Abstracts
Journal of Northeast Petroleum University
V o l .3 8
No. 5
Oct. 2014
Abstracts
Diagenesis analysis of reservoirs in Es2 and Es3 in Wuqiang area of Raoyang sag/ 2 0 1 4 . 3 8 ( 5 ):1— 6 J I A N G Chao',DENG Aiju2, LI Fengqun2, Z H A N G Xinjian3, LI Yun'e2
( 1 . G e o s c i e n c e s R e s e a r c h I n s t i t u t e,Shengli Oilfield Company. SINOPEC,Dongying Shcindcmg
257015,China; 2. Oii Recovery Plant No. 3,Huabei Oilfield,PetroChina, Hejian t Hebei 062450,China; 3. Wester?i Nezu Prospect Research Institute . Shengli Oilfield Company . SINOPEC, Dongying. Shandong 257000, China )Abstract:I n o r d e r t o k n o w t h e contributing factor a n d distribution o f effective reservoirs, t h e t y p e of d i agenesis and diagenetic evolution were studied via core analysis, thin section analysis, and core conven tional analysis. The result showed: t h e m a i n r o c k t y p e a r e a r c o s e a n d lithic a r k o s e, a n d t h e textural mciturity a n d c o m p o s i t i o n a l m a t u r i t y a r e m o d e r a t e . Dissolution p o r e s a r e t h e m a i n p o r e s, a s w e l l a s a f e w p r i m a r y p o r e s a n d fractures. T h e b u r i e d d e p t h o f t h e reservoirs in E.v2 a n d E.v3 is v e r y h i g h . m a k i n g t h e porosity a n d permeability l o w t o m o d e r a t e . T h e diagenetic s t a g e o f t h e reservoirs b e l o n g s t o s t a g e B o f t h e early d i a g e n e s i s, a n d s t a g e A o f t h e m i d d l e diagenesis. Diagenetic analysis indicates t h a t s e c o n d a r y p o r e s m a i n l y exist vertically i n a d e p t h r a n g e o f 2 4 0 0 ' 2 8 0 0 m d u e t o t h e p r o c e s s o f t h e m a t u r a t i o n o f s o u r c e r o c k s . T h i s s t u d y will b e helpful t o g u i d e t h e oil a n
d g a s exploration a n d d e v e l o p m e n t . K e y w o r d s:R a o y a n g sag W u q i a n g o i l f i e l d; t h e s e c o n d m e m b e r o f S h a h e j i e f o r m a t i o n? t h e third m e m b e r o f S h a h e j i e f o r m a t i o n;diagensis
Densification mechanism analysis of sandstone densification within Xujiahe formation in low-steep structure in southern Sichuan basin/2014,38(5): 7— 14 G U N a 1, 2, T I A N J i n g c h u n 1 2,Z H A N G X i a n g 1 . 2, L I A N G Y u c h e n 2, S U B i n g r u i 2
( 1 . S t a t e K e y L a b o r a t o r y o f Oil and Gas Reservoi?' Geology and Exploitcition,Chengdu Utiiversity oJ Technology, Chengdu. Sichuan 610059* Ch i?ia 2. School of Sedimentary Geology, Chengdu University of Technology, Chengdu, Sichuan 610059, China ) Abstract F o r t h e e f f e c t i v e s e a r c h i n g a n d p r e d i c t i n g d e v e l o p m e n t a r e a s o f" s w e e t s p o t" r e s e r v o i r i n t h e tight sandstone. using the cast thin section identification, scanning electron microscopy observation. combining the test data of physical properties with fluid inclusion homogenization temperature for comp r e h e n s i v e a n a l y s i s, T 3 JC a、丁: i jr‘ i s a t y p i c a l d e n s i t y l o w p e r m e a b i l i t y g a s r e s e r v o i r w i t h i n X u j i a h e f o r m a tion in low-steep structure of Shunan area. Diagenetic evolution of the reservoir sand body can be divided into three evolution paths: diagenetic s e q u e n c e s m a i n l y w i t h t h e c o m p a c t i o n a n d s e c o n d a r y q u a r t z o v e r g r o w t h . d i a g e n e t i c s e q u e n c e s m a i n l y w i t h c h l o r i t e r i m a n d p r e d o m i n a n t l y e a r l y c a l c i t e c e m e n t a t i o n;f u r t h e r m o r e analysis o f t h e densification m e c h a n i s m o f s a n d b o d y . T h e results s h o w that s e d i m e n t a t i o n is t h e congenital factor t o physical p r o p e r t y o f s a n d reservoir. C o m p a c t i o n is t h e k e y factor f o r reservoir densification. S e c o n d a r y q u a r t z o v e r g r o w t h c o u l d d e s t r o y t h e quality o f reservoir. L o w e r dissolution d e gree is another key factor for reservoir densification and the time of reservoir densification is before the hydrocarbons filling. The homogenization temperature of saline fluid inclusions distributed between 8 2 . 5 1 2 5 . 1° C, c o n c e n t r a t e d distribution b e t w e e n 1 0 0 .0°C 1 2 0 .0°C t h u s t h e prediction o f densifi cation depth is between 1 725 2 864 m secondary quartz overgrowth. thus the densification process oc-
