skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: A quick method to determine subsidence, reservoir compaction, and in-situ stress induced by reservoir depletion

Abstract

This paper provides a quick method to determine subsidence, compaction, and in-situ stress induced by pore-pressure change. The method is useful for a reservoir whose Young's modulus is less than 20% or greater than 150% of the Young's modulus of the surrounding formation (where the conventional uniaxial strain assumption may not hold). In this work, a parameter study was conducted to find groups of parameters controlling the in-situ stress, subsidence, and compaction. These parameter groups were used to analyze the numerical calculation results generated by a three-dimensional (3D), general, nonlinear, finite-element model (FEM). The procedure and a set of figures showing how to calculate the in-situ stress, subsidence, and compaction induced by pore-pressure changes are provided. Example problems are also included to prevent confusion on sign convention and units. This work showed that Geertsma's results, which are based on no modulus contrast between cap and reservoir rocks, should be extended to simulate more closely real reservoirs, which generally have distinct property differences between the cap and reservoir rocks.

Authors:
; ; ;
Publication Date:
Research Org.:
9518811; Statoil (NO)
OSTI Identifier:
5929461
Resource Type:
Journal Article
Journal Name:
J. Pet. Technol.; (United States)
Additional Journal Information:
Journal Volume: 41:1
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 04 OIL SHALES AND TAR SANDS; 42 ENGINEERING; NORTH SEA; RESERVOIR PRESSURE; OIL SANDS; IN-SITU RETORTING; RESERVOIR ROCK; PARAMETRIC ANALYSIS; FINITE ELEMENT METHOD; FORMATION DAMAGE; HYDRAULIC FRACTURING; PERMEABILITY; POROSITY; PRODUCTIVITY; THREE-DIMENSIONAL CALCULATIONS; WELL CASINGS; YOUNG MODULUS; ATLANTIC OCEAN; BITUMINOUS MATERIALS; CARBONACEOUS MATERIALS; CHEMICAL REACTIONS; COMMINUTION; DECOMPOSITION; ENERGY SOURCES; FOSSIL FUELS; FRACTURING; FUELS; IN-SITU PROCESSING; MATERIALS; MECHANICAL PROPERTIES; NUMERICAL SOLUTION; PROCESSING; RETORTING; SEAS; SURFACE WATERS; 020300* - Petroleum- Drilling & Production; 020200 - Petroleum- Reserves, Geology, & Exploration; 040401 - Oil Shales & Tar Sands- In Situ Methods, True & Modified; 040201 - Oil Shales & Tar Sands- Site Geology- (-1989); 423000 - Engineering- Marine Engineering- (1980-)

Citation Formats

Morita, N, Whitfill, D L, Nygaard, O, and Bale, A. A quick method to determine subsidence, reservoir compaction, and in-situ stress induced by reservoir depletion. United States: N. p., 1989. Web. doi:10.2118/17150-PA.
Morita, N, Whitfill, D L, Nygaard, O, & Bale, A. A quick method to determine subsidence, reservoir compaction, and in-situ stress induced by reservoir depletion. United States. https://doi.org/10.2118/17150-PA
Morita, N, Whitfill, D L, Nygaard, O, and Bale, A. 1989. "A quick method to determine subsidence, reservoir compaction, and in-situ stress induced by reservoir depletion". United States. https://doi.org/10.2118/17150-PA.
@article{osti_5929461,
title = {A quick method to determine subsidence, reservoir compaction, and in-situ stress induced by reservoir depletion},
author = {Morita, N and Whitfill, D L and Nygaard, O and Bale, A},
abstractNote = {This paper provides a quick method to determine subsidence, compaction, and in-situ stress induced by pore-pressure change. The method is useful for a reservoir whose Young's modulus is less than 20% or greater than 150% of the Young's modulus of the surrounding formation (where the conventional uniaxial strain assumption may not hold). In this work, a parameter study was conducted to find groups of parameters controlling the in-situ stress, subsidence, and compaction. These parameter groups were used to analyze the numerical calculation results generated by a three-dimensional (3D), general, nonlinear, finite-element model (FEM). The procedure and a set of figures showing how to calculate the in-situ stress, subsidence, and compaction induced by pore-pressure changes are provided. Example problems are also included to prevent confusion on sign convention and units. This work showed that Geertsma's results, which are based on no modulus contrast between cap and reservoir rocks, should be extended to simulate more closely real reservoirs, which generally have distinct property differences between the cap and reservoir rocks.},
doi = {10.2118/17150-PA},
url = {https://www.osti.gov/biblio/5929461}, journal = {J. Pet. Technol.; (United States)},
number = ,
volume = 41:1,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 1989},
month = {Sun Jan 01 00:00:00 EST 1989}
}