Application On Key Processing Technology In Kuche Mountain Region Of The Tarim Basin

Foreland thrust belt is China's important petroleum exploration areas which containing oil and gas resources In the western region of China. The Tarim Basin has been considered the substitution of oil-gas resource Strategic areas and important reserves in our country. The data shows, oil and gas resources total surplus oil and gas in the tarim basin is the first in the 500 basin of our country. large numbers of facts prove that petroleum geology condition is superior and the exploration potential is tremendous in Kuche Depression of the Tarim basin northern ,the exploration difficulty of steep construction is increasing with the exploration degree of improvement, the present exploration techniques can't find out favorable structure target, seismic imaging face to austere challenge。The first is that complex the surface and geological conditions result in low signal-to-noise ratio data. The second is the rapid changes of surface structure and velocity arouse complex static correction problems , The third is that the underground complex structure and the wave field complex lead to establish speed-depth module is very difficulty for migration imaging. due to the foreland thrust belt have a large of reverse thrust and reverse velocity that lead to image distortion in time domain, velocity traps is hard to avoid. So that, the migration of in time is very difficult in both domain and depth domain. To enhance signal-to-noise ratio,to resolve static problem and to study Technology of depth imaging with Integration of processing and interpretation are technology key to resolve complex structure imaging in Kuche depression. the above technical breakthrough bottleneck Has very important practical significance to Complex mountainous area of reservoir exploration.This thesis is relying on the geophysical research projects in recent years, the use of seismic data processing technology is the basis of the absorbing fruits of predecessor 's work by fully excavate potential of present technology. To research key processing technology such as static, noise attenuate, wide-line processing, CRS, pre-stack migration processing technology and so on. Innovating those technology method and establishing a suitable processing flow for imaging complex structure by application of first-break residual static correction, multi-windows simulated annealing algorithm, Long and Medium Wavelength Static Correction, weight-CRS, pseudo-3D wide-line data processing and pre-stack migration.Not only solved the practical problem for Kuche complex mountain region, and providing a method of solving practical problems for other similar region. The application of technique achieved good effect to complex structure under the steep salt in Kuche mountain region.