[18] 2 2 H/C 10% R o 3% [19] [11] [20] ; (1) D G NE-SW ; G /D [21] - [22] (2) YY1 :F1. ;F2. ;F3. ;F4. ;F5. ; :1. ;2. ;3. ;4. ;5. ;6. (1-a):Ⅰ.

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1 GeologicalScienceandTechnologyInformation Vol.37 No.2 Mar doi: /j.cnki.dzkq : [J] (2): : ( ; ) : - 2 TOC - YY1 X : ; - YY1 - ; : ; ; ; ; :P :A : (2018) [1-4] [8-9] ; [10-11] ( ) [5-7] [12-13] TOC ; [14-17] ; - : : : (2016ZX ); (HNKJ16-30) : (1991 ) zhaowen- tao@hnceri.com

184 2018 [18] 2 2 H/C 10% R o 3% [19] [11] [20] ; (1) D G NE-SW ; G /D [21] - [22] (2) YY1 :F1. ;F2. ;F3. ;F4. ;F5. ; :1. ;2. ;3. ;4. ;5. ;6.

2 [18] 2 2 H/C 10% R o 3% [19] [11] [20] ; (1) D G NE-SW ; G /D [21] - [22] (2) YY1 :F1. ;F2. ;F3. ;F4. ;F5. ; :1. ;2. ;3. ;4. ;5. ;6. (1-a):Ⅰ. ;Ⅱ. - ;Ⅲ. ;Ⅳ. - ;Ⅴ. ;Ⅵ. ;Ⅶ. - ;Ⅷ. - ;Ⅸ. ;Ⅹ. ;Ⅺ. 1 (a) (b) Fig.1 Regionaltectonicframework (a)tectonicsummary(b)ofthesoutheasternchongqingarea

3 第２期赵文韬等海相页岩有机质石墨化特征研究以渝东南地区牛蹄塘组为例１８５图２渝东南地区综合柱状图２３Ｆｉｇ２ＳｙｎｔｈｅｔｉｃａｌｓｔｒａｔｉｇｒａｐｈｉｃｃｏｌｕｍｎｏｆｔｈｅｓｏｕｔｈｅａｓｔｅｒｎＣｈｏｎｇｑｉｎｇａｒｅａ育一套黑色页岩硅质页岩粉砂质泥岩和泥质粉砂叠纪早期烃源岩再次深埋开始二次生烃并进入岩２４２７该区牛蹄塘组黑色页岩热演化程度高生主排烃期三叠纪中期页岩储层进入排烃后期由烃能力及保存条件差且其含气性不及上部的龙马于三叠系的快速沉降至早中侏罗世烃源岩已进溪组现场解吸含气量平均小于１ｍ３ｔ入排烃晚期晚白垩世有机质热成熟度Ｒｏ已达２８３０后期地层抬升导致烃源岩热演化停根据前期地质资料渝东南地区牛蹄塘组烃源岩在晚奥陶世进入生烃门限后期华里西运动的抬升作用导致牛蹄塘组地层埋深变浅生烃停滞至二滞总体而言早期长时间的浅层埋藏对页岩有机质的保存较为有利避免了油气散失快速沉降也有

4 YY1 [ ] X ( ) YY ~ m [31] () YY1 2.0%w(TOC)7.9% 0.1~ Ω m 0.69 m 3 /t [28] 85.8Ω m ( (ECS) (CMR) ~3850.0m) 0.1~2.4 (FMI) : Ω m 0.32Ω m YY1 C (3) 3 Fig.3 3 YY1 MainlogcurvesoftheNiutitangFormationin WelYY1

5 2 : : X YY1 4 X YY1 (XRD) (3800.0~ m) YY1 Table1 Litho-electricitydatainthelow-resistivitylogsof theniutitangformationin WelYY1 / ; m /m /(Ω m) /(Ω m) YY ~ X YY ~ YY ~ YY ~ X PANalytical X Pert PRO X h ( YY1 60 ) X (2) (m dry ) (d) (L) 40.0% ( φ ) (k) 45.5% ; (R) : ρ =πr 4.0%~12.8% 5.3% ~17.0% d 2 /4L ρ 9.5%11.9%; % YY1 4 (1) : 0.0%~45.1% 61.3Ω m Ω m X (4) ; ( Ω m) ( 7%) ( Fig.4 4 YY1 Relationshipbetweentheresistivityofdrysamplesand thatinthelogcurves 3) [32]

6 YY1 X Table2 DateofXraydifractionquantitativeanalysesoftheNiutitangFormationin WelYY1 /% /m YY ~ / 17.0 / YY ~ YY ~ / YY ~ [33-34] ; 3 Table3 Resistivityofmineralsintheshales /(Ω m) SiO K[AlSi3O8] ; Na[AlSi3O8] K[AlSi3O8] ; Ca[Al2Si2O8] CaCO CaMg(CO3) FeCO3 (1~10) * FeS CaSO4 (1~100) 10 4 Al2Si4O5(OH) ( KMgCaNa) 0.33 (Al Mg) (Si4O10)(OH) 2 nh2o Mg3 (Al4O10)(OH) Mg3(OH) 6 * (H30K)Al8(SiAl) 16O40(OH) 8 * C (8~13) 10-6 : - ;* 4 - YY1 R o :YY1 R o ( R o 3.0%) R o (5) R o 5 R o 3.0% ;R o 3.1% 1.0Ω m 1.0Ω m YY1R o (R o 3.1%) : 2%~20% [35-37] 4.1 C/H [1938] (8~13) 10-6 Ω m 5 YY1 R o Fig.5 RelationshipbetweenthelogresistivityandR ; oof theniutitangformationin WelYY1

2 : : 189 ; [40] (4) - 4000 m YY1 w(toc) :w(toc) 0.2%~12.0% ; - w(toc) w(toc)<2.0% w(toc) 10 3 Ω m 10 0 Ω m ; w(toc) 2.0% 0.1~1.0 Ω m (6) w(toc) ( ρ 1.0 Ω m) w(toc) [w(toc) 2.0%] 4.

