Fine Structural Interpretation And Potential Analysis Of Fuyu Reservoir In Yuan35 Well Area

This paper is based on the high resolution sequence stratigraphy, the seismic interpretation of Yuan 35 well area in Zhaoyuan area is completed, on the basis of seismic interpretation, structural characteristics, reservoir characteristics and reservoir forming characteristics are studied. Continue to analyze the potential area on the basis of the above research, divide the favorable zone and well deployment.The area of Yuan 35 is large, structural features are more complex, the research takes the high resolution sequence stratigraphy as the guide, combined with the seismic data and well logging data, with the synthetic record as a bridge, the stratigraphic division of Fuyu oil layer is completed. The Fuyu oil layer is divided into 1 long term cycles, 2 mid term cycles and 17 short term cycles. The sequence stratigraphic framework was established, and the comparison of FI, FII, FIII and the bottom surface of FIII reservoir groups were completed, the corresponding tectonic map was made. Based on the technology of coherent body, dip position and 3D visualization to recognize faults. Structural traps are developed in the west of the low uplift of the Fuyu oil ayer mostly, the activity of the Fuyu oil layer is gradually decreased from the bottom to the top.Analyzing the sedimentary background of the area, combining the seismic inversion and seismic attribute to carry on the research work of sedimentary microfacies, providing the basis for the potential evaluation. The provenance of the study area is from the southwest and the south, target layer developed in the delta sedimentary systemthrough the core, single well facies and associated well facies analysis, combining seismic attributes and seismic inversion to study the distribution characteristics of sedimentary microfacies in 17 small layers of Fuyu oil layer in this area. In Fuyu oil group, the development of river channel and sheet sand was the main, the FII-FIII oil group was gradually increased, and the FI oil group gradually decreased from bottom to upper stream. The river’s trend mainly contain NE,NNE and NEE.Considering the structure, deposition, transportation system and accumulation dynamic factors fully. The analysis shows that: The reservoir accumulation in the study area is the mode of hydrocarbon migration and accumulation, and the distribution of the connected sand bodies and faults are the main factors that affect the migration of oil and gas; In the structural belt formed by the tectonic zone of the high structural zone format reservoir, the fault zone and the area near fault zone is a favorable place for hydrocarbon accumulation.Based on the structure and reservoir research, combined with the characteristics of oil and gas enrichment and the production of adjacent wells, predict 2 expansion favorable target,1straight well drilling target and 2 horizontal wells favorable target in the study area.