A dual-source seismic exploration method and system for offshore seismic exploration

Abstract

The invention discloses a double-source seismic exploration method and system based on marine seismic exploration. The method comprises the following steps that the current position of an exploration ship is detected, the time that the exploration ship arrives at a predicted shot point is calculated, and a trigger signal is sent to a control device Tms before the ship arrives at the predicted shot point; after the trigger signal is received, a random array sequence An (S, T1, T2) is generated, and excitation signals are sent to a first gun control system and a second gun control system according to the random array sequence An (S, T1, T2); after the excitation signals are received, a first seismic origin and a second seismic origin are triggered; seismic waves triggered by the first seismic origin and the second seismic origin are sensed and corresponding first seismic data and second seismic data are generated; the first seismic data and the second seismic data are received and are recorded on a recording channel. According to the double-source seismic exploration method and system based on marine seismic exploration, the conventional towing mode of a seismic collection workboat is not changed, multiple seismic data are acquired under the condition that a small amount of activity cost is increased, and therefore requirements for deep-layer seismic exploration are satisfied.

Description

technical field

[0001] The invention relates to the field of marine geophysical exploration, in particular to a dual-source seismic exploration method and system for marine seismic exploration. Background technique

[0002] The marine geophysical surveying system is a system used to collect geophysical data from the strata below the bottom of the water body of a lake or ocean, such as marine seismic data acquisition systems, marine seismic survey systems, and electromagnetic survey systems. A marine seismic survey system typically includes a seismic survey vessel with onboard navigation, seismic energy control, and geophysical data recording equipment. Seismic survey vessels typically tow one or more sensor streamers aft of the vessel. The seismic energy control device activates one or more seismic energy sources at selected times. Signals generated by individual sensors on the sensor streamers in response to the detected seismic energy are ultimately conducted to recordin...

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