Fine Reservoir Prediction Under The Restriction Of Facies Belt

In the development of oil field, the formation with high permeability and high porosity isthe best reservoir. With the progress of seismic exploration technology, the introduction of thenew theory and new model make it possible to predict the reservoir properties On the transversein large areas. Prediction of reservoir permeability has been the difficulties of the oil fieldexploration.At present, using seismic data to predict porosity and correlation of porosity andpermeability can also get permeability distribution, it only considered the porosity but ignoringthe influence caused by changes of the pore type and Pore-throat Radius,which influence isgreater.so if we want to forecast the permeability will need to find a reasonable constraintcondition. As we know, the permeability is affected by sedimentary environment obviously, sothe seismic facies analysis can be the constraint conditions, the reef-shoal reservoirs gven inthis paper is the research object,and its performance is highly affected by the facies belt， thenthe permeability can be marked in a reasonable way. stratimagic seismic facies analysis incombination with geological data Logging data and Core data are used to build the relationshipbetween the sedimentary facies and the Seismic facies, and then distinguish the permeability ofeach seismic facies separately. Then on the basis of containing phase factor of permeabilitycalculation formula is deduced, depending on the phase factor constraints to classify the seismicfacies permeability prediction. Because of the geology interpretation in profile, it can becombined with the geology data for more accurate prediction.The main research works and the main results of this paper were as follows:1．Studied in various facies of reservoir carried out a detailed analysis of log data andextracted standard parameters from various facies of reservoir to calculated Petrophysical data.2．To study the seismic facies and logging facies classification method.According to themethod of logging geology, with reference to geological data of log facies classification, usingstratimagic seismic facies analysis software in combination with geological data the seismicfacies classification.Log facies is divided into various facies of rocks provides to establish therelationship between parameters, the seismic facies classification is to expand the parameters ofthe longitudinal relations on the lateral.3．Containing phase factor of permeability calculation formula was deduced.Sums up thephase factor by archie formula, ke, fluid mechanics formula, the permeability and phase factor. 4．Completed the phase factor of permeability inversion. Comparing with the results ofwave impedance extrapolation permeability inversion, the lateral resolution inversed by thiskind of permeability inversionis improved obviously.