Geophysical Log Facility


The Geophysical Log Facility (GLF) is a repository for the geophysical data received from private donations, BEG research projects, and the Railroad Commission of Texas (RRC), which by law receives a copy of geophysical logs from every new, deepened, or plugged well drilled in Texas. These data are available for public viewing and copying, and include wireline electric logs, well records, and scout tickets from hundreds of thousands of wells located in Texas. Well data given by the RRC are also indexed on microfiche files.

Copies of log indexes and well logs are available. Logs are copied on continuous, prefolded paper and cost $2.75 per log + $.50 per linear foot + shipping and handling. Requests for copies can be made in person, by mail, telephone, fax, or email. Mail and fax orders can be made by using the preprinted GLF order form or download and print a PDF version. You will be sent an invoice for your order; cash, check, or credit card are accepted. Copies are sent Fourth Class Mail. First Class or FedEx Overnight service is available at additional cost.


The Integrated Core and Log Database (IGOR) is a searchable database for a large number of well logs and core holdings. Some Austin and Midland data are not currently included in IGOR.

IGOR is continually updated. If your search for data does not provide what you need, please contact James Donnelly via e-mail or telephone (512-471-0402).


Daniel Ortuño is the GLF manager. Please contact him for information about specific well data or to place an order. Telephone: (512) 471-7139; Fax: (512) 471-0140; e-mail

The GLF is located on the first floor of Bureau headquaters in Austin
and is open 8:00 a.m. to 5:00 p.m. weekdays. [Maps and directions]