Waterflood Analysis with Pulse-Code Pressure Interference Testing in Eastern Siberia Carbonate Reservoirs
- Vasiliy Kim (Irkutsk Oil Company) | Artur Aslanyan (Nafta College) | Danila Gulyaev (Sofoil) | Rushana Farakhova (Sofoil)
- Document ID
- Society of Petroleum Engineers
- SPE Europec featured at 82nd EAGE Conference and Exhibition, 8-11 December, Amsterdam, The Netherlands
- Publication Date
- Document Type
- Conference Paper
- 2020. Society of Petroleum Engineers
- 5.4 Improved and Enhanced Recovery, 5 Reservoir Desciption & Dynamics, 5.7 Reserves Evaluation, 2.3 Completion Monitoring Systems/Intelligent Wells, 5.8 Unconventional and Complex Reservoirs, 5.7.2 Recovery Factors, 1.6 Drilling Operations, 5.8.7 Carbonate Reservoir, 1.6.6 Directional Drilling, 2 Well completion, 2.3.2 Downhole Sensors & Control Equipment, 5.4.1 Waterflooding
- pressure pulse-code testing, connectivity, carbonate, waterflood, interference testing
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- 39 since 2007
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The waterflood performance depends on two major components: the sweep efficiency and displacement efficiency.
The sweep efficiency depends on proper understanding of the vertical and lateral distribution of reservoir properties.
One of the methods to check and calibrate this understanding is to perform pressure interference test (PIT) in few cross-well intervals.
Unfortunately, a proper implementation of traditional step-response PIT with objective for quantitative interpretation requires shutting-down the wells, preferably the whole area around receiving well resulting in punishing production deferment.
This was a bottle-neck for wide spread of quantitative PIT for many decades.
This paper describes the experience with a specific implementation of PIT – Pressure Pulse Code Test (PCT) – which allows data acquisition under scheduled production.
The trade-offs are usually acceptable: longer field operations, high resolution downhole gauges, more complex and longer data processing, advanced software tools and as result – a more expensive service, which anyway comes much cheaper than production deferment.
The paper shows how PCT can be qualified using the synthetic field tests and real field tests and shows a typical application of PCT findings in one of the Eastern Siberian carbonate reservoirs.
|File Size||1 MB||Number of Pages||12|
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