Customer’s problem
Expro’s customer Dana Gas is responsible for South Abu El Naga 2 in Egypt, a gas well with high potential but which had not seen hydrocarbon shows during the drilling phase ever before. Expro was approached to provide a fast and safe method of evaluating the potential of this hydrocarbon show in the extremely shallow Wastani formation, which was only 910 meters deep, under the constraint of a client limitation of 2,000 psi annulus pressure.
Expro’s solution
Based upon a proposed Drill Stem Testing (DST) bottomhole assembly, a generic testing programme was submitted for Dana Gas to review. As part of the programme Expro would provide downhole data from their memory gauges, allowing Dana Gas to determine the potential of the formation. Once they confirmed that they were happy with the proposal the equipment and crew were mobilised to the rig site. Having discussed running procedures and reviewing risk analysis, the first sub-assembly of packer, safety joint and jar was made up onto the TCP assembly and run into the well.
Results
To start the DST, pressure was applied to the annulus to open the pressure operated tester valve, with the tubing pressure immediately rising by 40 psi. After a short clean up flow period, flow rates of 6mm scf/day at 1,250psi were realised. Following a two hour closed-in period to collect the initial formation pressure build-up data, a 32 hour extended flow period was initiated. With the DST back on surface, the memory gauge data for all four gauges was verified and downloaded.
The data delivered from the DST enabled Dana Gas to confirm that they had found another producing zone. Dana announced that they had encountered 16.6 meters of net pay in the South Abu El Naga-2 well and 4.8 meters of net pay in a good quality sandstone reservoir of the El Wastani formation.
Technologies used
Expro’s DST capabilities within Egypt were utilised for this job. A DST bottomhole assembly was delivered to Dana Gas, including a 9 5/8” JS-2A Retrievable Packer, Safety Joint, right hand set Hydraulic Jar, Tubing Tester Valve, Pressure Operated Tester Valve and a Multi-Reverse Spot Tool. Expro’s core DST tools have a track record that has been proven over the past 20 years. The addition of new DST tools means that Expro can provide integrated solutions across the Exploration and Appraisal phase of any well.
Expro’s DST capabilities leads to gas discovery in Egypt
Customer’s problem
Expro’s customer Dana Gas is responsible for South Abu El Naga 2 in Egypt, a gas well with high potential but which had not seen hydrocarbon shows during the drilling phase ever before. Expro was approached to provide a fast and safe method of evaluating the potential of this hydrocarbon show in the extremely shallow Wastani formation, which was only 910 meters deep, under the constraint of a client limitation of 2,000 psi annulus pressure.
Based upon a proposed Drill Stem Testing (DST) bottomhole assembly, a generic testing programme was submitted for Dana Gas to review. As part of the programme Expro would provide downhole data from their memory gauges, allowing Dana Gas to determine the potential of the formation. Once they confirmed that they were happy with the proposal the equipment and crew were mobilised to the rig site. Having discussed running procedures and reviewing risk analysis, the first sub-assembly of packer, safety joint and jar was made up onto the TCP assembly and run into the well.
Results
To start the DST, pressure was applied to the annulus to open the pressure operated tester valve, with the tubing pressure immediately rising by 40 psi. After a short clean up flow period, flow rates of 6mm scf/day at 1,250psi were realised. Following a two hour closed-in period to collect the initial formation pressure build-up data, a 32 hour extended flow period was initiated. With the DST back on surface, the memory gauge data for all four gauges was verified and downloaded.
The data delivered from the DST enabled Dana Gas to confirm that they had found another producing zone. Dana announced that they had encountered 16.6 meters of net pay in the South Abu El Naga-2 well and 4.8 meters of net pay in a good quality sandstone reservoir of the El Wastani formation.
Technologies used
Expro’s DST capabilities within Egypt were utilised for this job. A DST bottomhole assembly was delivered to Dana Gas, including a 9 5/8” JS-2A Retrievable Packer, Safety Joint, right hand set Hydraulic Jar, Tubing Tester Valve, Pressure Operated Tester Valve and a Multi-Reverse Spot Tool. Expro’s core DST tools have a track record that has been proven over the past 20 years. The addition of new DST tools means that Expro can provide integrated solutions across the Exploration and Appraisal phase of any well.