5 : ~ ~7 6~ (2-a~ d) km 2 11 (1)4+5 (3) 30~100cm [6] (2-f~ g) (2-e) - (2-f); ( ) - A (2-a~d) 3 3

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1 GeologicalScienceandTechnologyInformation Vol.37 No.5 Sep doi: /j.cnki.dzkq : 4+5 [J] (5): : 4+5 1a1b 1a1b 2 3 (1. a. ;b ; ; ) : A A ; A ; A ; A 60~70 ; A 80~130 : ; ; ; :P :A : (2018) [1] 8~ 2 ( 7 ) [1] [2] 7 [3] [4] ; U Th K [5] : : : (BJ ) : (1990 ) @qq.com 1 : (1951 ) Liu-yiqun@263.net

5 : 4+5 55 1~1010 10 ~7 6~ 1 4+5-7 (2-a~ d) 1.7 10 4 km 2 11 (1)4+5 (3) 30~100cm 3.1 4+5 1 4+5 2 [6] 4+5 - (2-f~ g) (2-e) - (2-f); ( ) - A (2-a~d) 3 3.2 1 4+5 3.2.1 Fig.

2 5 : ~ ~7 6~ (2-a~ d) km 2 11 (1)4+5 (3) 30~100cm [6] (2-f~ g) (2-e) - (2-f); ( ) - A (2-a~d) Fig.1 Sandbodyspreadandwelsdistributionofthestudyarea Ⅰ Ⅱ % ~ (2-g) 14% ~ μm 2 ; (SY/T ) :1 (2-h);2 4+5 (2-i) 0.05~0.2 mm -

５６地质科技情报２０１８年ａｂ细砂级粉砂级晶屑凝灰岩黑色物质经激光拉曼验证为沥青质充填在凝灰质降落形成的粒间孔中元６３井２００７４３ｍｃ中砂级凝灰质砂岩黑云母吸附油充填孔隙吴４６８井２０９７７ｍｅ长石砂岩中分布的暗黄褐色荧光沥青ｕｖ耿２３９井２５４０９０ｆ长石砂岩中碎屑定向分布黏土膜吸附沥青质元１４９井

3 ５６地质科技情报２０１８年ａｂ细砂级粉砂级晶屑凝灰岩黑色物质经激光拉曼验证为沥青质充填在凝灰质降落形成的粒间孔中元６３井２００７４３ｍｃ中砂级凝灰质砂岩黑云母吸附油充填孔隙吴４６８井２０９７７ｍｅ长石砂岩中分布的暗黄褐色荧光沥青ｕｖ耿２３９井２５４０９０ｆ长石砂岩中碎屑定向分布黏土膜吸附沥青质元１４９井１９７７５４ｍｍｇ长石砂岩中硅质加大但孔隙发育元１０９井２５３７２０ｍｈ凝灰质砂岩石英颗粒发育绿泥石包膜电子探针吴４６８井２０５３３６ｍ长石砂岩绿泥石薄膜充填孔隙池６１井２６１７１ｍ１９４０５ｍｋ高岭石分布于长石粒内溶蚀孔隙周围扫描电镜定６３６井２２０７１５ｊ残余绿泥石膜形态扫描电镜元２１７井ｌ高岭石充填粒间晶间孔发育扫描电镜耿４３井２２４６３ｍｍ铁方解石充填孔隙并交代碎屑致密无孔耿２８８井２５０７５８ｍｍｎ铁白云石交代矿物颗粒并充填孔隙木３８井２０８３５６ｍｏ硬石膏孔隙式胶结宁４２井１２７７９ｍ图２研究区显微镜下砂岩与凝灰质照片Ｆｇ２ＭｃｒｏｓｃｏｐｅｐｈｏｏｇｒａｐｈｓｏｆＣｈａｎｇ４５ｓａｎｄｓｏｎｅａｎｄｕｆｆａｃｅｏｕｓｍａｅｒａｌｎｈｅｓｕｄｙａｒｅａ作用而附近保存极好的粒间孔可能主要为粒间孔隙中的凝灰质杂基被完全溶蚀所致图２ｈ由此物质源于碱性环境下凝灰质溶蚀黑云母水化所释放的Ｆｅ３Ｍｇ２８综合分析认为研究区绿泥石可见绿泥石包膜的形成与凝灰质的溶蚀可能存在关联而田建峰等７也认为绿泥石包膜是成岩早期薄膜胶结发生于早成岩Ａ期偏碱性的成岩环境并且能够抑制压实作用和胶结作用有利于原生粒间偏碱性环境下中基性凝灰质溶蚀结晶的产物叶片孔的保存状绿泥石残余包膜的发现说明绿泥石包膜的形成早于长石岩屑等的溶蚀作用图２ｈｊ石英加大３２３高岭石胶结高岭石是研究区最主要的胶结类型之一由于边部的绿泥石薄膜是在砂岩大量压实之后矿物颗凝灰质沉积可能使大量生物灭绝中成岩阶段长４粒自生加大之前形成的其大规模发育所需的铁镁５有效烃源岩大量形成产生了丰富的有机酸钾

