The consortium formed by Sierra Oil and Gas, Talos Energy and Premier Oil discovered a gigantic light oil field in shallow waters 60 kilometers off the coast of Tabasco, the first hydrocarbon deposit found by a private agent in Mexico after nearly 80 years of state oil monopoly, Talos Energy, the operator of the project, reported petroleumworld.com.
It is a mega deposit found through the drilling of the Zama-1 well, to a water depth of 166 meters deep, with an initial estimate of resources quantified in the range of 1.4 billion to 2 billion barrels of oil Crude oil equivalent, making it the largest discovery in Gulf of Mexico waters since 2000 and the fifth largest in the world in the last five years, according to the company.
The preliminary volume of resources of the deposit makes it equivalent to twice the size of Trion, three times that of Ayin - where Pemex looks for its second farmout - and similar to the magnitude of Ayatsil (that forms part of the mega complex Ku Maloob Zaap). In addition, the quantification proved to be vastly superior to the original expectation of finding, which was in a range of 100-500 million barrels of crude oil equivalent.
The site was identified in a net interval of 335 meters in the Upper Miocene, with an effective interval of 170 to 200 meters. It primarily contains light crude (with a quality of between 28 and 30 degrees API), in addition to associated gas, Talos said in a statement.
Zama-1 is located in Block 7, which was one of two awards awarded by the consortium of Mexico's Sierra Oil and Gas, the US-based Talos Energy and the British Premier Oil in the first phase of Mexican Round One on July 15, 2015. Talos is the operator of the well and holds a 35% stake in the joint venture, for 40% of Sierra and 25% of Premier. The drilling of Zama-1 - the first of a private type after nearly eight decades of state oil monopoly in Mexico - began May 21 through the Ensco 8503 platform, finding it on July 2, 55 days later Of work started.
The company said it is installing a coating to protect discovered resources prior to the search for deeper exploratory targets and it is too early to project start-up operations. "There are no plans for immediate testing at the well. An additional assessment will be needed to calibrate the well with the existing reprocessed seismic information to determine future plans and the following locations that will define the extent of the discovered resources.“
"We are excited to move forward with the evaluation of this discovery and continue to drill more unique opportunities like this. We see a bright future for shallow Mexican waters over the next few years, "added Tim Duncan.
In the last two years, Petróleos Mexicanos has reported the discovery of 10 oil fields in shallow and deep waters of the Gulf of Mexico, four in 2015 and six last year; however, the sum of estimated resources of these assets does not add up to half the preliminary amount of Zama-1.