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长井段脉冲爆燃压裂技术在 N2-4-D48井的应用

第34卷 第6期

2012年11 月石 油 钻 采 工 艺

OIL DRILLING & PRODUCTION TECHNOLOGY Vol. 34 No. 6Nov. 2012

文章编号:1000 – 7393(2012)

06 – 0077 – 03长井段脉冲爆燃压裂技术在N2-4-D48井的应用

冯国富1 安 震 2 汪长栓1 姚元文1 谢明召1

(1.北方斯伦贝谢油田技术有限公司,陕西西安 710065;2.大庆油田测试技术服务公司, 黑龙江大庆 163311)

引用格式:冯国富,安震,汪长栓,等.长井段脉冲爆燃压裂技术在N2-4-D48井的应用[J ].石油钻采工艺,

2012,34(6):77-79.

摘要:油气井长井段(大于10 m )的爆燃压裂一直是高能气体压裂领域亟待解决的难题。PFGun 长井段脉冲爆燃压裂技术能一次性处理180 m 以上长井段,满足井筒周围解堵改造、增产增注作业要求。介绍了长井段爆燃压裂技术工作原理、系统结构、技术参数以及在N2-4-D48井的现场应用过程和增产效果。采用井下P-T 仪、40臂井径测井和八扇区声波变密度测井分别对措施过程中井下压力—时间变化关系、施工前后套管内径和水泥环胶结系数进行了测试。测试结果表明,施工后油井初期产能由措施前9.6 t/d 增至22 t/d ,施工前后套管内径变化最大不超过5 mm ,水泥环胶结系数最大下降0.03,能满足安全使用要求。现场应用表明,PFGun 长井段脉冲爆燃压裂技术增产效果显著,工艺安全性好,可进一步推广应用。

关键词:长井段;爆燃压裂;增产;工艺方法;安全性

中图分类号:TE357.28 文献标识码:B

Application of exploding fracturing tools for long interval on N2-4-D 48 well

FENG Guofu 1, AN Zheng 2, WANG Changshuan 1, YAO Yuanwen 1, XIE Mingzhao 1

(1. North Schlumberger Oil?eld Technology Co. Ltd., Xi ’an 710065, China ; 2. Daqing Oil?eld Company Testing Technology Service Sub-Company , Daqing 163311, China )

Abstract: Propellant fracturing for long interval has been urgent problem in High Energy Gas Fracturing (HEGF ) filed. A long interval pulse exploding fracturing technology called PFGun can stimulate long interval up to 180 m on one run ,remove blockage around wellbore for improving production or injection . Technical principle, systemic structure, technical parameters of PFGun system and a successful field application N2-4-D 48 well were introduced . Pressure profile (p-t curve ) was recorded during deflagration event using downhole P-T instrument, inner diameter (ID ) of casing was tested using 40-arm caliper and cementation coefficient of cement ring were tested using eight radial sector bond tool before and after operation. The treatment results illustrated that N2-4-D 48 well in Daqing increased in production from 9.6 t/d to 22 t/d, changes of casing inner diameter was not more than 5 mm, the largest decline of the cement cementation coefficient 0.03, data above met safety requirements of field application. It is proved that PFGun system should be utilized further because of its significant results on stimulating production and process safety.

Key words: long interval; propellant fracturing; stimulation; operational processing;safety

作者简介: 冯国富,1965年生。1985年毕业于北京理工大学高分子材料专业,

现从事油田民爆器材研发与推广工作。电话:029-********-3102。E-mail :feng.guofu@https://www.wendangku.net/doc/ea8779264.html, 高能气体压裂(又称爆燃压裂)增产技术经历了

有壳弹、无壳弹、液体药、可控脉冲压裂装置的发展

历程[1]

。随着水平井增产改造需求增加和爆燃压裂技术的自身发展,有壳弹因其结构强度高又重新受

到重视而得到进一步发展。同时一趟管柱作业可对

多个油层进行爆燃压裂的技术越来越受到重视,长

井段脉冲爆燃压裂技术成为发展方向之一,近期出现多个相关专利[2-3]和商品化油田服务技术。如美国HTH Technical services. Inc.的 HST 系统[4],Servo-dynamics Inc.的DGPL ?/STRESSFRAC ?系统[5],两种系统均能对长井段脉冲进行施工,且井下不留任何落物,不会影响下一步油井施工,不会堵塞孔眼,不会污染地层。传统的压裂弹弊端:(1)壳体、

中心管、端盖等

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