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THPRES Keyword update - #783

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gdfldm:thpres-update
Oct 6, 2026
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gdfldm merged 2 commits into
OPM:mainfrom
gdfldm:thpres-update

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@gdfldm gdfldm commented Sep 10, 2026

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Update description after support added for EQLOPTS IRREVERS

<text:p text:style-name="_40_TextBody">The <text:a xlink:href="#__RefHeading___Toc210168_2884651453">THPRES</text:a> defines the threshold pressure between various equilibration regions that have been defined by the <text:a xlink:href="#__RefHeading___Toc73734_2752266063">EQLNUM</text:a> keyword in the <text:a xlink:href="#__RefHeading___Toc40648_784232322">REGIONS</text:a> 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. </text:p>
<text:p text:style-name="_40_TextBody">This option must be activated by <text:a xlink:href="#__RefHeading___Toc210168_2884651453">THPRES</text:a> variable on <text:a xlink:href="#__RefHeading___Toc131554_398689501">EQLOPTS</text:a> keyword in the <text:a xlink:href="#__RefHeading___Toc55591_1778172979">RUNSPEC</text:a> section in order to utilize this feature. Note that the irreversible option, as defined by IRREVER variable on <text:a xlink:href="#__RefHeading___Toc131554_398689501">EQLOPTS</text:a> keyword in the <text:a xlink:href="#__RefHeading___Toc55591_1778172979">RUNSPEC</text:a> section, is not supported.</text:p>
<text:p text:style-name="_40_TextBody">The <text:a xlink:href="#__RefHeading___Toc210168_2884651453">THPRES</text:a> keyword defines the threshold pressure between pairs of equilibration regions that have been defined by the <text:a xlink:href="#__RefHeading___Toc73734_2752266063">EQLNUM</text:a> keyword in the <text:a xlink:href="#__RefHeading___Toc40648_784232322">REGIONS</text:a> 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. </text:p>
<text:p text:style-name="_40_TextBody">The <text:span text:style-name="NotKeyword">THPRES</text:span> option must be activated on the <text:a xlink:href="#__RefHeading___Toc131554_398689501">EQLOPTS</text:a> keyword in the <text:a xlink:href="#__RefHeading___Toc55591_1778172979">RUNSPEC</text:a> section in order to use this feature. The irreversible option may be activated by the IRREVERS variable on the <text:a xlink:href="#__RefHeading___Toc131554_398689501">EQLOPTS</text:a> keyword.</text:p>

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The last sentence seems unclear to me. "The irreversible option" can refer to many things until the keyword IRREVERS gives us a hint. This paragraph also does not say whether IRREVERS is a sub-option for THPRES or an alternative to it.

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I have updated the sentence.

@gdfldm
gdfldm merged commit b09f89f into OPM:main Oct 6, 2026
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gdfldm deleted the thpres-update branch October 6, 2026 16:01
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