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1. WO2020139415 - MANAGING GAS BUBBLE MIGRATION IN A DOWNHOLE LIQUID

Publication Number WO/2020/139415
Publication Date 02.07.2020
International Application No. PCT/US2019/035396
International Filing Date 04.06.2019
IPC
E21B 41/00 2006.01
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 21/08 2006.01
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
21Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
08Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
CPC
E21B 21/08
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
21Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
08Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
E21B 2200/20
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
2200Special features related to earth drilling for obtaining oil, gas or water
20Computer models or simulations, e.g. for reservoirs under production, drill bits
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
Applicants
  • LANDMARK GRAPHICS CORPORATION [US]/[US]
Inventors
  • LU, Jianxin
  • PELLETIER, Michael T.
  • JAMISON, Dale E.
  • HAGHSHENAS, Arash
  • GAO, Li
Agents
  • GARDNER, Jason D.
  • KELTON, Zachary S.
Priority Data
62/785,93528.12.2018US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) MANAGING GAS BUBBLE MIGRATION IN A DOWNHOLE LIQUID
(FR) GESTION DE MIGRATION DE BULLES DE GAZ DANS UN LIQUIDE DE FOND DE TROU
Abstract
(EN)
Gas bubble migration can be managed in liquids. In one example, a system can execute wellbore-simulation software to simulate changes in gas dissolution in a liquid over time. This may involve dividing the wellbore into segments spanning from the well surface to the downhole location, each segment spanning a respective depth increment between the well surface and the downhole location. Next, for each time, the system can determine a respective multiphase-flow regime associated with each segment of the plurality of segments based on a simulated pressure level, a simulated temperature, a simulated pipe eccentricity, and a simulated fluid velocity at the segment. The system can also determine how much of the gas is dissolved in the liquid at each segment based on the respective multiphase-flow regime at the segment. The system can display a graphical user interface representing the gas dissolution in the liquid over time.
(FR)
L'invention concerne la gestion de la migration de bulles de gaz dans des liquides. Dans un exemple, un système peut exécuter un logiciel de simulation de puits de forage pour simuler des changements de dissolution de gaz dans un liquide au cours du temps. Ceci peut consister à diviser le puits de forage en segments s'étendant de la surface de puits à l'emplacement de fond de trou, chaque segment couvrant un incrément de profondeur respectif entre la surface de puits et l'emplacement de fond de trou. Ensuite, à chaque fois, le système peut déterminer un régime d'écoulement polyphasique respectif associé à chaque segment de la pluralité de segments sur la base d'un niveau de pression simulé, d'une température simulée, d'une excentricité de tuyau simulée et d'une vitesse de fluide simulée au niveau du segment. Le système peut également déterminer la quantité de gaz dissous dans le liquide au niveau de chaque segment sur la base du régime d'écoulement polyphasique respectif au niveau du segment. Le système peut afficher une interface utilisateur graphique représentant la dissolution de gaz dans le liquide au cours du temps.
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