The Granite Point Field, Cook Inlet, Alaska
The Granite Point field was discovered by the Pan American Tyonek State 18742-1 well in July of 1965. The well encountered more than 300 ft (91 m) of net pay in the Tyonek Formation between 8000 and 9000 ft (2438 to 2743 m) TVD. The well produced 2455 BOPD from 40 ft (12 m) of perforations within this interval on a drill stem test. Appraisal drilling proceeded over the following 14 months, confirming the downdip extent of the field and testing oil from the Hemlock Formation. Shallow gas has been detected in the Beluga Formation and produced from the Tyonek at less than 1000 MCFGPD for use in providing fuel to the field facilities. Original oil in place is estimated to be 730 MMBO. Field development begain with the setting of three oil production platforms by early 1967. Production peaked at close to 53,000 BOPD then began a rapid decline until a continuous water injection program was instituted. Since that time, the field has been on roughly a 10% decline, having produced more than 145 MMBO with a current rate of mroe than 2000 BOPD.
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Oil and Gas Fields of the Cook Inlet Basin, Alaska
This volume is designed to showcase the geo-technical elements of oil and gas fields of the Cook Inlet Basin of southcentral Alaska. It contains 10 chapters written by 16 authors and co-authors who have extensive experience in the basin. All of the papers have been peer-reviewed. The first three chapters provide an introduction to exploration, stratigraphy, petroleum systems, seismic acquisition, and reservoirs of the basin. Following these are seven chapters that describe individual fields in detail. This volume is intended to serve as a key reference to the petroleum geology of the Cook Inlet Basin for a wide audience including oil and gas explorers, technical professionals, students and those seeking more information about the origin and habitat of oil and gas in the area.