oa Hydrocarbon Exploration By Integrated Geophysics Methods in the Barents and Pechora Seas. Experiments and Results

In 1991 • 1993 MAGE carried out high resolution marine gravity and gradient hydromagnetic survey on three oil perspective fields in the Pechora Sea (Prirazlomnoe, Medynskoe, Alexeevskoe) as well as two gas perspective fields in the Barents Sea (Sbtokmanskoe and Ludlovskoe). The purpose of the exploration was to define the possibility of the marine gravity and gradient magnetic survey in the area of high latitude to solve problems of geological mapping and hydrocaJbon deposits prognosis. The study has been fulfilled by the Russian equipment. Accuracy of the gravity anomaly·is less than :1;0,15·0,25 mGal. Magnetic measurements precision is less than :tl • 2 nT. The distance between lines is 0,5 Ian in the Pechora Sea and 1 • 2 Ian in the Barents Sea. The study of the sea bottom relief structure plays an important role for the exploration of the field tectonic structure on the sbelf of the Barents and Pechora seas. Interpretation potential fields data with regional seismic, log analysis and relief help to receive the new information for geological structure of the hydrocarbon deposits.