| Gudao oilfield is located in the east flank of buried hill drape anticline structure.in Zhanhua depression. The degree of exploration and development is relative mature since it discovered.This research take the Ng5 stratum as objective interval in the centre of the block two section of Gudao oilfield. At present its oil-bearing area is 5.5 squre kilometers,and geological reserves is 537.4×104 tons. With many years development, the main problem in this area are inefficient waterflooding, heavily field flooded, low recovery efficiency, voidage-injection imbalance and serious contradiction in "three overproof". Based on this, the fine description and characterization of reservoir is desiderated.This research utilize the theory of fluvial equal height correlation, divide the major segment Ng5 into 4 small layers and the main thin layer Ng53 divide into 3 sediment timing cells.The present work integrates seismic, well logging, geological to study the top surface of reservoir structure and the distribution of sand bodies.Meanwhile, based on the core analysis data in coring wells, identify the sedimentary environment and hydrodynamic condition of target stratum, analysis the charateristics of property and heterogeneity,establish the accurate heterogeneous model. According to logging data and testing data, the electric standard of distinguishing oil and water intervals is identified, the regularity of oil and water distribution is analysed.The relationship between viscosity and temperture, develop time is analysed by the test of oil viscosity.According to the water distribution, reservoir controlling factors, its type is litho-structure heavy oil reservoir with edge water. Finally, based on the research, establish 3D geological model, laid a foundation for residual oil distribution law and reservoir numerical simulation, provide geological evidence for the next development. |
PDF Full Text Request