The East Texas oil field, as the name implies, is located in the extreme eastern part of Texas. The discovery of this field was made on October 3, 1930, by C. M. Joiner et al. The field has produced 1,512 million barrels of oil to September 1, 1940. At the present time (October, 1940) the field is restricted to a flow of 2.32 per cent of the hourly potential, with a minimum allowable of 20 barrels per day per well. There were approximately 9,600 producing wells on January 1, 1933.(FOOTNOTE *) Estimates of the total production vary from 4 billion to 6 billion barrels. The actual potential production of this field is estimated to vary from 2 million to 4 million barrels per day. A total of 30,000 wells will probably be drilled, representing a total drilling investm nt of $400,000,000 to $500,000,000. The field comprises approximately 130,620 acres, and covers portions of Rusk, Cherokee, Smith, Gregg, and Upshur counties. The production is derived from sand members of the Eagle Ford-Woodbine group, of Cretaceous age. The structure of the reservoir is a broad, westward-dipping, truncated homocline.