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《定北区块抗高温钻井液体系优化.pdf》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43卷第12期探矿工程(岩土钻掘工程)Vo1.43No.122016年12月ExplorationEngineering(Rock&SoilDrillingandTunneling)Dec.2016:23—27定北区块抗高温钻井液体系优化牛似成,王锦昌,袁立鹤(中石化华北油气分公司石油工程技术研究院,河南郑州450006)摘要:定北区块储层深埋温高导致常规钻井液体系失效且复杂情况多发,研制一套抗高温钻井液体系已成为解决定北区块钻井复杂情况多发的重要途径。总结分析定北区块钻遇复杂情况及钾铵基钻井液体系性能测
2、试结果,明确了钻井液优化方向——抗高温抑制性、稳定性、降滤失性和封堵能力。针对目前现场常用多种抗高温钻井液处理剂开展了流变性、滤失性、封堵性、润滑性等性能测试实验,优选SMC和SPNH作为抗高温降滤失剂、KC1和聚胺作为抗高温抑制剂、HQ一10作为抗高温封堵剂、白油及石墨作为抗高温润滑剂、SF一1作为抗高温稀释剂,并得出最佳土粉含量为4%,最终得到了抗高温钻井液体系配方。室内性能评价实验表明,该抗高温钻井液体系在180℃热滚72h后粘度、切力及失水仍满足设计要求,且抗NaC1及CaC1污染分别达到10%和4
3、%,储层岩心伤害渗透率恢复值可达80%以上。定北抗高温钻井液配方的形成将为定北区块安全高效钻进提供保障。关键词:抗高温钻井液;钻井液处理剂;定北区块中图分类号:TE254文献标识码:A文章编号:1672—7428(2016)12—0023—05OptimizationofHighTemperature-resistingDrillingFluidinDingbeiBlock/NIUSi—cheng,WANGfin—chang,YUAN丘一he(PetroleumEngineeringandTechnolog
4、yResearchInstituteofNoahChinaBranch,SINOPEC,ZhengzhouHenan450006,China)Abstract:ThefailureofconventionaldrillingfluidsystemandmultiplecomplexsituationscausedbydeepreservoirwithhightemperatureinDingbeiblock,itisnecessarytodevelopasetofdrillingfluidwithhight
5、emperaturetolerance.Throughanalyzingtheessentialsofwelldrillingincidentandthepropertiesofpotassiumammoniumbaseddrillingfluid,itisclearthatthedrillingfluidshouldbeimprovedinhightemperatureinhibition,stability,filtrationreductionandsealingability.Alotofhigh-
6、temperaturedrillingtreatmentagentshavebeentestedinrheology,filtration,sealingandlubrication,SMCandSPHNarechosenasantihightemperatureflirtationreducer,KC1andpolyamineasantihightemperatureinhibitor,HQ一10asantihightemperaturepluggingagent,whiteoilandgraphitea
7、slubricant,SF一1asantihightemperaturediluent;theappropriatebentonitecontentisdeterminedtobe4%.thehightemperaturedrillingfluidsystemformulaisfinallyobtained.Thelaboratoryevaluationexperimentshowsthattheviscosity,shearandwaterlossofthishi曲temperaturedrillingf
8、luidsanstillmeetthedesignrequirementsafter180~Chotrollingfor72handanti-contaminationofNaC1andCaC12are10%and4%respectively.thepermeabilityrecoveryrateofdamagedreservoircorecanreachmorethan80%.Thishightemperatu
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