steadfastasart/geoscience-skills/lasio

import lasio
# Read
las = lasio.read("well.las")
# Access data
df = las.df()                    # DataFrame (depth as index)
gr = las['GR']                   # Single curve as numpy array
depth = las['DEPT']
# Well info
well_name = las.well['WELL'].value
uwi = las.well['UWI'].value
# Write
las.write('output.las')

las = lasio.read("well.las")
print(las.curves.keys())         # Available curves
print(las.well)                  # Well section headers
print(las.version)               # LAS version info

# As numpy arrays
gr = las['GR']
depth = las['DEPT']
# With metadata
curve = las.curves['GR']
print(curve.unit, curve.descr)   # 'GAPI', 'Gamma Ray'

import numpy as np
las = lasio.LASFile()
las.well['WELL'] = lasio.HeaderItem('WELL', value='Test-1')
las.well['UWI'] = lasio.HeaderItem('UWI', value='12345678901234')
depth = np.arange(1000, 2000, 0.5)
las.append_curve('DEPT', depth, unit='M', descr='Depth')
las.append_curve('GR', gr_data, unit='GAPI', descr='Gamma Ray')
las.write('output.las')

las = lasio.read("well.las")
las.append_curve('GR_NORM', las['GR'] / 150, unit='V/V')
del las.curves['BAD_CURVE']
las.well['WELL'].value = 'New Name'
las.write('modified.las')

# Ignore header errors
las = lasio.read("messy.las", ignore_header_errors=True)
# Check null value
null_val = las.well['NULL'].value  # Usually -999.25

import numpy as np
null_val = float(las.well['NULL'].value)
df = las.df().replace(null_val, np.nan)

from pathlib import Path
for path in Path('wells/').glob('*.las'):
    las = lasio.read(path)
    df = las.df()
    # Process...

- [ ] Read LAS file with `lasio.read()`, handle encoding if needed
- [ ] Inspect curves: `las.curves.keys()` and well headers
- [ ] Replace null values: `df.replace(null_val, np.nan)`
- [ ] Validate depth range and sample interval
- [ ] Check for missing curves or anomalous values
- [ ] Export to DataFrame with `las.df()` or write cleaned LAS