引用本文:[点击复制]
[点击复制]
【打印本页】 【在线阅读全文】【下载PDF全文】 查看/发表评论下载PDF阅读器关闭

←前一篇|后一篇→

过刊浏览    高级检索

本文已被:浏览 299次   下载 343 本文二维码信息
码上扫一扫!
砂岩储层射孔压实伤害评价
朱秀星,张林,薛世峰,仝兴华,滕岳珊
0
(中国石油大学储运与建筑工程学院,山东青岛 266580;胜利石油管理局测井公司,山东东营 257000;山东大学威海校区,山东威海 264209)
摘要:
基于应变率对砂岩孔隙度演化的敏感性分析,建立砂岩储层射孔压实伤害评价力学模型。对射孔冲击载荷作用下近孔道砂岩的动力学响应进行数值分析,获得模型中关键力学参数,量化分析砂岩径向孔隙度与渗透率分布,评价射孔压实伤害程度。研究结果表明:数值分析数据与试验数据能够较好地吻合,验证了射孔压实伤害评价方法的有效性;由于破碎带与网状微裂缝的产生,射孔后孔道内壁表层砂岩孔隙度要高于初始值;压实带内砂岩的渗透率明显降低,严重影响孔道流动性能;距孔道入口端轴向距离越远,砂岩的压实带厚度、孔隙度与渗透率伤害程度越小;随冲击载荷强度的增加或岩石强度的降低,射孔压实伤害程度将增大。
关键词:  应变率  孔隙度  渗透率  伤害评价  砂岩
DOI:10.3969/j.issn.1673-5005.2014.01.021
投稿时间:2013-03-28
基金项目:国家科技重大专项(2011ZX02006-002);中国石油大学(华东)研究生创新基金项目(13CX06065A)
Evaluation of perforating damage for sandstone
ZHU Xiu-xing,ZHANG Lin,XUE Shi-feng,TONG Xing-hua,TENG Yue-shan
(College of Pipeline & Civil Engineering in China University of Petroleum, Qingdao 266580, China;Well Logging Company, Shengli Petroleum Administrative Bureau, Dongying 257000, China;Weihai Branch of Shandong University, Weihai 264209, China)
Abstract:
Based on the sensitivity analysis of deformation rate effect on porosity evolution, the mechanical model for evaluating perforating damage of sandstone was developed. Combining with mechanical parameters at different time, which were obtained by dynamic response analysis of sandstone around the perforation tunnel, the distributions of radial porosity and permeability were studied. Then, the perforating damage degree was evaluated. The results were compared with experimental data, and the validity of the evaluation method was proved to be effective. The results also show that the porosity near the tunnel is even somewhat higher than undamaged average porosity because of crushing of grains or tensile fractures around the perforation wall. In addition, porosity and permeability of sandstone in crushed zone reduce significantly, which impairs the flow performance of perforating tunnel severely. Furthermore, the more distance from the entrance of the tunnel, the smaller the reducing amplitude of crushed zone thickness, porosity and permeability will be. When the shock load intensity increases or the strength of sandstone decreases, the damage degree will be severe.
Key words:  deformation rate  porosity  permeability  damage evaluation  sandstone
版权所有 中国石油大学学报(自然科学版)编辑部 Copyright©2008 All Rights Reserved
主管单位:中华人民共和国教育部 主办单位:中国石油大学
地址: 青岛市黄岛区长江西路66号中国石油大学期刊社 邮编:266580 电话:0532-86983496 E-mail: journal@upc.edu.cn
本系统由:北京勤云科技发展有限公司设计