Back to results
US 2026/0168376 A1Published application
Systems and methods for automated interpreted lithology
AssigneeSchlumberger Technology Corporation
InventorsMatthias Francois, Can Evren Yarman
Life of this patent
Estimating the term…
Abstract
A method for automated interpreted lithology, the method comprising drilling within a specified depth range of a subterranean formation, generating first and second measurement logs while drilling, quantifying, based on drill bit cuttings formed during drilling, respective percentages of lithologies contained in the subterranean formation, obtaining a category table that defines respective category scores associated with the lithologies, determining combined measurements based on the first and second measurement logs, and associating, based in part on the category scores, the percentages, and the combined measurements, each depth included in the specified depth range with a corresponding lithology.
Claims20
A method for automated interpreted lithology, the method comprising:
- drilling, using a drill bit coupled to a drill string, within a specified depth range of a subterranean formation;
- generating a first measurement log and a second measurement log while drilling;
- identifying, based on drill bit cuttings formed during drilling, a plurality of lithologies contained within the specified depth range of the subterranean formation, the plurality of lithologies including at least a first lithology and a second lithology;
- quantifying, based on the drill bit cuttings, a first percentage of the first lithology contained in the subterranean formation and a second percentage the second lithology contained in the subterranean formation;
- obtaining a category table that defines a first category score associated with the first lithology and a second category score associated with second lithology;
- determining, based in part on the first measurement log and the second measurement log, a plurality of combined measurement values, where each combined measurement value included in the plurality of combined measurement values corresponds to a respective depth within the specified depth range;
- associating, based in part on the first category score, the second category score, the first percentage, the second percentage, and the plurality of combined measurement values, at least a first depth included the specified depth range with a lithology included in the plurality of lithologies;
- generating a visual representation of an association between the first depth and the corresponding lithology;
- and
- displaying, on a display device, the visual representation.
7 more elements
A system for drilling a well in a subterranean formation, comprising:
- a drill string suspended at an upper end by a kelly and a traveling block;
- a drill bit attached to a lower end of the drill string, the drill bit adapted to rotate during drilling;
- a pump adapted pump drilling fluid through the drill string;
- a shale shaker adapted to remove drill bit cuttings from the drilling fluid;
- a logging-while-drilling (LWLD) module adapted to generate a first measurement log during drilling;
- a measurement-while-drilling (MWD) module adapted to generate a second measurement log during drilling;
- and
- a control system comprising one or more processors and a display device, the control system adapted to:
- receive, from the LWD module, a first measurement log that was generated during drilling within a specified depth range of the subterranean formation;
- receive, from the MWD module, a second measurement log that was generated during drilling within a specified depth range of the subterranean formation;
- identify, based on the drill bit cuttings, a plurality of lithologies contained within the specified depth range of the subterranean formation, the plurality of lithologies including at least a first lithology and a second lithology;
- quantify, based on the drill bit cuttings, a first percentage of the first lithology contained in the subterranean formation and a second percentage the second lithology contained in the subterranean formation;
- obtain a category table that defines a first category score associated with the first lithology and a second category score associated with second lithology;
- determine, based in part on the first measurement log and the second measurement log, a plurality of combined measurement values, where each combined measurement value included in the plurality of combined measurement values corresponds to a respective depth within the specified depth range;
- and
- associate, based in part on the first category score, the second category score, the first percentage, the second percentage, and the plurality of combined measurement values, at least a first depth included the specified depth range with a lithology included in the plurality of lithologies.
13 more elements
A computing device, comprising:
- a display device;
- and
- a processor coupled to the display device, the processor adapted to:
- receive a first measurement log associated with a specified depth range in a subterranean formation;
- receive a second measurement log associated with the specified depth range in the subterranean formation;
- receive a lithology quantification associated with the specified depth range in the subterranean formation, the lithology quantification indicating a first percentage of a first lithology contained in the subterranean formation and a second percentage of a second lithology contained in the subterranean formation;
- obtain a category table that defines a first category score associated with the first lithology and a second category score associated with second lithology;
- determine, based in part on the first measurement log and the second measurement log, a plurality of combined measurement values, where each combined measurement value included in the plurality of combined measurement values corresponds to a respective depth within the specified depth range;
- associate, based in part on the first category score, the second category score, the first percentage, the second percentage, and the plurality of combined measurement values, at least a first depth included the specified depth range with a lithology included in the plurality of lithologies;
- generate a visual representation of an association between the first depth and the corresponding lithology;
- and
- display the visual representation on the display device.
9 more elements
Dependencies are inferred from the claim text.