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US 12,612,855 B2Granted
System and method for determining well correlation
AssigneeSchlumberger Technology Corporation
InventorsIshan Raina, Sylvain Wlodarczyk
Life of this patent
Estimating the term…
Abstract
A method includes determining a search window in a target well. The method also includes identifying one or more reference wells based at least partially upon a location of the target well. The method also includes predicting a plurality of locations of a target well marker in the target well based at least partially upon the one or more reference wells. The locations of the target well marker are within the search window. The method also includes determining similarity values for the locations of the target well marker. The method also includes assigning the target well marker to at least one of the locations based at least partially upon the similarity values.
Claims19
A method, comprising:
- receiving a target well log having a name, a unit, and a description assigned thereto;
- identifying a plurality of first entries in a database that have a unit and a measurement type assigned thereto, wherein the units of the plurality of first entries are compatible with the unit of the target well log, and wherein the measurement type of the plurality of first entries comprises one or more first n-grams;
- generating a corpus of words from the measurement types of the plurality of first entries;
- modifying the description of the target well log based at least partially upon the corpus of words, wherein the modified description of the target well log comprises one or more second n-grams;
- identifying one or more second entries in the database having a measurement type assigned thereto that at least partially matches the modified description of the target well log, wherein identifying the one or more second entries comprises identifying the one or more first n-grams that match the one or more second n-grams;
- assigning the measurement type of the one or more second entries to the target well log;
- determining a search window in the target well log;
- identifying one or more reference wells based at least partially upon the target well log;
- predicting a plurality of locations of a target well marker in the target well log based at least partially upon the one or more reference wells, wherein the plurality of locations of the target well marker are within the search window;
- determining similarity values for the plurality of locations of the target well marker;
- automatically assigning the target well marker to at least one of the plurality of locations based at least partially upon the similarity values;
- and
- automatically performing a wellsite activity based on the target well log, wherein the wellsite activity is at least one of:
- modifying a trajectory of a wellbore;
- drilling the wellbore in a subterranean formation based at least partially on the modified trajectory;
- varying a weight on the drill bit (WOB);
- varying a rate of penetration (ROP);
- varying a type of fluid pumped into the wellbore;
- varying a volumetric rate of fluid pumped into the wellbore;
- or
- a combination thereof.
18 more elements
A method, comprising:
- determining a search window in a target well, wherein determining the search window in the target well comprises determining a first target well boundary and a second target well boundary;
- identifying one or more reference wells based at least partially upon a location of the target well, wherein the one or more reference wells comprise a first reference well boundary, a second reference well boundary, and a reference well marker, wherein a predetermined confidence level exists that a reference well marker is positioned between the first reference well boundary and the second reference well boundary, and wherein a distance between the first and second reference well boundaries is less than a distance between the first target well boundary and the second target well boundary;
- predicting a plurality of locations of a target well marker in the target well based at least partially upon the one or more reference wells, wherein the locations of the target well marker are within the search window, wherein the predetermined confidence level exists that the target well marker is positioned between the first target well boundary and the second target well boundary;
- determining similarity values for the locations of the target well marker;
- automatically assigning the target well marker to at least one of the plurality of locations based at least partially upon the similarity values;
- and
- automatically controlling a wellsite activity based on the target well marker, wherein the wellsite activity is at least one of:
- modifying a trajectory of a wellbore;
- drilling the wellbore in a subterranean formation based at least partially on the modified trajectory;
- varying a weight on the drill bit (WOB);
- varying a rate of penetration (ROP);
- varying a type of fluid pumped into the wellbore;
- varying a volumetric rate of fluid pumped into the wellbore;
- or
- a combination thereof.
12 more elements
A method, comprising:
- receiving a target well log having a unit and a description assigned thereto;
- identifying a plurality of first entries in a database that have a unit and a measurement type assigned thereto, wherein the units of the plurality of first entries are compatible with the unit of the target well log;
- generating a corpus of words based on the measurement types of the first entries, wherein generating the corpus of words comprises generating one or more n-grams based at least partially upon the measurement types of the first entries;
- modifying the description of the target well log based at least partially upon the corpus of words;
- identifying one or more second entries in the database having a measurement type assigned thereto that at least partially matches the modified description of the target well log;
- automatically assigning the measurement type of the one or more second entries to the target well log;
- and
- automatically performing a wellsite activity based on the target well log, wherein the wellsite activity is at least one of:
- modifying a trajectory of a wellbore;
- drilling the wellbore in a subterranean formation based at least partially on the modified trajectory;
- varying a weight on the drill bit (WOB);
- varying a rate of penetration (ROP);
- varying a type of fluid pumped into the wellbore;
- varying a volumetric rate of fluid pumped into the wellbore;
- or
- a combination thereof.
13 more elements
Dependencies are inferred from the claim text.