资源描述：
《特低渗透砂岩油藏储层微观孔喉特征》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30卷第4期石油学报Vol.30No.42009年7月ACTAPETROLEISINICAJuly2009文章编号:025322697(2009)0420560204特低渗透砂岩油藏储层微观孔喉特征1213王瑞飞沈平平宋子齐杨华(1.西安石油大学石油工程学院陕西西安710065;21中国石油勘探开发研究院北京100083;3.中国石油长庆油田公司陕西西安710021)摘要:通过岩心样品的恒速压汞测试,对特低渗透砂岩油藏储层微观孔喉特征进行的研究结果表明,储层有效喉道半径、有效喉道体积、有效孔隙半径、有效孔隙体积
2、及孔喉比等特征参数与孔隙度、渗透率之间具有较好的相关性;对于孔隙度、渗透率较高的岩样,有效喉道、有效孔隙发育程度较高,孔喉比较低;特低渗透砂岩油藏储层孔隙结构具有中等孔隙和小喉道发育、孔喉连通性差及孔喉性质差异大的特点,开发过程中可能存在潜在的贾敏效应伤害。特低渗透砂岩油藏储层性质主要由喉道控制,喉道半径分类明显。渗透率越低,喉道半径与渗透率的相关性越好。喉道控制储层渗透性,进而决定开发难度和开发效果。关键词:特低渗透砂岩储层;孔喉特征;孔喉比;孔隙结构;特征参数;储层性质中图分类号:TE125文献标识码:ACh
3、aracteristicsofmicro2porethroatinultra2lowpermeabilitysandstonereservoir1213WANGRuifeiSHENPingpingSONGZiqiYANGHua(1.CollegeofPetroleumEngineering,Xi’anShiyouUniversity,Xi’an710065,China;2.PetroChinaExplorationandDevelopmentResearchInstitute,Beijing100083,Chin
4、a;3.PetroChinaChangqingOilfieldCompany,Xi’an710021,China)Abstract:Thefeaturesofmicro2porethroatintheultra2lowpermeabilitysandstonereservoirwereanalyzedbyusingtheconstant2ratemercuryinjectiontechnology.Theeffectivethroatradius,theeffectivethroatvolume,theeffec
5、tiveporeradius,theeffectiveporevolumeandthepore2to2throatratioarecorrelativewiththeporosityandpermeabilityofreservoirs.Fortherocksampleswithhigherporosityandpermeability,theeffectivethroatandporesarebetter,whilethepore2to2throatratioislower.Theultra2lowpermea
6、bili2tysandstonereservoirsarecharacterizedbymediumpore,finethroat,poorconnectivityofporewiththroataswellasgreatdiffer2enceinpropertiesofporeandthroat.TherewillbetheJamineffectinthedevelopmentoftheultra2lowpermeabilityreservoir.Thequalityofthiskindofreservoiri
7、smainlycontrolledbythroat,andtheradiusofthroathastheobviousclassificationfeatures.Whenthepermeabilityofreservoirgetslower,thecorrelationofthroatradiuswithpermeabilitygetsbetter.Thethroatcontrolstheperme2abilityofreservoirandalsodeterminesthedevelopmenteffecti
8、veness.Keywords:ultra2lowpermeabilitysandstonereservoir;porethroatfeatures;pore2to2throatratio;poretexture;characteristicparam2eter;reservoirproperty目前,压汞技术仍是获取储层微观孔、喉特征参数进汞,准静态的进汞过程中,汞液前
