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

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1 GeologicalScienceandTechnologyInformation Vol.36 No.4 Jul doi: /j.cnki.dzkq [J] (4): ( ) ) : 93 A 3000m : ; ; ; :TE122.2 :A : (2017) [1] 6 [2-3] [1] km %~68.97% 57.07%; 20.30%~43.70% 29.45% ( 1) ; 6.67%~27.00% : : : (2016ZX ) : ( ) weigang@cnooc.com.cn : (1984 ) yanghf3@cnooc.com.cn

4 : 161 1 Fig.1 PositionofShanansaginBohaiBayBasin 12.75% 0.80~2.17 1.46 4.57% 2.26% 2.24% ( 2) X 10% ; - - - ;F. ;R. ;Q. 2 Fig.2 Triangulardiagramfortheclassificationofsandstonesof 2.

2 4 : Fig.1 PositionofShanansaginBohaiBayBasin 12.75% 0.80~ % 2.26% 2.24% ( 2) X 10% ; ;F. ;R. ;Q. 2 Fig.2 Triangulardiagramfortheclassificationofsandstonesof 2.2 thesecond memberofshahejie FormationPaleogene sandstonereservoirsinshanansag 5000 m [3] (1) (Ⅲ ) 2300~3000m 3000~5000 m - ( 3-a mno) C15-C ; 20.9% μm 2 ( m) ( 3-b) ( 3-c) [4-9] -

地质科技情报１６２２０１７年ａＣ１３Ｃ２７００ｍ岩屑长石砂岩长石颗粒点线接触ｂ２４３４ｍ长石岩屑砂岩泥晶碳酸盐胶结ｃ２４８９８０ｍ岩屑质长石砂岩铁方解石胶结ｄ２８０５３ｍ岩屑长石砂岩钙质基底式胶结局部见铁方解石胶结ｅ２３３４ｍ岩屑长石砂岩绿泥石包壳完全包裹碎屑颗粒ｆ２４６９

3 地质科技情报１６２２０１７年ａＣ１３Ｃ２７００ｍ岩屑长石砂岩长石颗粒点线接触ｂ２４３４ｍ长石岩屑砂岩泥晶碳酸盐胶结ｃ２４８９８０ｍ岩屑质长石砂岩铁方解石胶结ｄ２８０５３ｍ岩屑长石砂岩钙质基底式胶结局部见铁方解石胶结ｅ２３３４ｍ岩屑长石砂岩绿泥石包壳完全包裹碎屑颗粒ｆ２４６９０９ｍ岩屑长石砂岩石英颗粒主要呈凹凸状或镶嵌状接触２３３２５ｍ长石岩屑砂岩可ｇ见长石高岭土化ｈ２３３４ｍ岩屑长石砂岩长石高岭土化剧烈ｉＣ１３Ｃ２７００ｍ铁质方解石基底式胶结溶蚀孔洞发育ｊ２４６９０９ｍ粒间孔发育见有少量溶蚀孔和铸模孔孔隙度为１２３ｋＣ１４Ｂ２４３５ｍ岩屑长石砂岩可见长石高岭土化和粒内残余溶蚀孔隙ｌ２４６９０９ｍ岩屑长石砂岩粒间孔发育见有少量溶蚀孔和铸模孔孔隙度为１２３ｍＣ１４ＡＳ３１５９ｍ长石岩屑砂岩颗粒点线接触磨圆较差呈次圆次棱角状胶结物泥晶碳酸盐发育均匀分布粒间孔隙类型主要见次生粒间孔颗粒铸模孔和颗粒内溶孔ｎＣ１４ＡＳ３２３６ｍ岩屑长石砂岩颗粒点线接触磨圆较差颗粒呈次棱角次圆状胶结物方解石发育均匀分布充填粒间孔隙类型主要见次生粒间孔和颗粒内孔ｏＣ１５Ｃ３２６０ｍ岩屑长石砂岩颗粒点线接触磨圆较差颗粒呈次棱角次圆状胶结物方解石发育均匀分布充填粒间孔隙类型主要见次生粒间孔和颗粒内孔图３沙二段砂岩储层储集空间类型及成岩作用特征Ｆｉｇ３Ｒｅｓｅｒｖｉｏｒｓｐａｃｅｔｙｐｅｓａｎｄｄｉａｇｅｎｅｔｉｃｃｈａｒａｃｔｅｒｉｓｔｉｃｓｏｆｔｈｅｓｅｃｏｎｄｍｅｍｂｅｒｏｆｓｈａｈｅｊｉｅｆｏｒｍａｔｉｏｎｓａｎｄｓｔｏｎｅｒｅｓｅｒｖｏｉｒｓ碳酸盐胶结物中整体上从内至外呈现方解石含铁砂岩样品的Ｘ衍射分析结果显示研究区沙二方解石含铁白云石环带的特点反映了早期生成段储层样品中黏土矿物以伊利石为主占５３Ｓ混层占１０３８偶见少量绿８５其次是Ｉ的方解石在晚期成岩阶段白云石化及铁质交代的特征图３ｄ２黏土矿物胶结作用泥石和高岭石胶结物图３ｅ其中伊利石以自生为主在岩石薄片中多呈针状或鳞片状镜下晶形为

