Abstract: A method of subsurface sequestration of CO2 in a subsurface formation, the method including: producing formation water and hydrocarbons from a first well located within the first region while concurrently injecting an aqueous CO2 solution into a second well located within the second region, wherein the subsurface formation comprises a first region and a second region, the first region and the second region being fluidly connected, and the second region is at a greater depth than the first region and comprises at least one of the subsurface sequestration locations; and allowing the aqueous CO2 solution to sink as a negatively buoyant fluid below the formation water and the hydrocarbons, thereby sequestering the CO2 in the second region of the subsurface formation and wherein the aqueous CO2 solution has a greater density than the formation water and the hydrocarbons, making the aqueous CO2 solution negatively buoyant in the subsurface formation.

Abstract: Systems and methods include a computer-implemented method for determining and storing a length scale dimension in spatial coordinate systems. A mapping of three-dimensional (3D) grid locations (x,y,z) relative to a continuous surface of the Earth is determined. The 3D grid locations have a grid point spacing in an (x,y) space defining map view coordinates of the continuous surface independent of an elevation z. A length scale (l) is determined for each 3D location. The length scale defines a 3D distance between 3D grid locations, and also defines a structural or geometrical length scale at the 3D location relevant to a given task. Then, (x,y,z,l) information is stored for each 3D grid location. The (x,y,z,l) information defines, for each (x,y) coordinate, a z-coordinate defining an elevation of the continuous surface at the (x,y) coordinate and the local length scale at the (x,y,z) coordinate.

Abstract: A computer-implemented method includes: generating a geological structure map for a subsurface of a reservoir; generating a set of tilt maps for the geological structure map, each tilt map representing a hydrodynamic condition in the reservoir; combining each tilt map with the geological structure map so that the geological structure map is recast to generate a set of hydrodynamic structure maps, wherein each hydrodynamic structure map corresponds to a hydrodynamic condition; and identifying one or more closures in each hydrodynamic structure map of the set of hydrodynamic structure maps such that potential hydrodynamic traps in the subsurface of the reservoir are automatically scanned when the set of hydrodynamic structure maps have been scanned, wherein each closure represents a potential hydrodynamic trap in the subsurface where fluid can accumulate under the hydrodynamic gradient.

Abstract: Systems and methods include a computer-implemented method for identifying geological structural trends. A cross section with visible geological fault markers for geological structures is received. An angle of inclination of a fault is measured. An average seismic velocity to convert z-axis values from a two-way travel time to a depth is determined. A depth conversion is implemented. A horizontal scale and a vertical scale are compared to determine an aspect ratio of a depth section of the cross section, including determining a vertical exaggeration. The aspect ratio of the depth section is corrected for the vertical exaggeration to obtain an accurate measurement of fault inclination in the cross section. A structural style and an expected true fault inclination are determined for the depth section. An angle of obliquity and a structural trend are determined using the expected true fault inclination compared with the measured angle of inclination of the fault.

Abstract: Methods and systems for determining a geological structural style of a subterranean formation include acquiring seismic reflection measurements of the subterranean formation; isolating one or more signals in the acquired measurements, the one or more signals having larger amplitudes relative to one or more other signals in the acquired measurements; obtaining a set of structural geology geometric primitives wherein each structural geology geometric primitive comprises geometric data representing a known structural geological style; identifying at least one best fit between a set of the one or more isolated signals and a structural geology geometric primitive from the set of structural geology geometric primitives; determining a degree of confidence for at least one best fit identified; and determining a geological structural style of the subterranean formation based on the identified at least one best fit and based on the determined degree of confidence for that best fit.

Abstract: Systems and methods include a computer-implemented method for displaying well information. Geological boundaries are identified for a group of multiple wells in a region including a reference well. Each well has geological boundaries at depths different from boundaries in the reference well. A framework of the geological boundaries of the reference well multiple wells is treated as a set of datums for shifting pressures relative to the reference well. Geological boundaries of the group of multiple wells are matched, including identifying tops and bases of geological layers for each well. Depth shifts for depths having corresponding pressure data are determined. The depth shifts are redatumed based on differences in depth of the geological layers of each well. A display of a graph is presented in a graphical user interface (GUI). The graph maps pressures of the group of multiple wells at different depths and based on redatuming of each well.

