ESTS0406 HYFRACP3D.

1. NAME OR DESIGNATION OF PROGRAM:  HYFRACP3D.

3. DESCRIPTION OF PROGRAM OR FUNCTION

HYFRACP3D is a finite element program for simulation of pseudo three-dimensional fracture geometries with a two-dimensional planar solution. The model predicts the height, width and winglength over time for a hydraulic  fracture propagating in a three-layered system of rocks with variable rock mechanics properties.

4. METHOD OF SOLUTION

The program uses the finite element of solution. The model employs a numerical approach to solve the coupled non-linear partial differential equations for the fracture fluid pressure and induced fracture dimensions. The fracture is discretized into a number of vertical sections. Fracture width and pressure evaluations are conducted by applying to each vertical crack,the two-dimensional flow in the vertical direction with leak-off.

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Graphics output is not available and program is limited to fracture propagation in a single plane without proppant transport. For PC use, the input is either typed onto the screen in program format if output is sent to  a file, or output is printed to screen if input is read from a file.

6. TYPICAL RUNNING TIME:  Approximate execution time is 5 CPU minutes.

In the tests performed at the NEA/DB, only a few seconds are required to execute the sample problem on a PC DELL Pentium processor of 99 MHz.

7. UNUSUAL FEATURES OF THE PROGRAM

The program simulates the propagation of a three-dimensional hydraulic fracture due to constant injection rates. The program is capable of simulating the influences of variations in three rock layers, in situ stresses, mechanical properties and thicknesses.

8. RELATED AND AUXILIARY PROGRAMS:

10. REFERENCES

- S.H. Advani et al.:
  Development of a Generalized Hydraulic Fracture Model
  May 1985

- HYFRACP3D User's Guide

11. MACHINE REQUIREMENTS:  IBM compatible PC, 156456 bytes free disk space.

The program HYFRACP3D was installed compiled and executed on PC DELL Optiplex GXM 5100, with a Pentium processor of 99 MHz, base memory 640 Kbyte and extended memory 16 MByte. The filesizes of the executables created with the Lahey compiler system  F77L/EM-32 (including the -stubloader option at linking time) and with the MicroSoft FORTRAN compiler are 292 and 76 Kbyte respectively.

13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:  DOS.

The program HYFRACP3D was installed compiled/linked and its executed in a PC-DELL Pentium processor of 99 MHz, under MS-DOS  6.2 ; the source file was compiled and linked using:
- The MicroSoft FORTRAN compiler (Version 5.1) and linker
  (Version 5.15)
- The Lahey F77L/EM-32 compiler (Version 5.20) and linker
  (Version 5.1L)

14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

File
extensions of "FOR" refer to FORTRAN source code. File extensions of "INP" refer to FORTRAN source code data input files. File extensions of "OUT" refer to FORTRAN source code data output files.

15. NAME AND ESTABLISHMENT OF AUTHORS

     S.H. Advani, J.K. Lee, H. Khattab
     Dept. of Eng. Mechanics,
     Ohio State University Res. Foundation,
     Columbus, OH (United States)

File name	File description	Records
ESTS0406_01.001	Information file of program HYFRACP3D	116
ESTS0406_01.002	Source file of program HYFRACP3D	1512
ESTS0406_01.003	Lahey executable of program HYFRACP3D	0
ESTS0406_01.004	MicroSoft executable of program HYFRACP3D	0
ESTS0406_01.005	Sample input file (test case)	5
ESTS0406_01.006	Sample output file (original)	400
ESTS0406_01.007	Sample output file ("Lahey executable")	397
ESTS0406_01.008	Sample output file ("MicroSoft executable")	408
ESTS0406_01.009	Auxiliary file of Lahey runtime errors/mess.	0
ESTS0406_01.010	DOS file-names	9