shestero / pglas

Read LAS 2.0 (well logging file) in PostgreSQL

pglas

PostgreSQL extension to read LAS 2.0 (well logging file).

Note: LAS files are: https://en.wikipedia.org/wiki/Log_ASCII_standard . Please, don't confuse with LIDAR files with the same extension!!

Supports only version 2.0 of LAS Specification. For more information about this format, see the Canadian Well Logging Society.

Functions:

• las_na(file) - shows N/A value;
• las_curves(file) - return enumerated curve names;
• las_curve(file, curve) - return coupled values from the DEPT curve (expected to be first) and specific curve.

Example:

~/pglas$ cargo pgrx run
...
pglas=# create extension pglas;
CREATE EXTENSION

pglas=# select las_na('/home/.../lasrs/sample/A10.las');
 las_na  
---------
 -999.25
(1 row)

pglas=# select * from las_curves('/home/.../lasrs/sample/A10.las');
 IDX |     CURVE     
-----+---------------
   0 | DEPT
   1 | Perm
   2 | Gamma
   3 | Porosity
   4 | Fluvialfacies
   5 | NetGross
(6 rows)

pglas=# select * from las_curve('/home/.../lasrs/sample/A10.las','Gamma');
   DEPT   |    VAL    
----------+-----------
 1499.879 |          
 1500.129 |          
 1500.629 |          
 1501.129 |          
 1501.629 | 78.869453
 1502.129 | 78.008301
 1502.629 | 75.581558
 1503.129 | 73.238037
 1503.629 | 71.504173
 1504.129 | 71.459229
 1504.629 |   73.4478
...

See also: https://en.wikipedia.org/wiki/Well_logging