Abstract: Example computer-implemented methods, media, and systems for rapidly identifying hydrodynamic traps in hydrocarbon reservoirs are disclosed. One example computer-implemented method includes receiving a depth structure map of a geological structure associated with a subsurface reservoir. Multiple pairs of tilt value and tilt azimuth value associated with a fluid contact of the subsurface reservoir are received. A respective set of hydrodynamic traps associated with the subsurface reservoir is determined for each pair of tilt value and tilt azimuth value and based at least on the depth structure map. It is determined that there exist a common subset of hydrodynamic traps from the respective set of hydrodynamic traps of each pair of tilt value and tilt azimuth value. One or more locations of potential wells associated with the subsurface reservoir are identified based at least on the determined common subset of hydrodynamic traps.

Abstract: Example computer-implemented methods, media, and systems for determining a total gross rock volume (GRV) of multiple hydrocarbon reservoir units at a site are disclosed. One example method includes receiving multiple data points with each including an element representing a depth of a location on a structure depth map of a first reservoir unit at a site and another element representing a volume enclosed by the structure depth map and between the location and a closing contour of the first reservoir unit. A function representing a relationship between a GRV of a reservoir unit at the site and a closure height of the reservoir unit is curve fit to the multiple data points. A GRV of each of multiple reservoir units at the site is determined using the function. A total GRV of the multiple reservoir units is determined based on the GRV of each of the multiple reservoir units.

Abstract: Embodiments herein relate to a computer-implemented technique that includes generating, in a first portion of a graphical user interface (GUI), a first graphical element related to reflection seismic data of an area of interest. The technique further includes generating, in a second portion of the GUI, a second graphical element related to well structural data of the area of interest. The technique further includes generating, in a third portion of the GUI, a third graphical element that is based on the reflection seismic data and the well structural data. In embodiments, an alteration of the first graphical element or the second graphical element results in a concurrent alteration of the third graphical element. Other embodiments may be described or claimed.

Abstract: A method for determining a pressure profile in a subterranean formation is described. The method includes drilling a wellbore in the subterranean formation; lowering a logging tool into the wellbore to measure resistivity values as a function of depth along the wellbore; identifying a plurality of porous zones from the wellbore based on petrophysical logs; converting the measured resistivity values to an amount of total dissolved solids for each of the plurality of identified porous zones; converting the amount of total dissolved solids to a pore fluid density; calculating a pressure based on a sum of the pore fluid densities derived along a length of the well; and generating a depth-based pressure profile.

Abstract: A method of subsurface sequestration of CO2 in a subsurface formation, the method including: producing formation water and hydrocarbons from a first well located within the first region while concurrently injecting an aqueous CO2 solution into a second well located within the second region, wherein the subsurface formation comprises a first region and a second region, the first region and the second region being fluidly connected, and the second region is at a greater depth than the first region and comprises at least one of the subsurface sequestration locations; and allowing the aqueous CO2 solution to sink as a negatively buoyant fluid below the formation water and the hydrocarbons, thereby sequestering the CO2 in the second region of the subsurface formation and wherein the aqueous CO2 solution has a greater density than the formation water and the hydrocarbons, making the aqueous CO2 solution negatively buoyant in the subsurface formation.

Abstract: A method of subsurface sequestration of CO2 in a subsurface formation, the method including: identifying one or more subsurface sequestration locations in the subsurface formation, wherein the subsurface formation includes a first region, a second region, a first well located within the first region, a second well located within the second region, formation water, and hydrocarbons naturally present in the subsurface formation; producing the formation water and the hydrocarbons from the first well while concurrently injecting an aqueous CO2 solution into the second well; and allowing the aqueous CO2 solution to sink as a negatively buoyant fluid below the subsurface water and hydrocarbons, thereby sequestering the CO2 in the second region of the subsurface formation and wherein the aqueous CO2 solution has a greater density than the formation water and the hydrocarbons, making the aqueous CO2 solution negatively buoyant in the subsurface formation.

Abstract: A method of subsurface sequestration of CO2 in a subsurface formation, the method including: identifying one or more subsurface sequestration locations in the subsurface formation, wherein the subsurface formation includes a first region, a second region, a first well located within the first region, a second well located within the second region, formation water, and hydrocarbons naturally present in the subsurface formation; producing the formation water and the hydrocarbons from the first well while concurrently injecting an aqueous CO2 solution into the second well; and allowing the aqueous CO2 solution to sink as a negatively buoyant fluid below the formation water and hydrocarbons, thereby sequestering the CO2 in the second region of the subsurface formation and wherein the aqueous CO2 solution has a greater density than the formation water and the hydrocarbons, making the aqueous CO2 solution negatively buoyant in the subsurface formation.

