Email RIS file
Bookmark
Report an Issue

Analysis of stress sensitivity and its influence on oil productionfrom tight reservoirs [electronic resource].

Published
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2007.
Additional Creators
United States. Department of Energy. Office of Scientific and Technical Information
Access Online

Availability

I Want It
I Want It

Finding items...

Restrictions on Access
Free-to-read Unrestricted online access
Summary
This paper presents a study of the relationship betweenpermeability and effective stress in tight petroleum reservoirformations. Specifically, a quantitative method is developed to describethe correlation between permeability and effective stress, a method basedon the original in situ reservoir effective stress rather than ondecreased effective stress during development. The experimental resultsshow that the relationship between intrinsic permeability and effectivestress in reservoirs in general follows a quadratic polynomial functionalform, found to best capture how effective stress influences formationpermeability. In addition, this experimental study reveals that changesin formation permeability, caused by both elastic and plasticdeformation, are permanent and irreversible. Related pore-deformationtests using electronic microscope scanning and constant-rate mercuryinjection techniques show that while stress variation generally has smallimpact onrock porosity, the size and shape of pore throats have asignificant impact on permeability-stress sensitivity. Based on the testresults and theoretical analyses, we believe that there exists a cone ofpressure depression in the area near production within suchstress-sensitive tight reservoirs, leading to a low-permeability zone,and that well production will decrease under the influence of stresssensitivity.
Report Numbers
E 1.99:lbnl--63410
lbnl--63410
Other Subject(s)
Note
Published through SciTech Connect.
08/28/2007.
"lbnl--63410"
2007 Society of Petroleum Engineers (SPE) EasternRegional Meeting, Lexington, KY, 17-19 October2007.
Wu, Yu-Shu; Xiong, Wei; Lei, Qun; Yuan, Cui.
COLLABORATION - Collaboration with ResearchInst. of Petroleum Exploration and Development of Langfang, PetroChinaCorp.
Inst. of Porous Fluid Mechanics of Chinese Academy of Sciences
Research Inst.
Funding Information
DE-AC02-05CH11231
G6W005
View MARC record | catkey: 14131391