欢迎来到天天文库
浏览记录
ID:56101389
大小:688.79 KB
页数:7页
时间:2020-06-04
《深层高压低渗砂岩油藏储层微观孔喉特征:以东濮凹陷文东油田沙三中段油藏为例.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、第26卷第4期现代地质V0l_26No.420l2年8月GEOSCIENCEAug2012深层高压低渗砂岩油藏储层微观孔喉特征以东濮凹陷文东油田沙三中段油藏为例王瑞飞,吕新华,国殿斌,苏道敏(1.西安石油大学石油工程学院陕西西安710065;2.中国石化中原油田分公司,河南濮阳457000)摘要:为深入探讨深层高压低渗透砂岩油藏储层微观孔喉特征,开展了岩心样品的恒速压汞测试。结果表明,储层孔道大小及分布性质差异不大,孔隙半径呈正态分布,主峰分布在100~300m;喉道半径是控制储层性质的主要因素,渗透率与喉道半径的相关
2、性好于其与孔隙半径的相关性。储层有效喉道半径、有效孔隙半径、有效喉道体积、有效孑L隙体积、有效孑L喉半径比等孔喉特征参数与物性参数具有较好的相关关系。高渗透率岩样的有效孑L喉半径比较低,且有效孑L喉半径比分布频率较高。渗透性越好,孑L喉半径比越低,且其分布越集中。分析认为,恒速压汞的孑L喉特征参数中排驱压力(P)、中值压力(P。)、最大进汞饱和度(s)小于常规压汞的,最大连通孔喉半径(R⋯)、中值半径(r)大于常规压汞的。相对于常规压汞,恒速压汞获得的孔喉特征参数更准确。关键词:深层高压低渗透砂岩储层;微观孔喉特征;孔
3、喉半径比;恒速压汞;孔喉参数;储层性质中图分类号:TEl22.2文献标志码:A文章编号:1000—8527(2012)04—0762—07CharacteristicsofMicro-poreThroatinHighPressureandLow·PermeabilitySandstoneReservoirofDeepSection:TakingtheMiddleoftheThirdMemberofShahejieFormationinWendongOilfield,DongpuSagasanExampleWANGRui
4、—fei,LUXin—hua,GUODian—bin,SUDao。min(1.CollegeofPetroleumEngineering,Xi'anShiyouUniversity,Xi'an,Shaanxi710065,China;2.ZhongyuanOilFieldCompany.SINOPEC.Puyang,Henan457000.China)Abstract:Thefeaturesofmicro—porethroatinhighpressureandlow—permeabilitysandstonereser
5、voirofdeepsec—tionwereanalyzedbyusingtheconstant·ratemercuryinjectiontechnology.Theresearchshowstherearelittledifferenceinthepore’Ssizesanddistribution,theporeradiusisunimodaldistribution,andthemainpeakisfrom100Ixmto300txm.Throatradiusisthemainfactorthatcontrols
6、thereservoirproperty.Therelationbetweenthepermeabilityandthethroatradiusisbetterthanthatbetweenitandtheporeradius.Thereisbettercorrelationbe—tweenthereservoirpropertyandtheporethroatparameterssuchastheeffectivethroatradius,poreradius,throatvolume,porevolume,andp
7、ore—to—throatradiusratio.Whenitcomestothehighpermeabilitysandstonesample,theeffectivepore—to—throatradiusratioislow,anditsdistributionfrequencyishigh.Thebetterthepermeabilityis,thelowerthepore—to—throatradiusratiois,andthemoreconcentratedthedistributionofthepore
8、—to—throatra—diusratiois.It’Sanalyzedthatintheporethroatparametersoftheconstant—ratemercuryinjection,thenumericalvaluessuchasthedisplacementpressure(pT),themedianpres
此文档下载收益归作者所有