This paper has been prepared to show the general distribution of the oil fields in Mexico, their production to date, and the probable reserves expected from the known fields.

The most important prospective areas for the discovery of new oil fields in Mexico are in the Coastal Plain of the Gulf of Mexico.

Mexico's oil production comes from three main provinces that can be arranged in the following order according to the amount of oil produced and their importance to the development of the oil industry in Mexico.

1. Tampico-Tuxpan oil fields
2. Isthmus oil fields
3. Northeastern Mexico

To December 31, 1947, the Tampico-Tuxpan oil fields produced 2,171 million barrels, which amounts to 94 per cent of the total cumulative production. The Isthmus area, second in importance, has produced 148 million barrels, which accounts for the remaining 6 per cent. Northeastern Mexico has not produced any commercial oil so far, but some gas fields have been developed there and Petroleos Mexicanos has recently brought in the first two commercial oil wells discovered in that area. These oil wells will be put in production as soon as transportation facilities are developed.