%~7% [1] % ( 4) km 2 ( ( 1) ) [4] [425] 1600~3000 [26] m [ =( - - )/ 6 40] [28] (T 3x 1 ) (T 3x 3 ) (T 3x 5 ) ; (T 3x 2

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1 GeologicalScienceandTechnologyInformation Vol.36 No.2 Mar doi: /j.cnki.dzkq q [J] (2): Q a b a b a b a b ( a. ;b ) : Q : ; ; ;Q :P :A : (2017) [1-2] [3-11] [20] ; [12-15] [1] [16-18] [19] [23-24] ; [19-22] [19] : : : (2011ZX HZ;2016ZX ) : (1991 ) yuyucdut@163.com : (1979 ) linliangbiao08@cdut.cn

2 %~7% [1] % ( 4) km 2 ( ( 1) ) [4] [425] 1600~3000 [26] m [ =( - - )/ 6 40] [28] (T 3x 1 ) (T 3x 3 ) (T 3x 5 ) ; (T 3x 2 ) - (T 3x 4 ) (T 3x 6 ) ( 2) - ( 5-a) ; [1] 1 ( ) Fig.1 StructuraloutlinemapofSichuanBasinandlocationof thestudyarea 3 3 ( 5-a) ( 5-bc) B - A ( 4) ( 5-d) ; ( 5-e) ( 2) - [27] 641 ( 3) ; ( 5-f) ( 5- g)

3 2 :Q Fig.2 ComprehensivecolumnofsedimentaryfaciesofXujiaheFormationofWelDongfeng-2insouthernSichuan 3 (641 ) Fig.3 PlotofQFRfor641sandstonesamplesfromanalysisresultsofXujiaheFormationinsouthernSichuan

136 2017 4 ( ) 4.1 Housknecht [29] 4 =( - - Fig.4 ContentofinterstitialmaterialsinXu2reservoir )/ 100% (%)= 20.91%+22.

4 ( ) 4.1 Housknecht [29] 4 =( - - Fig.4 ContentofinterstitialmaterialsinXu2reservoir )/ 100% (%)= 20.91% S o% S o= 槡 D3 D 1 D1=2- [30] - Φ75D3=2-Φ25S o ( ~0.5mm ) 38.5% ( 5-h) a. 1 ;b. 2 ;c. 2 ;d. 1 ;e. 6 ;f. ;g. 207 ;h. 2 Fig.5 5 MicroscopicphotosofXu2reservoirinsouthernSichuan

5 2 :Q 137 ( ) = /( + ) [20] 3 3 = [20] Q 4.2 Q Q ( 6) [23] ( ) ( 6-AB) Q R 2 =0.640 R 2 = Table1 Diagenesiscoeficientaveragevalueofwelsand R 2 =0.233 outcropsxu2reservoirinsouthernsichuan ( ) ( 6-C) ~ Fig Q 7 =10 23 ( ) A B C =5 A B 2 5 A ~ ~ ~ Relationshipbetweendiagenesiscoeficientandsurface A2 A1 porosityinxu2reservoirinsouthernsichuan A1

6 Fig.7 Q 1 ( )] [ 1~23 Q-typeclusterplotsofthediageneticfaciesinXu2res- ervoirinsouthernsichuan ( ) 6 ( ) 2 ( ) 6 ( ) A2 B ~ ~ ~1.0 A B B1 B2 Fig.9 Relationship between porosity-permeability of Wel B1 B2 Tong-2WelWeidong-2WelYue-114WelTong-6 C ~ ~ ~0.63 C 5 ( 8) Fig.10 Typicalsampledistributionofporethroatradi- uscurvesof Wel Nv-107WelDongfeng-6 WelWeidong-2WelTong ( 11) Fig.8 Surfaceporositydistributionofthediageneticfa- ciesinxu2reservoirinsouthernsichuan

7 2 :Q Fig.11 ( [31] ) DiageneticfaciesdistributionoftheXu2reser- voirinsouthernsichuan ; ( >70%) ; ; : (1) 5 ( ) ( ) (2) 3 12 ( ) Q 5 : (3) 12 Fig.12 Contentofepimatrixplasticdebriscementofdiagenet- icfaciesinxu2 5 : [1]. : [M]. : [2]. [J] (6):

8 [3]. [18]. [J] (5): [4]. [19]. [J] (6): [5]. [20]. [J] (1): [6]. - [21]. [J] (2): [7] (1): [8]. [23]. : [J] (2): [9] [J] (4): [10]. : [J]. [J] (1): [11]. [25]. [J] (4): [12]. [26]. [J] (4): [13]. [27] [M]. : [J] (10): [14]. [J]. : (4): [J]. : (2): [15]. [J]. : 2 (J3jf) [J] (2): [16]. [30]. [D]. : 2009:1-73. [17]. - [31]. [D]. : [D]. : 2013:1-87. [J] (2): [J] (5): [J] (4): [J]. [22]. [J] (2): [24] (5): [J] (4):1-3. [J] (9): [28]. [29] (5): [J] (2): :1-74. ApplicationofQTypeClusterAnalysisintheStudyofQuantitative DiageneticFaciesofMember2ofXujiaheFormationinSouthernSichuan YuYu ab LinLiangbiao ab GaoJian ab Hong Wei ab (a.statekeylaboratoryofoilandgasreservoirgeologyandexploitation; b.instituteofsedimentarygeologychengduuniversityoftechnologychengdu610059china) [J] (4):535- M [J] (1):191- Abstract:Member2oftheUpperTriassicXujiaheFormationinsouthernSichuanBasinisoneofthekey layersforgasexploration.byidentifyingthethinsectionsanalyzingthedrilcorephysicalpropertieswe findthatmaintypesofreservoirsandstonesarefeldsparlithicsandstonelithicfeldsparsandstoneandlith- icsandstoneandreservoirsandstoneshasexperiencedcompactioncementationdissolutiondisruption andmetasomatism.bycalculatingthereservoirrockcompactioncoeficientcementationcoeficientand coeficientofdissolutionweusetheqtypeclusteranalysistoclassifyreservoirrockaccordingtothesimi- larvariablefactorsdiageneticfaciesofthe2nd MemberofXujiaheFormation.Thefaciesaredividedinto strongcompaction-strongcementationfaciesstrongcompaction-mediumcementationfaciesstrongcom- paction-weakcementationfaciesmediumcompaction-weakcementationfaciesweakcompaction-weakce- mentationfaciesinfivekindsofdiageneticfaciesquantitatively.thestudyresultshowsthatthediagenetic faciesdistributionisobviouslycontroledbyinterstitialmaterialtheplasticdebrisandthedistributionof sedimentaryfacieswhichmainlydevelopedintheunderwaterdistributarychannelofthedeltafront. Keywords:southernSichuan;XujiaheFormation;diageneticfacies;Qtypeclusteranalysis

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