1. Research and development process
1.1 The first generation of diesel in 2004.
1.1.1 Independent research and development
1.1.2 Fill the domestic technical gap.
1.1.3 Air and diesel oil
1.1.4 Energy conservation and environmental protection
1.1.5 600Nm3/h
1.2 Second generation explosion-proof diesel type in 2008.
1.2.1 Explosion-proof function
1.2.2 Full automatic control
1.2.3 The security level is certified by the international classification society.
1.2.4 1200~2400Nm3/h
1.3 The third generation explosion-proof natural gas type in 2011.
1.3.1 Air gas type
1.3.2 Remote intelligent control
1.3.3 Multiple security
1.4 The fourth generation of pure oxygen wastewater engine gas type in 2015.
1.4.1 Pure oxygen engine.
1.4.2 Waste water engine
1.4.3 International oil field equipment manufacturing standard.
1.4.4 9600Nm3/h
1.5 The application situation
2. Product introduction
Using the rocket launch principle, fuel (diesel oil, crude oil or natural gas) and air are injected into the generator to burn, steam, nitrogen and carbon dioxide are composed of high temperature and high pressure multi thermal fluid, which can be widely used in the development of heavy oil field.
2.1 Three-in-one
In theory: 12t/h Multi-Heat Fluid Generator = 5.9t/h Steam boiler 4.7t N2/h Air separation plant 1.4t/h CO2 Collecting device
2.2 Product classification
Output level: single generator, double generator, three generator and four generator (single generator heat carrier mass 3t/h)
Pressure range: 20MPa、30MPa、35MPa、50MPa
According to fuel type: diesel type, natural gas type, crude oil type.
Use water type: soft water, waste water.
3. Production increase principle
3.1 Steam
3.1.1 Release high latent heat energy and reduce oil viscosity.
3.1.2 Heat the fluid to expand and increase the energy of the reservoir.
3.1.3 Carrying plug and improving seepage condition.
3.2 N2
3.2.1 Low thermal conductivity and loss of thermal energy.
3.2.2 Ultra-high compressibility, increase the energy of oil layer.
3.2.3 Adjust the intake profile and expand the steam sweep volume.
3.3 CO2
3.3.1 Reduce oil and water interfacial tension and improve oil displacement efficiency.
3.3.2 Dissolve carbonate matrix and improve pore throat structure
3.3.3 Dissolve in viscosity and expand energy.
3.4 Synergistic effect (1.1 1.2 1.3)
3.4.1 Expand the radius of use of reserves.
3.4.2 Prolong the period of thermal recovery.
3.4.3 Improve the efficiency of cycle productivity.
4. Technical advantages
4.1 High thermal efficiency: Efficiency is 97-99%.
4.2 Environmental protection: All combustion products are injected underground, reducing green house gases and toxic gas emissions.
4.3 Integration: The equipment is installed according to the standard container size, and the equipment is highly automated.
4.4 Fuel type diversification: diesel, natural gas, crude oil;
4.5 The output displacement is gradually increased:1200Nm³/h, 2400Nm³/h , and 9600Nm3/h(air quantity);
4.6 Product preliminary serialization;
4.7 The product meets the requirement of domestic and foreign operation.
5. Conditions of application
6. Application effects
Since 2005, there have been on-site applications in Petro China Daqing, Tuha, Xinjiang Oilfield, Sinopec Shengli Oilfield and CNOOC Bohai oilfield, and have completed more than 300 Wells. The multi-heat fluid technology is gradually improved from geological design, engineering design, technical equipment, process supporting and site construction to maturity.
Case 1: According to the characteristics of the multi-heat fluid technology, CNOOC Bohai oilfield uses the multi-heat fluid technology to carry out the block development, and has obtained a major breakthrough in the thermal recovery project of heavy oil at sea.
B28h well stimulation effect
B28h well started production after completion of injection on February 13, 2010，The daily oil production peak is 128m³ ， It is equivalent to 58.7% of the total daily production of 20 Wells in the same platform，On May 31, 2011, the total production was 470 days, and the accumulated oil production was 34052.91m³, and the cumulative oil production was 21949.19m³.
Case 2: The oil production plant of xinjiang oilfield company is the control cost and stable production, and the development of the block is carried out by using the thermal mining technology of multiple heat flow.
Comparison of the effect of multi-heat fluid injection with conventional steam injection.（Typical Wells）
The monthly oil production curve of HD45328 well （5 rounds well）
The monthly oil production curve of H45299 well （5 rounds well）
The monthly oil production curve of H83038 well （7 rounds well）
The monthly oil production curve of H83039 well （9 rounds well）
The principle of selecting well is the same level, similar reservoir property, and no oil increasing measure well.
Economic benefit evaluation（2016-2017）
Daily output
Cycle production
Input-output ratio
Operation cost per ton of oil
In the case of 15 Wells with continuous stable operation of the oil production plant of xinjiang oilfield company, the input output ratio is greater than 2.1, and the operation cost of on-site tons of oil is reduced by 27.8%.
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