«Oil and Gas Horizons» Moscow 2014 Russian State Geological Prospecting University MGRI – RSGPU Faculty of exploration and mining technologies Department of modern drilling technology Postgraduate student: Ramil Absatdarov Report: SAND CONTROL IN WELLS OF UNDERGROUND GAS STORAGE
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«Oil and Gas Horizons» Moscow 2014
Russian State Geological Prospecting University MGRI – RSGPU Faculty of exploration and mining technologies
Department of modern drilling technology
Postgraduate student: Ramil Absatdarov
Report: SAND CONTROL IN WELLS OF
UNDERGROUND GAS STORAGE
The purpose and task of the report
SAND CONTROL IN WELLS OF UNDERGROUND GAS STORAGE 2
Introduction - underground gas storage
The Purpose - sand control in wells of underground gas storage
The task - calculation the parameters of the gravel pack for wells of Kasimovskoye UGS (underground gas storage)
Future research work – Gravel Pack in Horizontal Offshore Wells
Conclusion of the report
UNDERGROUND GAS STORAGE (UGS)
SAND CONTROL IN WELLS OF UNDERGROUND GAS STORAGE 3
balancing of peak consumption;
security of supply via the Unified Gas Supply System (UGSS);
reducing peak-loads in the UGSS;
security of gas exports via main pipelines in cases of unforeseen interruptions;
seasonal balancing of gas exports;
additional gas supply in emergency situations (force majeure) and gas deposits for extremely severe winters;
long term / strategic reserves (balancing over years).
Underground gas storage is designed for:
seasonal balancing of domestic consumption;
UNDERGROUND GAS STORAGE (UGS)
SAND CONTROL IN WELLS OF UNDERGROUND GAS STORAGE 4
Types of Underground Gas Storage:
Salt caverns Depleted oil and gas reservoirs
Aquifer Storage
UGS Working Gas Volume by storage types
SAND CONTROL IN WELLS OF UNDERGROUND GAS STORAGE 5
UGS Working Gas Volume by countries
SAND CONTROL IN WELLS OF UNDERGROUND GAS STORAGE 6
UGS: number of facilities
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UGS Working Gas Volume by operators
SAND CONTROL IN WELLS OF UNDERGROUND GAS STORAGE 8
UGS distribution worldwide
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CAUSES OF SAND PRODUCTION
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Sand production occurs when:
- A destabilizing action exceeds or removes the forces, which hold sand grains together;
- The drag force from produced or injected fluids can shear the intergranular cement bonds and destroy the natural arches of unconsolidated sands;
- Unconsolidated fine collector;
- Destruction processes in the reservoir near-wellbore;
- A sharp increase in drawdown during the development and operation of wells.
EFFECTS OF SAND PRODUCTION
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Area Problem Effect
Reservoir Wellbore fill - Restricted access to production interval - Loss of productivity - Loss of reserve
Calculation the parameters of the gravel pack for wells of Kasimovskoye UGS
The results of particle size analysis
SAND CONTROL IN WELLS OF UNDERGROUND GAS STORAGE 24
0,0
10,0
20,0
30,0
40,0
50,0
60,0
70,0
80,0
90,0
100,0
0,0100,1001,000
D50 = 6 · d50
Gravel size:
D50 = 0,474 mm
Calculation the parameters of the gravel pack for wells of Kasimovskoye UGS
Sieve Opening, mm
Perc
ent R
etai
ned,
%
Particle Size Distribution
The cumulative particle size distribution curves of formation sand laboratory samples
BS EN ISO 13503-2:2006+A1:2009 API Recommended Practice 58 (RP58) (1986)
d50 = 0,079 mm Slot width of screen:
0,3 mm
SAND CONTROL IN WELLS OF UNDERGROUND GAS STORAGE 25
Future research work – Gravel Pack in Horizontal Offshore Wells
Key issues in project planning and execution openhole horizontal gravel packs:
Reservoir study
Shale stability study
Formation integrity test
Gravel pack sand sizing
Gravel pack screen
Workstring design
Well displacement
Fluid loss control
SAND CONTROL IN WELLS OF UNDERGROUND GAS STORAGE 26
Conclusion of the report
Openhole Gravel Pack
Screen GP sand Formation • GP sand is (by design) 5-6 times larger
than formation sand d50.
• GP’ing does not alterscreen behavior.
• GP’ing will arrestannular flow, i.e.
transport of moveable material.
• GP screen must allowproduction of
fines, otherwise completion will plug.
• Pore throat of most GP sands will
restrictproduction of fines.
• GP’ing will arrest/trap formation filter
cake on the formation surface.
• GP’ing will not allow formation to
relax/de-stress.
SAND CONTROL IN WELLS OF UNDERGROUND GAS STORAGE
«Oil and Gas Horizons» Moscow 2014
Ramil Absatdarov Postgraduate student at Russian State Geological Prospecting University Department of Modern drilling technology Mob.: +7 (964) 777-94-24 E-mail: [email protected]