Cyclic Steam Injection
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The document discusses CSS (cyclic steam stimulation) technology for heavy oil recovery. It describes the CSS mechanism and main production process, which involves injecting steam to reduce oil viscosity and increase mobility. It then outlines some key mature CSS technologies, including high-efficiency steam injection systems using vacuum insulated tubing and thermal packers, as well as downhole measurement techniques. Finally, it provides selection standards for reservoirs suitable for successful CSS projects.
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He has also been teaching courses in international economics, economic policy in latin america, economic geography and economic development at the Universidad Iberoamericana del Noroeste, CISE and UCSD. Previously, he worked at the Energy Regulatory Commission and the Ministry of Energy. He has also worked as an energy economist and economic consultant for private firms. He has been a member of the Technical Committee for the Federal Electoral Institute and CONACYT. In 2009, he is also a member of the U.S.-Mexico Border Governors Council of Economic Advisers.
Email: adiazbau@hotmail.com
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Cyclic Steam Injection
- 2. 1.2 Clascification standard Of Heavy Oil Classification Standard Of Heavy Oil Super heavy oil Extra heavy oil Conventional heavy oil ๏นฅ 0.9800 ๏นฅ 0.9500 ๏นฅ 0.9200 gravity ๏ผ 20โ ๏ผ Second standard ๏นฅ 50,000 Super 10,000 ๏ฝ 50,000 Extra 100 ๏ฝ 10,000 Conventional Gas-free viscosity (mPa.s) (50โ) First standard Classification
- 4. CSS is also known as steam huff and puff 2.1 CSS Production Process
- 7. 2.3 Main mature technologies for CSS Steam generator flow chart
- 9. heat conduction coefficient is only 0.007 W/m โ. It can reduce heat loss in wellbore and increase steam quality Formation Compensation pipe Thermal packer Vacuum insulation tubing 2.3 Main mature technologies for CSS Vacuum insulation tubing 40-60% 0.007 Vacuum insulation tubing 20-40% 0.07 Conventional insulation tubing Steam quality at bottom of wellbore ๏ผ 75%@well head ๏ผ Thermal conductivity (W/m.โ) Type
- 10. Outer tube Inner pipe Seal ring Gland 2.3 Main mature technologies for CSS During the period of steam injection ,the thermal sensitive packer is set down, the insulated tubing will extend due to high temperature, the compensation pipe is used to compensate the extended length of steam injection string .so that the insulation tubing can not get bending Compensation pipe
- 12. Low producing ability 2.3 Main mature technologies for CSS (2) High Temp. 4 Parameters Measurement Technique Steam pressure Downhole temperature Steam quality get steam absorbing profile flow rate High temperature test chart
- 13. (3) Lifting system: BPU & tubing pump BPU +tubing pump: excellent adaptation and wide us e, is commonly used in lifting system for heavy oil production. (will be discussed in SECTION 3) 2.3 Main mature technologies for CSS
- 15. Selection Standard for Successful CSS 2.4 Selection Standard for Successful CSS < 100,000 ๏ผ 50โ ๏ผ โฅ 50 โฅ 20 โฅ 200 md โฅ 10m โค 1,700m Selection standard 1,735 ๏ผ 50โ ๏ผ 2,000 ๏ฝ 3,000 ๏ผ 50โ ๏ผ Viscosity mPa.s 70 75 Oil Saturation ๏ผ 32 30 Porosity ๏ผ 4000 2060 Permeability md 30 37.7 Net pay m 550 850 Depth m FNE Qi40(Liaohe) Item