Study Of Lithology-oriented Processing Methods And Reservoir Prediction For ES3 Formation Of Hu19 Fault Block In Dongpu Sag

With the continual increasing of complexity for oil and gas exploration anddevelopment and progressive maturity of seismic interpretation techniques, interpretationtechnology for seismic data was developed from simple structural interpretation to reservoirprediction and characterization with the guide of fine structural interpretation. How toacquire accurate lithology information such as amplitude, frequency, wavelet and phase is akey factor to improve the accuracy of reservoir prediction. Therefore it's necessary toconduct the study of high resolution seismic data processing methods and techniques ofpreserved amplitude, frequency, phase and wavelets so as to get high-resolution, high S/Nratio and high-fidelity as well as preserved amplitude seismic data according to thecharacteristics of different targets.In this dissertation lithology-oriented processing technology series includingpre-stack/post stack S/N ratio enhancement technique, relatively preserved amplitude toincrease resolution technique and wavelet consistent processing technique were analyzed andstudied based on the analysis of geological character and raw data feature of Hu19 faultblock in Dongpu sag. With the application of the abovementioned techniques, the processedfinal results of Hu19 fault block had following features: the character of wave group wasclear, the relative variation of amplitude could reflect the variation of subsurface lithology,S/N ratio and transverse contrast of wave group were enhanced, the quality of seismicsections with lithologic facies changes was improved, and resolution was also increased,which provided a sound basis for sequent reservoir prediction.Hu19 fault block is a development block which was already put into production, and themain pay zone is ES34S-7,ES34S-6sand formation. On the basis of Hu19 fault block seismicdata of lithology-oriented processing and stratigraphic interpretation of reservoir in thispaper, comprehensive prediction technologies such as seismic inversion, seismic attributeanalysis, frequency division processing and coherence cube analysis were studied aiming attarget zone, i.e. Es3 formation. Meanwhile by using quantitative prediction approaches suchas Prediction, Contouring, Robust Contouring and so on, reservoir prediction was carried outfor the sand thickness and distribution of ES3^3-2 ,ES3^3-1 ,ES3^4S-7 + ES3^4S-6 ,ES3^4S-5ofHu19 fault block, and the distribution rule of Es3 sand formation in this block wassummarized. Through reservoir prediction in this block it's concluded as follows: There's a rapid variation in the spatial distribution of sand in Hu19 fault block The diversity of physical properties is obvious The heterogeneousness of reservoir is distinct It has the capability of forming lithologic reservoir because of relatively lowstructure location in those areas without wells, where are to the south of WellHu19-27, the north of Well Hu19-22 and the west of Well Hu19-24.