Patents by Inventor Lennert David den Boer
Lennert David den Boer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10816686Abstract: A method can include receiving values of an inversion based at least in part on seismic amplitude variation with azimuth (AVAz) data for a region of a geologic environment; based at least in part on the received values, computing values that depend on components of a second-rank tensor aij; selecting a fracture height for fractures in the geologic environment; selecting an azimuth for a first fracture set of the fractures; based at least in part on the values for the second-rank tensor aij, the fracture height and the selected azimuth, determining an azimuth for a second fracture set of the fractures; and generating a discrete fracture network (DFN) for at least a portion of the region of the geologic environment where the discrete fracture network (DFN) includes fractures of the first fracture set and fractures of the second fracture set.Type: GrantFiled: July 20, 2016Date of Patent: October 27, 2020Assignee: Schlumberger Technology CorporationInventors: Lennert David den Boer, Colin M. Sayers
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Publication number: 20180203146Abstract: A method can include receiving values of an inversion based at least in part on seismic amplitude variation with azimuth (AVAz) data for a region of a geologic environment; based at least in part on the received values, computing values that depend on components of a second-rank tensor ?ij, selecting a fracture height for fractures in the geologic environment; selecting an azimuth for a first fracture set of the fractures; based at least in part on the values for the second-rank tensor ?ij; the fracture height and the selected azimuth, determining an azimuth for a second fracture set of the fractures; and generating a discrete fracture network (DFN) for at least a portion of the region of the geologic environment where the discrete fracture network (DFN) includes fractures of the first fracture set and fractures of the second fracture set.Type: ApplicationFiled: July 20, 2016Publication date: July 19, 2018Inventors: Lennert David den Boer, Colin M. Sayers
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Patent number: 8781806Abstract: A technique includes identifying a fracture polygon intersecting a voxel of a three-dimensional grid of voxels representing a region of interest of a hydrocarbon-bearing reservoir based on data indicative of a discrete fracture network. The technique includes partitioning the polygon with a regular mesh of points and determining a number of the mesh points inside the voxel and inside the polygon. The technique includes estimating an area of the fracture inside the voxel based at least in part on the determined number of mesh points inside the voxel and inside the polygon. The technique includes determining at least one property of a portion of the hydrocarbon-bearing reservoir, which coincides with the voxel based at least in part on the estimated area of the fracture.Type: GrantFiled: April 7, 2010Date of Patent: July 15, 2014Assignee: Schlumberger Technology CorporationInventors: Lennert David Den Boer, Colin Michael Sayers
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Patent number: 8447579Abstract: A method for performing an oilfield operation at a wellsite having a drilling rig configured to advance a drilling tool into a subsurface formation. The method includes generating a borehole temperature model for an area of interest using water depth information and a vertical stress model, generating a formation temperature model using the borehole temperature model, generating a mud-weight pressure model using the formation temperature model and pressure coefficients, generating a formation pore pressure model using the mud-weight pressure model, and adjusting the oilfield operation based on the formation pore pressure model.Type: GrantFiled: July 5, 2011Date of Patent: May 21, 2013Assignee: Schlumberger Technology CorporationInventors: Colin Michael Sayers, Lennert David den Boer
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Publication number: 20110264431Abstract: A method for performing an oilfield operation at a wellsite having a drilling rig configured to advance a drilling tool into a subsurface formation. The method includes generating a borehole temperature model for an area of interest using water depth information and a vertical stress model, generating a formation temperature model using the borehole temperature model, generating a mud-weight pressure model using the formation temperature model and pressure coefficients, generating a formation pore pressure model using the mud-weight pressure model, and adjusting the oilfield operation based on the formation pore pressure model.Type: ApplicationFiled: July 5, 2011Publication date: October 27, 2011Applicant: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Colin Michael Sayers, Lennert David den Boer
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Patent number: 7996199Abstract: A method for performing an oilfield operation at a wellsite having a drilling rig configured to advance a drilling tool into a subsurface formation. The method includes generating a borehole temperature model for an area of interest using water depth information and a vertical stress model, generating a formation temperature model using the borehole temperature model, generating a mud-weight pressure model using the formation temperature model and pressure coefficients, generating a formation pore pressure model using the mud-weight pressure model, and adjusting the oilfield operation based on the formation pore pressure model.Type: GrantFiled: August 6, 2007Date of Patent: August 9, 2011Assignee: Schlumberger Technology CorpInventors: Colin Michael Sayers, Lennert David den Boer
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Publication number: 20110087472Abstract: A technique includes identifying a fracture polygon intersecting a voxel of a three-dimensional grid of voxels representing a region of interest of a hydrocarbon-bearing reservoir based on data indicative of a discrete fracture network. The technique includes partitioning the polygon with a regular mesh of points and determining a number of the mesh points inside the voxel and inside the polygon. The technique includes estimating an area of the fracture inside the voxel based at least in part on the determined number of mesh points inside the voxel and inside the polygon. The technique includes determining at least one property of a portion of the hydrocarbon-bearing reservoir, which coincides with the voxel based at least in part on the estimated area of the fracture.Type: ApplicationFiled: April 7, 2010Publication date: April 14, 2011Applicant: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Lennert David den Boer, Colin Michael Sayers
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Publication number: 20100256964Abstract: A technique includes generating a fracture network model to characterize a fracture system in a reservoir that is associated with a well. The generation of the model includes constraining the model based at least in part on identified naturally occurring fractures and microseismic measurements that were acquired during a fracturing operation that was conducted in the well.Type: ApplicationFiled: April 7, 2009Publication date: October 7, 2010Applicant: Schlumberger Technology CorporationInventors: Donald W. Lee, Jose Ignacio Adachi, Lennert David den Boer, Joel Herve Le Calvez
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Publication number: 20080033704Abstract: A method for performing an oilfield operation at a wellsite having a drilling rig configured to advance a drilling tool into a subsurface formation. The method includes generating a borehole temperature model for an area of interest using water depth information and a vertical stress model, generating a formation temperature model using the borehole temperature model, generating a mud-weight pressure model using the formation temperature model and pressure coefficients, generating a formation pore pressure model using the mud-weight pressure model, and adjusting the oilfield operation based on the formation pore pressure model.Type: ApplicationFiled: August 6, 2007Publication date: February 7, 2008Applicant: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Colin Michael Sayers, Lennert David den Boer