Effect of Depressurized Hydrate on Soil Layer Around Wellhead
作者单位：Marine Engineering and TechnologySun Yat-sen University Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)
会议日期：2016年
学科分类：0820[工学-石油与天然气工程] 08[工学] 082002[工学-油气田开发工程]
基 金：financially supported by the Fundamental Research Funds for the Central Universities (NO.19lgpy86)
关 键 词：Nature gas hydrate Decompose Soil layer Deformation
摘 要：Nature gas hydrate has a wide distribution on land and in the sea,which can greatly meet human demand for energy and is a potential clean *** paper mainly studies the deformation of the soil around the wellhead during the process of exploiting hydrate by the anti-pressure method,and analyzes the two sensitivities of the dip angle of the hydrate-bearing soil layer and the decomposition range of the *** paper also evaluates the stability of the soil layer around the wellhead during *** study found that when the dip angle of the seabed soil layer is constant,the decomposition area and the deformation of the soil body increases *** the decomposition range is less than a certain critical value,the deformation is limited and no collapse occurs;but once this critical value is exceeded,the soil around the decomposition zone is *** extent to which hydrate decompose has the greatest impact on soil *** conclusions have certain reference value for the assessment of the safety of hydrate exploiting.