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1. WO2018144029 - MULTI-LAYER DISTANCE TO BED BOUNDARY (DTBB) INVERSION WITH MULTIPLE INITIAL GUESSES

Publication Number WO/2018/144029
Publication Date 09.08.2018
International Application No. PCT/US2017/016672
International Filing Date 06.02.2017
IPC
E21B 7/04 2006.1
EFIXED CONSTRUCTIONS
21EARTH OR ROCK DRILLING; MINING
BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
7Special methods or apparatus for drilling
04Directional drilling
E21B 41/00 2006.1
EFIXED CONSTRUCTIONS
21EARTH OR ROCK DRILLING; MINING
BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
41Equipment or details not covered by groups E21B15/-E21B40/95
E21B 44/00 2006.1
EFIXED CONSTRUCTIONS
21EARTH OR ROCK DRILLING; MINING
BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
44Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
CPC
E21B 41/00
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
41Equipment or details not covered by groups E21B15/00 - E21B40/00
E21B 44/00
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
44Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems
E21B 47/022
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
47Survey of boreholes or wells
02Determining slope or direction
022of the borehole, e.g. using geomagnetism
E21B 7/04
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
7Special methods or apparatus for drilling
04Directional drilling
G01V 3/18
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
3Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
18specially adapted for well-logging
G01V 3/38
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
3Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
38Processing data, e.g. for analysis, for interpretation, for correction
Applicants
  • HALLIBURTON ENERGY SERVICES, INC. [US]/[US]
Inventors
  • SONG, Rencheng
  • PAN, Li
  • WU, Hsu-Hsiang
Agents
  • RAJ, Vinu
  • TIDWELL, Mark
  • BORLAND, Harold
  • LAYE, Jade O.
  • PITTMAN, David
  • BROWN, Randall C.
  • EDWARDS, Gary
  • HERDA, Alan
  • SUAREZ, Vera
  • HALBUR, Zachary
  • TU, Evert Uy
  • PAPE, Eileen
  • HARDAWAY, Kevin L.
  • DEMARCO, John
  • MENEZES, Clive
  • BRYSON, Alan C
  • FITE, Benjamin
  • RODDY, Craig
  • WUSTENBERG, John
  • RICHARDSON, Scott
  • KRUEGER, Tenley
Priority Data
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) MULTI-LAYER DISTANCE TO BED BOUNDARY (DTBB) INVERSION WITH MULTIPLE INITIAL GUESSES
(FR) INVERSION DE DISTANCE À LA LIMITE DE LIT (DTBB) MULTICOUCHE AVEC MULTIPLES ESTIMATIONS INITIALES
Abstract
(EN) System and methods for geosteering inversion are provided. A downhole tool's response along a path of a wellbore to be drilled through a formation is predicted over different stages of a downhole operation, based on each of a plurality of initial models of the formation. Each initial model represents a different number of formation layers over a specified range. The tool's actual response with respect to one or more formation parameters is determined, based on measurements obtained during a current stage of the operation. The actual response is compared with that predicted from each of the initial models. At least one of the models is selected as an inversion model, based on the comparison and a selection criterion. Inversion is performed for subsequent stages of the operation along the wellbore path, based on the selected model. The wellbore path is adjusted for the subsequent stages, based on the inversion results.
(FR) La présente invention concerne un système et des procédés d'inversion de géo-orientation. Une réponse d'outil en profondeur de forage le long d'un trajet d'un puits de forage destiné à être foré à travers une formation est prédite durant différentes étapes d'une opération en profondeur de forage, sur la base de chacun parmi une pluralité de modèles initiaux de la formation. Chaque modèle initial représente un nombre différent de couches de formation sur une étendue spécifiée. La réponse réelle de l'outil par rapport à un ou plusieurs paramètres de formation est déterminée sur la base de mesures obtenues pendant une étape actuelle de l'opération. La réponse réelle est comparée à celle prédite à partir de chacun des modèles initiaux. Au moins l'un des modèles est sélectionné en tant que modèle d'inversion, sur la base de la comparaison et d'un critère de sélection. L'inversion est effectuée pour des étapes suivantes de l'opération le long du trajet de puits de forage, sur la base du modèle sélectionné. Le trajet de puits de forage est ajusté pour les étapes suivantes, sur la base des résultats d'inversion.
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