Systems and methods include a method used in drilling wells. A three-dimensional (3D) uncertainty cube is generated for a subsurface geological structure containing a well target for drilling operations of a well. The 3D uncertainty cube defines an uncertainty of a geological position relative to a 3D structural model. The 3D uncertainty cube is dynamically updated in real time while drilling the well, including parameterizing the 3D uncertainty cube for a distance ahead of a drill bit. A probability that the well target will be hit is determined using the 3D uncertainty cube. The drilling operations of the well are dynamically re-planned and re-steered based on the updated 3D uncertainty cube, including updating a direction of the drilling operations of the well using the 3D uncertainty cube and the probability. Drilling and acquiring new information are continued to iteratively continue dynamic updates and continued drilling.

Systems and methods include a method used in drilling wells. A three-dimensional (3D) uncertainty cube is generated for a subsurface geological structure containing a well target for drilling operations of a well. The 3D uncertainty cube defines an uncertainty of a geological position relative to a 3D structural model. The 3D uncertainty cube is dynamically updated in real time while drilling the well, including parameterizing the 3D uncertainty cube for a distance ahead of a drill bit. A probability that the well target will be hit is determined using the 3D uncertainty cube. The drilling operations of the well are dynamically re-planned and re-steered based on the updated 3D uncertainty cube, including updating a direction of the drilling operations of the well using the 3D uncertainty cube and the probability. Drilling and acquiring new information are continued to iteratively continue dynamic updates and continued drilling.

A method for determining gravity toolface azimuth that can include rotating a logging tool about a center axis; positioning an accelerometer sensor within the logging tool at a first radial distance from the center axis; positioning an angular gyroscope sensor within the logging tool at a second radial distance from the center axis; receiving, at a controller, accelerometer sensor data from the accelerometer sensor and angular gyroscope sensor data from the angular gyroscope sensor as the logging tool rotates; determining, via the controller, a radial acceleration component of the accelerometer sensor from the accelerometer sensor data; determining, via the controller, a gain and an offset of the angular gyroscope sensor based on the radial acceleration component; and determining, via the controller, the gravity toolface azimuth of the logging tool as a function of time based on the gain, the offset, and the angular gyroscope sensor data.

A downhole drilling system for drilling a wellbore through a subterranean formation and a method of obtaining data from a downhole location. A bottom hole assembly (BHA) is locatable in the wellbore. A gravity sensor is operable to measure the Earth's gravity local to the BHA in three gravity vector coordinates. A magnetic sensor is operable to measure a magnetic field local to the BHA in three magnetic vector coordinates. A downhole processor is locatable in the borehole and operable to, if the gravity or magnetic measurements are not taken at a selected orientation of the BHA, process the measurements downhole by rotating the measured gravity and the measured magnetic field around the z-axis to align a gravity vector or a magnetic vector with the selected orientation of the BHA.

A downhole drilling system for drilling a wellbore through a subterranean formation and a method of obtaining data from a downhole location. A bottom hole assembly (BHA) is locatable in the wellbore. A gravity sensor is operable to measure the Earth's gravity local to the BHA in three gravity vector coordinates. A magnetic sensor is operable to measure a magnetic field local to the BHA in three magnetic vector coordinates. A downhole processor is locatable in the borehole and operable to, if the gravity or magnetic measurements are not taken at a selected orientation of the BHA, process the measurements downhole by rotating the measured gravity and the measured magnetic field around the z-axis to align a gravity vector or a magnetic vector with the selected orientation of the BHA.

A method for estimating a rate of penetration while drilling a subterranean wellbore includes estimating a first rate of penetration while drilling using a first measurement method, estimating a second rate of penetration while drilling using a second measurement method, and combining the first and second rates of penetration to obtain a combined rate of penetration of drilling.

A method for estimating a rate of penetration while drilling a subterranean wellbore includes estimating a first rate of penetration while drilling using a first measurement method, estimating a second rate of penetration while drilling using a second measurement method, and combining the first and second rates of penetration to obtain a combined rate of penetration of drilling.

In an example method, a system obtains, during a first subterranean drilling operation, first data indicating one or more characteristics of a drill bit of a drilling system, second data including sensor measurements regarding the drilling system, and third data indicating historical information regarding one or more additional subterranean drilling operations. The system determines a first metric based on the first data, a second metric based on the second data, and a third metric based on the third data. Further, the system determines a fourth metric based on the first metric, the second metric, and the third metric, where the fourth metric is indicative of a risk of a stuck pipe in the drilling system during the first subterranean drilling operation. The system generates a graphical user interface for presentation to a user, including an indication of the fourth metric.

Systems and methods include a method for generating a high-resolution advanced three-dimensional (3D) transient model that models multiple wells by integrating pressure transient data into a static geological model. A crude 3D model is generated from a full-field geological model that models production for multiple wells in an area. A functional 3D model is generated from the crude 3D model. An intermediate 3D model is generated by calibrating the functional 3D model with single-well data. An advanced 3D transient model is generated by calibrating multi-well data in the functional 3D model.

Systems and methods include a method for generating a high-resolution advanced three-dimensional (3D) transient model that models multiple wells by integrating pressure transient data into a static geological model. A crude 3D model is generated from a full-field geological model that models production for multiple wells in an area. A functional 3D model is generated from the crude 3D model. An intermediate 3D model is generated by calibrating the functional 3D model with single-well data. An advanced 3D transient model is generated by calibrating multi-well data in the functional 3D model.