[1]王委  刘亚  许春田  陈小元  邵冬冬.钻井井下爆炸堵漏技术[J].石油钻采工艺,2018,40(1):063-67.[doi:10.13639/j.odpt.2018.01.011]
 WANG Wei,LIU Ya,XU Chuntian,et al.Downhole explosive plugging technology[J].Oil Drilling & Production Technology,2018,40(1):063-67.[doi:10.13639/j.odpt.2018.01.011]
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钻井井下爆炸堵漏技术
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《石油钻采工艺》[ISSN:1000-7393/CN:13-1072/TE]

卷:
40卷
期数:
2018年1期
页码:
063-67
栏目:
钻井完井
出版日期:
2018-01-20

文章信息/Info

Title:
Downhole explosive plugging technology
文章编号:
1000 – 7393( 2018 )01 – 0063 – 05
作者:
王委1  刘亚2  许春田1  陈小元1  邵冬冬13
1. 中石化华东石油工程公司江苏钻井公司; 2. 中石化华东石油工程公司工程技术公司; 3. 中国石化集团江苏油田博士后科研工作站
Author(s):
WANG Wei1 LIU Ya2 XU Chuntian1 CHEN Xiaoyuan2 SHAO Dongdong1 3
1. Jiangsu Drilling Company, SINOPEC East China Oilfield Service Corporation, Yangzhou 225009, Jiangsu, China; 2. Engineering Company, SINOPEC East China Oilfield Service Corporation, Yangzhou 225009, Jiangsu, China; 3. Postdoctors of Jiangsu Oil Exploration Corporation, SINOPEC, Yangzhou 225009, Jiangsu, China
关键词:
裂缝性漏失爆炸堵漏配套技术现场应用堵漏成功率
Keywords:
fractured leakage explosive plugging support technology field application success ratio of plugging
分类号:
TE28
DOI:
10.13639/j.odpt.2018.01.011
文献标志码:
B
摘要:
现有堵漏方法对渗透性漏失较易解决,对裂缝性漏失,堵漏一次成功率低,处理过程复杂、周期较长、成本高,如近年来苏北盆地有46 口井发生裂缝性漏失,平均每口井漏失钻井液641 m3、损失时间268 h。主要原因是井下裂缝宽度不一、难以确定,造成堵漏材料粒径不匹配,大粒径堵漏材料难以进入地层,小粒径堵漏材料又容易被漏失的钻井液带走,难以在漏失孔喉处形成有效的桥架结构,导致堵漏成功率低。研发了一种针对裂缝性漏失堵漏的新方法——井下爆炸堵漏技术,主要通过堵漏工作原理、堵漏注射器、药盒、胶筒及凝胶配方等方面的研究,形成钻井井下爆炸堵漏技术。该技术主要通过井下爆炸的方式, 挤压地层裂缝,减小裂缝宽度,使堵漏材料“进得去、停得住”,有效提高裂缝性漏失的堵漏成功率,减少经济损失。该技术通过现场4 口井共6 个漏失层位的封堵应用,成功堵漏5 层、有效1 层,堵漏成功率83.33%,有效率100%。钻井井下爆炸堵漏技术为进一步完善堵漏工艺开辟了新的思路和方法。
Abstract:
Existing plugging methods are more suitable for permeable leakage. For fractured leakage, however, their one-time plugging success ratio is low and the treatment process is complex with long cycle and high cost. In recent years, for example, fractured leakage happened in 46 wells in the Subei Basin, with single-well average leakage of 641 m3 and leakage time of 268 h. The reasons for the fractured leakage are as follows. The downhole fracture width is different and cannot be determined, so the grain sizes of lost circulation materials are not matched. The lost circulation materials of large grain size cannot move into the formation easily and those of small grain size are carried easily with the lost drilling fluid. As a result, the effective bridging structure cannot be formed at the leakage pore throat, and consequently the success ratio of plugging is low. In this project, a new method was innovatively developed for plugging the fractured leakage, i.e., downhole explosive plugging technology, by investigating plugging principle, plugging syringe, chemical box, rubber cylinder and gel formula. By virtue of this technology, the formation fracture is compressed and its width is decreased, so that the lost circulation materials can “move in and stay”. Thus, the plugging success ratio of fractured leakage is improved effectively and the economic loss is reduced. This technology was applied to 6 leakage zones in 4 wells. And 5 zones are plugged successfully and 1 zone is plugged effectively, with plugging success ratio and effectiveness ratio of 83.33% and 100%, respectively. This downhole explosive plugging technology provides a new idea and method for the further improvement of plugging technologies.

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更新日期/Last Update: 2018-04-18