diff --git a/parts/chapters/subsections/10.3/THPRES.fodt b/parts/chapters/subsections/10.3/THPRES.fodt index c66ad9b3e..7338173bd 100644 --- a/parts/chapters/subsections/10.3/THPRES.fodt +++ b/parts/chapters/subsections/10.3/THPRES.fodt @@ -4290,8 +4290,8 @@ Updated with AFR/TSA Rev-D comments and new keywords. Description - The THPRES defines the threshold pressure between various equilibration regions that have been defined by the EQLNUM keyword in the REGIONS section. The threshold pressure defines the potential difference between two regions which must be exceeded before flow can occur between the two regions. Once flow occurs the potential between the two regions is reduced by the threshold pressure. - This option must be activated by THPRES variable on EQLOPTS keyword in the RUNSPEC section in order to utilize this feature. Note that the irreversible option, as defined by IRREVER variable on EQLOPTS keyword in the RUNSPEC section, is not supported. + The THPRES keyword defines the threshold pressure between pairs of equilibration regions that have been defined by the EQLNUM keyword in the REGIONS section. The threshold pressure defines the potential difference between two regions which must be exceeded before flow can occur between the two regions. Once flow occurs the potential between the two regions is reduced by the threshold pressure. + The THPRES option must be activated on the EQLOPTS keyword in the RUNSPEC section in order to use this feature. The irreversible option may be activated by the IRREVERS variable on the EQLOPTS keyword. @@ -4333,10 +4333,10 @@ Updated with AFR/TSA Rev-D comments and new keywords.1 - EQLNUM1 + EQLNUM1 - EQLNUM1 is an a positive integer that is greater or equal to one and less than or equal to NTEQUL on the EQLDIMS keyword in the RUNSPEC section, that defines the “from” equilibration region number. + EQLNUM1 is a positive integer less than or equal to NTEQUL on the EQLDIMS keyword in the RUNSPEC section, that defines the “from” equilibration region number. @@ -4363,10 +4363,10 @@ Updated with AFR/TSA Rev-D comments and new keywords.2 - EQLNUM2 + EQLNUM2 - EQLNUM1 is an a positive integer that is greater or equal to one and less than or equal to NTEQUL on the EQLDIMS keyword in the RUNSPEC section, that defines the “to” equilibration region number. + EQLNUM1 is a positive integer less than or equal to NTEQUL on the EQLDIMS keyword in the RUNSPEC section, that defines the “to” equilibration region number. @@ -4393,12 +4393,13 @@ Updated with AFR/TSA Rev-D comments and new keywords.3 - THPRES + THPRES - THPRES defines the threshold pressure from EQLNUM1 to EQLNUM2 and from EQLNUM2 to EQLNUM1. - The default value of 1* sets the threshold pressure to a value that initially prevents flow between the two equilibration regions. Any subsequent production or injection in either of the two equilibration regions will therefore result in flow between the two regions. Thus, this default initially isolates the two equilibration regions. - If a equilibration region number pair has not been explicitly defined by this keyword the THPRES is set to zero, for no threshold pressure. + THPRES defines the threshold pressure between EQLNUM1 and EQLNUM2. + However, if the irreversible option is activated then the threshold pressure is only applied to flow from EQLNUM1 to EQLNUM2, and the threshold pressure for flow from EQLNUM2 to EQLNUM1 may be defined on a separate keyword. + The default value of 1* sets the threshold pressure to a value that initially prevents flow between the two equilibration regions. Any subsequent production or injection in either of the two equilibration regions will therefore result in flow between the two regions. Thus, this default initially isolates the two equilibration regions. + If a equilibration region number pair has not been explicitly defined by this keyword the threshold pressure is set to zero. @@ -4438,7 +4439,7 @@ Updated with AFR/TSA Rev-D comments and new keywords. Table 10.60: THPRES Keyword Description - See also the MULTREGT keyword in the GRID section that uses the transmissibility between the MULTNUM, FLUXNUM or OPERNUM region arrays to control the flow between various regions within the model. + See also the MULTREGT keyword in the GRID section that multiplies the transmissibility between MULTNUM, FLUXNUM or OPERNUM regions and can be used to control the flow between various regions within the model. @@ -4452,33 +4453,31 @@ Updated with AFR/TSA Rev-D comments and new keywords. Examples - Given NTEQUL is equal to six on the EQLDIMS keyword in the RUNSPEC section, - -- - -- EQLNUM EQLNUM THPRES - -- FROM TO VALUE - THPRES - 1 2 0.588031 / REGN 1 TO REGN 2 - 2 1 0.588031 / REGN 2 TO REGN 1 - 1 3 0.787619 / REGN 1 TO REGN 3 - 3 1 0.787619 / REGN 3 TO REGN 1 - 1 4 7.000830 / REGN 1 TO REGN 4 - 4 1 7.000830 / REGN 4 TO REGN 1 - / - - The above example defines the threshold pressures between equilibration regions one and two, one and three and one and four. As the threshold pressures between regions one and five and one and six (as well as other combinations), have not been explicitly set in the example, the threshold pressures for these combinations are set to zero. - However, as the irreversible option, as defined by IRREVER variable on EQLOPTS keyword in the RUNSPEC section, is not supported, then example can be simplified to: - -- - -- EQLNUM EQLNUM THPRES - -- FROM TO VALUE - THPRES - 1 2 0.588031 / REGN 1 AND REGN 2 - 1 3 0.787619 / REGN 1 AND REGN 3 - 1 4 7.000830 / REGN 1 AND REGN 4 - / - - Again, as the threshold pressures between regions one and five and one and six (as well as other combinations), have not been explicitly set in the example, the threshold pressures for these combinations are set to zero. - - + Given NTEQUL is equal to six on the EQLDIMS keyword in the RUNSPEC section, and the THPRES and IRREVERS options have been activated on the EQLOPTS keyword in the RUNSPEC section. + -- + -- EQLNUM EQLNUM THPRES + -- FROM TO VALUE + THPRES + 1 2 0.588031 / REGN 1 TO REGN 2 + 2 1 0.588031 / REGN 2 TO REGN 1 + 1 3 0.787619 / REGN 1 TO REGN 3 + 3 1 0.787619 / REGN 3 TO REGN 1 + 1 4 7.000830 / REGN 1 TO REGN 4 + 4 1 7.000830 / REGN 4 TO REGN 1 + / + + The above example defines the threshold pressures between equilibration regions one and two, one and three, and one and four. As the threshold pressures between regions one and five, one and six, and other combinations have not been explicitly set in the example, the threshold pressures for these combinations are defaulted to zero. + If the IRREVERS option has not been activated on the EQLOPTS keyword in the RUNSPEC section then example can be simplified to: + -- + -- EQLNUM EQLNUM THPRES + -- FROM TO VALUE + THPRES + 1 2 0.588031 / REGN 1 AND REGN 2 + 1 3 0.787619 / REGN 1 AND REGN 3 + 1 4 7.000830 / REGN 1 AND REGN 4 + / + + Again, as the threshold pressures between regions one and five, one and six, and other combinations have not been explicitly set in the example, the threshold pressures for these combinations are defaulted to zero.