The Oilfield Fork In The Chaheji - Bifurcation South Blank Area Scroll The Exploration Potential Of Research

The gap belt "Central - Southern Chaheji Oilfield" lies between 33rd & 15th faulted black of Chaheji. There're several scattered oil wells of which interest zones are 3rd section of Dongying Group & upper 1st section of Shahejie Group there. It belongs to structural - lithologic oil reservoir with inferior - distribution & changeable reservoir in horizontal and vertical direction, where there is a sparse oil - net and lower recovery degree. Distribution law of reservoir plays an important role in exploration & development in the gap belt.1.Seismic Data ProcessOriginal data was re-processed applying such techniques as noise elimination (Emigration homing on prestack and / or poststack data, consequently, signal - to - noise ratio and resolution have been improved with distinct breakpoint and geological phenomenon.2.Stratigraphic Classification & CorrelationBased on index beds determined by data from old wells, formation is correlated from thick to thin one by one according to level and thickness of sedimentary cycle, that is, stratomere is correlated with index beds and sand group is correlated based on sedimentary cycle with facies thickness. Finally, right bed's boundary is determined through character of reflection is correlated repeatedly on 3D seismic profile with correlation of binding wells profile.3. Structure Interpretation carefullyFirstly, digitized procession is done on interval transit time curve, natural gamma curve, natural current potential curve of 31 wells and resistivity curve among of part wells. Secondly, synthetic seismograms of 31 wells are finished by applying LardMark Software & the software made by ourselves. Thirdly, the demarcation is done through the curve of seismic vertical time range that of vertical time range got by synthetic seismograms. Finally, the top structure form of every interest zones is determined carefully applying full 3D careful interpretation techniques of targets.4.Reservoir PredictionSedementary micro - facies is studied, the pinchout of sandstone is determined and the distribution of reservoir is made clear in vertical & horizontal direction through pre-processing 3D seismic data & well-log data and predicting reservoir on interest zone applying structure - well log constrain non-linearity inversion software.5. RecognitionAccording to structure, reservoir, sedimentary facies research and integrated evaluation on potential of interest area, the disposition suggestions of four wells of rolling adjustment are raised.