scope:

Foreword

a. This bulletin was prepared by the API Subcommittee on Recovery Efficiency working under the administration of the American Petroleum Institute Production Department's Executive Committee on Drilling and Production Practice.

b. API Bulletin D14: A Statistical Study of Recovery Efficiency, First Edition, October 1967, presented conclusions and equations which evolved from a study undertaken by the API Subcommittee on Recovery Efficiency in 1956. The Subcommittee's assignment then was to study reservoir recovery processes based on actual performance data from producing fields rather than on theoretical or laboratory data. The objective of the current study was to expand the data base of the original study and study oil recovery based on actual field performance data.

c. This Second Edition supersedes and replaces the First Edition, October 1967.

d. Every effort has been made by API to assure the accuracy and reliability of data contained in this report. However, the Institute makes no representation, warranty, or guarantee in connection with the report contents and hereby expressly disclaims any liability or responsibility for loss or damage resulting from use or application hereunder, for any violation of Federal, state, or municipal regulation with which the contents may conflict, or for the infringement of any patent resulting from the use of this publication.

e. Contents of this report are not intended to inhibit developing technology or improvements in equipment or improved operational procedures. The report is not a substitute for qualified engineering analysis and judgment to fit specific operations.

f. Members of the Subcommittee on Recovery Efficiency who devoted a substantial amount of time and effort in preparing this report are as follows:

T. M. Doscher, Chairman, The Doschers Group Inc., Los Angeles, Calif.

G. G. Cook, Marathon Oil Co., Findlay, Ohio

Carl Grubeman, Sun Expl. & Prod. Co., Dallas, Tex.

J. C. Joers, Conoco Inc., Houston, Tex.

R. L. Jewett, Pennzoil Co., Houston, Tex.

B. C. McRee, Petromac Inc., Houston, Tex.

R. T. Miller, Shell Oil Co., Houston, Tex.

R. P. Murray, Cities Service Co., Tulsa, Okla.

A. Omelchuck, Marathon Oil Co., Findlay, Ohio

L. E. Roberts, ARCO Oil and Gas Co., Dallas, Tex.

M. B. Roy, Mobil Oil Corp., Oklahoma City, Okla.

D. N. Sawyer, ARCO Oil and Gas Co., Dallas, Tex.

A. T. Sayre, Jr., Union Oil Co. of Calif., Los Angeles, Calif.

A. M. Skov, Sohio Petroleum Co., San Francisco, Calif.

W. J. Sleeper, DeGoyler and MacNaughton, Dallas, Tex.

A. E. Smith (deceased), Consultant, Dallas, Tex.

A. S. Trube, Getty Oil Co., Houston, Tex.

V. V. Valleroy, Exxon Production Research Co., Houston, Tex.

W. R. Voss, Chevron USA Inc., San Francisco, Calif.