LAB 01 - SHOT NUMBER 16

In this section, we will examine a bad trace exist in shot gather number 16. The shot gather are display in single plotting. Basically, we apply the same script for this section except changing the number of shot extracted from 8 to 16 by the line number 6, shot_num=16;. The following process are shown in the lab work below:-

MATLAB SCRIPT LAB 1.2

load SeismicData_C.mat
whos
load ('SeismicData_C.mat','H')
[sx,sy,gx,gy,shot_gathers,num_trace_per_sg,sz,gz] = extracting_geometry(H);

%% Display wiggle shot num 16
load SeismicData_C.mat
shot_num=16;
p=0;
[Dshot,dt,dx,t,offset]=extracting_shots(D,H,shot_num ,p);
scale=1;

Figure 1: variable area display shot number 16

%% Display grey scaled variable density display
mwigb(Dshot,scale,offset,t)
xlabel('Offset(ft)','FontSize',14)
ylabel('Time(s)','FontSize',14)

Figure 2: grey scaled density display shot no 16 

%% Display color variable density display
figure,simage_display(Dshot,offset,t,0)
xlabel('Offset(ft)','FontSize',14)
ylabel('Time(s)','FontSize',14)

Figure 3: colored variable density display shot no 16

Figure 4: wiggle on top of colored plotting area display shot gather no 16

In shot gather number 16, notice that trace number 31 amplitudes are increasing as time increases. This may require editing by muting this trace since it will affect the subsequent processing step. In the next section, we will extract more shot gathers to enhance the image or to appear the noise trace.