Roxi has updated the market with news of its initial testing at Shallow Well 141 and the preparatory work for new shallow Well 142 together with an update on Deep Well A6.
Roxi has a 58.41% interest in the BNG Contract Area, which is located in the west of Kazakhstan 40 km southeast of Tengiz on the edge of the Mangistau Oblast, covering an area of 1561 km2 of which 1376 km2 has 3D seismic coverage acquired in 2009 and 2010.
In January 2016, Roxi announced that the area of the Contract Area was extended with the addition of 140.6 km2 to the north-east of the current block. The extended BNG Contract Area now covers 1702 km2.
The block has both shallow and deep areas of interest.
Roxi is interested in two shallow regions of the BNG block, (1) Yelemes, which include producing wells 54, 805, 806 & 807 and (2) MJF structure, which include producing well 143 and now producing Well 141.
To date Roxi has drilled 5 shallow wells to typical depths of 2500 m. In aggregate the wells have produced up to 1100 bpd (642 bpd net to Roxi) on test and all of the wells are considered to be commercially successful.
On 2 September 2016 we published a reserves update from Gaffney Cline & Associates, derived solely from our shallow fields which, based on 100% economic interest, was:
(P90) Proved reserves of 18.3 million bbls
(P50) Proved and Probable of 29.3 million bbls
(P10) Proved, Probable & Possible reserves 45.0 million bbls
These take no account of any reserves from our deep sub-salt drilling success.
MJF structureWell 143
Well 143, which was drilled in 2013 has to date been the best performing of Roxi's shallow wells. Recently production from this well increased to some 630 bopd following the switch from a 5 mm choke to a 7 mm choke. The current production rate is 500 bpd using a 5 mm choke.Well 141
At Well 141, which is located some 1200 m to the southwest of Well 143, drilling commenced in August 2016, initially targeting Jurassic Callovian sands at a depth of 2200 m.
The well was drilled to a Total Depth of 2500 m on a turnkey basis at a total cost of US$1.25 million.
The well was perforated over six-meters at between of 2230 & 2236 m and early flow test results indicate the well to be producing at the rate of 220 bpd using a 3 mm choke and 480 bpd using a 5 mm choke. Further testing is planned including an extended production test.
The rig used for 141 is being moved to drill Shallow Well 142, which is also to be drilled on the MJF structure but this time some 1600 m to the north-east of Well 143. Drilling Well 142 is expected to commence in the next few weeks and be completed well before the year-end.
This well is also to be drilled on a turn-key basis for US$1.25 million to a Total Depth of 2500 m.
The principal reason for drilling Wells 141 and 142 is to seek to prove the extent of the MJF structure, which, if successful, should increase reserves.Deep Wells
Our deep drilling exploration has to date been contained in the Ayrshagyl portion of the BNG block which extends over an area of some 120 km2, where we have drilled three deep wells, A5, 801 and A6 to depths of 4442, 5050, and 4528 m respectively.Deep Well A6
Deep Well A6 was spudded in November 2015, targeting the same structure as Deep Well A5 in the Middle and Lower Carboniferous, with an original target Total Depth of 4750 m.
Based on the analysis of mud logs we decided to complete the well at a depth of 4528 m. Although mud-logs are only preliminary, they suggest Deep Well A6 has penetrated oil bearing intervals.
A further announcement will be made after the completion and analysis of a wire-line log subject to which we expect to conduct flow testing.
Clive Carver, Executive Chairman said
We believe the successes at Well 141 indicates the MJF structure extends over a considerable area.
At A6 we have managed the very challenging drilling of the well better than with Deep Wells A5 and 801 and accordingly will better placed to move to flow testing in due course.
Read the article online at: https://www.oilfieldtechnology.com/drilling-and-production/19102016/roxi-petroleum-plc-provides-operational-update/