by solving the governing equations and satisfying the boundary conditions at the fracture tips, wellbore and connected branch joints. An iterative technique is used to obtain the solution of this highly nonlinear and complex problem.
摘要翻译： 一种水力压裂设计模型，模拟通过井筒注入的流体驱动的地球中裂缝扩展的复杂物理过程。 该模型的目标是遵循物理学规律，对受到流体压力的产生的裂缝的表面变形进行控制，由相对的断裂面形成的间隙中的流体流动，裂缝前端的传播， 在流体中承载的裂缝中的支撑剂，以及压裂液体渗透到可渗透岩石中的泄漏。 根据本发明的方法使用的模型通常基于常规2D或P3D模型的假设和数学方程，并且还考虑到连接断裂段的网络。 对于每个裂缝段，控制断裂变形和流体流动的数学方程适用。 对于每个时间步长，该模型通过求解控制方程并满足裂缝尖端，井筒和连接分支接头处的边界条件来预测分支尖端的增量增长和系统的压力和流量分布。 使用迭代技术来获得这种高度非线性和复杂问题的解决方案。
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公开(公告)号：US20180106708A1
公开(公告)日：2018-04-19
申请号：US15573540
申请日：2015-11-05
发明人： Eduard Siebrits , Sonia Marino , Roberto Suarez-Rivera , Joel Wesley Martin , Upul Samarasingha , Chaitanya Deenadayalu
IPC分类号： G01N3/46 , G01N23/046 , E21B43/267 , G06G7/50
CPC分类号： G01N3/46 , E21B43/267 , G01N23/046 , G01N33/24 , G01V2210/66 , G06G7/50 , G06G7/57
摘要： A workflow is provided that characterizes the hydraulic fracturability of a rock based on properties obtained from CT scanning and from non-CT based data. The characterization is based on obtaining a plurality of properties of a core sample as a function of axial location in the core sample. The workflow includes obtaining CT data from at least one CT scan of the core, obtaining heterogeneity data of the core, generating a heterogeneous rock analysis (HRA) model based at least on the obtained CT data and heterogeneity data; quantifying statistically significant distinct rock classes in the core, and assigning hydraulic fracturability index (HFI) values to each distinct rock class, as well as any HFI variation within each rock class. An HFI value is assigned to each rock class, and within a rock class, in the core and those values can be propagated to other locations in the same or surrounding wells.
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