Fine Structural Interpretation And Seismic Reservoir Prediction In Liang11 Fault Block Of Shinan Oilfield

With development of complex fault-block oilfield has entered the later stage of high water cut the remaining oil prediction has become the core problem of oilfield development and the bottleneck of enhanced oil recovery. The key problems of controlling the remaining oil distribution are structures with micro amplitudes, lower-order faults and sand-bodies distribution between wells, which are the core contents of fine structural interpretation and reservoir prediction under dense well patterns.This paper takes Liang11 fault block of Shi Na Oilfield as an example, according to the above problem, make full use of 3-D seismic data and in combination with geological, well logging, drilling data, makes the fine structural interpretation ofto,and focus on lower-order faults interpretation. Based on the seismic data, drilling breakpoint data and dynamic development data, in combination with horizontal slice, coherence analysis, dip angles, azimuth, attributive analysis and maping technique, interpretation accuracy is improved greatly by well-seismic integration,identified low-amplitude structure above 10 m and lower-order faults above 8m.A distribution of seismic facies can be changed into sedimentary facies based on sedimentary structures,seismic,core and logging data. The main sedimentary microfacies comprise underwater distributary channel and mouth bar in and.Through optimization of inversion parameters, the restrained stochastic inversion for wave impedance is optimized. Analysis the inversion results of section and slices,identified sand bodies above 3m, the characteristics of sand-bodies distribution are determined, the accuracy of predicting sand-bodies between wells is risen, and the understanding about the sedimentary microfacies are improved. The study is very important to optimize the oilfield development adjustment plan.