一种高强度成塞暂堵剂
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摘要
注水泥塞施工设备多、成本高,深井、高温井注水泥塞安全风险较为突出,因此研究一种强度高、配制简单、泵送方便、风险较小的高强度成塞暂堵剂具有较大的价值。开展了高效成塞暂堵剂核心材料胶凝剂、悬浮剂的优选和活性剂研制,通过对文献查阅研究,进行了大量室内实验,研究形成了高强度成塞暂堵剂GQ-1体系。该体系密度可调节范围大(1.50~1.90 g/cm3)、浆体稳定性好,流动度、流性指数、稠度均在合理范围内,与钻井液相容性好,成塞强度高。该体系可用钻井液循环系统、加重装置配制,钻井液泵注替。研究成果在洋渡-H2等2井次进行了试验,施工顺利,试验井回接固井后分别试压63.3、64.3 MPa合格。试验的成功为该体系推广应用提供了技术支撑。
Many tools and facilities are required in expensive cement plug placement.Cement plug placement in deep and high temperature wells is of high safety risk.To minimize this risk and address the problems associated with cement plug placement,a high strength temporary plugging agent is required.The temporary plugging agent should have such properties as high strength,simplicity in preparing and convenience in pumping.Laboratory experiments have been conducted to select the core materials such as gelling agent and suspending agent,and to develop the required activator.Based on literature survey and laboratory experiments,a high strength temporary plugging agent GQ-1 was developed.GQ-1 has a wide density range(1.50-1.90 g/cm~3) and stable properties.The mobility,flow index and consistency of GQ-1 are all in reasonable ranges.GQ-1 is compatible with commonly used drilling fluids,and the plug formed by GQ-1 has high strength.GQ-1 can be mixed with mud circulation and mixing systems,and pumped with drilling pumps.GQ-1 has been applied on two wells(Well Yangdu-H2,for instance) with great success.Pressure test on the plugs formed by GQ-1 in the two wells showed 63.3 MPa and 64.3 MPa,which were qualified.Success of the application on the two wells provided a technical support for the spreading of GQ-1.
Many tools and facilities are required in expensive cement plug placement.Cement plug placement in deep and high temperature wells is of high safety risk.To minimize this risk and address the problems associated with cement plug placement,a high strength temporary plugging agent is required.The temporary plugging agent should have such properties as high strength,simplicity in preparing and convenience in pumping.Laboratory experiments have been conducted to select the core materials such as gelling agent and suspending agent,and to develop the required activator.Based on literature survey and laboratory experiments,a high strength temporary plugging agent GQ-1 was developed.GQ-1 has a wide density range(1.50-1.90 g/cm~3) and stable properties.The mobility,flow index and consistency of GQ-1 are all in reasonable ranges.GQ-1 is compatible with commonly used drilling fluids,and the plug formed by GQ-1 has high strength.GQ-1 can be mixed with mud circulation and mixing systems,and pumped with drilling pumps.GQ-1 has been applied on two wells(Well Yangdu-H2,for instance) with great success.Pressure test on the plugs formed by GQ-1 in the two wells showed 63.3 MPa and 64.3 MPa,which were qualified.Success of the application on the two wells provided a technical support for the spreading of GQ-1.
引文
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[15]聂勋勇.隔断式凝胶段塞堵漏机理及技术研究[D].西南石油大学,2010.NIE Xunyong.Study of plugging mechanism and technology of separating-type gel slug[D].Southwest Petroleum University,2010.
[2]王建永.WS-Ⅰ型超低渗暂堵剂提高调整井固井质量可行性[J].环球市场信息导报,2013(23):122.WANG Jianyong.Feasibility of improving cementing quality of adjustment well with extra low permeability temporary plugging agent WS-Ⅰ[J].Global Market Information Report,2013(23):122.
[3]张艳英.低温油藏调剖用聚合物凝胶体系研究及应用[D].西南石油大学,2012.ZHANG Yanying.Study and application of gel system for low-temperature reservoir profile control[D].Southwest Petroleum University,2012.
[4]BOYCE D.BURTS,BOYCE DONALD BURTS,FREDDIE L.SABINS,et al.Primary well cementing with downhole mixed epoxy[P].US20080289824.
[5]大庆油田有限责任公司.一种气井回接固井用暂堵装置[P].CN 201120027107.7.Daqing Oilfield Co.Temporary plugging device for gas well tieback cementing[P].CN 201120027107.7.
[6]林伟民,袁维汉,毕海峰,等.φ139.7 mm套管修复固井前的射孔段暂堵技术[J].钻采工艺,2003,26(6):7-9.LIN Weimin,YUAN Weihan,BI Haifeng,et al.The temporary seal technology of perforated interval beforeφ139.7 mm casing cementing[J].Drilling&Production Technology,2003,26(6):7-9.
[7]王成文,王瑞和,陈二丁,等.高渗透水泥防砂暂堵型前置液体系研究[J].钻采工艺,2007,30(1):98-100.WANG Chengwen,WANG Ruihe,CHEN Erding,et al.Research on temporary ahead fluid system used in high permeability cement sand control technology[J].Drilling&Production Technology,2007,30(1):98-100.
[8]SVINDLAND,ALF.Method and plugging material for reducing formation fluid migration in wells[P].EP1218621.
[9]任占春.采油作业中暂堵技术的研究与应用[C].中国石化油气开采技术论坛论文集,2005:484-497.REN Zhanchun.Study and application of temporary plugging technology in oil production operation[C].Proceedings of Sinopec Forum on oil and gas exploration technology,2005:484-497.
[10]SVINDLAND,ALF.Particulate matter plug for plugging a well[P].United States Patent:6715543.
[11]黄柏宗.紧密堆积理论优化的固井材料和工艺体系[J].钻井液与完井液,2001,28(6):4-12.HUANG Baizong.New cementing materials and technique developed on the concept of high packing density[J].Drilling Fluid&Completion Fluid,2001,28(6):4-12.
[12]任旭斌.保护煤储层油溶性暂堵材料评价[C].第四届湖北省土木工程专业大学生科技创新论坛论文集,2011:154-157.REN Xubin.Evaluation of oil soluble temporary plugging materials of coal reservoir protection[C].Proceedings of the fourth scientific and technological innovation forum on civil engineering for Hubei university students,2011:154-157.
[13]王姹娣,李未蓝,周江,等.一种用于酸化压裂的新型胶凝体系[J].国外油田工程,2000(9):8-10,16.WANG Chadi,LI Weilan,ZHOU Jiang,et al.A new type of gelsystem used for fracturing[J].Foreign Oilfield Engineering,2000(9):8-10,16.
[14]杨振杰.胶结界面的微观结构与界面胶结强度强化机理研究[D].西南石油大学,2002.YANG Zhenjie.Study on the microstructure of bonding interface and reinforcement mechanism of interfacial bonding strength[D].Southwest Petroleum University,2002.
[15]聂勋勇.隔断式凝胶段塞堵漏机理及技术研究[D].西南石油大学,2010.NIE Xunyong.Study of plugging mechanism and technology of separating-type gel slug[D].Southwest Petroleum University,2010.