We wish to express our appreciation to The Society of Petroleum Engineers, Richardson, Texas 75080, for their assistance, helpful suggestions and for granting approval for the use of copyrighted material from The Reservoir Engineering Aspects of Waterflooding, Monograph Volume 3 , Henry L. Doherty Series by F.F. Craig, Jr. in the development of this project.

For readers requiring additional information , we suggest the following technical SPE papers available from the SPE eLibrary.

1. Benton , Jerry P., Smith , Robert L. and Maslanka ,Paul M. : Early Implementation of A Full Scale Waterflood In The ABO Reef , Terry County , Texas – A Case History,  SPE paper 9720 presented at the 1981 Permian Basin Oil & Gas Recovery Symposium of the SPE of AIME, Midland, Texas , March 12-13,1981.

2. Lu , Guo Fan, Jagoe, B.K. and Wu, C.H. : Technical Factors Useful for Screening Carbonate Reservoirs for Waterflood Infill Drilling , SPE paper 27660 presented at the 1994 SPE Permian Basin Oil and Gas Recovery Conference held in Midland , Texas , March 16-17 , 1994.

3. Gulick, Karl E. , McCain , Jr. , William D. , S.A. Holditch & Associates ,Inc.: Waterflooding  Heterogeneous Reservoirs , SPE paper 40044 presented  at  the 1998 International  Petroleum  Conference & Exhibition of Mexico , Villahermosa , Mexico March 3-5 , 1998.

4. Baker, Richard, : Reservoir Management for Waterfloods – Part II , The Journal of Canadian Petroleum Technology , January , 1998 , Volume 37 , No. 1.

5. Cobb, W. M. and  Marek, F.J., William M. Cobb & Associates , Inc. : Net Pay Determination for Primary and Waterflood Depletion Mechanisms , SPE paper 48952 presented at the 1998 SPE Annual Technical Conference and Exhibition held in New Orleans , La , September 27-30 , 1998.

6. Macary, Sameh , Egyptian Petroleum Research Institute and Hamid , Walid A.-KOC : Creation of the Fractional Flow Curve from Purely Production Data : SPE paper 56830-MS presented at the SPE Annual Technical Conference and Exhibition , Houston , Texas, October 3-6 , 1999.

7. Cremonini, Andres S. , Instituto Technologico de Buenos Aires ( ITBA) : Analytical Method to Estimate Waterflood Performance , SPE paper    presented at the 1998 SPE Annual Technical Conference and Exhibition held in New Orleans , La. , September 27-30 , 1998.

8. Molina , Nelson N. , Intercomp Resource Development and Engineering , Inc. : A Systematic Approach To The Relative Permeability Problem in Reservoir Simulation , SPE paper  9234 presented at 55^th Annual Fall Technical Conference and Exhibition of the SPE held in Dallas , Tx , September 21 – 24 , 1980.

9. Honarpour , M. and Mahmood , S.M. , National Institute for Petroleum & Energy Research : Relative Permeability Measurements : An Overview , SPE paper 18565 – PA  , published in the Journal of Petrolem Technology, Pages 963 – 966 in the August Issue , 1988. 

10. Saavedra , N.F. , Ecopetrol, Peralta , R. C. , DTH LTDA and Cobb , W . , William M. Cobb & Associates , Inc. : Distribution of Injected Water Using CGM Method : A Case History in Palogrande – Cebu Field , SPE paper 81042 presented at the SPE Latin American and Caribbean Petroleum Engineering Conference held in Port-of-Spain , Trinidad , West Indies on April 27-30 , 2003.

11. Craig , Forrest F. , Jr. , : The Reservoir Engineering Aspects of Waterflooding , SPE Mongraph Volume 3 , Henry L. Doherty Series . Pages 36 , 78 – 95 and 115 – 124 .  Richardson , Texas : Society of Petroleum Engineers.  Third Printing in November , 1980 .  Copyright by the Society of Petroleum Engineers of AIME , Richardson , Texas.