Structure Interpretation And Reservior Prediction Of Fuyu Oil Layer In Southern Mutou Area

Mutou area has entered a stage of high development benefit evaluation.The main reservoir types are fault-lithology and lithologic reservoir.To speed up the progress of reservoir evaluation, the study carry out a fine structure interpretation and reservoir prediction research, guide the evaluation of well placement effectively, then seek out the benefit reserves.Be based on the forming research,form a set of sand body prediction system and evaluation of technical process.Taking the the seismic data, logging data and geological data of of the mutou blocks with a combination ideas, the research content and understanding as the following several aspects:The structure interpretation work in the area, including:(1) Layer of a interpretation(single-well calibration, multiwell correlation of strata, T0 mapping);(2) The fault interpretation(forward modeling, coherent, curvature, etc.),6 implement the faults, 13 extending fault;(3) Built fine velocity field;(4) Structure mapping, the springs of the top four,I sand bottom, II sand group underside structure map and carries on the precision analysis, for the next step to identify the underground geological structure and reservoir prediction to lay the foundation;Based on the 91 Wells in the area of the curves, conducting environmental correction,standardization, for single well logging interpretation, finished the work area within the pits in oil-water layer identification, as well as realize the reservoir prediction using well log data research preparation work;Reservoir prediction technology basically has the following four aspects:(1) Purpose layer is more thin interbed in the study area, sand body identification is difficult, in view of the objective layer for phase-shift technology processing, seismic reflection characteristics and the lithology characteristics corresponding relation;Has carried on the attribute extraction layer(2) Based on the extracted seismic attribute and analyzing data of well known, it can be associated with deposit and oil and gas properties, so as to achieve the aim of predicting reservoir;(3) Carry out waveform clustering: based on the seismic waveform classification effectively, find out the general regularities of the variation of the waveform, so as to achieve the purpose of the analysis of seismic facies change law;(4) The inversion prediction, forecast the impedance in the study area;Basis on the above research, to the core facies, logging facies, seismic facies in the study area is described, and ultimately divided fuyu reservoir and identifying the I sedimenta-ry microfacies plane distribution characteristics of sand groups;The reverse faults in the study area development, from the southwest provenance was nearly north-south, north west fault cut, qingshankou formation large set of mudstone formation of oil and gas to provide a good sealing conditions, formed the fault-lithologic reservoir;Carry out the favorable area for comprehensive evaluation and optimizing 5 well location.