SEISMIC SURVEYING 


Te joint venture will provide land seismic acquisition services as well as interpretation and data processing in Russia, Kazakhstan, Uzbekistan, and Turkmenistan and their respective transition zone waters. WesternGeco will become a minority shareholder in the venture with a 25 per cent stake through the contribution of its land and transition zone seismic and data processing business in the aforementioned countries together with cash and access to certain proprietary Q technology and Omega data processing software. Day-to-day management of the venture is expected to be performed by Integra while key strategic and investment decisions will be made by the board of the joint venture with input from WesternGeco.


Processing power Te new company will benefit from the synergies created by combining the partners’ experience, technology, operational expertise and marketing skills. IG Seismic Services will continue to pursue the existing Integra strategy of undertaking land seismic projects outside the CIS and as part of the transaction the parties also agree to cooperate in such services in other areas. Te venture will operate a combined capacity of more than 40 seismic crews and nearly 900 CPUs of computer processing power with best- in-class software for data processing and interpretation.


the introduction of WesternGeco personnel and technology, the new venture will ensure efficient development of our joint seismic operations while the combination of our processing centers in Russia and Kazakhstan will substantially increase our data processing capabilities. We believe this move is in line with our strategy to increase our presence in businesses with higher added value and further improve our technology.” Seismic data processing company


Spectrum has completed the successful acquisition of long offset data for Bahamas Petroleum Company (BPC) in the southern blocks of Bahamas waters close to the border with Cuba, and seismic data processing is currently underway at its Houston data processing and imaging centre. Previous data in the area are from the


1980s, using FK demultiple and post stack migration technology. Modern acquisition and processing techniques are proving effective in providing significant improvement in the quality and resolution of the data. A combination of 2D surface related


multiple elimination (SRME) to attenuate water bottom related multiples and high- resolution radon demultiple to attenuate faster interbed multiples has been used. Tese techniques have been successful in minimising multiples in this dataset. Te data also benefited from specialist noise reduction using Spectrum’s proprietary NoiseRM process.


Fig. 2. Permo-Carboniferous plays in the Lodestone survey area.


velocity analysis was run on this migrated data to provide a final stacking velocity. In a separate development Spectrum ASB, the Australian subsidiary of Spectrum, has released a new large-scale 3D multi-client seismic merge dataset. Tis amalgamation of key surveys encompasses 30 000 km2


of the


Carnarvon Basin off the west and northwest coast of Western Australia (also known as the NW Shelf ). Tis area is considered Australia’s premier hydrocarbon province. Most hydrocarbons found in the basin


are sourced from Upper Jurassic Dingo Claystone. In the outboard Rankin Platform, giant gas accumulations as well as oil and gas accumulations along the inboard eastern Gipsy-Rose-Lee Trend are sourced from a delta-based Triassic to Middle Jurassic sequence. Te oil reservoir is primarily in the Windalia Sandstone Member of the Muderong Shale and the Lower Cretaceous Barrow Group which has excellent reservoir characteristics. Late Cretaceous and middle Miocene faulted anticlines provide structural traps. A wide range of play types is found within this basin, including rollover anticlines and fault blocks associated with antithetic faults, stratigraphic traps, pinchouts and onlap plays. Spectrum ASB’s 3D dataset will provide


a valuable tool for pursuing these multiple play types and for those companies interested in participating in the current Australian hydrocarbon bid rounds. Spectrum’s newly merged data covers several open blocks included in the 2010 / 2011 bid round. Te 3D merge encompasses 30 surveys


in total, all balanced and phase matched by Spectrum ASB’s experienced geophysicists. According to the company, the results of this undertaking give an excellent high resolution overview of the Carnarvon Basin.


Commenting on the transaction, Antonio Campo, Integra’s chief executive officer said: “We are very excited about expanding our capabilities by joining forces with WesternGeco. Te agreement will boost the service range and expand the market presence of our core seismic segment. With


9 IHSS


Previous data in this area used only post stack migration, but for the new data two passes of Kirchhoff pre stack time migration have been used: Te first pass to produce a migration velocity field with analysis every kilometre, and the second pass to finally migrate the data more accurately. Subsequently, a final


2D long-offset seismic In Western Australia, Searcher Seismic’s Vampire 2D survey will acquire circa 8000 km of 2D long-offset seismic in the prolific Browse Basin. Te layout has been designed with extensive input from industry with respect to line orientation and well- tie selection. Te survey will provide an invaluable tool for understanding the regional structural and stratigraphic framework of the Browse Basin. Te survey has secured pre-commitment


and is scheduled to commence shortly using the Seabird vessel, Aquila Explorer. Te Aquila utilises high-end Sercel Sentinel Solid Streamer technology and Bolt Source


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21