SPE Young Professionals meeting, March 24, 2016

Thursday, 25 February 2016 Read 2965 times
Rate this item
(0 votes)
  • Start Time: Thursday, 25 February 2016, 19:00
  • Event Type: Conference

We invite you to SPE young professionals meeting on "A case study of petrophysical model evaluation in unconsolidated heavy oil sands.". by Yan Pormeyster, South Oil Company, Astrakhan.

Please click here to download presentation. Access for SPE members only.

Join SPE

 

Meeting will take place on 24 March, Thursday, at 1900 hours at Sushchevskiy val, 2, Moscow.

 

Preliminary registration is required!

 

Please reserve a place and send your full name (including middle name), company and job title to This email address is being protected from spambots. You need JavaScript enabled to view it.. You will have a confirmation after you’re registered.

 

Looking forward to seeing you!

 

More details about the topic

A petrophysical model of unconsolidated sandstone reservoir described. The reservoir pore space filled with high viscous oil (up to 4000 sP). Intrinsic permeability varies from hundreds to thousands of milli-Darcies. There is no evidence of vertical heterogeneity or bedding on the core or well log analysis. Vertical resistivity gradient observed in a bottom part of the formation, which one may interpret as fluid transition zone formed by capillary forces. This transition zone means the presence of movable water below the oil zone.

 

Such geological conditions with the absence of barriers to vertical fluid migration and high oil-water mobility ratio it is easy to suppose early water breakthrough from free water zone to the perforated interval. Nevertheless, more than a year of production does not show a significant increase in water cut caused by early water breakthrough. Therefore, the assumption of the presence of movable water in a vicinity of the perforated interval, the correctness of current petrophysical model and well log interpretation is questioned and needs revision.

 

A detailed core and well log analysis shows a possible presence of sedimentary transition zone in a bottom part of the reservoir. This transition zone control formations petrophysical properties and fluid flow regime. Proposed transition zone has very low contrast with the other parts of the reservoir and cannot easily see on gamma ray and porosity logs. This is the evidence of pore throat radius as the main driver for petrophysical properties change.

 

A revised petrophysical model take into account particular properties of pore structure and gradient change of irreducible water saturation from top to bottom within the reservoir. This model can explain the facts of production history and help to update reservoir hydrodynamic model.

About author

 

Yan Pormeyster, South Oil Company, Astrakhan

 

Yan graduated from Tyumen Oil and Gas University in 2002. His background is Oilfield exploration geophysics. From the beginning of his career, Yan worked on core analysis, petrophysical modelling and well log analysis in different parts of Russia. Now Yan is deputy chief geologist. His responsibility is mid- and long-term strategic planning and execution control of field exploration and research programs.

 

Member of SPE since 2015.

Yan expertise is petrophysical modeling, well log processing and interpretation.

Leave a comment

Make sure you enter the (*) required information where indicated. HTML code is not allowed.