Development Strategy of Gas Compression System in Mature Field

• Main Author: ZAENAL ABIDIN (NIM: 23015013), ALI
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/20966
• Institution: Institut Teknologi Bandung

In the face of the oil price crisis, oil and gas field operators are required to find ways to maitani or improve their production. In mature fields, the rate of decline in production and reservoir pressure is one of many challenges in maintaining field economics. Besides drilling new wells, several ways proven to maintain or even increase production in the mature field. <br /> <br /> <br /> In the Asgard and Gullfaks field operated by Statoil in offshore Norwegia, subsea compression technology used to improve the decline of production. Claims obtained for the Asgard and Gullfaks field are 306 and 22 MMBOEPD increment in gas reserves respectively (Vinterstø et al., 2016). <br /> <br /> <br /> In the Sajaa field, operated by SNOC in onshore Sharjah, wellhead compressor technology used to increase production and revive some shut in wells due to liquid <br /> <br /> <br /> loading. The increment in production varies depending on the characteristics of the well, with the highest increment at 3 MMSCFD (Jain et al., 2015). <br /> <br /> <br /> In addition to the use of technologies such as wellhead and subsea compressors, on offshore marginal fields could utilize topside facility modifications such as <br /> <br /> <br /> decreasing separator-operating pressure, changes in pipe flow direction and modification of installed gas compression systems. In XYZ field, topside facility <br /> <br /> <br /> modification will studied technically in several case studies. There are three centrifugal compressors arranged in series that serve to deliver the gas produced on the EF platform to the GH platform for further processing. <br /> <br /> <br /> Of the four case studies that technically analyzed, case study 3 chosen as the most likely to implemented. Case study 3 can accommodate the gas production decline <br /> <br /> <br /> from 22 MMSCFD to 16 MMSCFD at low landing pressure (70 psig), does not need heat exchanger replacement, does not need anti-surge valve replacement, smallest space needed and smallest additional load, which are 8 x 3 meter2 and 10.400 kgs respectively to the EF platform compared to other case studies.