Texas Formation Water Database

Published by the Texas Water Development Board - Report 157

The calculation of water saturation from electric logs usually requires an estimate for the resistivity of the formation water, or Rw.  There are a number of sources for saltwater chlorides data used in these electric log calculations - logging companies, producers, professional societies and other groups. One of the most complete sources of Rw data for the State of Texas is Report 157 published by the Texas Water Development Board (TWDB) in 1972.

This report assembled detailed chemical analyses of saline water from more than 15 sources, including private companies, previous publications and laboratory evaluations made by the TWDB in the course of their work.  A Survey of the Subsurface Saline Water of Texas, Volume 2, contains more than 3,500 water analyses. The tables include formation name, county, depth, pH, specific gravity and parts-per-million (ppm) contents for sodium, calcium, magnesium, chlorides, sulfate, bicarbonate, iron and H2S.  Although most of the samples have data on total solids, many of the listings do not contain details on the other ions and minerals.

Access the Texas Rw Database

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Anderson, Andrews, Angelina, Aransas, Archer, Armstrong, Atascosa, Austin

Bastrop, Baylor, Bee, Bell, Bexar, Borden, Bosque, Bowie, Brazoria, Brazos, Brewster

Briscoe, Brooks, Brown, Burleson, Burnet

Caldwell, Calhoun, Callahan, Cameron, Camp, Carson, Cass, Castro, Chambers, Cherokee

Childress, Clay, Cochran, Coke, Coleman, Collin, Collingsworth, Colorado, Comal, Concho

Cooke, Coryell, Cottle, Crane, Crockett, Crosby, Culberson

Dallam, Dallas, Dawson, Deaf Smith, Delta, Denton, DeWitt, Dickens, Dimmit, Donley, Duval

Eastland, Ector, Edwards, Ellis, El Paso, Erath

Falls, Fannin, Fayette, Fisher, Floyd, Foard, Fort Bend, Franklin, Freestone, Frio

Gaines, Galvestn, Garza, Glasscock, Goliad, Gonzales, Gray, Graysn, Gregg, Grimes, Guadalup

Hale, Hall, Hansford, Hardeman, Hardin, Harris, Harrison, Hartley, Haskell, Hays, Hemphill

Henderson, Hidalgo, Hill, Hockley, Hopkins, Houston, Howard, Hudspeth, Hunt, Hutchinson

Irion, Jack, Jackson, Jasper, Jeff Davis, Jefferson, Jim Hogg, Jim Wells, Jones

Karnes, Kaufman, Kendall, Kenedy, Kent, Kimball, King, Kinney, Kleberg, Knox

Lamb, Lampasas, La Salle, Lavaca, Lee, Leon, Liberty, Limestone

Lipscomb, Live Oak, Loving, Lubbock, Lynn

McCulloch, McLennan, McMullen, Madison, Marion, Martin, Matagorda, Maverick, Medina

Menard, Midland, Milam, Mitchell, Montague, Montgomery, Moore, Morris, Motley

Nacogdoches, Navarro, Newton, Nolan, Nueces, Ochiltree, Oldham, Orange

Palo Pinto, Panola, Parker, Parmer, Pecos, Polk

Randall, Reagan, Red River, Reeves, Refugio, Roberts, Robertson, Rockwall, Runnels, Rusk

Sabine, San Augustine, San Jacinto, San Patricio, San Saba, Schleicher, Scurry, Shackelford

Shelby, Sherman, Smith, Starr, Stephens, Sterling, Stonewall, Sutton, Swisher

Tarrant, Taylor, Terrell, Terry, Throckmorton, Titus, Tom Green, Travis, Trinity, Tyler

Upshur, Upton, Uvalde, Val Verde, Van Zandt, Victoria

Walker, Waller, Ward, Washington, Webb, Wharton, Wheeler, Wichita, Wilbarger, Willacy

Williamson, Wilson, Winkler, Wise, Wood

Yoakum, Young, Zapata, Zavala

Full database available

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