Table1 Statisticsofporetypesofchang7tightsandstone injiyuanarea /% /% % 0.77% % ( 7 2) Fig.1

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1 GeologicalScienceandTechnologyInformation Vol.36 No.1 Jan doi: /j.cnki.dzkq : 7 [J] (1): : 7 1a 1b (1. a. ;b ; ; ) : 7 T 2 T 2 T 2 T 2 T 2 7 T 2 T % 50% 37.9% : ; ; ; :TE :A : (2017) [1] 1 7 ( [2-7] 1) 30.66% [8] 34.71%19.32% % [9] 7 (1.57%) (4.21%) (1.87%) (4.66%) (1.18%) % μm %( 1) [10-11] 7 : : : (2008zx ) : (1988 gw1988@163.com ) wan-

184 2017 1 7 Table1 Statisticsofporetypesofchang7tightsandstone injiyuanarea /% /% 7 0.77 1.12 0.08 0.14 2.11 227 1.12% 0.77% 7 1 15.31% ( 7 2) Fig.

2 Table1 Statisticsofporetypesofchang7tightsandstone injiyuanarea /% /% % 0.77% % ( 7 2) Fig.1 Classificationplotforchang7tightsand- stoneinjiyuanarea 2 7 Table2 Materialcomponentforsandstonesofchang7tightsandstoneinJiyuanarea φb / % T 2 T 2 [12-13] H ( ) H [19] T 2 2 T 2 T 2 2 : T 1 T 2 ; T 2 T 2 : 1 T 2 =ρ S V :T 2 ; ρ ;S/V S(t) : S(t)= Aiexp (-t/t 2i ) T 2 :T 2i i T 2 ;A i T 2i (S/V) (r) T 2 (T 2 ) T 2 (T 2 ) [14-18] T 2 (Y m) Fig.2 T 2 mapofdiferenttypefluidinchang7tightsandstone

1 : 7185 ; T 2 T 2 T 2 T 2 (46.3%) T 2 (38.5%) (7.6%) ( 3-a) ( 3- (7.6%) [20] b) ( 4-a) T 2 ( 4-a) ( 6) ( 4-b) T 2 7~15 ms P c P c 2.2.2 ( 4-c) ( 5-a) T 2 T 2 ( 5-b) :1 T 2 ( 5-c) ;2 P c T 2 40% T 2 ;3 7 T 2 T 2 T 2 T 2 T 2 3 7 T 2 Fig.

3 1 : 7185 ; T 2 T 2 T 2 T 2 (46.3%) T 2 (38.5%) (7.6%) ( 3-a) ( 3- (7.6%) [20] b) ( 4-a) T 2 ( 4-a) ( 6) ( 4-b) T 2 7~15 ms P c P c ( 4-c) ( 5-a) T 2 T 2 ( 5-b) :1 T 2 ( 5-c) ;2 P c T 2 40% T 2 ;3 7 T 2 T 2 T 2 T 2 T T 2 Fig.3 T 2 mapofchang7tightsandstoneinjiyuanarea Fig.4 4 T 2 (Y m 7 2 ) NMR T 2distributionandmicroscopicporestructurecharacteristicofhigh-right-peaktype

5% 6 T ( 8) 30%~60% 2 Fig.6 MovablefluidT 2 mapcomparisonhistogramsof 41.3% diferentsandstonereservoir 50% 37.

4 T 2 (C m 7 1 ) Fig.5 NMR T 2distributionandmicroscopicporestructurecharacteristicofhigh-left-peaktype ; % ~ 65.5% 6 T ( 8) 30%~60% 2 Fig.6 MovablefluidT 2 mapcomparisonhistogramsof 41.3% diferentsandstonereservoir 50% 37.9% 7 7 T 2 Fig.7 T 2 mapofchang7tightsandstoneinjiyuanareabeforeandaftercentrifugation 3 (1) 7 ; ; 2.11%; (2) T 2 T T 2 Fig.8 Movablefluiddistributionrangehistogramsofchang7 T 2 tightsandstoneinjiyuanarea T 2

5 1 : 7187 (3) 7 T [9] 2 T 2 7~15ms 16.8% ~65.5% 41.3% (4): : [1]. [13]. T2 [J] (4): [2]. : [14]. T2 [M]. : 2011: [3]. [M]. : 2011: [4]. 7 [16]. [J]. [J]. :G (4): (3): [5]. [J] (6): [J] (4): [6]. [J]. : (12): [J] (6): [7]. [19]. [J] (4): [D]. : [10]. [J] (3): [11]. : [J]. [12]. [J] (4): [J] (4): [J] (1): [15]. [J] (4): [17]. [18]. [J] (3): [9]. [20]. 6 [J]. : [J] (8): (3): CharacteristicofMovableFluidforTightSandstoneReservoir inordosbasin:acaseofchang7oilreservoir ofyanchangformationinjiyuanarea Wang Wei 1a1b2 NiuXiaobing 3 LiangXiaowei 2 Dan Weidang 2 (1a.StateKeyLaboratoryofContinentalDynamics;1b.DepartmentofGeologyNorthwest UniversityXi an710069china;2.changqingoilfieldcompanyoilproductionplantno.1 Yan anshaanxi716000china;3.researchinstitutionofpetroleum Explorationand DevelopmentPetroChinaChangqingOilfieldCompanyXi an710021china) Abstract:Movablefluidsaturationisthekeyfactortoevaluatethepotentialoftightsandstonereservoir.It hascharacteristicsofhighcontentofinterstitialmaterialporenarrowandpoorphysicalpropertyinordos Basin.Toresearchthe movablefluidoftightsandstonethisarticleusesnmrtotestsamplesoftight sandstoneinjiyuanareaofordosbasin.resultshowsthatdiferentt 2correspondstodiferenttypesof fluidlow T 2correspondingtofluidrestrictedbyclayboundmiddleT 2correspondingtofluidrestricted bycapilaryinmicroporeandhight 2correspondingtofreemovablefluidinmacropore.ThentheT 2 mapcouldreflectdistributionofmovablefluidofsamples.intheresearchareamostmovablefluidt 2 mapsoftightsandstonearesingle-peaktypeandhigh-left-peaktypecontrastivetot 2 mapsofotherfor- mationswithextra-lowpermeability.thesingle-peaktypesaremoreandhigh-right-peaktypesandequal peaktypesareless.thedistributionrangeofmovablefluidisrelativelywideandtheaverageis41.3% whichbelongstomediuminordosbasinwhilemovablefluidsaturationabove50% stilhas37.9%and theareaofhighmovablefluidsaturationisthemaindirectiontofindfavoritearea. Keywords:OrdosBasin;tightsandstone;movablefluid;NMR

GeologicalScienceandTechnologyInformation Vol.37 No.5 Sep doi: /j.cnki.dzkq ,,. [J].,2018,37(5):49-53.,,, ( ), 30045

37 5 2018 9 GeologicalScienceandTechnologyInformation Vol.37 No.5 Sep. 2018 doi:10.19509/j.cnki.dzkq.2018.0506. [J].,2018,37(5):49-53. ( ) 300459) : PL 10 30% : ; ; ; :P618.13 :A :1000-7849(2018)05-0049-05