You are here

Alvopetro makes oil discovery in the Recôncavo Basin onshore Brazil

26th August 2014

Alvopetro Energy has announced an oil discovery and positive on-going results from the first of three zones to be tested at its 197(1) well, onshore north-eastern Brazil

Alvopetro makes oil discovery in the Recôncavo Basin onshore Brazil
Alvopetro’s 197(1) well reached a total depth of 3,275 metres, and encountered 43 metres of potential net hydrocarbon pay over several separate intervals

"The strong demand for natural gas and high energy prices in north-eastern Brazil place us in an excellent position to commercialise our discovery," said Corey C. Ruttan, Alvopetro president and chief executive officer. "The successful results, from the first of three zones to be tested in our 197(1) well, are a significant step forward in proving the commercial viability of our Gomo resource opportunity. We are optimistic about this gas opportunity, which potentially spans a large area, and we anticipate encountering this lower interval in our 183(1) well that is currently being drilled."

Alvopetro’s 197(1) well reached a total depth of 3,275 metres, and encountered 43 metres of potential net hydrocarbon pay over several separate intervals, with an average porosity of 9.5 per cent, using an eight per cent porosity cut-off.

Given the geological potential displayed in mud-logging and open-hole logs, Alvopetro determined to initially test the productivity of three intervals discovered at 197(1) well.

Alvopetro perforated and completed the deepest sandstone interval, at 3,175 - 3,184 metres, which, based on our petrophysical analysis, is representative of four analogous uphole intervals in the same zone.

Over a 67 hour test, the 197(1) well flowed natural gas, on an un-stimulated basis, at an average rate of 40 mcf/day, with no water, on an 8/64" choke, using 2 7/8" tubing, from the Gomo member of the Candeias Formation.

Cumulatively, the well produced 112 mcf of natural gas for the duration of the test. The initial wellhead pressure at commencement of the 67 hour test was 159 psi(g) and increased to 213 psi(g) at the end of the test.

The well will be shut-in to measure reservoir pressure and obtain pressure build-up data to undertake a pressure transient analysis. This will allow Alvopetro to predict what this zone could produce on a stimulated basis.

After completing the pressure build-up test, the zone will be temporarily suspended with a retrievable bridge plug and the completion will proceed up-hole to test the primary target, consisting of a continuous, thick, tight sand within the middle Gomo member, with a large mapped aerial extent.

The third interval to be tested is a more conventional sandstone interval with 20 metres of potential net pay with greater than eight per cent porosity. Based on open-hole logs, this zone has petrophysical characteristics similar to the Bom Lugar-1 producing well which had an initial un-stimulated production rate of over 500 bopd and has cumulatively produced over 285,000 barrels of oil.

Alvopetro will continue the evaluation of the 197(1) well and we have procured surface production equipment to facilitate long-term production testing of any of the productive intervals in this well, pending customary approvals from the ANP.

Related topics: 

Got a news tip? Email news@oilandgastechnology.net