油藏非均质性对聚合物驱影响研究VIP免费

摘要随着聚合物驱技术的不断发展，及其在现场取得的良好驱油效果，未来一段时间内聚合物驱将仍是提高采收率的主导技术,本文通过查阅大量数据，明确了聚合物驱在国内外的发展现状和趋势。由于聚合物驱是水驱后进一步提高原油采收率的三次采油技术，在不同类型油藏中均取得了较好的应用效果。聚合物驱开发过程中，油藏非均质性对聚合物驱的驱替效果有较大影响。本文也对目前世界上最为先进和广泛应用的数值模拟软件——ECLIPSE软件，进行简要研究和实际操作。针对影响聚合物驱效果的因素很多，不同因素对聚合物驱效果影响程度也有较大差异的情况，建立了单层和多层两类地质模型，应用数值模拟手段研究了聚合物性能、注采参数和大孔道等12项参数对聚合物驱效果的影响，研究结果表明，同一模型在相同工作制度和不同注采方式下，初期产油量和累积产油量存在较大差别。对于储层厚度平面非均质性油藏，厚注薄采的聚合物驱开发效果优于厚采薄注;对于渗透率平面非均质性油藏，高注低采的聚合物驱开发效果优于高采低注;对于几何形态的非均质性油藏，宽采窄注的聚合物驱开发效果优于宽注窄采。因此，合理地部署注采井网能有效地提高油藏聚合物驱的开发效果。关键词：聚合物驱；油藏非均质性；数值模拟；影响因素AbstractHorizontalwelltechnologyisoneofshalegasexplorationanddevelopmentofkeytechnologies,anddrillinghorizontalwellsintechnology,especiallyinboreholestabilityofshalegasdrillingtechnologyisshalegastechnologyresearchfocusinrecentyears,long-termhorizontalwellscostconstraintsanddevelopthecorebenefitsanddifficulties.Theexistenceofshalegashorizontaldrillinglonghorizontalsectioncollapsedduringtheproblem,theuseofoil-baseddrillingfluidisusedasadrillingfluid,butthehighercostofoil-baseddrillingfluid,affectingthedevelopmentofshalegasdrillingefficiency.ThispaperselectsChangningdistrictLongmaxishaleoutcropastheresearchobject,thefirstuseofphysicalandchemicalanalysisandX-raydiffractionanalysisofthebasicphysicalcharacteristicsofshale,andthenanalyzedthemechanismofinducedcollapsecombinationshalerockmechanics,clarifiedshaleblockandsuppressanti-collapsemechanismlimitsproposedtoblockwatergravityandcapillaryporewatertopreventtransferofhydrostaticpressurepointofview.Theexperimentalstudyoftheeffectsofthemineralcompositionoftheclayshalehydrationandanti-swellingregularcategoriesshalehydrationinhibitorlawexpandedclaycrystallayer,thencollapsepressuredrillingshaleformationshavebeenstudied,andthepressuretocollapse,collapsecycleoptimizationmethodfordrilling,includingtheoptimizationofdrillingfluidcomponents,optimizeddrillingfluiddensityoptimizethedrillingposition,optimizingdrillinglonghorizontalsectionofthecycleandsoon.Keywords:Shale;horizontalwells;drillingfluid;anti-collapse目录第1章概述..............................................................................................91.1研究目的与意义...........................................................91.2聚合物驱数值模拟技术研究国内外现状..........................................................................................................................121.3本文的研究内容........................................................12第2章储层非均质性研究....................................................92.1层内非均质性研究....................................................92.2层间非均质性研究.................................................122.3平面非均质性研究.................................................12第3章聚合物驱油机理及数学模型.....................163.1聚合物驱油机理........................................................163.2聚...