Study On Resolution Enhancement With Combination Of Seismic And Logging Data

The main geological target has transferred from ordinary structural reservoir to complex structural reservoir and subtle reservoirs with the development of technology in oil exploration.High resolution processing technology turns to be obstacles to overcome for many petroleum companies.However ordinary methods to expand the frequency of seismic data or compensate frequency have many kinds of disadvantages.Focusing on the characteristic that seismic data usually has poor resolution and methods of expanding frequency band have many disadvantages,in this article I talk about the expanding frequency band method with the help of logging data and horizon data.The research focuses mainly on the following two parts:1?Expanding seismic frequency band method which combines logging data and interpretation horizon data.2?Multiple data reconstruction method.In the first part,I propose a method that can improve seismic resolution using logging data.Specifically it contains an optimized seismic-well tie method using DTW(dynamic time wrapping)and expanding seismic frequency band method which combines well logging data and interpretation horizon data with the constraint of signal noise ratio spectrum.The procedures of tying wells with seismic data are introduced in detail including preprocessing of well data,making synthetic seismograms,analyzing synthetic wavelet and adjustment of seismograms.Then I introduce a method named DTW from pattern recognition domain which can be used in adjusting the synthetic seismogram to match with the borehole-side trace,finally theory of deconvolution and expanding seismic frequency band method at wells and between wells is introduced.In the second part,multiple data fusion and reconstruction method is discussed.First of all,I count up the energy of different frequency range in the area,and makes principle of frequency fusing.Second of all,frequency fusing in time domain,frequency fusing in frequency domain and reconstruction method based on wavelet transform is talked about,In the end I compare and analyze the advantages and disadvantages of each method.By verification of model and real seismic data,the method to build a seismic-well tie in this paper is effective,and the method to expand the seismic frequency band can do a good job with nearly unchanged signal to noise spectrum,and can improve the resolution of seismic data.Multiple data fusion and reconstruction method can be used in model and real seismic data.