sconstruct

国外免费地震资料处理软件包

from rsfproj import *

##################################
# Usefule plotting functions
##################################

def velplot(title,label1='Depth',unit1='kft'):
    return '''
    grey color=j allpos=y title="%s" scalebar=y
    barlabel=Velocity barunit=kft/s
    label1="%s" unit1="%s" label2=Lateral unit2=kft
    barreverse=y pclip=100 
    ''' % (title,label1,unit1)

def graph(transp,o2,d2,n2,col,fat,extra=''):
    return '''
    graph transp=%d yreverse=y pad=n min2=%g max2=%g
    plotcol=%d plotfat=%d wantaxis=n wanttitle=n %s
    ''' % (transp,o2,o2+(n2-1)*d2,col,fat,extra)

def wiggle(title):
    return  '''
    wiggle transp=y yreverse=y poly=y xpos=${SOURCES[1]}
    title="%s" label2=Half-Offset unit2=kft zplot=0.5
    wherexlabel=t wheretitle=b
    ''' % title

Flow('modl',None,
     '''
     spike n1=200 o1=-8 d1=0.08 n2=4
     nsp=4 k2=1,2,3,4 mag=1,2.2,3.5,5
     ''')
Flow('refl',None,
     '''
     spike n1=200 n2=4 nsp=4 k2=1,2,3,4
     mag=0.0909091,0.1428570,0.1111110,0.2000000
     ''')
Flow('mod1','modl','window min1=0')

Flow('unif','mod1','unif2 n1=110 d1=0.05 v00=5,6,8,10,15')
Result('modl','unif',velplot('Model'))

Flow('mod2','unif','math output=5+2*x1')

Plot('modl','mod2',velplot('True Model'))
Plot('modla','mod1',graph(0,0,0.05,110,0,20,'scalebar=y'))
Plot('modlb','mod1',graph(0,0,0.05,110,7,5,'scalebar=y'))
Result('modl2','modl modla modlb','Overlay')

Flow('clean','modl refl',
     '''
     kirmod nt=501 dt=0.004 freq=25 refl=${SOURCES[1]}
     ns=12 s0=1.4 ds=-0.1
     nh=64 h0=0.1 dh=0.1
     vel=5 gradz=2 type=v
     ''')
Flow('data','clean',
     '''
     noise rep=y seed=2004 range=0.0002 |
     ricker1 frequency=25 |
     add $SOURCE 
     ''')

shots = []
for shot in range(0,12,5):
    data = 'data%d' % shot
    shots.append(data)
    Plot(data,'data',
         '''
         window n3=1 f3=%d | tpow tpow=2 |
         grey title="Shot %d"
         ''' % (shot,shot+1))
Result('data',shots,'SideBySideAniso')

v0=4
dv=0.075
nv=120

###############################
#
# Processing individual CMPs
#
###############################

###############################
# Create offset and cmp headers
###############################
Flow('off','data','window n1=1 | math output="0.5*x1" ')
Flow('cmp','off','math output="input+x2" ')

##############################
# Loop over selected cmps
##############################
for x in range(1500,4000,500):    
    ##################
    # Extracting CMP
    ##################
    y = 0.001*x
    cdp = 'cdp%d' % x
    off = 'off%d' % x
    msk = 'msk%d' % x    
    Flow(msk,'cmp','mask min=%g max=%g' % (y-0.001,y+0.001))
    Flow(off,['off',msk],
         'spray axis=1 n=1 | headerwindow mask=${SOURCES[1]}')
    Flow(cdp,['data',msk],'headerwindow mask=${SOURCES[1]}')
    Plot(cdp,[cdp,off],wiggle('CDP gather for cdp=%g' % y))
    ##################
    # Velocity Scan
    ##################
    scn = 'scn%d' % x
    Flow(scn,[cdp,off],
         '''
         vscan offset=${SOURCES[1]}
         semblance=y v0=%g dv=%g nv=%d
         ''' % (v0,dv,nv))
    Plot(scn,
         '''
         grey color=j allpos=y
         label2=Velocity unit2=kft/s title="Velocity Scan"
         ''')
    ##################
    # Velocity Picking
    ##################
    pik = 'pik%d' % x
    Flow(pik,scn,
         '''
         mutter x0=4 inner=y v0=3 half=n |
         mutter x0=4 inner=n v0=8 half=n |
         pick rect1=50 vel0=5 gate=10
         ''')
    Plot(pik+'a',pik,graph(1,v0,dv,nv,0,20))
    Plot(pik+'b',pik,graph(1,v0,dv,nv,7,5))
    Plot(scn+'a',[scn,pik+'a',pik+'b'],'Overlay')
    ##################
    # NMO
    ##################
    nmo = 'nmo%d' % x
    Flow(nmo,[cdp,off,pik],
         'nmo offset=${SOURCES[1]} velocity=${SOURCES[2]}')
    Plot(nmo,[nmo,off],wiggle('Normal Moveout Applied'))
    #####################
    # Putting it together
    #####################
    Result(cdp,[cdp,scn+'a',nmo],'SideBySideAniso')

####################################################
#
# Processing the whole dataset
#
####################################################

#####################
# Convert shot to cmp
#####################
Flow('cmpdata cmpmask','data',
     '''
     reverse which=4 |
     put o2=0.05 d2=0.05 |
     shot2cmp mask=${TARGETS[1]}
     ''')
#####################
# Velocity scan
#####################
Flow('scan','cmpdata cmpmask',
     '''
     vscan semblance=y mask=${SOURCES[1]}
     v0=%g dv=%g nv=%d
     ''' % (v0,dv,nv))
#####################
# Velocity picking
#####################
Flow('pick','scan',
     '''
     mutter x0=4 inner=y v0=3 half=n |
     mutter x0=4 inner=n v0=8 half=n |
     pick rect1=50 rect2=100 vel0=5 | window
     ''')
Result('pick',velplot('Stacking Velocity','Time','s'))

#####################
# NMO and stack
#####################
Flow('nmo','cmpdata cmpmask pick',
     'nmo mask=${SOURCES[1]} velocity=${SOURCES[2]}')
Flow('stack','nmo','stack')
Result('stack','grey title="NMO Stack" ')
    
End()