Record Display for the EPA National Library CatalogRECORD NUMBER: 37 OF 66
|Main Title||Feasibility study of the effectiveness of drilling mud as a plugging agent in abandoned wells|
|Author||Smith, M. D. ; Perry, R. L. ; Stewart, G. F. ; Holloway, W. A. ; Jones, F. R.|
|CORP Author||Oklahoma State Univ., Stillwater.;Robert S. Kerr Environmental Research Lab., Ada, OK.|
|Publisher||U.S. Environmental Protection Agency, Robert S. Kerr Environmental Research Laboratory,|
|Subjects||Drilling muds ; Wells--United States ; Boring--United States|
|Additional Subjects||Injection wells ; Drilling fluids ; Sealers ; Feasibility ; Formation tests ; Experimental design ; Permeability ; Computerized simulation ; Environment simulation ; Data acquisition ; Measuring instruments ; Design criteria ; Performance evaluation ; Boreholes ; Liquid waste disposal ; Land pollution abatement ; Environmental monitoring ; Hazardous and Solid Waste Amendment of 1984 ; Environmental transport|
|Collation||204 p. : ill. ; 28 cm.|
The main objective of the feasibility study was to test the hypothesis that properly plugged wells are effectively sealed by drilling mud. While achieving such an objective, knowledge of the dynamics of building mud cake on the wellbore-face is obtained, as well as comprehension of changes that occur in drilling mud from the time it is placed in a well until it reaches equilibrium. A system was developed to simulate (a) building mud cake in a borehole, (b) plugging the well, and (c) injecting salt water into a nearby well, with concomitant migration of salt water into the plugged well. The system 'duplicates' reservoir pressures, mud pressures, and reservoir-formation characteristics that develop while mud cake is built, as in drilling a well. Salt-water injection is simulated, to monitor any fluid migration through the reservoir. A 2100-ft. well and ancillary equipment was constructed to permit controlled measurement and variation of simulated depth, porosity and permeability of reservoir rock, fluid composition, fluid pressure, injection pressure, and mud properties. Data can be recorded continuously by computer. The in-place system provides for extensive testing of the many variables that influence effective plugging of boreholes with drilling mud.
NTIS report number PB90-227232 Caption title. "June 1990." "EPA/600/2-90/022."