SPE MICROCOMPUTER USERS GROUP DISK # 10

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         SPE  MICROCOMPUTER USERS GROUP  DISK # 10

                              PC/MS-DOS 1.1

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NOTICE  TO  USERS:  Neither the contributor nor the Society of Petroleum

Engineers  makes any express or implied warranty of any kind with regard

to  these program materials, including, but not limited to warranties of

of  merchantability  and  fitness  for a particular purpose. Neither the

contributor  nor the SPE shall be liable for incidental or consequential

damages  in  connection  with  or  arising out of the furnishing, use or

performance of these program materials.

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l.  AAREADME.010   The file you are reading

2.  PRESSURE.BAS   BASIC program in ASCII listable form.

                   NOTE: THIS FILE TAKES ALMOST 1/2 MINUTE TO LOAD INTO

                   BASICA.  YOU CAN SPEED UP LOADING BY CREATING A NON-

                   ASCII FILE ON YOUR WORK DISK: SAVE "PRESS2

3.  PCONS.DAT      Data file of physical constants used by PRESSURE.BAS

3.  GAS.DAT        Data file of fluid analysis submitted as a sample

                   input.

             TIM FRANKLIN WINNER OF STUDENT PROGRAM CONTEST

                                May 1985

Tim  Franklin,  a  senior  petroleum engineering major at Louisiana Tech

University,  Ruston,  La.,  has  been  selected  as  the  winner  of the

MICROCOMP   NEWS   student   program  contest.  His  program  is  titled

"PRESSURE.BAS".  The basic program calculates static or flowing BHP, and

static  or  flowing  well  head  pressure  for  a gas well. The program,

developed  under  IBM  BASICA  interpreter and PC DOS 2.0, is completely

menu driven.

Tim  will be receiving a BS Degree in May. He has worked for Conoco as a

student  engineer  during the summers of 83 and 84. In June he will join

the  Systems Engineering Group of Conoco Production Engineering Services

Division   in   Houston.   At  the  present  time  he  is  a  part  time

programmer/researcher  for  Science  Research  Systems,  Inc. in Ruston.

Franklin  has been a student member of SPE since 1982 and is Chairman of

the student chapter microcomputer users group.

Pressures  are  calculated  using  the  Cullender  and Smith method. See

Trans.  AIME,  Vol. 207, 1956: "Practical Solution of Gas Flow Equations

for  Wells  and  Pipelines with Large Temperature Gradients". Fluid data

may  be either a well fluid analysis, fluid mixture components and their

mole  fraction,  or  the  specific  gravity of the fluid. Pseudocritical

constants,   specific   gravity,   and  apparent  molecular  weight  are

calculated  utilizing  a  data  file,  PCONS.DAT. This file contains the

compound name, molecular weight, specific gravity, critical temperature,

and  critical  pressure  for  67  compounds. The data was extracted from

Table  A-1,  Appendix  1,  of  "The  Properties of Petroleum Fluids", by

McCain with the addition of hexanes+ and heptanes+.

The  user  is  given  the  option  of  correcting  critical pressure and

temperature  for  the presence of hydrogen sulfide, nitrogen, and carbon

dioxide  in the fluid by either the Wichert and Aziz method or the Carr,

Kobayashi,  and Burrows method. See Carr, Kobayashi, Burrows, "Viscosity

of Hydrocarbon Gases Under Preessure," Trans. AIME, Vol. 201, 1954.

If the specific gravity of the well fluid is given as input, the program

calculates   the   pseudocritical   constants  using  the  Brown,  Katz,

Obverfell,  and  Alden  correlation.  See  Brown, Katz, Oberfell, Alden,

"Natural Gasoline Volitile Hydrocarbons," NGAA, Tulsa, Ok., 1948.

This  disk  comes with printed documentation that contains a description

of the program and its methodology, sample input, and sample output.

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