钻井液论文.docx
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钻井液论文.docx
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钻井液论文
I
水基成膜钻井液体系的研究与应用
摘要
目前,随着金刚石绳索取心工艺在地质取心钻探工程中的普及,钻井液与绳索取心工艺相匹配的问题也随之凸显出来,诸如钻井液的流变性能不满足绳索取心工艺对钻井液的要求、钻遇复杂地层尤其是强水敏性地层时,传统钻井液体系不能达到较好的护壁效果,从而导致孔内垮塌等问题。
在石油钻探工程中出现了新型水基钻井液成膜技术理论,这类技术理论强调钻井液的成膜性能,能较好的解决复杂地层的护壁问题。
该理论认为,通过在水基钻井液中加入一种或几种具有成膜性能的处理剂,使钻井液能在泥页岩等这类强水敏性地层孔壁上形成一种高质量的膜,减弱或阻止钻井液滤液侵入地层,从而维持孔壁稳定,防止孔内事故的发生。
因此,将水基钻井液成膜技术与理论引入到地质取心钻探工程中,并加以研究,使之形成与绳索取心工艺相匹配的钻井液体系,以期解决这些问题是很有必要的。
本文从金刚石绳索取心钻探工艺对钻井液的要求出发,运用水基钻井液成膜理论,通过大量正交试验,研究和开发了三种水基成膜钻井液体系,分别是:
植物胶成膜钻井液体系、硅酸盐成膜钻井液体系和聚合物成膜钻井液体系,这三种水基成膜钻井液体系具有良好的成膜性能,对水敏性地层具有较强的抑制能力。
同时运用回归分析方法,找出了在这三种钻井液体系中,标准岩心膨胀量与时间之间的关系。
植物胶成膜钻井液体系的研究采用正交试验的设计和分析方法,使用了KL植物胶作为成膜主剂,并通过与成膜助剂PAM、PVA以及Na2SiO3的复配试验,筛选出性能较好的复配方案,形成对水敏性和破碎性地层有较强抑制能力的植物胶成膜钻井液体系。
硅酸盐成膜钻井液体系的研究同样采用正交试验的设计和分析方法,使用硅酸钠作为成膜主剂,并通过与成膜助剂PAM和抑制剂KCl的复配试验,筛选出性能较好的复配方案,形成对强水敏性地层有较强抑制、胶结能力的硅酸盐成膜钻井液体系。
聚合物成膜钻井液体系包括XY系列聚合物成膜钻井液体系和DP聚合物成膜钻井液体系两大部分。
XY系列聚合物成膜钻井液体系使用了丙烯酸类聚合物作为成膜主剂,并通过与成膜助剂WST-100和S-1的复配试验,筛选出性能较好的复配方案。
DP聚合物成膜钻井液体系使用了聚合醇类聚合物作为成膜主剂,并通过与成膜助剂P和成膜助剂C的复配试验,筛选出性能较好的复配方案。
这两种聚合物成膜钻井液体系对水敏性地层都有较好的综合护壁效果。
植物胶成膜钻井液体系在四川地勘局113地质队所属古叙煤田石宝矿段ZK003孔和ZK6403孔和重庆巫山二郎庙滑坡勘察工程的BZK2孔和BZK19孔中得到应用,较好的解决了复杂地层的护壁问题和岩心采取率的问题,取得了较好的经济效益。
聚合物成膜钻井液体系在四川省木里县牦牛坪铜矿勘察项目的ZK0409孔和ZK0807孔和四川省筠连县孔雀乡塘坝煤田勘察中的ZK11-1和ZK9-1孔得到应用,较好的解决了水敏性地层的护壁问题和钻井液与绳索取心工艺的匹配问题,取得了良好的应用效果。
关键词:
钻井液成膜绳索取心水敏地层
ResearchandApplicationOfWater-basedFilmForming
Atthepresenttime,withpopularizationofthediamondwire-linecoringdrillingtechnologyingeologycoredrillingfiled,thematchproblemofdrillingfluidanddiamondwire-linecoringdrillingtechnologyhasexposednow,suchasrheologybehaviorofdrillingfluidisn’tsatisfactiontherequirementofdiamondwire-linecoringdrillingtechnologytodrillingfluid,whendrillingcomplexstrataespeciallythewater-sensitivestrata,thetraditionaldrillingfluidsystemcan’tachieveagoodeffectofwallprotection,thusleadtoanholecollapsingaccidentandotherissues.
Water-basedfilm-formingdrillingfluidtechnologyisbasedonthefilm-formingtheoryofwater-baseddrillingfluid,whichproposedinrecentyears.Accordingtothistheory,byaddingoneorseveralkindsoffilmformerintowater-baseddrillingfluid,soenableitcanformakindofhighqualityfilmontheholewallofstrongwatersensitivityformationsuchasshaleetc.Thusweakenorpreventfiltrateinvasiontheformation,maintenancethestabilityofholewall,andavoidtheoccurrenceofholeaccident.Therefore,it’sverynecessarytointroducethefilm-formingtheorytogeologycoredrillingfiledandstudyit,giveitamatchsystemforwire-linecoringdrillingtechnology,finallysolvetheseproblems.
Thisarticlefromthebasicrequirementsofdiamondwire-linecoringdrillingtechnologytodrillingfluid,usethefilm-formingtheoryofwater-baseddrillingfluid,andthroughamassoforthogonaltests,researchanddevelopthreewater-basedfilm-formingdrillingfluidsystems:
thefilmformingdrillingfluidsystemofgum,thefilmformingdrillingfluidsystemofsilicateandpolymerfilmformingdrillingfluidsystem.Thesethreedrillingfluidsystemhaveagoodfilmperformanceandstrongrestrainabilitytothewater-sensitivestrata.Meanwhile,byusingtheRegressionAnalysisMethod,findingouttherelationshipbetweenexpansionamountofthestandard-coreandthetime.
