36 1 2017 1 GeologicalScienceandTechnologyInformation Vol.36 No.1 Jan. 2017 doi:10.19509/j.cnki.dzkq.2017.0122. : 7 [J]. 201736(1):183-187. : 7 1a 1b2 3 2 2 (1. a. ;b. 710069;2. 716000; 3. 710021) : 7 T 2 T 2 T 2 T 2 T 2 7 T 2 T 2 41.3% 50% 37.9% : ; ; ; :TE122.221 :A :1000-7849(2017)01-0183-05 [1] 1 7 ( [2-7] 1) 30.66% [8] 34.71%19.32% 7 7-15.31% [9] 7 (1.57%) (4.21%) (1.87%) (4.66%) (1.18%) 7 9.32% 0.16 10-3 μm -2 2.11%( 1) [10-11] 7 :2015-12-27 : : (2008zx05013-005) : (1988 gw1988@163.com ) E-mail: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.1 Classificationplotforchang7tightsand- stoneinjiyuanarea 2 7 Table2 Materialcomponentforsandstonesofchang7tightsandstoneinJiyuanarea φb / % 7 30.66 34.71 19.32 1.57 4.21 1.87 4.66 1.18 1.05 0.77 227 2 2.1 2.2.1 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] 2.2 2 7 T 2 (Y263 2306m) 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 T 2 mapofchang7tightsandstoneinjiyuanarea Fig.4 4 T 2 (Y263 2306m 7 2 ) NMR T 2distributionandmicroscopicporestructurecharacteristicofhigh-right-peaktype
186 2017 5 T 2 (C270 2649m 7 1 ) Fig.5 NMR T 2distributionandmicroscopicporestructurecharacteristicofhigh-left-peaktype ;4 7 16.8% ~ 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 2 8 7 T 2 Fig.8 Movablefluiddistributionrangehistogramsofchang7 T 2 tightsandstoneinjiyuanarea T 2
1 : 7187 (3) 7 T [9] 2 T 2 7~15ms 16.8% ~65.5% 41.3% 200328(4):419-424. : [1]. [13]. T2 [J]. 201231(4):313-222. [2]. : [14]. T2 [M]. : 2011:1-150. [3]. [M]. : 2011:1-310. [4]. 7 [16]. [J]. [J]. :G 200333(4):323-332. 201534(3):120-125. [5]. [J]. 200122(6):40-44. [J]. 201231(4):81-85. [6]. [J]. : 201243(12): [J]. 201433(6):69-77. 4796-4800. [7]. [19]. [J]. 201534(4):124-131.. 6-7 [D]. : 2010. [10]. [J]. 200147(3):301-308. [11]. : [J]. [12]. [J]. 200829(4):558-566. [J]. 200729(4):80-86. [J]. 200226(1):18-21. [15]. [J]. 200318(4):732-742. [17]. [18]. [J]. 200680(3):432-438. [9]. [20]. 6 [J]. : [J]. 201084(8): 201433(3):126-132. 1223-1230. 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