南海天然气水合物水平井降压开采诱发沉积物力学响应规律

TE357; 针对南海泥质粉砂型天然气水合物沉积物的物性和力学性质,建立水平井降压开采过程中井周沉积物的流-固-热-化响应模型,采用弹塑性模型表征塑性变形规律.结果表明:重力作用导致深层水平井压降程度低于浅层水平井,一定程度上抑制水合物分解前缘的扩展,导致深层水平井产能略低于浅层水平井;在降压开采初期水合物分解前缘未形成时,沉积物层塑性应变不明显;随着降压开采时间的增加,水合物分解区力学性质劣化显著,分解区的内聚力等强度参数变低;分解区的塑性应变明显高于未分解区....

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Published in中国石油大学学报（自然科学版） Vol. 46; no. 6; pp. 41 - 47
Main Authors 郭旭洋, 金衍, 林伯韬, 卢运虎, 訾敬玉
Format Journal Article
LanguageChinese
Published 中国石油大学(北京)石油工程学院,北京 102249 01.12.2022
Subjects
岩土力学
数值模拟
弹塑性变形
天然气水合物
水平井
Online AccessGet full text
ISSN1673-5005
DOI10.3969/j.issn.1673-5005.2022.06.005

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Abstract TE357; 针对南海泥质粉砂型天然气水合物沉积物的物性和力学性质,建立水平井降压开采过程中井周沉积物的流-固-热-化响应模型,采用弹塑性模型表征塑性变形规律.结果表明:重力作用导致深层水平井压降程度低于浅层水平井,一定程度上抑制水合物分解前缘的扩展,导致深层水平井产能略低于浅层水平井;在降压开采初期水合物分解前缘未形成时,沉积物层塑性应变不明显;随着降压开采时间的增加,水合物分解区力学性质劣化显著,分解区的内聚力等强度参数变低;分解区的塑性应变明显高于未分解区.
AbstractList TE357; 针对南海泥质粉砂型天然气水合物沉积物的物性和力学性质,建立水平井降压开采过程中井周沉积物的流-固-热-化响应模型,采用弹塑性模型表征塑性变形规律.结果表明:重力作用导致深层水平井压降程度低于浅层水平井,一定程度上抑制水合物分解前缘的扩展,导致深层水平井产能略低于浅层水平井;在降压开采初期水合物分解前缘未形成时,沉积物层塑性应变不明显;随着降压开采时间的增加,水合物分解区力学性质劣化显著,分解区的内聚力等强度参数变低;分解区的塑性应变明显高于未分解区.
Author 訾敬玉
卢运虎
林伯韬
金衍
郭旭洋
AuthorAffiliation 中国石油大学(北京)石油工程学院,北京 102249
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GUO Xuyang
LU Yunhu
ZI Jingyu
JIN Yan
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Keywords 岩土力学
数值模拟
弹塑性变形
天然气水合物
水平井
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Snippet TE357; 针对南海泥质粉砂型天然气水合物沉积物的物性和力学性质,建立水平井降压开采过程中井周沉积物的流-固-热-化响应模型,采用弹塑性模型表征塑性变形规律.结果表明:重...
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Title 南海天然气水合物水平井降压开采诱发沉积物力学响应规律
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