Seismic Prediction Of Reservoir Cementation Phase In The Two Or Three Section Of Qingshankou Formation In The Qijia Area

Based on modern sequence stratigraphy, sedimentary petrology, petroleum geology theory; the post stack 3D seismic data phase rotation body, logging data and other various indoor experimental data as the data base; the main research technique in seismic sedimentology technology; with logging data to verify the method; stratigraphic sequence, sedimentary microfacies and diagenesis is the research content of Songliao Basin in Qijia Gulong sag Qingshankou Qingshankou group two or three(Gaotaizi group three or four) the physical characteristics of rocks, sedimentary model and analysis for rock interaction, and using intuitive rule of indoor experimental data and seismic lithologic seismic sedimentology technology, finally get the classification of seismic phase diagram of seismic rock cementation criterion. Method is: first in the region with the well established well seismic contrast and the corresponding relation between the validation of image and well data, and the division of sedimentary facies, in the lithologic data and make the natural gamma and spontaneous potential in the allowable error range to meet the borehole side seismic response. Finally, combined with the sedimentary petrology and reservoir sedimentology theory to this "with" limit, find consistent with the scope, provide more basis for prediction. The slice of seismic sedimentology in the study area drilling or small gaps can predict the distribution of cementation in the range allows for the resolution, combined with the distribution rule of oil and water law of cementation and reservoir development, according to the blank area in the study area are favorable cloth well forecast the rules.Sedimentary environment of the study area of this paper belongs to delta Lake phase, the research horizon in a tectonically stable, with shallow water period, reservoir with gentle structure, stable sedimentary thickness, layer characteristics, sandstone although with strips of thin sand and sandy belt distribution, but is sand shale seismic reflection energy difference is very obvious, reservoir sedimentary model is relatively clear, lateral facies change fast, these reservoir characteristics for the earthquake prediction provides a good environment.Theory, a kind of rock interaction of unit reservoir lithology acoustic features have a significant impact, which also marks the in the seismic signal will influence interpretation is feasible. Strata slice is the core technology of this study, strata slice with plane difference deposition rate and improve wear traditional slicing of some of the disadvantages, so that each slice can achieve the greatest degree. In geophysics, associated with seismic data amplitude and wave impedance properties, making use of the principle of stratigraphic section, amplitude attribute of the image to reflect the distribution of geological plane wave impedance, then according to the relevant parameters and the well cementation data line fitting, establish correlation, according to the correlation in seismic deposition the phase diagram prediction, classification of seismic facies cementation phase, combined with linear curve parameters and wave resistance of cementation, partition of the cementation, and then through the log- core- Section verification, inter well well- Seismic Stratigraphy- laboratory data prediction method of sedimentary microfacies and cementation facies study.