Full coverage layout method of complex template for offshore streamer observation system

Abstract

The invention relates to a full-coverage laying method for a complex template for full-coverage design of offshore towrope exploration of oil exploration. The method comprises the following steps: rotating a lane to a simple zero-degree coordinate system to establish a lane coordinate system for horizontal courses; establishing a template coordinate system in a Cartesian rectangular coordinate system for the template; rolling the template horizontally along the x negative axis from the right to left; calculating various active CMP rectangles in the template; calculating the max rolling times through the min longitudinal full-coverage rectangle width and the active CMP rectangles of the template; rotating the template by 180 degree by taking the target point of the template coordinate system as a start point; translating the template to the upper end of the lane according to the original position of the target point in the lane coordinate system and the offset of a coordinate figure before rotating to obtain the original positions of all shots; rotating the shot set to a practical course coordinate system to obtain a full-coverage observing system. Through the adoption of the full-coverage laying method, the requirements of multiple-voyage wide-orientation exploration are met. The full-coverage laying method is applicable to various complex templates and is conductive to achieving a wide-orientation exploration technology.

Description

technical field [0001] The invention relates to petroleum exploration technology, which is used for calculating seismic source construction coordinates in full coverage design of offshore tow cable exploration, and belongs to the technical field of deep sea exploration and acquisition. Background technique [0002] In offshore exploration, seismic waves are generated by several groups of air gun arrays, propagate through the water body in the formation, and are received by the cable (receiver point) that is towed at the stern of the tow cable ship and sinks to a certain depth. An excitation point and one of its receiving points generate a signal coverage at the reflection point (midpoint). The typical way of data collection is that the ship will construct along hundreds of pre-designed routes covering the exploration area in a straight line. After the air gun source reaches the pre-set position, it starts to fire under the control of the instrument. The source ship will fi...

AI Technical Summary

Problems solved by technology

It cannot reflect the characteristics of multiple voyages of the streamer, and cannot adapt to the requirements of multi-voyage exploration of the offshore streamer

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