Determination of in-situ stress perturbation using potential fields data
AssigneeSaudi Arabian Oil Company
InventorsOtto Meza Camargo, Karla Olvera Carranza, Dumitru Ion
Life of this patent
Estimating the term…
Abstract
Determination of an in-situ stress perturbation model for a subsurface geological structure by using potential fields data. Potential fields data, such as gravity data, may be obtained and attributes may be determined from the gravity data. Lineaments that define the structural framework of the basement may be derived from an interpretation of the attributes. The lineaments may be combined with an in-situ stress direction and used as constraints in a finite element geomechanical simulation to generate the in-situ stress perturbation model.
Claims24
A method of determining in-situ stress perturbation using potential fields data to identify lineaments in a subsurface geological structure having a subsurface hydrocarbon reservoir, the method comprising:
- determining an in-situ stress direction indicator in the subsurface geological structure;
- obtaining Bouguer gravity data in the subsurface geological structure;
- processing the Bouguer gravity data to determine one or more attributes, the one or more attributes comprising an upward continuation, a spatial band-pass filter, a first vertical derivative, a horizontal gradient filter, a tilt angle filter, and a normalized horizontal gradient filter;
- generating one or more respective attribute maps based on the one or more attributes, each of the one or more attribute maps identifying a value of the attribute in the subsurface geological structure;
- identifying a lineament in the subsurface geological structure from the one or more attribute maps;
- and
- combining the lineament and the in-situ stress direction indicator in a three-dimensional (3D) mechanical earth model to determine the in-situ stress perturbation in the subsurface geological structure.
A non-transitory computer-readable storage medium having executable code stored thereon for determining in-situ stress perturbation using potential fields data to identify lineaments in a subsurface geological structure having a subsurface hydrocarbon reservoir, the executable code comprising a set of instructions that causes a processor to perform operations comprising:
- determining an in-situ stress direction indicator in the subsurface geological structure;
- obtaining Bouguer gravity data in the subsurface geological structure;
- processing the Bouguer gravity data to determine one or more attributes, the one or more attributes comprising an upward continuation, a spatial band-pass filter, a first vertical derivative, a horizontal gradient filter, a tilt angle filter, and a normalized horizontal gradient filter;
- generating one or more respective attribute maps based on the one or more attributes, each of the one or more attribute maps identifying a value of the attribute in the subsurface geological structure;
- identifying a lineament in the subsurface geological structure from the one or more attribute maps;
- and
- combining the lineament and the in-situ stress direction indicator in a three-dimensional (3D) mechanical earth model to determine the in-situ stress perturbation in the subsurface geological structure.
A system for determining in-situ stress perturbation using potential fields data to identify lineaments in a subsurface geological structure having a subsurface hydrocarbon reservoir, comprising:
- a processor;
- a non-transitory computer-readable memory accessible by the processor and having executable code stored thereon, the executable code comprising a set of instructions that causes the processor to perform operations comprising:
- determining an in-situ stress direction indicator in the subsurface geological structure;
- obtaining Bouguer gravity data in the subsurface geological structure;
- processing the Bouguer gravity data to determine one or more attributes, the one or more attributes comprising an upward continuation, a spatial band-pass filter, a first vertical derivative, a horizontal gradient filter, a tilt angle filter, and a normalized horizontal gradient filter;
- generating one or more respective attribute maps based on the one or more attributes, each of the one or more attribute maps identifying a value of the attribute in the subsurface geological structure;
- identifying a lineament in the subsurface geological structure from the one or more attribute maps;
- and
- combining the lineament and the in-situ stress direction indicator in a three-dimensional (3D) mechanical earth model to determine the in-situ stress perturbation in the subsurface geological structure.
Dependencies are inferred from the claim text.