第33卷第5期 2016年9月
钻井液与完井液
DRILLINGFLUID&COMPLETIONFLUID
doi:10.3696/j.issn.1001-5620.2016.05.026
Vol.33 No.5 Sept.2016
水平井出水段高强度封堵配套工艺技术
于永生，齐行涛，廖翰明，刘贺
（大港油田石油工程研究院，天津300280）
于永生等，水平井出水段高强度封堵配套工艺技术[J]钻井液与完井液，2016，33（5)：124-128
要针对目前水平井出水段堵水作业的需求，研制出了适合水平井堵水的触变膨账型高强度堵剂及分段注入封堵工摘要
堵剂性能评价结果表明。该触变膨账型高强度堵剂具有较强的触变性，流动切力为10～15kPa，适用温度为30～120 艺
C。抗压强度大于13MPa，稠化时间大于6h，围化后体积膨胀1.0%1.5%，解决了常用凝胶类堵剂强度低，堵水有效率低、有效期短等问题，克服了常用水泥类堵剂在水平段易与压井液混相及安全性差的间题，实现了对水平井出水段安全可靠及长效封堵，研究了用于堵剂注入过程中保护堵剂投塞的自降解溶胶，有效防止堵剂注入过程中与压并液混相，优选了堵剂分段注入的配套工具，实现对出水段分段封堵。载至目前，该水平并分段堵水技术在大港、青海等油田完成水平井堵水现场应用5井次，施工成功率为100%，累计增产原油量为5849t，天然气量为1.4×10°m，证明了该水平井分段堵水工艺其有较高的可靠性和长效安全性。
关键词水平并；堵水：触变性堵剂：膨胀性堵剂；高强度堵剂；自降解溶胶；分段封堵
中图分类号：TE358.3
文献标识码：A
文章编号：1001-5620（2016）05-0124-05
Technologies for Strengthened Shutoff of Water Producing Sections of a Horizontal Well
YU Yongsheng, QI Xingtao, LIAO Hanmin, LIU He
(Petroleum Engineering Research Institute of Dagang Oilfield,Tianjin300280)
eeooesoaeaeaeaseia been developed to satisfy the needs of water shutoff operation in horizontal wells. Laboratory evaluation showed that the water shutoff eaaeeseoaeoa compressive strength of the water shutoff agent was greater than 13 MPa, and the thickening time was longer than 6 h. The volume of the water shutoff agent after solidification expanded by 1.0%-1.5%. As a high strength water shutoff agent, it increases the efficiency of water shutoff, prolongs the life of water shutoff, and overcomes the problems often encountered in horizontal section such as the mixing ofcement water shutoff agent andkill mud, and poor application safety of otherwater shutoff agents commonly available.A self-degradable sol was developed to protect the water shutoff agent plug from being mixed with kill mud during injection. Tools for staged injection of water shutoff agent were selected for the staged shutoff of the water producing sections. This technology has been successfully applied on 5 wells in Dagang Oilfield and Qinghai Oilfield, with oil and gas production increased by 5 849 t and 1.4 × 10° m in total,respectively, demonstrating the reliability and long-term safety of the technology.
Key words Horizontal well; Water shutoff; Thixotropic water shutoff agent; Expandable water shutoff agent; High strength water shutoff agent; Self-degradable sol; Staged shutoff
水平井已成为各类油藏提高开发效果的主要手段之一，但水平井产水严重影响水平井产能的发挥，受井型和完井方式特殊性的影响，水平井比常规直并更容易产水，如果堵水不及时，出现水突破之后
含水量上升，产油量会大幅降低，严重影响了水平井的开发效果。常规直井常用的堵水技术在水平井适应性差，水平井产水成为影响水平井应用效果的瓶颈问题之一。目前可用的堵剂类型有限，聚合物
基金项目：大港油田公司课题“油水井新型封堵体系及封堵工艺研究与应用”（20140207)。
第一作者简介：于永生，高级工程师，1968年生，毕业于西安石油大学，主要从事调剖堵水技术的研究与服务工作。
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