Abstract: Systems and methods include a computer-implemented method for determining and storing a length scale dimension in spatial coordinate systems. A mapping of three-dimensional (3D) grid locations (x,y,z) relative to a continuous surface of the Earth is determined. The 3D grid locations have a grid point spacing in an (x,y) space defining map view coordinates of the continuous surface independent of an elevation z. A length scale (l) is determined for each 3D location. The length scale defines a 3D distance between 3D grid locations, and also defines a structural or geometrical length scale at the 3D location relevant to a given task. Then, (x,y,z,l) information is stored for each 3D grid location. The (x,y,z,l) information defines, for each (x,y) coordinate, a z-coordinate defining an elevation of the continuous surface at the (x,y) coordinate and the local length scale at the (x,y,z) coordinate.

Abstract: Systems and methods include a computer-implemented method includes concurrently outputting, by a computing device to a display of the computing device, a graphical time-domain interpretation of seismic data, a graphical velocity model related to the seismic data, and a graphical depth-domain interpretation of the seismic data. The method may further include identifying, by the computing device, a first alteration to one of the time-domain interpretation, the velocity model, and the depth-domain interpretation. The method may further include identifying, by the computing device based on the first alteration, a second alteration to another of the time-domain interpretation, the velocity model, and the depth-domain interpretation. The method may further include updating, by the computing device based on the first alteration and the second alteration, at least two of the graphical time-domain interpretation, the graphical velocity model, and the graphical depth-domain interpretation.

Abstract: A computer-implemented method for well location optimization for high inclination complex well trajectories includes calculating a thickness of a target geological layer with respect to a planned intersection angle between wellbores and the target geological layer, wherein the target geological layer comprises a known complex geology. A sensitivity of the wellbores is calculated based on reservoir parameters derived from the calculated thickness of the target geological layer at the planned intersection angle. A least sensitive wellbore is selected from the wellbores, wherein the least sensitive wellbore of the wellbores has a lowest uncertainty in geological layer orientation and wellbore orientation.

Abstract: Methods and systems, including computer programs encoded on a computer storage medium can be used for adaptive multi-scale geological modeling and well integration. The systems and methods are used to integrate seismic mapping data and well data for a subsurface region that includes a reservoir. The specification describes an example algorithm that is used to adaptively identify and isolate natural length scales in a seismic map. The identified natural length scales are then used to determine appropriate filtering of well information and ultimately achieve an automatic integration of orientation information from seismic map and well information.

Abstract: A method and a system for sequestering carbon dioxide (CO2) while producing freshwater are provided. An exemplary method includes producing saline water from a saline aquifer, desalinating at least a portion of the saline water, producing freshwater and waste brine, mixing waste CO2 with the waste brine forming a brine/CO2 mixture, and injecting the brine/CO2 mixture into the saline aquifer.

Abstract: A process for drilling a well into a subsurface formation includes receiving data representing depth maps for a given subsurface region, each depth map being generated from seismic data acquired in a seismic survey at a subsurface region. The process includes determining, for depth maps of the plurality, respective weight values; generating data representing a combination of the depth maps based on the respective weight values; generating a cumulative distribution function (CDF) for a particular location in the subsurface region based on the data representing a combination of the depth maps; determining, based on the CDF for that particular location, a probability value representing a depth at which a geological layer occurs in the subsurface region at the particular location; and drilling the well into the subsurface formation at the particular location to a target depth based on the probability value.

Abstract: In accordance with one or more embodiments of the present disclosure, a method of subsurface sequestration of CO2 in a geological basin includes identifying one or more subsurface sequestration locations in the geological basin and injecting an aqueous CO2 solution to be sequestered into the geological basin. The one or more subsurface sequestration locations are regions of deeper geological structure, relative to an adjacent shallower geological structure, into which a negatively buoyant fluid injected into the basin will sink. The aqueous CO2 solution comprises a density that is greater than the density of the water naturally present in the geological basin, such that the injected aqueous CO2 solution pools in the one or more subsurface sequestration locations.