PROJECTS

The Amazon Prospect and Thames Prospect are located in the southern onshore part of Louisiana, 63 km from the Gulf Coast with a Tertiary sedimentary section that is greater than 7 km thick and extends over an area of greater than 600,000 sq km.

In the onshore part of the basin fluvial to shallow marine sedimentation dominate the Early Oligocene to Late Miocene section. The Oligocene aged Frio Formation and the Miocene age sandstones are prolific gas producing reservoirs in south Louisiana.

Growth faulting and salt tectonics have combined to create thick deposits of Early Oligocene to Late Miocene age sandstone reservoirs throughout the onshore region and structural traps to accommodate significant hydrocarbon accumulations.

Oligocene Play Fairway Model

Onshore south Louisiana contains an active, proven petroleum system involving marine source rocks and associated Tertiary clastic reservoirs. The proven hydrocarbon system extends right across the onshore state of Texas and into the offshore Gulf of Mexico.

Oligocene age sandstones of the Upper Frio Formation form the primary reservoir target in the Amazon Prospect and Thames Prospect. The sands were deposited in a fluvial to shallow marine environment and they form the primary reservoir for many of the hydrocarbon fields in the area.

Oligocene and Early Miocene shales of the Upper Frio and Anahuac formations form proven lateral and top seals for the primary reservoir targets. Many of the existing fields are controlled by faults and they therefore have demonstrated the effectiveness of the regional seals. A critical risk for the fault traps is fault reactivation which may cause breaching of the trap after it has been charged with gas. It should be noted that many of the gas fields are tilted fault blocks that have undergone fault reactivation but have still retained effective fault seal.

A wide range of structural traps and structural / stratigraphic traps exist throughout the region due to the tectonic history of the basin. The majority of fields in the area are either salt induced structures or fault dependent anticlines. The two prospects fall into the later trap type. Regional mapping at the Camerina A Horizon of the Upper Frio Formation shows that the prospects are on trend and have a similar structural trapping style to the adjacent fields.

1.1 Amazon Prospect

The Amazon Prospect is a fault dependent anticline with the major faults located down flank from an anticlinal crest with minor faulting. The mapping at the Top Reservoir Horizon shows time and depth closure. It is 12.4 sq km in area and has 120m of relief.

Amazon Prospect Time Structure Map

Depth conversion of the time structure map was completed using a constant Average Velocity of 2,517 m/sec, which is consistent with regional velocity control.

Amazon Prospect Depth Structure Map

The primary reservoir for the Amazon Prospect is the Oligocene Sandstone that is currently producing from the adjacent fields. Secondary reservoirs are likely to occur in the Camerina Sands as seen in another adjacent field.

The 3D seismic data over the Amazon Prospect shows high amplitudes throughout the reservoir section. The amplitude anomaly may represent good reservoir development and possibly the presence of hydrocarbons.

Amazon Prospect 3D Seismic Dip Line

Amazon Prospect 3D Seismic Strike Line

1.2 Thames Prospect

The Thames Prospect is also located in the southern onshore part of Louisiana just south of the Amazon Prospect.

The Thames Prospect is a fault dependent anticline with the major faults located at the crest of the structure. It is 1.21 sq km in area and has 335m of relief.

Thames Prospect - Top Reservoir Depth Structure Map

Amplitude extraction at the Top Reservoir Horizon shows a high amplitude anomaly at the crest of the Thames Prospect.

Thames Prospect - Amplitude extraction with Top Reservoir Depth Contours

The determination of the P10 area for the Thames Prospect was calculated from the Amplitude Extraction Map of the Purple Horizon which shows high amplitude over the flank of the Thames Prospect.

Thames Prospect - Amplitude extraction with Top Reservoir Depth Contours

The seismic calibration for the interpretation over the Thames Prospect is provided by a tie to an unnamed adjacent well.

The primary reservoir for the Thames Prospect is the Oligocene Sandstone that is currently producing from adjacent fields. Secondary reservoirs are likely to occur in the Camerina Sands as seen in another adjacent field.

The 3D seismic data over the Thames Prospect shows high amplitude throughout the reservoir section. The amplitude anomaly may represent good reservoir development and possibly the presence of hydrocarbons