Science & Technology Review >

2014 , Vol. 32 >Issue 28/29: 59 - 63

DOI: https://doi.org/10.3981/j.issn.1000-7857.2014.h2.007

Articles

Experimental Study on the Porous Flow Law of Tight Oil Reservoir

  • ZHAO Yuji ,
  • WANG Xuewu ,
  • LING Haochuan
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  • 1. China University of Mining and Technology(Beijing), Beijing 100083, China;
    2. Langfang Branch, PetroChina Exploration and Development Research Institute, Langfang 065007, China;
    3. Institute of Bohai Offshore Oil, Tianjin Branch, CNOOC. Tianjin 300452, China

Received date: 2014-07-02

  Revised date: 2014-08-12

  Online published: 2014-10-24

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Abstract

Based on the precise measurement of the micro flow by the photo-electric micro meter, a method to measure the differential pressure flow curves of tight oil cores is proposed in this paper. The influence factors, such as throat radius, micro fracture and fluid property, on the porous flow law of tight oil reservoir and the start-up pressure gradient are analyzed. The results are as follows. The essence of nonlinear flow in tight oil core is that the cores are composed of different levels of the throats. The real startup pressure gradient and the maximum throat radius have a good power-law relationship, and the pseudo start-up pressure gradient also has a power-law relationship with the average throat radius. The core with micro facture has smaller real & pseudo start-up pressure gradients than the core without any micro fracture. The real and pseudo start-up pressure gradients will be greater when using formation oil than those when using formation water in the experiment. The lower the permeability of the core, the greater difference of the real and pseudo start-up pressure gradients.

Key words： tight oil; porous flow law; start-up pressure gradient; micro fracture; micro flow

Cite this article

ZHAO Yuji , WANG Xuewu , LING Haochuan . Experimental Study on the Porous Flow Law of Tight Oil Reservoir[J]. Science & Technology Review, 2014 , 32(28/29) : 59 -63 . DOI: 10.3981/j.issn.1000-7857.2014.h2.007

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