Accuracy of CSMGem Compared to Commercial Hydrate Programs

8 Accuracy of CSMGem Compared to Commercial Hydrate Programs 

A comparison of predictions from CSMGem, the program included in the CD of this work, with the second edition s version (CSMHYD) and three commercial hydrate prediction programs, is given here for all recent hydrate data reported in literature. The five programs (with the last three commercial) compared in this work are 

CSMGem—Colorado School of Mines (2007 edition) CSMHYD—Colorado School of Mines (1998 edition) DBRHydrate—DBRobinson Software Inc. (version 5.0) Multiflash—Infochem Computer Services Ltd. (version 3.0) PVTsim—Calsep A/S (version 11) 

The comparisons are broken into two categories for hydrate formation temperatures and pressures (1) uninhibited systems, and (2) thermodynamically inhibited systems. These comparisons show the accuracy that may be expected from readily available hydrate prediction programs. A detailed comparison of the accuracy of these programs is given by Ballard and Sloan (2004b). 

FIGURE 5.8 Incipient pressure accuracy (absolute) for uninhibited hydrate data for five programs. 

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