关键词: 低渗储层, 应力敏感, 评价方法, 渗透率模量

Abstract: Stress sensitivity Evaluation is important to formation damage control and determination of reasonable well productivity,especially for low permeability reservoirs,currently,there are much argument on evaluation methods and standards of stress sensitivity in China.By research of foreign and domestic standards,the disadvantages of domestic industrial standard and the limitation of permeability modulus used in theoretical research are discussed.Based on analysis of plenty of experimental data,a new stress sensitive index is defined,with which,the relationship of initial permeability and effective stress can be expressed conveniently,which is significant to productivity evaluation of oil & gas well and establishment of model of flow through porous media for low permeability reservoirs.

Key words: low permeability reservoir, stress sensitivity, evaluation method, permeability modulus