skip to main content

DOE PAGESDOE PAGES

Title: Investigation of wellbore microannulus permeability under stress via experimental wellbore mock-up and finite element modeling

This research aims to describe the microannulus region of the cement sheath-steel casing interface in terms of its compressibility and permeability. Here, a wellbore system mock-up was used for lab-scale testing, and was subjected to confining and casing pressures in a pressure vessel while measuring gas flow along the specimen’s axis. The flow was interpreted as the hydraulic aperture of the microannuli. Numerical joint models were used to calculate stress and displacement conditions of the microannulus region, where the mechanical stiffness and hydraulic aperture were altered in response to the imposed stress state and displacement across the joint interface.
Authors:
 [1] ;  [2] ;  [2] ;  [3] ;  [3]
  1. Univ. of New Mexico, Albuquerque, NM (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  3. Univ. of New Mexico, Albuquerque, NM (United States)
Publication Date:
Report Number(s):
SAND-2016-9890J
Journal ID: ISSN 0266-352X; PII: S0266352X16302300
Grant/Contract Number:
AC04-94AL85000; DEFE0009562; SAND2016-4456J
Type:
Accepted Manuscript
Journal Name:
Computers and Geotechnics
Additional Journal Information:
Journal Volume: 83; Journal Issue: C; Journal ID: ISSN 0266-352X
Publisher:
Elsevier
Research Org:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org:
USDOE Office of Fossil Energy (FE); USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; wellbore; microannulus; numerical model; CO2 sequestration; fracture; joint model
OSTI Identifier:
1340517
Alternate Identifier(s):
OSTI ID: 1410722