深海天然气水合物钻探取样中的“桩效应”分析  

Study on the“Pile Effect”in Gas Hydrate Sample Coring in Deep Sea

作　　者：朱杰然[1,2] 

机构地区：[1]中国石油大学〈华东〉,山东东营257061 [2]中石化胜利石油工程有限公司钻井工艺研究院,山东东营257017

出　　处：《探矿工程（岩土钻掘工程）》2013年第8期18-21,共4页Exploration Engineering:Rock & Soil Drilling and Tunneling

基　　金：国家"863"课题"天然气水合物钻探取芯工程样机及配套技术"(SS2013AA090602)

摘　　要：建立了天然气水合物钻探取样过程中"桩效应"的数学模型,通过解析分析,提出了取样高度的隐式解。分析了取样筒内径和样品与取样筒之间摩擦系数对取样高度的影响。参数分析表明,岩层的内摩擦角和粘聚力对取样高度也有很大的影响。取样深度对取样率的影响较小。The mathematical model of＂pile effect＂was built in the process of gas hydrate sampling coring and the implicit analytical solution for the sample height is presented by analytical analysis.The influences of the sampling tube diameter and the friction coefficient between the sample and the sampling tube were analyzed.Parametric analysis shows that the inherent friction angle and cohesion of the target layer have great influence on the sample height.The sampling depth in the target layer has unapparent influence on the sampling rate.

关 键 词：天然气水合物 钻探 桩效应 取样高度 

分 类 号：P634[天文地球—地质矿产勘探]