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Bowleven provides update on block MLHP-5, Etinde Permit


Published Aug 2, 2011
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Bowleven commences drilling of IF-1r exploration well

Bowleven provided the following update on activities on block MLHP-5, Etinde Permit, offshore Cameroon.

Sapele-2 test update

The principal objective of Sapele-2 was to appraise both the Lower and Deep Omicron discoveries encountered in the Sapele-1 exploration well.

As previously announced, the Sapele-2 well encountered log evaluated net pay of approximately 19 metres and 16 metres within the Deep Omicron and Lower Omicron intervals respectively. The well was drilled to a TD of 3,749 metres in water depths of around 25 metres approximately five kilometres south west of the original Sapele-1 vertical well.

The results of the three drill stem tests (DSTs) performed at Sapele-2 are outlined below:

Deep Omicron

DST1

The basal sand situated on top of the cross-cut event, encountered at Sapele-1 and Sapele-1ST but not tested, flowed light oil on test at Sapele-2, the first hydrocarbon flow from this interval. A peak flow rate of 381 boepd, comprising 233 bopd of light oil and 0.89 mmscfd of associated gas on a 12/64 inch choke was produced. Whilst no MDT data was acquired to confirm connectivity, all three wells have log evaluated net pay at this level and based on seismic correlation, the interval can be mapped between all three wells and over a wide area.

DST2

A peak rate of 2,738 boepd, comprising 1,818 bopd of light oil and 5.52 mmscfd of associated gas on a 32/64 inch choke was produced. Reservoir pressure was seen to re-charge over the period of the DST, inferring a wider hydraulic system. Based on initial log evaluation, lower productivity was encountered on test than anticipated, potentially due to formation damage sustained during drilling activities.

Light oil ranging from 39 to 42 degree API was produced from the two DSTs performed in the Deep Omicron interval. The Sapele-1 well had a confirmed oil pressure gradient at Deep Omicron and oil samples were obtained during logging activities. The oil quality, gas-oil ratio and pressures measured on test at Sapele-2 are comparable to the samples and pressures taken at Sapele-1. DST pressures, the log correlation between wells and seismic interpretation infer a laterally extensive Deep Omicron system. Pressure communication between Sapele-1 and Sapele-2 at an individual reservoir level cannot be confirmed given the inability to acquire MDT data due to borehole conditions.

Lower Omicron

DST3

The interval flowed gas at rates of up to 3.1 mmscfd, the first hydrocarbon flow from this interval, however testing operations were curtailed due to a pressure leak in the test string. Consequently, although liquids were present their flow rate was not recorded.

Tags: Bowleven




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