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Overcoming Drilling Risks and Uncertainties in Biogenic Gas Field Development: Case Study from XYZ Field, Indonesia
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 80th EAGE Conference and Exhibition 2018, Jun 2018, Volume 2018, p.1 - 5
Abstract
Biogenic gas reservoir is widely known as drilling hazard rather than producing horizon even though significant amount of gas is trapped within the reservoir. As the global demand of gas constantly increasing, biogenic gas has become an economic target to be developed. The accumulation of biogenic gas is easily characterized by their bright seismic amplitude in shallow area, giving them the title of shallow biogenic gas. The anomaly, may be similar to the one exhibited by coal layer, the use of pre-stack seismic data has proven useful to minimize the uncertainties of both anomalies. One of the issues of biogenic gas reservoir encountered in the area is the reservoir is commonly loose and unconsolidated which may promotes cavities during the drilling phase that may delays the installation of casing and cement which in turn may cause formation kick or blowout to occur. To diminish the problem, proper sand control during the drilling phase is needed. Our methods which cover the exploration, drilling, and production phases have proven useful to bring a success story in shallow biogenic gas development by increasing and maintaining their production as well as reserve to be produced.