Abstract:Seismic interpretation work is doubled because of the development of 3-D seismic technique and the various display of high sample density seismic data, Using widely the 3-D time-slice sections in seismic interpretation,interpreter can get twice the result with half the effort.The display and interpretation of 3-D time-slice sections in GN prospect in Jianghan plain are illustrated sufficiently in the paper, 3-D time-slice sections include positive amplitude time slice, negative amplitude time slice, same polarity dual density time slice, whole amplitude time slice and double density time slice, From the time slices,we can know formation occurrence, structure shape, fault characters,formation contact and the shape of specific geological bady(salt dome). The time-slice sections can be used to plot time contour map,The steps are as follows: (1) choosing horizon and block, that is to say,the horizon to be mapped should be chosen by analysing available drifling data and seismic section across drilled well, then,according to reflection band character, the chosen horizon is divided into blocks,which are interpreted qualitatively; (2) finding the faults and tracing horizons; (3) plotting the time contour map (taking the values of speaks).It seems that in this method,all the data of the mapped horizons are sequentially plotted on a plane figure to simplify the tedious process of taking values.The merits of using time-slice sections in in-terpretation are the use of more seismic inForm}tions and the higher accuracy in plotting.
收稿日期: 1985-08-19
引用本文:
李建齐. 江汉GN地区三维地震切片解释方法[J]. 石油地球物理勘探, 1986, 21(3): 315-325.
Li Jianqi. The interpretation of 3-D time slice sections in GN prospect, Jianghan plain. OGP, 1986, 21(3): 315-325.