VIRTUAL PRESSURE GAUGE WITH THORNHILL-CRAVER FORMULA TO DETERMINE FLOWING TUBING PRESSURE IN GAS LIFTED WELL

• Main Author: SRI BASUNDORO, ARUNO
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/21266
• Institution: Institut Teknologi Bandung

The limitation in gathering tubing pressure data creates obstacles and challenges to production engineer to select correlation of production well. Practically, the pressure data could be obtained by running static gradient survey or flowing gradient survey, but these activities required addditional budget and cause well downtime and in several cases could lead to well lost. These reasons guide management to avoid lost in oil and gas production and decided not to perform static gradient survey nor flowing gradient survey. <br /> <br /> <br /> <br /> <br /> <br /> Thornhill-Craver equation is used in this study to predict pressure in tubing string of gas lifted well or named as virtual pressure gauge. Collected pressure data on the gas lift mandrel downstream is used as parameter to select correlation to create outflow curve of the well production. <br /> <br /> <br /> <br /> <br /> <br /> The study was conducted on Z field which is managed by PT. CP Indonesia. In BB-11ST1 well, the result of virtual pressure gauge methode is compared to the actual priduction data in test separator. In BB-20 well, the result is compared to the flowing gradient survey which has been approved by management. The obtained analysis determines whether the virtual pressure gauge method is capable of providing an alternative to oil production engineers and provides restrictions on the use of the method <br />