An improved particles model for stress sensitivity in low-permeability sandstones

S. H. Gai; H. Q. Liu; S. L. He; G. Lei; S. Y. Mo; X. Huang; Y. Yang; X. Chen

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자료유형: 학술저널

저자정보: S. H. Gai (China University of Petroleum) H. Q. Liu (China University of Petroleum) S. L. He (China University of Petroleum) G. Lei (China University of Petroleum) S. Y. Mo (China University of Petroleum) X. Huang (China University of Petroleum) Y. Yang (China University of Petroleum) X. Chen (Guangzhou Marine Geological Survey)

저널정보: 한국자원공학회 Geosystem Engineering Geosystem Engineering Vol.19 No.2

발행연도: 2016.1

수록면: 89 - 95 (7page)

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연구주제

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연구배경

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Stress-dependent permeability and porosity of porous media is very important for the development of oil reservoirs, especially in low-permeability reservoirs. Porous structure can change in response to an increase in the effective stress to induce the decline of permeability and porosity, which ultimately affects the fluid flow property. In this study, a capillary module, considering the arrangement and the deformation of particles, has been established to express the stress sensitivity of porous media based on the particle packing model. The predictions of variation of permeability by the proposed model have been validated by comparing with the experimental data. The predictions by the current model show the same variation trend with the experimental data and are consistent with the compression experiments. The proposed variation of permeability with the increase in effective stress depends on the factors such as the arrangement of particles (contact angle), the deformation of particles (elastic module and Poisson’s ratio) and effective stress. The effects of these parameters on variation of permeability are discussed in detail.

참고문헌 (19)

참고문헌 신청

Acharya, R. C. / 2004 / Porosity–permeability properties generated with a new 2-parameter 3D hydraulic pore-network model for consolidated and unconsolidated porous media / Advances in Water Resources 27:707~723

Al-Kharusi, A. S. / 2007 / Network extraction from sandstone and carbonate pore space images / Journal of Petroleum Science and Engineering 56:219~231

Blunt, M. J. / 2001 / Flow in porous media—pore-network models and multiphase flow[J] / Current Opinion in Colloid & Interface Science 6:197~207

Dautriat, J. / 2007 / Stressdependent permeabilities of sandstones and carbonates:Compression experiments and pore network modelings / SPE Annual Technical Conference and Exhibition

Dobrynin, V. M. / 1962 / Effect of overburden pressure on some properties of sandstones / Society of Petroleum Engineers Journal 2:360~366

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