AbstractsJournalofNortheastPetroleum Universitol.38 No.5 Oct.2014 Vy,curreddurinYanshantectonicactivit.Whentheburieddethcontinuedtoincreasethehdrocarbons gypy
,beancharintherebthecontinuinofwaterrockreactionweresuressed.Theresultsofthisstud - -ggygppg "s"ithereliabledataforreservoirofweetsotnXuiaheformation.inrovideeoloicalredictin pjygpggpg :;ath;XKewordsdensificationmechanism;densificationtimediaeneticevolutionaruiaheforma -pgyjy
;tionsouthernSichuanbasin
Reservoircharacteristicsandmaincontrollinfactorsofhihreservoirinthelower2thmemberofualit ggqy
/():XuiaheformationinYuanbaarea2014,38515-22 j,,ShuanLIHontaoXIAO KaihuaJIA gg
(Petroleum Exlorationand Production ResearchInstitute,SINOPEC,Beiin00083,China) pjg1
:AbstractThelower2ndmembersandbedsIandIIofXuiaheformationinYuanbaareahaveoodas jggbearinotentialaccordintorecentexlorationachievements.Thereservoircharacteristicsarerevealed gpgp
,inthisaerthrouhaseriousofareateanalsisincludincoresobservationrockandmineralcom- ggggygpp ,m,,ositionanalsisercurinectionexerimentsthinsectionscastthinsections.Amonthefourli -pyyjpg
,tholosthathavebeenrevealedLithicsandstoneandfeldsathiclithicsandstonearedeositedindelta gypp,frontsubwaterdistributarchannelenvironmentwhileuartzsandstoneandlithicuartzsandstoneare yqq
,inshoreshallowlacustrineenvironment.Thereservoirshavelowlowdeositedorositermeabilit - ppypy,oreandvercomlicatedandthroatstructuresandthemercurinectionexerimentsillustratethat yppyjp sandstonehasthebetterandthroatstructuresthantheotherlitholo.Thereservoirtheuartzore gyqp
,oresaredominatedbsecondarsolutioncracksaredominatedbhorizontalandlowanlefracores -pyyygp tures.Reservoircharacteristicsarecontrolledbsedimentaranddiaenesis.Differentmicrofaciescon -yyg
,trolthecomonentandtexturematuritandconseuentlaffectthedevelomentofandsecrimar -pyqyppy ores.Therimarorosit.Cementationondarcomactionisthemainreasonforthedestructionof ppypyyp
,weremainlformedinthemiddlelatediaenesisstaeandthusdestructedthebutrimarorosit yggpypy ,clacementationhavetheeffectsofkeeinthesacedissolutionisthemainfactorsofformsomeore -ypgpp
,,oresorositualitinsecondarimrovintheandthedevelomentofhihreservoirs.There -ppyqygypgpg searchrovidessuortstotheevaluationandexloitoftheasreservoir. ppppg
:;;;KewordsYuanbaareaXuiaheformationreservoircharacteristicscontrolfactous jy
/:ShaleasaccumulationconditionsandfavorableareasofthelowerCambrianinXiuwubasin2014,38(5) g23-30
111212
,,FeiBAOShuinRENShoumaiLIShanruTONGChuanchuanZENGLiPANG , , jg,g
(1.Oiland GasSurveCenter,China GeoloicalSurveBureau,Beiin00029,China;2.Research y gy jg1InstituteoShaleGasDevelomentand SurveinJianxi,NanchanJianxi330002,China) f pygg,g
:,,m,AbstractThisstudiedthedistributionfeaturesofshaletesofkeroen,abundanceaturitaer ypgyppreservoircharacteristicsandaccumulationofshaleofthelowerCambrianoranicrichmarinemudas -g - g
,,shaleintheXiuwubasinthrouhfieldeoloicalsurvecoreobservationtestanalsisandfieldas gggyygcontenttestin.ThelowerCambrianblackshaleintheXiuwubasinwascharacterizedbreatthick -gyg
,,,nesswidedistributionhihoraniccarboncontentandhihmaturit.Inadditiontheshalehashih gggyg,wlentorositbrittlemineralcontent(over40%)andofmicroandmicrofractureshichshowsa -p - pyy oodrosectsforofshaleasexloration.TheamountofshaleasresourcesinthelowerCambrian -g gppgp
8 3calculatedtobe2922.98×10m bisothermaladsortionsimulatinexerimentandcontentwasas ypgpg
),measurementwiththevolumetricmethod.Thethickness(over100metershihoraniccontentreat ggg
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