On June 9, the research on the research on the imaging technology of three-dimensional earthquake fracture in the northwest oil field passed the identification of sinopec, which reached the international advanced level.
In the northwest oilfield, the reservoir is buried deep, and the target layer of the northern region is more than 7000 meters on average, which is the deepest reservoir in the world, resulting in low resolution of geophysical data. Continued in recent years, the northwest oilfield geophysical detection technology research, form a complete seismic data acquisition, processing and interpretation of the three characteristics of geophysical prospecting technology sequence, the reservoir description by the "elephant" is a "skilled and magical craftsmanship", drilling also changed from "touch" to "watch", implement the location precision. The project through review is one of the seismic data processing techniques.
The project has established the desert the absorption attenuation of seismic data integration compensation technology, including the use frequency of the gun set data modeling and compensation surface Q value obtained, using frequency component after stack data to build 3 d Q model data volume, the stabilization inverse Q filtering algorithm improve the desert absorption attenuation compensation effect of 3 d seismic data. At the same time, establish the igneous rock facies complex velocity modeling by determine the distribution of igneous rocks, the volcanic rock area encryption grid tomography and point by point velocity analysis, and the known drilling logging data contrast, determine the speed of different types of igneous rock, improve the hydrochloride salt rocks seam fracture and hole type reservoir accurately imaging precision.
The results of the study were applied in 1 well and 1 well south of shunbei, and the processing area was 2297 square kilometers, and the development characteristics of several north east fault zones in the study area were carried out. At present, the rate of drilling in the north area is 100 %.
The experts believe that the result is an important driving force for seismic exploration in large desert areas, and has broad application prospects in seismic exploration of similar geological structures in China.