DATA INTERPRETATION
West Shelf of Australia in the Zola-1 exploration well. Tis represents one of the largest gas discoveries by the company. Zola- 1 is located in the WA-290-P exploration permit and is around 100 km from the Western Australian coast. Te discovery well Zola-1 and the subsequently drilled sidetrack appraisal well Zola-1/ST-1 have confirmed the existence of sandstone layers with 130m of net gas pay in an area south of the giant Gorgon gas field. New 3D seismic data will be acquired to further assess the potential of the discovery.
Sidetrack appraisal well Te sidetrack appraisal well to the original Zola-1 discovery well was drilled down to a total depth of 4713 m (true vertical depth). An extensive wireline measurement and pressure testing programme confirmed the presence of gas within several high quality sands of the target Triassic Mungaroo Formation. Te well and sidetrack were drilled in a water depth of 285 m and encountered 130 m of net gas pay. Both will be plugged and abandoned as per plan. In order to further assess the development
potential of Zola, OMV and its partners in WA-290-P, Apache (operator), Santos, Nippon Oil Exploration and Tap Oil, have agreed to acquire a new high resolution 3D seismic survey over the permit, which is likely to commence shortly. Jaap Huijskes, member of the OMV
executive board responsible for exploration and production (E&P), stated: “Zola-1 is one of OMV’s biggest gas discoveries and is the result of a successful and safely carried out exploration and appraisal drilling campaign. We are very proud of OMV’s exploration
activities in Australia, which have culminated in this significant discovery on the North West Shelf. Te next step will be to further appraise the gas discovery, including the acquisition of a new 3D seismic survey.” Beach Energy and its joint venture
partner San Leon Energy have commenced an 840 km2
3D seismic survey in the Durresi
Block, offshore Albania. San Leon is operator of the joint venture and, through a subsidiary, holds a 75 per cent interest in the Durresi block with Beach holding the remaining 25 per cent. Beach has agreed to pay 50 per cent of the seismic programme costs, rather than its 25 per cent working interest requirement, in exchange for an option which, if exercised after review of the seismic data, will give Beach a 50 per cent working interest in the licence moving forward. Petroleum Geo-Physical has been
contracted to carry out the survey using the Ramform Vanguard seismic vessel. Te 3D seismic programme will evaluate a number of prospective targets in the Durresi Block, including the A4-1X discovery, in preparation for drilling in 2012. Te A4-1X gas condensate field was
discovered in 1993 and is located 30 km off the southern coast of Albania. San Leon estimates the discovery to contain about 38m bbl of circa 51 API condensate and 150b ft3 of gas. Te joint venture is also exploring potentially significant oil and gas targets adjacent to A4-1X. Te Durresi block is situated on the
proven Apulian Margin, which extends from Italy into Albania. Southern Albania contains a highly prolific petroleum system, including one of the largest onshore oil accumulations in Europe, the Patos-Marinza field, which is
estimated to contain up to 5.7 billion barrels of original oil in place. Gazprom Neft has completed a 3D field
seismic survey at the Badra deposit in Iraq. Te Iraqi Oil Exploration Company (OEC), who Gazprom Neft contracted in November 2010, carried out the seismic survey. It was conducted over an area of 165 km2
. Te
processing and interpretation of the data received is scheduled for completion in November 2011.
Challenging profile Te Badra deposit is located in an area with a challenging profile, with a significant part of the field surface requiring the clearance of mines. During the preparation for the seismic profile, work was carried out to remove weapons over an area of approximately 12 000 km2
. Finally, ARKeX has begun a BlueQube
Marine gravity gradiometry survey in the Red Sea. Te survey for Saudi Aramco covers three blocks off the west coast of Saudi Arabia.
Te objective of the survey is to assist
oil and gas exploration by improving the definition of the top and flanks of salt bodies within the survey area (Fig. 1). Te BlueQube gravity gradiometry data will be used to enhance geological and velocity model building to improve 3D seismic imaging. Te contract was signed in conjunction with the Shoaibi Group, a leading Saudi Arabian oil and gas technology and service provider, who will be providing commercial assistance on the project. Surveying on the first block has already
commenced and all three blocks should be completed by the end of Q2 2011.
CGGVeritas breaks data transmission record C
GGVeritas has announced that its equipment subsidiary Sercel has
broken the seismic recording channel capacity barrier with the launch of the Giga Transverse. Te new Giga Transverse is offered as an add-on set of equipment to upgrade the channel capacity of the Sercel 428XL land seismic acquisition system. It is of particular benefit for SuperCrew high- channel-count surveys. According to the company, the
new Giga Transverse boasts the fastest transmission rate in the industry,
increasing the new optical transverse cable’s capacity from 10 000 to 100 000 channels in real time per line. With this outstanding quantitative step-change, Sercel says it is in a stronger position than ever to meet the challenges set by the ever increasing capacities of SuperCrews for whom crossing the one- million-channel milestone is no longer a dream but a fast-approaching reality. With the higher channel capacity, higher transmission rate and simplified deployment offered by the addition of the Giga Transverse, the performance of
the 400 series, which is the undisputed leader in land acquisition with a worldwide installed base of three million channels, is further enhanced. Sercel ceo Pascal Rouiller said:
“We are pleased to announce this breakthrough in land acquisition, which is particularly critical for the growing SuperCrew market for high- density wide-azimuth acquisition. With the addition of the Giga Transverse, the 428XL is truly the most flexible acquisition system in our industry.”
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