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Research on the Testing Methods of Instrumental System in the marine magnetic survey

marine Science Bulletin 2007年第2期9卷 1-11页

作者：边刚刘雁春于波肖付民卞光浪海军大连舰艇学院海测工程系辽宁大连116018

Testing methods of instrumental system in the marine magnetic survey have been studied in this paper, and the feasibility of each method has been testified by the observed data. The conclusion shows that the method brought out can effectively eliminate the systematic error caused by the instrumental system, and greatly improve the surveying precision and the reliability of the survey results.

关键词： marine magnetic survey instrumental system testing method

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Pre-rig mobilization hazard evaluation in offshore oil and gas prospect drilling:A case study of TM field,offshore Niger Delta

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能源地球科学(英文) 2023年第1期4卷 158-178页

作者： Oluwatimilehin B.Balogun Olajumoke C.Akintokewa Department of Geosciences Mountain Top UniversityPrayer CityOgun StateNigeria Department of Geology Obafemi Awolowo UniversityIle-IfeNigeria

TM Field,located offshore Niger Delta in the Gulf of Guinea(Nigeria),has been evaluated for potential drilling hazards prior to the drilling of a proposed oil *** is in a region where potential hazards that could inhibit successful drilling exercise have not been adequately *** study adopted the modern technique of offshore geohazard evaluation that relies mainly on suites of geophysical and shallow geological investigations which include ocean bathymetry using multi-beam echo sounder,sidescan sonar,sub-bottom profiler,magnetic,and 2D-high resolution seismic reflection *** results were integrated to draw inferences about the risk potential of the *** the bathymetric survey,water depths were found to range from 345 m to 650 m LAT,with seabed relief being 305 *** depth at the proposed well location was found to be approximately 450 m and the seabed was found to slope in the northwestern *** gradient was computed as 0.05 across the whole *** shallow sub-surface stratigraphic units,labelled A and B,were *** A was directly beneath the seafloor and seemed to be composed mainly of clayey/silty *** thickness ranged from 6 m to 70 m across the study *** B appeared to be a layer of sand and its total thickness was not fully *** kinks and displacements at the flanks of seabed undulations/depressions on subbottom profiler sections suggested that the depressions may be *** the map generated from the marine magnetic data,a magnetic fault was delineated and this appeared to be coincident with the shallower of the two buried faults on the cross-line seismic section cutting through the proposed well-head *** seismic reflection data presented this fault as being *** of the faults mapped,especially the buried ones,appeared to be inactive except a *** with mapped amplitude anomalies are to be avoided during rig-mobilization *** e

关键词： Pre-rig mobilisation Ocean bathymetry Side-scan sonar Sub-bottom profiler marine magnetic survey Amplitude anomalies

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APRIMARY RESEARCH ON marine magnetic DISTURBANCE CORRECTION METHOD USING DUALFREQUENCE GNSS

APRIMARY RESEARCH ON MARINE MAGNETIC DISTURBANCE CORRECTION ...

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第三届中国卫星导航学术年会

作者： Luo Xiaowen,Gao Jinyao,JinXianglong,Li Jiabiao and Chu Fengyou Key Laboratory of Submarine Geosciences,the Second Institude of Oceanography,SOA,Hangzhou 310012

marine magnetic survey is an important mean of geophysical *** magnetic disturbance magnitude,the start and end time,and perfecting magnetic disturbance model are important for magnetic *** this paper,on the basis of that dual-frequency GNSS is able to get the ionospheric total electron content,reflect the nature of the magnetic disturbance characteristics,*** study of magnetic disturbance correction in marine magnetism measurements using dual-frequency GNSS is carried *** quality controlled by the dual-frequency GNSS phase observations,ionospheric total electron content solved by static and dynamic at slant *** the solving with geomagnetic observatories and marine magnetic measurements,the solution showed that there is relatively strong correlation between ionospheric total electron content and marine magnetic *** fact helps to perfect magnetic interference correction model and improve the accuracy of magnetic *** it is a good foundation for the application of GNSS to carry out new areas.

关键词： Dual frequence GNSS marine magnetic survey TEC,magnetic disturbance model

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