7 2 : : 189 ; [40] (4) m YY1 w(toc) :w(toc) 0.2%~12.0% ; - w(toc) w(toc)<2.0% w(toc) 10 3 Ω m 10 0 Ω m ; w(toc) 2.0% 0.1~1.0 Ω m (6) w(toc) ( ρ 1.0 Ω m) w(toc) [w(toc) 2.0%] m - 6 YY1 TOC (7) Fig.6 Relationship betweenthelogresistivityand TOCoftheNiutitangFormationin WelYY1 Fig.7 7 Hydrocarbon-generationevolutionhistoryinthesouthernChongqingarea 2 : - 3 ; w (TOC)( 7.9%) - ( 4.0%) [7] (4) : -

8 ; C 4 YY1 - Table4 Comparisonofmajorparametersbetweenshalesofthe Wufeng-LongmaxiFormationandofthe NiutitangFormationin WelYY1 /m / w(toc)/ /(Ω m) % % Ro/% / / (m 3 t -1 ) (m 3 t -1 ) 587.0~ ~ [3] [J]. ( ρ 1.0 [4] Ω m) YY1 [5] [J] (2): ; [6] [7] [J]. 5 (1) [J] (4): X YY1 [11] [J] (2) w(toc) R o [J]. w(toc) R o ( ρ 1.0 Ω m) w(toc) [w(toc) 2.0%]R o (R o 3.1%) (S1): [15] [J]. (3) [16] [J] (4):7-13. [17] YY1 (9): [18] - [J]. [19] : [1]. [J]. [D] (6): (6):5-9.. [J] (6): [J] (1): (5): [8]. [M]. : 2009: [9]. : [J] (8):1-7. [10] (13): [12] (2): [13]. [J] (1): [14]CurtisM ECardotBJSondergeldC Hetal.Developmentof organicporosityinthe WoodfordShalewithincreasingthermal maturity[j].internationaljournalofcoalgeology (7): [J] (3): : [J] ( 1): [20]. : [21]. 1 [2]. [J]. [J] (2): (1):11-15.

9 2 : : 191 [22]. : [J] (4): [J] (2): [23]. [32]. [D]. : 2015: [24] [J] (2): [33]TouloukianYSJuddD RRoyRFetal. [25]. [M].. : (): [34]. : [J] (1):1-19. [26] (): [J].[35] (2):1-16. [27]. [36]. [J]. [J] (8): (3): [28]. [37]. [J] (3): [29]ZhaoHGivensN BCurtisB.ThermalmaturityoftheBarnet Shaledeterminedfrom wel-loganalysis[j].aapg Buletin (41): [30]KinleyTJCookL WBreyerJAetal.Hydrocarbonpotential ofthe BarnetShale(Mississippian)Delaware Basinwest Texasandsoutheastern NEW Mexico[J].AAPG Buletin (8): [31]. [J] (1): [J] (5):689- [J] (18): [J] (1): [38]. [M]. : 1995: [39]. [J] (3): [40]. [J] (3): GraphitizationCharacteristicsofOrganicMatersin Marine-FaciesShales Zhao Wentao 1 JingTieya 1 XiongXin 2 WuBing 2 ZhouYou 2 (1.HuanengCleanEnergyResearchInstituteBeijing102209China; 2.Chongqing MineralResourcesDevelopmentCompanyLimitedChongqing401123China) Abstract:Twosetsofsourcerocksincludingthe WufengFormationintheUpperOrdovician-theLong- maxiformationinthelowersilurianandtheniutitangformationinthelowercambrianarewidelyde- velopedintheupperyangtzeplatformwhichprovidematerialsourcesfortheshale-gasexplorationinre- centyears.inthesichuanbasinanditsaroundareasalthoughtheniutitangformationhassomeadvanta- gesofshale-gasdevelopmentsuchasthickorganic-richshaleshightocandfavorablerockbritleness thegascontentofthisformationisapparentlylessthanthatinthe WufengFormation-LongmaxiForma- tion.thispaperbasedonthesuper-lowresistivitylogofwelyy1inthesouthernchongqingareadis- cussesthelitho-electricityexperimentsandx-raydifractionquantitativeanalysesofthiswel.thestudy resultsshowthatthesuper-lowresistivityinthelogsandlitho-electricitytestsiscausedbythehigh-con- ductivitymineral-graphite.graphiteisoneofthesignaturemineralsinthehigh-temperaturegas-generation stagewhichindicatestheorganiccarbonizationreachesahighdegreeinthisregion.bycomparingthe NiutitangFormationandthe WufengFormation-LongmaxiFormationwithinelectricaldatageo-chemical resultsandlogcurvesthepaperconcludesthattheorganic-richshalesoftheniutitangformationin Wel YY1havebeengraphitizedwhosegas-generationandpore-developmentabilityisworsethanthatofthe WufengFormation-LongmaxiFormationdemonstratingthattheNiutitangFormationisarelativelyunfa- vorablelayerintheshale-gasdevelopment.inadditiontheresistivitylogcouldbeusedasanimportant indicatorintheearlyshale-gasexploration;super-lowresistivitydenotesthattheorganicmatersareof highevolutiondegreeslowgascontentsandlowhydrocarbon-generationabilitywhichisharmfultothe furthershale-gasexplorationcareer. Keywords:SichuanBasin;southernChongqingarea;NiutitangFormation;marine-faciesshale;super-low resistivity;graphitization

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