Research On Comprehensive Evaluation About Progressive Exploration Potential Of Shennan Structural Belt

Shennan Structural Belt, a collapse anticline located in the south of Shenxian depression, with 1300×104t of oil reserve,the total area of the anticline is 120km2. Shennan anticline has good petroleum geological conditions, where sizable reservoirs have been discovered. In this area, the structures are complex, seismic data attributes are poor, trap materialization level is low, the reservoirs discovered have the characteristics of multiple oil - bearing zones with aquifers interbeded, thus the effectiveness of exploration and development are restricted.Based on the analysis and research of the regional structure, its characteristics and distributing configurations in horizontal and vertical orientation and the functions of controlling and adjusting the reservoirs are summed up. The factors of controlling oil sand body have been analyzed by the study of combinations of sediment phase,sedimentary microfacies and its vertical overlaps; the body of oil sand were categorized and evaluated. With the research fruits mentioned above the rules of gathering oil and gas towards the structures has been summarized as that the structure grounds control the trends of oil and gas gathering mainly, that sediment phase and the fault of oil source restrict the trends transversely. The distribution of oil and gas was dominated by the fault of oil source and its branches. The degree of oil and gas gathering depends on the blocking condition in side way, the development of oil layers and gathering abilities are under the control of sediment phase and its structure. Its distribution patterns of oil layers are affected by the pattern of sandy body. Oil reservoirs in GUAN TAO GROUP are restricted by rupture obviously. Mainly oil reservoirs developed in and near deep faults with comparatively extensive movements.Finally, combining the research results and the data of probing well, the new block of containing oil will be searched in the verge of the developed block, the more reserves in high quality will be fulfilled and profitable exploration aims will be pointed out, suggestions on the next progressive exploration will be offered as reference. This result will direct the further progressive exploration in the reservoirs of Shennan structure belt.