4 4 : 163 (3) ( ) I/S Ⅱ B ( 3-f) ( ) - - ; ( 4) 2.4 (1) ( 3-gh) 3 ( 3-l) ; ( 3-i~l) 2.3 (1) (SY/T ) [10] (2) / (I/ 2000 S) 17%~38% m 4500 m 0.72% ~0.83% 2000 m ; 2000~2400m 60% ; 2400~3500m ( + ) A (2) : 3 [811-14] (1) A ; 3000m - ( 3-m~o) B A (2) 2000~2200 m 80

5 Fig.4 DiageneticparageneticsequenceofthesecondmemberofShahejieFormationinthestudyarea [5] ( 6) ; B (3) ( 5) 5 6 Fig.6 Crossplotofclayvs.porosityofthesecondmemberofShahejie Fig.5 Crossplotofcarbonatecontentvs.porosityofthesec- FormationinShananSag ondmemberofshahejieformationinshanansag

6 4 : 165 [3] [J]. 1979(26): ( 3-i~l) 4 (1) [M].Holand:Elsevier2004. (2) A precipitation[j].marinegeology198880(3): [10] [S] m rine & Petroleum Geology19896(3): (3) 3 (4): : (4):7-14. [4] SchmidtVMcdonaldD A.Theroleofsecondaryporosityin thecourseofsandstonediagenesis[j].specialpublications [5] Surdam RCCrosseyLJHagenESetal.Organic-inorganic interactionsand sandstone diagenesis[j].aapg Buletin (1):1-23. [6]. [J]. : (1):4-7. [7]. [J] (5): [8] MackenzieF T.Sedimentsdiagenesisandsedimentaryrocks [9] FroelichPNArthurM ABurnetW Cetal.Earlydiagenesisof organicmaterinperucontinentalmarginsediments:phosphorite.sy/t : [12]R G MdeBoerRB.Originandsignificanceofredistributional secondaryporosity[j].marine & Petroleum Geology19907 [13]. [J] (1): [1]. [14]SulivanK BMcbrideEF.Diagenesisofsandstonesatshale [J] (2): contactsanddiageneticheterogeneityfrio FormationTexas [2]. [J].AAPGBuletin199175(1): [J] (4): ReservoirCharacteristicsandControlingFactorsontheSecond MemberofShahejieFormationinShananSagBohaiSeaArea WeiGangYang HaifengFengChongDeng Hui (TianjinBranchofCNOOCLtd.Tianjin300459China) [11]Giles M RBoerR B D.Secondaryporosity:Creationofen- hancedporositiesinthesubsurfacefromthedissolutionofcar- bonatecementsasaresultofcoolingformationwaters[j].ma- Abstract:Theanalysisofthetestingdataofthinsectionscatingthinsectionscathodoluminescenceand electronprobeof93coresamplesinthesecondmemberofshahejieformationinshanansagrevealstheli- thologyofthereservoirinbohaiseaareaconsistsofdebris-feldsparandfeldsparsandstonewithlowcom- positionalandtexturalmaturities.itsdiagenesisstageisata periodofmiddlediagenesis.secondaryand mixedporesarethemaintypesofporosityinthisstrata.cementationanddissolutionarethekeyfactors thatdominatethephysicalpropertyofthereservoir.cementationofcarbonateisthematerialcauseforde- structingtheporosityofthereservoirwhiledissolutionisthemostpositivefactorinactiveefectonthe physicalpropertybyformingsecondarydissolutionporesandmixedinterparticledissolutionpores.anoth- erexceptionalcharacteristicinthisareaisthatcompactionhaslitleimpactonthereservoirphysicalprop- ertydespitethatmostofthesecondmemberis3kilometersunderground. Keywords:thesecondmemberofShahejieFormation;diagenesis;controlingfactor;ShananSag

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

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 37 5 2018 9 GeologicalScienceandTechnologyInformation Vol.37 No.5 Sep. 2018 doi:10.19509/j.cnki.dzkq.2018.0507. : 4+5 [J]. 201837(5):54-62. : 4+5 1a1b 1a1b 2 3 (1. a. ;b. 710069; 2. 719000;3. 710016) :