ISSN 1673-8217 CN 41-1388/TE
主管:中国石油化工集团有限公司 主办:中国石油化工股份有限公司河南油田分公司
齐桂雪. 2020: 枯竭气藏型储气库储层应力敏感性实验研究. 石油地质与工程, 34(03): 76-80.
引用本文: 齐桂雪. 2020: 枯竭气藏型储气库储层应力敏感性实验研究. 石油地质与工程, 34(03): 76-80.
QI Guixue. 2020: Experimental study on reservoir stress sensitivity of underground storage of depleted gas reservoirs. Petroleum Geology and Engineering, 34(03): 76-80.
Citation: QI Guixue. 2020: Experimental study on reservoir stress sensitivity of underground storage of depleted gas reservoirs. Petroleum Geology and Engineering, 34(03): 76-80.

枯竭气藏型储气库储层应力敏感性实验研究

Experimental study on reservoir stress sensitivity of underground storage of depleted gas reservoirs

  • 摘要: 枯竭气藏型储气库储层在储气库"强注快采"、"大吞大吐"运行时,对储层压力反复升降过程中应力敏感性的认识不清,结合目标储气库地质、开发特征,通过室内实验开展工况条件下多周期注采循环岩石渗透率应力敏感性评价、孔隙度应力敏感性评价,为储气库注采参数优化和库容评价提供依据。实验结果表明,多轮次注采压力升降过程中,气库储层岩石渗透率下降,但随着注采轮次的增加,渗透率下降幅度减小,存在明显的渗透率滞后效应。岩心渗透率、孔隙度和压缩系数的应力敏感性较弱,从应力敏感性角度分析,枯竭气藏适宜选做储气库库址,并能有效运行。

     

    Abstract: During the operation of "strong injection and rapid production" and "big huff and puff" in the underground storage of depleted gas reservoirs,the stress sensitivity in the repeated process of reservoir pressure rises and falls is unclear.Combined with the geological and development characteristics of the target underground storage with gas reservoirs,the sensitivity evaluation of rock stress permeability and stress porosity with multi injection-production cycles under the working conditions was carried out through indoor experiments,which provides the basis for the optimization of injection-production parameters and storage capacity evaluation of the underground storage.The experimental results show that the permeability of rock decreases when the internal pressure rises and falls for several times.With the increase of internal pressure,the change range of permeability decreases.The stress sensitivity of permeability,porosity and compressibility is weak.According to the analysis of stress sensitivity,the target depleted gas reservoir is suitable for gas storage site and can operate effectively.

     

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