Study On Seismic Inversion Method Of Complex Reservoir

With the improvement of exploration level,the exploration degree of onshore oil and gas resources in China is getting more and more difficult.The seismic inversion results have a strong guiding role in the prediction of oil and gas in complex reservoirs.In this paper,for the conglomerate bodies of the fourth member of the Shahejie Formation in the Guxi fault zone of the Jiyang Depression,the post-stack inversion is first developed,and the post-stack seismic phase-control nonlinearity and geostatistic inversion are respectively analyzed.Both inversions have very good results.The results obtained from the former inversion have a high resolution and do not rely too much on the modeling process.Similarly,the results obtained from the latter have the same effect but the calculation is time-consuming Big.This paper also improves the basic ant colony algorithm that is usually used in order to better detect fractures in carbonate fractured reservoirs in the Chenghai Zhuanghai area.The main improvements are: the use of adaptive C3 coherence algorithm,based on existing The seismic data is calculated as a three-dimensional coherent data volume,and this data volume is used as the basic data volume for detection;Through the analysis of the fracture prediction results,it is concluded that the intelligent optimized ant detection algorithm can better identify small faults and detect the details of faults that cannot be detected by coherent bodies.At the same time,combined with the post-stack nonlinear inversion method,the reservoir was finely characterized to determine the distribution of the reservoir in the study area,and good results were obtained.