Lessons learned from Production Logging Interpretation of a well in a Gas Condensate Reservoir

This paper compares Production Logging Tool (PLT) interpretations with LGR Test Measurements and other observations in the field in order to obtain the water production rate and water entry points in a well of a Gas Condensate Reservoir to validate the PLT tool and explain existing production problems and to subsequently optimize reservoir management for a gas field in South of Iran. In this field associated saline water production is an important issue in production resulting in a substantial productivity impairment of gas wells. In this field 33 wells have been producing 1450 MMScf/day gas to meet field deliverability requirement. Out of these 33 wells, 12 wells deal with saline water production associated with gas which gas production rate is limited to saline water production. Although the tool was run in two stages to detect the water entry points but the tool did not detect the water entry points and no water production from intervals was observed. Although the water production rate was 250 STB/Day using test separator but the tool detects no water production and water entry production intervals showing the poor performance of the tool in the well. In order to validate the tool performance it is highly recommended to measure gas, condensate and water production rate using test separator.