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Oilex achieves steady light crude flow at Cambay-77H hydraulic fracture well onshore India

04th August 2014

Oilex has announced that Cambay-77H well continues to produce crude oil and frac water and around 55 per cent of the water used to stimulate the well has been recovered

Oilex achieves steady light crude flow at Cambay-77H hydraulic fracture well onshore India
'The on-going recovery of light crude oil during flow-back operations is particularly welcome' - Miller, Oilex

Light crude oil continues to be recovered and most has been transported to a nearby refinery for sale. Gas produced concurrently with crude oil during well flow-back continues to be flared to ensure safety of all well-site personnel.

“The on-going recovery of light crude oil during flow-back operations is particularly welcome,” said Ron Miller, Oilex managing director. “Flow-back started very strongly and continues at a steady pace, although the shut-in periods for changing the frac tree and checking the well bore have extended the duration. As this is the first multi-stage fracture stimulated well to flow-back in the Cambay Basin, there is no benchmark for comparison. Oilex looks forward to commencing the production testing after sufficient frac fluids have been recovered from the well and the flow has stabilised.”

No proppant has been recovered at surface subsequent to the milling operations and initial well bore clean out. No evidence of formation water has been seen at surface during the flow-back and this is interpreted to support Oilex’s hypothesis that formation water production is not occurring.

The well planning including flow-back and clean-up was predicated upon gas and condensate and the recovery of crude oil and gas may influence the duration required for Cambay-77H to clean-up prior to commencement of any production testing. Samples of the oil, gas and water have been collected for laboratory analysis. These analyses will assist in determining the fluid properties being recovered from the well.

During flow-back operations, several activities necessitated shutting in the well or limiting the flow. These were the change of frac tree to the standby frac tree because of leak issues, the completion of two runs to the toe of the well with the coiled tubing unit, and preliminary build-up surveys of wellhead pressure.

The coil tubing unit, which was retained at Cambay-77H site as a precaution, has now been demobilised along with other ancillary equipment, reducing the daily operating costs.  Oilex will advise the market of a stabilised flow rate via a production test once frac fluid return and clean-up operations have been completed.

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