Talisman Energy Inc. was a Canadian multinational oil and gas exploration and production company headquartered in Calgary, Alberta. It was one of Canada's largest independent oil and gas companies. Originally formed from the Canadian assets of BP Canada Ltd. it grew and operated globally, with operations in Canada (B.C., Alberta, Ontario, Saskatchewan, Quebec) and the United States of America (Pennsylvania, New York, Texas ) in North America; Colombia, South America; Algeria in North Africa; United Kingdom and Norway in Europe; Indonesia, Malaysia, Vietnam, Papua New Guinea, East Timor and Australia in the Far East; and Kurdistan in the Middle East. Talisman Energy has also built the offshore Beatrice Wind Farm in the North Sea off the coast of Scotland.The company was acquired by Repsol in 2015 and in January 2016 was renamed to Repsol Oil & Gas Canada Inc.The company initially grew quickly through a number of mergers and acquisitions, which reflects in the complex history and large diversity of holdings. In the 2015 Forbes Global 2000, Talisman Energy was ranked as the 1728th -largest public company in the world. Talisman was the first Canadian company to join the Voluntary Principles on Security and Human Rights Plenary Group (Voluntary Principles on Security and Human Rights) and is a participant in the United Nations Global Compact...
Both surface and interbed-generated multiples are an integral part of surface seismic datasets, and several techniques are used to identify and remove them. Unfortunately, there is not a single technique that can accurately identify and remove every multiple in a dataset, so interpreters often work with datasets that contain several multiples. A vertical seismic profile (VSP) has a unique geometry in that the receivers are in the subsurface and can, therefore, record both a down-going and up-going wave field. The down-going wave field is used for deterministic deconvolution and can successfully identify and remove all multiples. The resultant corridor stack is multiple free and can then be compared to the surface seismic. Several techniques can then be used to identify any residual multiples in the surface seismic data, including information about the origin. This paper presents a case study to identify multiples in the surface seismic data of a field in the Asia Pacific region. The paper will show how the VSP data is processed to produce a corridor stack that is multiple free, a corridor stack that contains both primaries and multiples, and a stack that contains only multiples. These are then merged with the surface seismic data to accurately identify any residual multiples. The residual multiples can then be removed through further processing
