Bulletin Article

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Thirty-seven mudstone samples were collected from the uppermost Lower Mudstone Member of the Potrerillos Formation in El Gordo minibasin within La Popa Basin, Mexico. The unit is exposed in a circular pattern at the earth's surface and is intersected by El Gordo diapir in the northeast part of the minibasin. Vitrinite reflectance (Ro) results show that samples along the eastern side of the minibasin (i.e., south of the diapir) are mostly thermally immature to low maturity (Ro ranges from 0.53% to 0.64%). Vitrinite values along the southern, western, and northwestern part of the minibasin range between 0.67% and 0.85%. Values of Ro immediately northwest of the diapir are the highest, reaching a maximum of 1.44%. The results are consistent with two different possibilities: (1) that the diapir plunges to the northwest, or (2) that a focused high-temperature heat flow existed along just the northwest margin of the diapir. If the plunging diapir interpretation is correct, then the thermally immature area south of the diapir was in a subsalt position, and the high-maturity area northwest of the diapir was in a suprasalt position prior to Tertiary uplift and erosion. If a presumed salt source at depth to the northwest of El Gordo also fed El Papalote diapir, which is located just to the north of El Gordo diapir, then the tabular halokinetic sequences that are found only along the east side of El Papalote may be subsalt features. However, if the diapir is subvertical and the high-maturity values northwest of the diapir are caused by prolonged, high-temperature fluid flow along just the northwestern margin of the diapir, then both of these scenarios are in disagreement with previously published numerical models. This disagreement arises because the models predict that thermal anomalies will extend outward from a diapir a distance roughly 1.5 times the radius of the diapir, but the results reported here show that the anomalous values on one side of the diapir are about two times the radius, whereas they are as much as five times the radius on the other side of the diapir. The results indicate that strata adjacent to salt margins may experience significantly different heat histories adjacent to different margins of diapirs that result in strikingly different diagenetic histories, even at the same depth.

Energy Policy Blog

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Energy Policy Blog

In order to create political influence among countries in the Central American and Caribbean region, Hugo Chavez, the late President of Venezuela, created an energy alliance called Petrocaribe in 2005.

Explorer Article

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Explorer Article

A comprehensive look at Mexico's revolutionary energy reforms.

Explorer Emphasis

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Explorer Emphasis Article
“These days, shows like The Big Bang Theory seem to pass for science content.” That’s Scott Sampson, one of this year’s AAPG Geosciences in the Media Award winners.
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This year, URTeC has added an enhanced preview of “Coming Attractions.” In addition to looking at established plays, URTeC will provide significant information about emerging unconventional resource possibilities in North America and around the world.
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Winning Hearts and Minds: Colombia and Latin American prospects offer high promise and difficult hurdles in the form of local political and public resistance.

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Amid the backdrop of a comparatively soft market for the seismic industry in the coming year or so, oil and gas producers are watching Mexico with considerable expectation after the country passed historic constitutional reforms late last year to end the 75-year-old state monopoly on Mexico’s abundant oil and gas resources.

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Seismic Outlook: After several years of plenty, 2014 is expected to be a comparatively lean year for the seismic industry, a few localized hot-spots around the world notwithstanding.

Explorer Foundation Update

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Explorer Foundation Update

It has a new name, a new energy and a new lineup of experts, all primed to spread geoscience knowledge around the world. “It” is AAPG’s newly named Global Distinguished Lecture Program – emphasis on the “global” – which dates back to 1941 but continues to be the Association’s flagship initiative for offering the latest in geologic science to AAPG affiliated geological societies and universities.

Learn! Blog

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Learn! Blog

Mexico has six basins that produce oil and gas, and tremendous offshore, deep Gulf of Mexico resources. There is also shale potential in formations that extend south from the South Texas Eagle Ford. Still, according to statistics released by Pemex, Mexico’s oil and gas production has declined 25% since the 1980s. The problem has stemmed partially from a lack of investment, and difficulties in implementing new technologies to explore for and develop resources.

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