4 5 : Zr/TiO 2-Nb/Y Fig.3 TheNb/Y-Zr/TiO2diagramoftufaceousmateri- alofchang4+5inthestudyarea 100~200 [11-12] A (2-k) ; A (2-l) (2-km) Fe 3+ Mg 2+ (2-m) (2-n) (2-o) - [9] % % 1.75% 0.24% 0.03%(5) [10] (2-c~d) Fig.5 PorositycharacteristicsofChang4+5inthestudyarea (4) ~10μm 3% ~ 6% (6-a 7) 4 (6-b); Fig.4 ContentsofcarbonatecementsandporosityofChang 4+5inthestudyarea

58 2018 a. (tr)2392540.90m;b. (uv)1702070.50m;c. 1102035.25m;d. (uv)1032418.0m;e.d(tr);f. 1032418.0m 6 Fig.

5 a. (tr) m;b. (uv) m;c m;d. (uv) m;e.d(tr);f m 6 Fig.6 Occurrencesoftherepresentativefluidinclusionsandfluorescencecolorsofoilinclusionsinthestudyarea (6-c~e) (6-f) (1) A 4.2 [13] λmax 650 mn 500mn ( )QQ= I 650 /I 500 I Q λmax ;Q λmax 7 λmax Q ~501.56nm 0.252~0.379 ; λmax Q ~520.58nm 0.280~0.642 ; λmax Q ~549.91nm 0.476~ ~130 7 λmaxq 60~70 A Fig.7 RelationshipbetweenQ andλmaxofmicro-beamspectra ; ofoilinclusions 80~130

6 第５期宋世骏等含凝灰质致密油层成岩作用与原油充注特点以鄂尔多斯盆地西北部长４５段为例５９图８研究区长４５致密储集层埋藏演化史及成岩演化序列Ｆｇ８ＴｈｅｂｕｒｅｄｅｖｏｌｕｏｎａｎｄｈｅｓｅｑｕｅｎｃｅｏｆｄａｇｅｎｅｃｅｖｏｌｕｏｎｏｆｈｅＣｈａｎｇ４５ｇｈｒｅｓｅｒｖｏｒｎｈｅｓｕｄｙａｒｅａ表１与发荧光油包裹体伴生的盐水包裹体均一温度Ｔａｂｌｅ１Ｈｓｏｇｒａｍｏｆｈｏｍｏｇｅｎｚａｏｎｅｍｐｅｒａｕｒｅｏｆｌｇｈｌｕｄｎｃｌｕｓｏｎｎｈｅｓｕｄｙａｒｅａｂｌｕｅｆ５含凝灰质储层成岩演化与原油充注序列井号宿主矿物荧光颜色盐水包裹体均一温度元１１０１０１３０研究区长４５储层颗粒接触关系主要是点元１１０１０６４０元１１０线接触和线接触石英颗粒次生加大以 Ⅰ Ⅱ 级为１０８１０罗１０３１０４４０主碳酸盐胶结以铁方解石为主次生盐水流体包裹罗１０３１０６５０体均一温度主要介于８０１３０之间综合分析认胡１５３绿色１０１７０为鄂尔多斯盆地西北部长４５致密储层经历了早胡１５３绿色１０３００胡２３６绿色１０７２０元１８６蓝绿色１０１１０元１８６蓝绿色１０８２０元１８６蓝绿色１０９８０成岩ＡＢ期及中成岩Ａ期现今处于中成岩Ａ期末期５１早成岩Ａ期云母和碱性系列的凝灰质溶蚀蚀变导致储层碱化１４绿泥石膜胶结石英溶蚀凝灰质杂基溶蚀

7 % 19.47% 5.2 B % 9.12% (1) 4+5 [17] ; A B A [18] CO 2 7 [19] (8) % (8) [20-21] 6.1 [22] A 4+5 [15] 7 ; 4+5 [16]

