Features Of Gravity-magnetic Field And Hydrocarbon Prospect In The South Of The Jan Mayen Ridge

Large areas of hydrocarbon seedlings were found in the Greenland basin and Norwegian basin,while the Jan Mayen ridge has the same sedimentary sequence as the Greenland basin and the Norwegian basin.Seismic exploration in the area is completed,but due to the deep sea,the seismic data is not clear enough,the exploration level is still low.In order to make a further study on the stratigraphic features of the Jan Mayen ridge,a comprehensive study on the fault system,stratigraphic development characteristics,tectonic units and favorable areas of oil and gas in the basin is carried out in combination with geophysical data such as gravity-magnetic and earthquakes.The existing gravity and magnetic data of the Jan Mayen ridge will be processed by means of the following.They are the analytic continuation,moving average,the vertical second derivative,the total horizontal gradient.By these means,all kinds of transformation parameters datum can be obtained.The characteristics and causes of gravity-magnetic anomaly in this region will be systematically analyzed and the fault structures will be speculated through combined with other geophysical data.By analyzing the structural characteristics of gravity and magnetic anomalies and their various conversion parameters,the tectonic units of the study area are also divided into the structural evolution and geological background of the study area.Combining the tectonic evolution,stratigraphic development and the combination of oil and gas reservoirs in the Jan Mayen and its adjacent areas,the favorable area of oil and gas in the study area is predicted.The main results of this dissertation obtained are as follows:According to the comprehensive analysis of the characteristics of gravity and magnetic field,six main faults were deduced in the study area;Through the study of the fracture of the study area and combined with the previous studies,the study area can be divided into the West depression of Jan Mayen,the Jan Mayen central convex belt,the depression of Jan Mayen,the the southern depression of Jan Mayen;the East depression of Jan Mayen There are two sets of oil and gas systems developed in the study area.