Abstract: A method is provided for determining a mud weight window for an oil and gas well. One implementation of the method includes creating a 3D finite element model for at least a portion of the field in which the well is located. Next, at least three components of stress are determined using the 3D finite element model. The values of at least three of the stress components from the 3D finite element model may then be extracted and integrated with a ID analytical model for the well to determine the mud weight window for the well.

Abstract: Disclosed are a method and a system for controlling invoking of a hardware instruction. The method comprises: receiving a hardware instruction; determining whether the received hardware instruction is a legal instruction; and when it is determined that the received hardware instruction is a legal instruction, sending the hardware instruction to a corresponding hardware device. In this application, the legality of the hardware instruction is checked before the hardware instruction is sent to the hardware device, and only a legal hardware instruction can be sent to the hardware device for execution, thereby avoiding sending an illegal operation to the hardware device for execution, and improving the security of the hardware device.

Abstract: Well pressure control is integrated in real time with geomechanics determinations made during drilling. A well drilling method includes updating determinations of properties of a formation surrounding a wellbore in real time as the wellbore is being drilled; and controlling wellbore pressure in real time as the wellbore is being drilled, in response to the updated determinations of the formation properties. Another well drilling method includes obtaining sensor measurements in a well drilling system in real time as a wellbore is being drilled; transmitting the sensor measurements to a control system in real time; the control system determining in real time properties of a formation surrounding the wellbore based on the sensor measurements, and the control system transmitting in real time a pressure setpoint to a controller; and the controller controlling operation of at least one flow control device, thereby influencing a well pressure toward the pressure setpoint.

Abstract: System and methods are provided. In one embodiment, a system includes a first processor comprising a serial peripheral interface (SPI) port, and a second processor. The system further includes a galvanic isolation barrier. The system additionally includes a SPI bridge comprising a first output pin control configured to control a device. The SPI bridge additionally includes a first analog multiplexor control configured to route signals to a circuitry. The SPI bridge is configured to communicatively couple the first processor with the second processor through the galvanic isolation barrier, and to communicatively couple the first processor to the device through the first output pin control, and to route the signals between the first processor and the circuitry by using the first analog multiplexor control.

Abstract: This specification describes systems, methods, and software relating to geomechanical modeling of a subterranean region (104). In some aspects, finite difference (FD) grid data (200a) and finite element (FE) mesh data (202a) are received. The FD grid data include FD grid node locations (210) and FD grid values. The FD grid values include values of a subterranean formation property for each FD grid node location. The FE mesh data include FE mesh node locations (212) and spatial domains (214) for each of the FE mesh node locations. Values of the subterranean formation property are generated for each of the FE mesh node locations. The value for a given FE mesh node location is generated based on the FD grid values for FD grid node locations within the spatial domain about the given FE mesh node location. The generated values are assigned to the FE mesh node locations of the FE mesh data (202b) for geomechanical modeling of the subterranean region.

Abstract: System and methods are provided. In one embodiment, a system includes a first processor comprising a serial peripheral interface (SPI) port, and a second processor. The system further includes a galvanic isolation barrier. The system additionally includes a SPI bridge comprising a first output pin control configured to control a device. The SPI bridge additionally includes a first analog multiplexor control configured to route signals to a circuitry. The SPI bridge is configured to communicatively couple the first processor with the second processor through the galvanic isolation barrier, and to communicatively couple the first processor to the device through the first output pin control, and to route the signals between the first processor and the circuitry by using the first analog multiplexor control.

Abstract: This specification describes systems, methods, and software relating to geomechanical modeling of a subterranean region (104). In some aspects, finite difference (FD) grid data (200a) and finite element (FE) mesh data (202a) are received. The FD grid data include FD grid node locations (210) and FD grid values. The FD grid values include values of a subterranean formation property for each FD grid node location. The FE mesh data include FE mesh node locations (212) and spatial domains (214) for each of the FE mesh node locations. Values of the subterranean formation property are generated for each of the FE mesh node locations. The value for a given FE mesh node location is generated based on the FD grid values for FD grid node locations within the spatial domain about the given FE mesh node location. The generated values are assigned to the FE mesh node locations of the FE mesh data (202b) for geomechanical modeling of the subterranean region.

Abstract: Well pressure control is integrated in real time with geomechanics determinations made during drilling. A well drilling method includes updating determinations of properties of a formation surrounding a wellbore in real time as the wellbore is being drilled; and controlling wellbore pressure in real time as the wellbore is being drilled, in response to the updated determinations of the formation properties. Another well drilling method includes obtaining sensor measurements in a well drilling system in real time as a wellbore is being drilled; transmitting the sensor measurements to a control system in real time; the control system determining in real time properties of a formation surrounding the wellbore based on the sensor measurements, and the control system transmitting in real time a pressure setpoint to a controller; and the controller controlling operation of at least one flow control device, thereby influencing a well pressure toward the pressure setpoint.