Seismic Interpretation And Favorable Reservoir Prediction Of Ming Huazhen Group In Huanxi Oilfield

Huanxi oilfield is located in the south section of the western slope of Western Sag,in the study area of the project is located in Huanxi Oilfield's in step.Huanxi Oilfield found that twowells in the Minghuazhen group having gas reservoir through methods of screening old wells,drilled interpretation of electricallogging and drilling process tracking etc.The reseach is to find high point and development potential of gas reservoir.Establishing the sequence stratigraphy of research area with logging data and completing stratigraphic division and correlation of all oil group in Minghuazhen Formation.After horizon calibration,starting structure interpretation of seismic data of Huanxi oilfield,eventually completing four seismic reflection layer of top and bottom of the Ming ?,Ming?,and Ming ? sandstone group's interface explanation.The use of Analyzing the structural feature and fault breakpoint location with coherence technique and flattening technique,and correcting synthetic velocity field by VSP logging data etc,finally,establishing high accuracy variable velocity field and drawing up structure maps of the top and bottom boundary of main target layers.the analysis of the structure in the area show:research area mainly develops NEE and nearly EW fault in Minghuazhen period and few NE faults,which confirmes the weak influence of the right-handed during the strike-slipping force NNE and NE fault during Shahejie group convert to NEE and nearly EW fault.The Jason reservoir inversion results shows that sandstone reservoir development of Ming ? and ? is good,which is the main exploration targets in this area.The synthetical of structure,deposition and reservoir characteristics summarize that possible hydrocarbon Source,caprock conditions,migration passway condition and preservation conditionnatural of gas source in the Minghuazhen group,and it is found that the distribution of oil and gas in this region is mainly controlled by the reservoir,trap and migration pathway,and arranging three wells.