Reservoir Prediction And Oil-water Distribution Characteristics In 46-116 Block Of Chaoyanggou Oilfield

Fuyu reservoir in Chaoyanggou Oilfield belongs to low porosity and low permeability reservoir,the main reservoir composed by channel sandbody superimposition,but the channel size is generally small,thin sand body,poor connectivity,formation lithology changes fast,and the development effect is poor.With the development of technology development of dense oil and thickened oil,the reservoir through vertical well network fracturing,horizontal well fracturing,volume of steam stimulation development and so on,is expected to achieve effective development.Therefore based on the structure,faulted and the study of the "Four Relations",determine the oil and gas distribution,carried out the geologic and development characteristics in 46-116 block,further implement the reserves potential,explore new effective measures to provide the basis for development planning and favorable area prediction.In the study area has made the following aspects of understanding:1.By comparison with fine synthetic seismogram,horizon interpretation and fracture fine carving,completed the fine structure interpretation,completed the structure map of the key horizon FI1,FI3,FI6,FII1,and completed statistics of each layer of fault elements;2.According to the Fuyu reservoir sand mudstone longitudinal configuration relations,designed geological forward model,researched on forward modeling,carried out optimization in fuyu reservoir seismic attributes,completed the fuyu reservoir sandstone reservoir group forecast,the coincidence rate reached 78.5%;3.Through the experiment,determined the key parameters inversion,used the geostatistical inversion method,completed the sandstone in the study area and effective thickness prediction,The coincidence rate of the well is up to 81%;4.The sedimentary environment of Fuyu oil layer is mainly delta distributary plain subfacies,which is divided into distributary channel,distributary bay and sheet sand microfacies.Controlled by the southwest source,the river is mainly distributed from the north to the east.On the basis of the combination of single well facies and micro facies,the sedimentary microfacies of the 7 layers are plotted by using the principle of sedimentology.5.According to the tectonic interpretation,reservoir structure analysis and oil-water relationship analysis by dichotomy,defined the favorable oil-bearing areas,according to the structure,properties,and effective thickness of sandstone prediction map,selected 5 horizontal wells,including 4 wells in FI3,1 well in FI5.