细砂质含水合物沉积介质的非线性弹性力学模型  

A nonlinear elastic model for fine sandy hydrate-bearing sediments

作　　者：张峰[1,2] 刘丽华 吴能友[3,4] 吴起[1,2] 金光荣 ZHANG Feng;LIU Lihua;WU Nengyou;WU Oi;JIN Guangrong(Key Laboratory of Gas Hydrate,Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences,Guangzhou 510640,China;University of Chinese Academy of Sciences,Beijing 100049,China;Key Laboratory of Gas Hydrate,Ministry of Natural Resources,Qingdao Institute of Marine Geology,Qingdao 266071,China;Laboratory of Marine Mineral Resources,Qingdao National Laboratory for Marine Sciences and Technology,Qingdao 266071,China)

机构地区：[1]中国科学院广州能源研究所,中国科学院天然气水合物重点实验室,广州510640 [2]中国科学院大学,北京100049 [3]中国地质调查局青岛海洋地质研究所,自然资源部天然气水合物重点实验室,青岛266071 [4]海洋国家实验室海洋矿产资源评价与探测技术功能实验室,青岛266071

出　　处：《海洋地质与第四纪地质》2019年第3期193-198,共6页Marine Geology & Quaternary Geology

基　　金：国家自然科学基金项目“南海北部台西南盆地浅层沉积物中自生碳酸盐岩形成动力学模拟研究”(41776071);广东省基金自由申请项目“海洋沉积物中水合物分解相关的物理和地球化学过程模拟研究”(2015A030313718);中国石油-中科院科技合作项目“中石油南海矿权区天然气水合物资源评价”(2015-4813)

摘　　要：描述含水合物沉积介质的应力-应变关系,建立含水合物沉积介质的力学模型,预测水合物储层的变形规律,是有效开发水合物资源的基本前提。以经典邓肯-张模型为基础,结合细砂质含水合物沉积介质力学三轴试验数据,提出了适合细砂质含水合物沉积介质的非线性弹性力学模型及其参数,并验证了模型的准确性。结果表明,该模型及其参数可以很好地描述细砂质含水合物沉积介质的应力-应变的非线性弹性关系。Describing the stress-strain relationship of hydrate-bearing sediments,establishing a mechanical model of hydrate-bearing sediments and predicting the deformation of hydrate reservoirs are the basic prerequisites for the effective development of hydrate resources.In this study,the triaxial compressive properties of fine sandy hydrate-bearing sediments are analyzed to examine the applicability of a nonlinear elastic constitutive model based on the Duncan-Chang model.It is shown that the proposed model can describe the stress-strain behavior of fine sandy hydrate-bearing sediments,which demonstrates the validity and reasonability of this model.

关 键 词：天然气水合物 力学特性 邓肯-张模型 非线性弹性模型 

分 类 号：P73[天文地球—海洋科学]