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Zhen Enlong, Cao Chang. A method for the development of ultra-deep heavy oil reservoirs with dilute gas[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2015, 37(S1): 70-72. doi: 10.11781/sysydz2015S1070
Citation: Zhen Enlong, Cao Chang. A method for the development of ultra-deep heavy oil reservoirs with dilute gas[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2015, 37(S1): 70-72. doi: 10.11781/sysydz2015S1070
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A method for the development of ultra-deep heavy oil reservoirs with dilute gas

doi: 10.11781/sysydz2015S1070

  • Research Institute of Engineering Technology, SINOPEC Northwest Company, Urumqi, Xinjiang 830011, China

  • Received Date: 2015-08-01
  • Rev Recd Date: 2015-10-14
  • Publish Date: 2015-12-31
    Abstract
  • Wells in the heavy oil producing blocks of the Tahe Oil Field are usually very deep and demand a large amount of dilute gas, yet have a low yielding rate. Conventional techniques can no longer meet production needs. Nitrogen is now applied to dilute gas injection. Injection depth, nitrogen amount, choke size and the start-up pressure of gas lift were discussed. This new method was practiced in well YQ5-1 in Yuqi area and proved successful. Blending rate decreased from 11:1 to 3.4:1, and single well yield increased from 10 t/d to 38 t/d. It saved dilute gas and raised oil production.

     

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