Research On Three-dimensional Nine Component Seismic Exploration Technology

In unconventional oil and gas exploration areas,the understanding of reservoir formation and migration control factors such as the development degree and distribution law of reservoir fractures and fluid migration channels in fractures is the key to increasing reserves and production.In this case,compared with P-wave exploration,multi wave and multi-component seismic exploration can provide more comprehensive and accurate geological information in reservoir prediction and crack detection,so it has become an important exploration means.The main research contents include: analyzing the difficulties of vector exploration,demonstrating the three-dimensional nine component seismic acquisition method and summarizing the relevant characteristic technologies of seismic acquisition and processing;prestack multidomain amplitude-preserving denoising is carried out for P-wave and S-wave seismic data to retain the frequency information related to formation gas bearing and post stack inversion to the greatest extent;research on fine structure interpretation,attribute analysis,gas bearing prediction and reservoir prediction is carried out based on the seismic data processed by fast and slow wave separation.The following conclusions are drawn:(1)The first three-dimensional nine component seismic exploration in the world was successfully promoted and high-quality P-wave and S-wave three-dimensional seismic data were obtained by using P-wave and S-wave combined excitation and reception technology,Swave excitation angle recording and quality control technology,P-wave and S-wave static correction technology and four component vector rotation technology;(2)The three-dimensional shear wave seismic data can solve the problem of P-wave structural imaging distortion more thoroughly,accurately describe the development characteristics of the main structure and peripheral structure of the gas field,provide an accurate structural model for gas field development,and further confirm the advantages of shear wave seismic in solving geological problems;(3)We have creatively carried out horizon calibration by using VSP combined P-wave and S-wave seismic data,search of low amplitude structure and identification of micro faults by Pwave and S-wave seismic data,S-wave post stack inversion,and achieved certain results,accumulating experience for the development of geophysical exploration technology in the direction of vector exploration.