The Engineering of Oil-well Abandonments
- William E. Schoeneck (Ohio Oil Co.)
- Document ID
- Society of Petroleum Engineers
- Transactions of the AIME
- Publication Date
- December 1946
- Document Type
- Journal Paper
- 147 - 158
- 1946. Original copyright American Institute of Mining, Metallurgical, and Petroleum Engineers, Inc. Copyright has expired.
- 4.1.5 Processing Equipment, 4.3.4 Scale, 4.1.2 Separation and Treating, 1.6 Drilling Operations, 1.6.11 Plugging and Abandonment, 3 Production and Well Operations, 5.2 Reservoir Fluid Dynamics, 3.2.4 Acidising, 2.4.3 Sand/Solids Control, 5.5.2 Core Analysis, 2.2.2 Perforating
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This paper presents the problem of oil-well abandonment as a group of studiesinvolving the compilation of physical well data, the use of special curves,maps and interpretative procedures, in order that operations can be analyzedand means for reducing costs can be effected.
Methods for the calculation of the economic limit of production and resultantoil reserves are suggested in order that profitable production may be continuedand premature abandonment prevented.
Extensive studies have been made and much has been written on the proceduresfor prospecting, drilling, completion, production and repair of oil wells, butthe writer has long felt the need for a study of the procedure that should befollowed when considering the abandonment of a well. The production fromnumerous well bores of a fluid material (a circumstance peculiar to the oilindustry) that is continually decreasing in quantity leads to an increasingratio of operating cost to production. It is for this reason that oil fieldsare not abandoned as a whole and detailed consideration of each well isrequired before it can be determined whether more is being expended than willbe returned on any well or lease in question. It is the purpose of this paper,therefore, to compile, correlate, and present all matters worthy ofconsideration in the problem of oil-well abandonment; to suggest interpretativeprocedures, the possibilities for corrective measures conductive to economicalproduction, thereby extending both profitable reserves and lengths oflife.
Scope and Approach
Compiling data and outlining a study having the complexity of the problem athand and naturally subject to the personal experiences of one who undertakesthe study; however , the chosen approach and grouping of the subject materialmay be helpful in the consideration of abandonment problems. Consideration hasbeen given to wells that make gas and water incident with the production ofoil; but considerationhas not been given to either gas or wells orcondensate-producing wells, for wells of the latter type have sufficientproblems to warrant separate investigation. The major subdivisions of thispaper- physical considerations and economic considerations and economicconsiderations- do not imply that either of these phases can be consideredindependently, but rather that the two are mutually dependent and are thecomponent parts of and engineering study.
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