深层天然气扩散系数模拟实验装置的研制

doi:10.11720/wtyht.2020.0222

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Abstract

In order to measure the diffusion coefficient of hydrocarbon gases in rocks more accurately and provide parameters for the evaluation of the loss and preservation of natural gas accumulations, the authors developed an experiment apparatus to simulate the diffusivity of natural gas in depth.The hardware structure, technical parameters of the apparatus and the experimental flow for simulating the deep natural gas diffusion coefficient were described. Taking the shale of Cambrian Niutitang formation and the dense limestone of Permian Maokou formation as examples, the authors simulated the natural gas diffusion in rocks under high temperature and high pressure, and calculated their diffusion coefficients. The results show that the test data of the deep natural gas diffusion coefficient are reliable by using the apparatus, which provides a technical means for the evaluation of deep gas preservation conditions.

Key words： deep natural gas diffusion coefficient simulation experiment device

Received: 26 April 2020 Published: 29 December 2020

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	Articles by authors
	Li LU
	Guo-Jian WANG
	Huai-Ping ZHU
	Guang-Hua WANG
	Tao JIANG

Cite this article:

Li LU,Guo-Jian WANG,Huai-Ping ZHU, et al. The development of an experimental measuring apparatus for simulating the diffusion coefficient of naturalgas in depth[J]. Geophysical and Geochemical Exploration, 2020, 44(6): 1441-1445.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2020.0222 OR https://www.wutanyuhuatan.com/EN/Y2020/V44/I6/1441

Schematic diagram showing the experimental apparatus for simulating the diffusion coefficient of natural gasin depth

Variation of methane concentration in nitrogen chamber under experimental conditions of 25 ℃ and 55 MPa

Variation of methane concentration in nitrogen cham-ber under experimental conditions of 25 ℃ and 55 MPa

Variation of methane concentration in nitrogen chamber under experimental conditions of 110 ℃ and 2 MPa

Variation of methane concentration in nitrogen cham-ber under experimental conditions of 110 ℃ and 2 MPa

Variation of methane concentration in nitrogen chamber under experimental conditions of 50 ℃ and 10 MPa

Variation of methane concentration in nitrogen cham-ber under experimental conditions of 50 ℃ and 10 MPa

Diffusion coefficient of the limestone sample from Tarim Basin(30 ℃, 0.01 MPa)

Porosity and permeability of a limestone sample

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