Lithologic Reservoirs ›› 2019, Vol. 31 ›› Issue (1): 159-164.doi: 10.12108/yxyqc.20190119

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Plugging mechanism of large size profile control particles and deep migration performance

CHEN Yuhao, WANG Keliang, LI Gen, LU Chunjing   

  1. Key Laboratory of Enhanced Oil Recovery, Ministry of Education, Northeast Petroleum University, Daqing 163318, Heilongjiang, China
  • Received:2018-09-08 Revised:2018-11-07 Online:2019-01-18 Published:2019-01-18

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Abstract: Large size elastic profile control particle is different from conventional profile control agent. It can effectively improve the heterogeneity of deep formation by reasonable use. However,due to the limitation of experimental equipment,the laboratory injection experiment of large size particles is limited. In order to solve this problem,fracture model and particle displacement device were made,and a kind of plugging and deep migration performance evaluation experiment of elastic profile control particle with particle size of 1-5 mm was designed based on field application. Based on the pressure data that were recorded by pressure sensors connected to the displacement device,pressure-time curves were drawn and relevant data analysis methods were summarized. The particle deformation through pressure was proposed to evaluate the deep migration ability and plugging ability of particle,and the effects of particle content on plugging and migration were investigated by changing the content of particles in the profile agent system. The experiment results show that the higher the particle content in profile control particle system,the better the effect of plugging and deep migration. The migration ability of 1 mm particle is stronger and the plugging ability of 3 mm particle is stronger. Both 1 mm particle and 3 mm particle can be applied to the deep profile control. The rigid plugging ability of 5 mm particle diameter is so strong that it's not suitable for the deep profile control. In field application,the particle selection should be carried out in combination with the geological condition of the target block and the purpose of the profile control. The design of the experiment and the corresponding analysis method are simple and effective,and the required devices are easier to obtain. This experimental method can be used for reference in laboratory experiments on the performance of similar large size profile control particles.

Key words: large size elastic profile control particles, plugging ability, deep migration ability, particle content

CLC Number: 

  • TE357
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