Forresearchthefilmformingdrillingfluidsystemofgum,adoptingthedesignandanalysismethodoforthogonaltests,usingtheKLgumasthemainfilmingagent,throughcomplexformulationtestsoftheadditivefilmingagentPAM,PVAandNa2SiO3,selectedthebetterperformancecomplexformulationplan.Formfilmformingdrillingfluidsystemofgumwhichhasastrongrestrainabilitytowater-sensitiveandbrokenstrata.Researchofthethefilmformingdrillingfluidsystemofsilicatealsoadoptingthedesignandanalysismethodoforthogonaltests,usingtheSodiumSilicateasthemainfilmingagent,throughcomplexformulationtestsoftheadditivefilmingagentPAMandinhibitorKCl,selectedthebetterperformancecomplexformulationplan.Formfilmformingdrillingfluidsystemofgumwhichhasastrongrestrainabilitytowater-sensitivestrata.
Polymerfilmformingdrillingfluidsystemincludingtwoparts,whicharetheXYseriesofpolymerfilmformingdrillingfluidsystemandDPpolymerfilmformingdrillingfluidsystem.XYseriesofpolymerfilmformingdrillingfluidsystem,usingtheacrylicpolymerasthemainfilmingagent,throughcomplexformulationtestsoftheadditivefilmingagentWST-100andS-1.SelectedthebetterperformancecomplexformulationplanDPpolymerfilmformingdrillingfluidsystemusingthepolyalcoholpolymerasthemainfilmingagent,throughcomplexformulationtestsoftheadditivefilmingagentPandadditiveC.selectedthebetterperformancecomplexformulationplan.Thistwokindsofpolymerfilmformingdrillingfluidsystemhaveagoodsyntheticwallprotectedeffectstothewater-sensitivestrata.BypracticalapplicationwithfilmformingdrillingfluidsystemofguminZK003andZK6403ofGu-XuCoalfieldShi-BaoOreSection,whichbelongtotheGeologicalProspectingBureauof113Team.AndalsoinBZK2andBZK19oflandslideInvestigationProject,whichareintheErlangTempleofChongqingWushan.Solvedtheproblemofwallprotectionandtherateofcorerecoveryincomplexstrata.
ThepolymerfilmformingdrillingfluidsystemappliedinZK0409andZK0807ofCopperInvestigationProject,whichareinMuliMao-nv-pingofSichuan.AndalsoappliedinZK11-1andZK9-1ofTangbaCoalfield,whichisinJunlianofSichuan.Solvedtheproblemofwallprotectioninwater-sensitivestrataandmatchproblembetweendrillingfluidanddiamondwire-linecoringdrillingtechnology,goodapplicationeffectisobtained.
Keywords:
drillingfluidfilm-formingwire-linecoringwater-sensitivestrata
目录
摘要................................................................................................................1
Abstract........................................................................................................2
目录.................................................................................................................4
第1章引言................................................................................................6
1.1选题依据及研究意义...............................................................................6
1.2国内外研究现状......................................................................................6
1.2.1水基成膜钻井液技术与理论现状........................................................2
1.2.2水基成膜钻井液成膜质量的评价方法研究现状................................3
1.2.3成膜技术的实现....................................................................................4
1.3论文研究内容和技术路线.....................................................................5
1.3.1论文研究主要内容................................................................................5
1.3.2技术路线................................................................................................6
第2章水基成膜钻井液配制步骤及评价方法.......................................8
2.1钻井液配制基本步骤.............................................................................8
2.2水基成膜钻井液成膜效果的评价方法..................................................9
第3章植物胶成膜钻井液体系的研究...................................................12
3.1植物胶成膜钻井液的配制方案.............................................................12
3.1.1植物胶钻井液概述..............................................................................12
3.1.2植物胶成膜钻井液配制方案..............................................................13
3.2植物胶成膜钻井液复配方案..................................................................15
3.2.1植物胶成膜钻井液复配方案..............................................................15
3.2.2标准岩心膨胀试验..............................................................................18
3.2.3植物胶交联试验..................................................................................20
3.3小结........................................................................................................22
第4章硅酸盐成膜钻井液体系的研究....................................................23
4.1硅酸盐成膜钻井液的配制......................................................................23
4.1.1硅酸盐成膜钻井液概述......................................................................23
4.1.2硅酸盐成膜钻井液的配制理论理论依据..........................................24
4.1.3硅酸盐成膜钻井液的配制方案..........................................................24
4.2硅酸盐成膜钻井液的复配方案..............................................................25
4.2.1硅酸盐成膜钻井液复配方案..............................................................26
4.2.2标准岩心膨胀试验.............................................................................27
4.3小结..........................................................................................................28
第5章聚合物成膜钻井液体系的研究......................................................29
5.1聚合物成膜钻井液的概述.....................................................................29
5.2XY系列聚合物成膜钻井液体系的研究...............................................30
5.2.1XY系列聚合物成膜钻井液配制方案................................................32
5.2.2XY系列聚合物成膜钻井液复配方案................................................36
5.2.3XY系列聚合物最佳复配方案综合性能............................................41
5.4小结...........................................................................................................46
第6章工程应用.........................................................................................47
6.1植物胶成膜钻井液体系的应用................................................................47
6.1.1煤田勘察中的应用..................................................................................48
6.1.2地质灾害勘察工程中的应用.................................................................48
6.2聚合物成膜钻井液体系的应用............................................
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