8 5 : (1) [5] 4+5 (3): [6] (2) 4+5 A [J]. A (1): [8] ; [J]. B [9] ; A 2006:8-89. [10] (3) (1): [11] ; ; (1): [12] [J]. [13] (4) (1): A [14] (1): ~70 ; [15] A 80~130 [17] (5) : (4): [J] [4]. [J] (6): [J] (6):15- [7]. : : (3): [M]. :. : 8 [J].. [J] (1): [J] : 7 [J] [J] (4): [16]. 4+5 [J] (1): [J] (2): [18]. 4+5 [J] (2): [19]. [J] (1): [1]. [20]. : [J] (4):526- [J] (10): [2]. [21]. [J]. [J]. : (6): [22]. (3): [3]. - [J]. : 7 [J] (3):

9 DiagenesisandOilFilingCharacteristicsof TuffaceousTightReservoir:ACaseStudyof Chang4+5 MemberinNorthwestofOrdosBasin SongShijun 1a1b LiuYiqun 1a1b ZhengQinghua 2 ZhaiYaruo 3 (1a.StateKeyLaboratoryofContinentalDynamics;1b.DepartmentofGeology NorthwestUniversityXi an710069china; 2.EnergyEngineeringInsistituteYulinUniversityYulinShaanxi719000China; 3.TheNo.4GasProductionPlantPetroChinaChangqingOilfieldCompanyXi an710016china) Abstract:ThetufaceoustightoilreservoiroftheChang4+5ofYanchangFormationinthenorthwestern OrdosBasinhastheenormouspotentialforexplorationtheweakresearchandthelitleknowledgeofthe formationmechanismofthehighporosityandpermeabilityapparentlyrestrictedtheprocessofexploration inthisarea.accordingtothereflectedlightrecognitioncastingthinsectionscanningelectron micro- scopeelectronicprobemicrobeamfluorescencespectraandbrineinclusiontemperaturemeasurement panyingbrineinclusiontemperaturewasbetween thecomprehensiveresearchindicatesthat tufaceoussedimentspromotethedevelopmentofrelativehighporosityandpermeabilityandhasthegreat significanceforthesourcerockexpelinghydrocarbon. thispaperconsidersthattheoilreservoirofthechang4+5developsakindoftufwhichnotcontains vitroclasticandcrystalchipandthatthetufaceousreservoirsarenowattheendofthemiddlediagenetic Astageexperiencingthediagenesisofacidandalkalialternating.IntheearlystageAofdiagenesisthe reservoirholecanbepreservedowingtothecementationofthechlorite'sfilmandthechargingoftheoilin earlystageinthealkalineenvironmentwhichefectivelysuppressedthemechanicalcompactionandcemen- tation.inthemiddlestageaofdiagenesis thefeldspardissolvedporeandkaoliniteintracrystalinepore expandedthereservoirspaceinacidiccondition.inthelate middlestage A ofdiagenesisthecondition changedtothealkalinegradualycarbonatelikeironcalcitecementationmadethereservoirtighter.there aretwooilfilingeventsintheoilreservoirofthechang4+5inthenorthwesternordosbasinandthey aldidnotfolowthenormalorganicmaterthermalevolution.theearlyoilfilinghappenedintheearly stageaofdiagenesiswhentheoilinclusionemitedthegreenfluorescenceandthebrineinclusiontempera- turewasbetween60-70.thelateoilfilinghappenedintheearlymiddlestageaofdiagenesiswhen theoilmaturedearlierwithmatureperiodofoilvaryingamongdiferentindividualsandhavingcharacter- isticsofalternatefiling.theoilinclusionemitsthegreenblueandblue-greenfluorescenceandtheaccom- Keywords:tufaceous;earlyoil;relativelyhighporosityandpermeabilityreservoir;tightreservoir;Or- dosbasin

4 : Fig.1 PositionofShanansaginBohaiBayBasin 12.75% 0.80~ % 2.26% 2.24% ( 2) X 10% ; ;F. ;R. ;Q. 2 Fig.2 Triangulardiagramfor

4 : Fig.1 PositionofShanansaginBohaiBayBasin 12.75% 0.80~ % 2.26% 2.24% ( 2) X 10% ; ;F. ;R. ;Q. 2 Fig.2 Triangulardiagramfor 36 4 2017 7 GeologicalScienceandTechnologyInformation Vol.36 No.4 Jul. 2017 doi:10.19509/j.cnki.dzkq.2017.0420. [J]. 201736(4):160-165. ( ) 300459) : 93 A 3000m : ; ; ; :TE122.2 :A :1000-7849(2017)04-0160-06