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The cables are attached to a dynamically positioned recordng in seismic monitoring of reservoirs.
Summary Reprocessing of 2D regional lines The speculative 2D data set was reprocessed with a focus Entering a new basin such as West Greenland's Baffin Bay We present some of the geological and geophysical challenges we have faced operating Maersk Oil's first block in the Arctic - the 12,000 km 2 Block 9 in Baffin Bay, West Greenland. We will cover reprocessing of regional 2D lines, planning of a 1800 km 2 seismic survey in arctic waters and the execution of this 3D survey with acquisition and processing lined up to have interpretable cubes three weeks after last shot, and how the field observations were used to design and optimize the full onshore processing flow. Introduction A regional sparse 2D grid of 7x15 km speculative data was available for the 2010 Baffin Bay license round work. Based on this regional analysis, the key challenges faced in in the area in unraveling the complex structural geology and deep water reservoir architecture are imaging beneath a rugose seabed, a high velocity Quaternary cover and potential presence of basalts with unclear extent and thickness. In December 2010 Maersk Oil became operator of Baffin Bay, Block 9 (Figure 1) and soon after a 3.5x7 km grid of Blue area is 2D seismic speculative data became available.
There has been a resurgence of interest lately and can be located with accuracy; moreover, Because of the effects of noise and varying in the use of repeated seismic surveys as because the shooting vessel is acquisition and processing differences a reservoir-description and productionmonitoring unencumbered by recording equipment, it between surveys, the literature about 4D tool. Although studies of is highly maneuverable and can position seismic commonly reports use of a matching repeated seismic surveys for mapping the source locations independently from filter to account for systematic differences steam fronts go back more than 10 years, the receivers. To avoid affecting the 4D recent advances have extended time-lapse The two OBC surveys were carried out 4 analysis, such filters are derived from data or four-dimensional (4D) seismic to map months apart. The survey area contained no zones not expected to change with time gas/oil and oil/water contacts with significant known hydrocarbon production or other between surveys. Recent studies have mechanism for changing the seismic was derived over a 1,500-millisecond window made good use of legacy three-dimensional response.
Shallow data, having a Often no dip direction is dominant in technology is progressing lower fold than deeper data, tend to have the whole survey area. These layers are oriented in some main be towed by modern seismic vessels has geometry effects on amplitude are undesirable direction, the fault planes and corresponding increased very rapidly, and the variety of for lithology and pore-fill prediction diffraction patterns might be oriented stationary-receiver (seabed) systems is and for reliable structural interpretation. As a result, several quite Therefore, it is important to choose an relevance of the dip/strike decision is different techniques are available for 3D acquisition technique and a geometry that reduced. A to the offset distribution as a function of easy. Whereas, when shooting along the great deal of similarity exists in twodimensional common midpoint (CMP) position.