... Interessant heute dieser Beitrag eines users "koko":
"jb,
Does anybody know of any other wells/location of similar size flow-rates ?? Yes
The Sidi Dhaher discovery encountered a thick, porous and permeable Bireno reservoir of upper Cretaceous age overlaid with an 80 m sealing shale section.
Subsequent down hole pressure measurements and sampling confirmed the presence of an oil column.
The Bireno Reservoir is where ADX has discovered there oil column here are a few examples of flow rates from Bireno in the near-by Sfax locations
BIRENO FINDS, DEVELOPMENTS
After two discoveries of the 1970s at Miskar (1974) and Mahares (1978), the beginning of the 1980s was encouraging with three more discoveries on stream.
The 1 Gremda, drilled in 1980 by Houston Oil, found oil and gas in Bireno carbonates at 2,718-42 m. The well flowed 1,360 b/d of 38 gravity oil on a short test, but the test was suspended when hydrogen sulfide was detected.
The 1 Guebiba, drilled in 1981 by Houston Oil on a faulted structure, reached the Bireno reservoir at a depth of 2,804 m. The net pay was 4.5 m thick, and the well flowed 1,700 b/d of 34 gravity oil and 86.7 MMcfd of gas.
The 1 El Ain, drilled in 1982 about 2 1/2 km southwest of 1 Gremda, encountered 29.5 m of net Bireno pay at 2,570 m. A long term test flowed 2,550 b/d of 40 gravity oil and 1.2 MMcfd of gas.
These discoveries were left undeveloped due to low oil and gas prices in the late 1980s, and consequently the Bireno carbonates remained a secondary target until 1 El Ain was brought on production.
Encouraged by the good performance of the reservoir, British Gas upgraded again the Bireno carbonates as a primary target and drilled 1 Rhemoura. The well, situated 5 km southeast of 1 El Ain, reached the top of Bireno at 2,873 m and encountered a net pay of 53 m that tested 7,600 b/d of 35 gravity oil.
BIRENO RESERVOIR CHARACTERISTICS
Most of the discoveries within the Bireno reservoir are located in the Sfax region, which is characterized by widely varying structural types.
These include tilted fault blocks, graben edge plays, related stratigraphic traps, depocenters, and anticlines not yet drilled or not drilled deep enough to reach the Turonian-Cenomanian facies.
In the wells of the Sfax area, the reservoir corresponds principally to the Upper Bireno carbonates.
The Bireno member includes medium to high energy limestones and low energy fine limestones relatively porous due to dissolution in addition to porous dolomitized rocks.
The Lower Bireno, as thick as 150 m, is composed at the base of lime-mudstones and wackestones being partly dolomitized and containing rudist debris and benthonic forams. They locally exhibit fractures cemented by calcite or containing oil shows. They are also affected by dissolution leading to the development of vuggy porosity."
Und von Japetus auf w:o die Quelle, die koko nicht angegeben hat:
www.ogj.com/articles/print/volume-89/issue-51/in-this…
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