Wellbore Gas Lift Valves

for gas lift wells, valve information is important to accurately compute gas lift performance, optimization, and bottomhole pressure in the absence of gas lift valve data, injection will be assumed at the lowest point in the well with adequate delta pressure from injection to production to support gas passage in the presence of gas lift valve data, the preferred method is to calculate downhole opening and closing pressures based off of the r ratio and test rack opening pressure if those values are missing, the designed surface opening and closing pressures are used to determine which valves are open, which is less accurate different valve types have different data requirements and assumptions in the schema to prevent the need for valve types from being required in the input schema pressure operated valves the most thorough calculation is performed with test rack opening pressure and r are provided alongside a positive port size nominal valve size will increase accuracy, but 1 5" is assumed when the provided value is null when test rack opening pressure and r are not provided, simplified calculations are performed based on input surface closing and opening pressures, which have an inherent assumption about surface pressures under designed conditions dummy valves the system will infer a dummy valve when port size, surface opening, and surface closing pressures are all 0 orifice valves the system will infer orifice valves with port size is > 0 and surface opening and closing pressures are 0 false true 0,0,85,88,76false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type false unhandled content type