The company plans to perform a three- to six-month extended production test starting in third-quarter 2017, following the completion in April of a light oil resource volume assessment, to help determine the commerciality of the discovery.

The first DST flowed from an 18 m interval at a maximum rate of about 4,500 barrels of oil per day on a 60/64-in. choke. For the second DST, an additional 8.5-m zone was added, and the well flowed at a maximum rate of 4,200 bbl/d.

ExxonMobil, Guyana, Payara, oil, Liza, offshore, discovery

To better gauge resource potential, ExxonMobil said the discovery is being evaluated with two sidetracks drilled. A well test is underway.

Gulf of Mexico, W&T Offshore, oil, discovery, Mahogany

Advanced seismic data helped the company discover additional pay.

A test conducted with an electric submersible pump in the Guadalupe Formation across multiple sand units resulted in a production rate of about 1,800 barrels of oil per day (bbl/d) of 16 degrees API, with a 17% water cut through a choke of 38/64 mm and wellhead pressure of 80 pounds per square inch, the company said.

Drilled to a total depth of 144,350 meters (m), the Zohr 5x well encountered a continuous hydrocarbon column of about 180 m. The results confirm Zohr’s potential of 30 Tcf original gas in place.

GeoPark said the well was drilled 780 m north of the Jacana 3 appraisal well further down dip to a bottom-hole location below the previous lowest-known oil, where it hit oil in the Guadalupe Formation.

Drilled to a depth of 3,860 ft, IOG said good quality reservoir condition samples were collected from the field and sent to Aberdeen for further analysis.

Cairn Energy, Senegal, SNE, offshore, oil, gas, reservoir

The company is preparing for a third phase of exploration and appraisal drilling.

Tests showed a crude oil flow rate of 2,406 barrels per day, Sonatrach said in a statement.

A stabilized gas flow rate of 17 MMscf/d was reached on Aug. 7, the company said, noting the results “represents a highly commercial rate.”

The total oil in place in the Upper Portland pay has increased from 7.7 MMbbl per square mile to 22.9 MMbbl per square mile.