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页数:5页
时间:2019-05-22
《辽河油田古潜山储层钻井取心技术》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第42卷第3期石油钻探技术Vo1.42NO.32014年5月PETROLEUMDRILLIN『GTECHNIQUESMay,2014●钻井完并doi:10.3969/j.issn.1001—0890.2014.03.010辽河油田古潜山储层钻井取心技术孔志刚,于希(1-中国石油长城钻探工程有限公司工程技术研究院,辽宁盘锦124010;2.中国兵器工业集团盘锦市北方沥青股份有限公司,辽宁盘锦124010)摘要:为了提高辽河油田古潜山储层的岩心收获率及取心质量,研究了适合古潜山储层的钻井取心技术。通过分析辽河油田古潜山储层的地层特征,用排除法确定了造成单筒岩心收获率低及取心质量差的主要原因,提出
2、了相应对策。首先,优化了取心钻头,将切削齿由原来的3~5个改为1O个,采用Z3型金刚石复合片与硬质合金连接方式,设计了低冲蚀PIN;钻头水眼结构。然后,改进了取心工具,增加了隐式篮式岩心爪和引心套、内筒扶正器、堵心指示器、防堵心装置,换用内壁光滑的铝合金内筒。最后,对钻压、转速、排量等取心技术参数进行了优化。辽河油田91:2井的现场应用表明,机械钻速从0.55m/h提高至2.79rn/h,岩心收获率从51.13提高至89.97。研究结果表明,辽河油田古潜山储层钻井取心技术能有效提高机械钻速、岩心收获率和取心质量,降低井下安全风险,可推广应用于坚硬破碎地层的取心作业中。关键词:古潜山储集层取心
3、取心钻头取心工具辽河油田中图分类号:TE244文献标识码:A文章编号:1001—0890(2014)03—0050—05CoringTechniquesforBuriedHillReservoirsinLiaoheOilfieldKongZhigang,YuXi。(1.EngineeringTechnologyResearchInstituteofGWDC,Panjin,Liaoning,124010,China;2.Pan—JinNorthernAsphaltCo.,Ltd.,NorincoGroup,Panjin,Liaoning,124010,China)Abstract:Inorde
4、rtoenhancethecorerecoveryandcoringqualityforburiedhillreservoirsinLiaoheOilfield,thecoringsolutionssuitablefortheburiedhillreservoirshasbeenstudied.ThroughanalyzingthestratigraphiccharacteristicsofburiedhillreservoirsinLiaoheOilfield,themethodofexclusionwasusedtodeterminethecausesoflowcorerecoverya
5、ndpoorcoringquality,andcountermeasureswereputforward.First,thecoringbitwasoptimized.Insteadof3—5cuttingteethoriginally,theoptimizedcoringbithad10cuttingteethmadeofZ3diamondcompactoncementedcarbidebase,andportarrangementoflowerosion.Next,thecoringtoolwasimproved.Animplicitbaskettypecorecatcherandcit
6、edheartshoes,innerbarrelcentralizer,coringjamindicatorandanti—jamcoringsystemwereaddedtothecoringtool,andthesmootha—luminumalloyinnertubewasused.Finally,thetechnicalparametersofWOB,RPM,pumpingrate,etc.wereoptimized.Fieldtestin9wellsofLiaoheOilfieldindicatedtheROPhadincreasedfrom0.55m/hto2.79m/handt
7、hecorerecoveryhadincreasedfrom51.139/6to89.97.TheresultsshowedthatthecoringtechniquesforburiedhillreservoirsinLiaoheOilfieldcouldenhancepenetrationrate,corerecoveryandCO—ringquality,andreducedownholesecurit
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