The design idea,structure design and selection of digital filter chip of different seismic instrument manufacturers are unique, so the filtering characteristics and technical performance is different.With the wide application of nodes instrument,the hybrid acquisition between cable instrument and nodes,different nodes instruments become more common.In order to guarantee the data consistency of hybrid acquisition,we need to consider the filtering method,the pre-amp gain matching,the selection of low cut frequency and the method of DC offset removal,and choose the appropriate parameter to eliminate the impact as far as possible.We should focus on the first sample handling method of different instruments also,the best solution is to optimize the control timing sequence of source excitation system and ensure the start time on the edge of whole seconds(or 4,8ms),so it always can find the sample＇s recording time which coincides with the GPS time at excitation time perfectly.Because the data parsing and compositing method of different seismic instruments is different,so it needs to plan the work process according to the working principle ahead of schedule,and that will improve work efficiency.

In offshore seismic exploration operations,the integrated navigation system plays a crucial role,which is not only responsible for the real-time navigation and positioning of the operating vessels,but also undertakes the tasks of comprehensive monitoring of the operating site as well as data acquisition and control.This paper introduces the composition of Geo SNAP Dolphin and explains its technical characteristics in detail,and demonstrates its advantages in system construction,simplified configuration,data communication and integrated operation,etc.Finally,combined with the practical difficulties encountered in offshore seismic exploration projects,it further elaborates on the effective solutions of Geo SNAP Dolphin and its remarkable effects in practical application.

The vibroseis will produce various types of noise during construction,which also includes the additional noise generated by the mechanical movement of the source itself,which will produce interference signals in the seismic record and reduce the signal-to-noise ratio of the signal.This not only affects the quality of geological exploration data,but also affects the reliability and stability of the hydraulic system,resulting in damage to the system equipment.From the angle of hydraulic system design,this paper analyzes the cause of the noise produced by vibroseis hydraulic system,puts forward the corresponding noise reduction measures for the main noise sources,and compares several common noise reduction methods to provide reference for the research of noise reduction of hydraulic system.This paper analyzes the cause of the noise produced by the components of the vibroseis hydraulic system,and briefly expounds the solution when the noise occurs during the operation of the vibroseis.

This paper mainly studies the method of accurate design and extracting accurate coordinates on the UAV aerial piece when the vibrator source is used in the petroleum seismic exploration project. After the UAV completes the aerial flight in the seismic work area,the vibrator construction path can be designed on the UAV according to the specific landform conditions,then apply the geographic information software ArcGIS to project the vibrator path into the field coordinate system and extract the focal path coordinate file,import the coordinate file into the mapping software cass,then use the mapping software cass to design the source of the project,and finally install the standard source navigation data format for seismic construction.Through specific experiments,prove on the UAV aerial design,application of geographic information software ArcGIS and surveying and mapping software cass extraction coordinate accuracy and artificial RTK(Real-time kinematic,real-time dynamic carrier phase difference measurement)lofting accuracy,reach centimeter level,fully conform to the requirements of the oil geophysical measurement specification,this method can realize the precise design of the focal navigation point design.This directly on the UAV precision design vibroseis point and use the software directly extract the coordinates of innovation method to oil seismic exploration project focal point coordinate design to realize the software,intelligent,replace the previous artificial RTK measurement operation,improve the production efficiency,in ensuring the quality of focal point design while saving the production cost,and avoid the danger of the measurement field operation.

eSeis node unit is an important equipment used for data acquisition in modern seismic exploration node instrument,and the quality of the acquired data will directly affect the accuracy of the later data processing and geological structure interpretation.This paper starts with the principle of eSeis node unit collection index test,analyzes the causes of its collection index test failure in detail,and summarizes several common faults and specific diagnosis and maintenance strategies,so as to ensure the accuracy of node unit data collection index,ensure the node unit can work stably,and maintain the quality and reliability of data collection.It provides effective technical support for field operation.

In the construction of geophysical survey project,the RTK operation mode of 1reference station and multiple rover stations is usually adopted,and the construction will be suspended every day due to the inability to receive the radio relay signal,and the rover station needs to wait for the radio relay to relay the signal before normal construction.When the rover does not have a datalink differential signal or network signal and cannot be constructed normally,the endurance function of the Starlink provides a new solution for the continued construction of geophysical surveying.This article introduces the Starlink endurance function(aRTK)of China Atlas and the Starlink endurance function of the G970II.GNSS receiver,and the test and accuracy analysis of the Starlink endurance function.After comparative analysis,it is concluded that if the Starlink battery life function is used,the construction can be continued within 20minutes after the radio relay signal is lost,which solves the problem of stopping the operation due to the lack of radio signal for a short time,and improves the production efficiency.