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时间:2020-03-28
《基于恒速压汞技术的特低-超低渗砂岩储层微观孔喉特征.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33卷第2期石油察劈沾填Vo1.33.NO.22Ol1年4月PETRoLEUMGE0LOGY&EXPERIMENTApr.,2011文章编号:i001—6112(2011)02—0206—06基于恒速压汞技术的特低一超低渗砂岩储层微观孔喉特征高辉,解伟,杨建鹏。,张创,孙卫(1.西安石油大学石油工程学院,西安710065;2.陕西延长石油(集团)有限责任公司研究院,西安710075;3.陕西延长石油(集团)有限责任公司延长油田股份有限公司南区采油厂,陕西延安716000;4.西北大学地质学系,西安710069)摘要:基于恒速压汞测试结果,对
2、鄂尔多斯盆地延长组特低、超低渗砂岩储层的微观L喉特征进行了分析,定量表征了孔喉特征参数的变化。结果表明,特低、超低渗储层的L隙半径分布特征相似,介于i00~200rn之间,峰值基本在140M1TI左右;相对于特低渗储层而言,超低渗储层的喉道分布范围更窄,小于1m的喉道含量较高,变化更为敏感,L喉半径比分布范围较宽,喉道进汞饱和度受渗透率影响较大;特低、超低渗储层孔喉特征的差异主要体现在喉道上。总体毛细管压力曲线表现出3个变化阶段,渗透率不同,各阶段受孔隙和喉道的影响程度也不同;处于中后期的超低渗储层更应注重喉道的开发。关键词:孔喉特征;储层品
3、质;恒速压汞;特低一超低渗砂岩储层;鄂尔多斯盆地中图分类号:TE348文献标识码:APorethroatcharacteristicsofextra—ultralowpermeabilitysandstonereservoirbasedonconstant—ratemercurypenetrationtechniqueGaoHui,XieWei,YangJianpeng。,ZhangChuang,SunWei(1.Collegeoy’PetroleumEngineering,Xi'anShiyouUniversity,Xi'an,Shaanx
4、i710065,China;2.ResearchInstituteofShaanxiYanchangPetroleum(Group),Co,Ltd,Xihn,Shaanxi710075,China:3.SouthernProductionPlant,Yanchang6h'lfieldCorporation,ShaanxiYanchangPetroleum(Group),(,Ltd,Yan'an,Shaanxi716000,China;4.DepartmentofGeology,No~hzaestUniversity,X",Shaanxi710
5、069,China)Abstract:Basedonconstant—ratemercurypenetrationtechnique,microporethroatcharacteristicsofex—tra——ultralowpermeabilitysandstonereservoiroftheYangchangFormationintheOrdosBasinwerean—alyzed,andthealterationsofporethroatcharacteristicparameterswerealsoquantitativelych
6、aracter—ized.Poreradiusesweresimilar,usually100~200m,andthepeakvalueswereabout140m.Com—paredtothoseintheextra—lowpermeabilityreservoir.distributionrangesofthroatintheultra—lowpermeabilityreservoirwerenarrow.Throatslessthan1umaccountedforlargeamount,andweremoresensitivetoper
7、meability.Distributionrangesofporethroatradiusratiowerewideandpermeabilityhadbiginfluenceoninputmercurysaturationofthroatinultra~lowpermeabilityreservoirThedifferences.ofporethroatcharacteristicsbetweenextra~andultra—lOWpermeabilitysandstonereservoirmainlylayinthroats.3vari
8、ationperiodswereidentifiedonoverallcapillarypressurecurves.Eachperiodwasaffectedby
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