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1、第35卷第2期石油褒劈鈀屆Vo1.35,No.22013年3月PETRoLEUMGEoLoGY&EXPERIMENTMar.,2013文章編號(hào):1001-6112(2013)02=0139—07doi:10.11781/sysydz20130205貴州南部中泥盆統(tǒng)油氣地質(zhì)條件及成藏史分析王津義,王彥青,彭金寧,劉光祥,高林(1.中國石油化工股份有限公司石油勘探開發(fā)研究院無錫石油地質(zhì)研究所,江蘇無錫214126:2.中國石油化工股份有限公司勘探南方分公司,成都610041)摘要:貴州南部槽盆相沉積的中泥盆統(tǒng)獨(dú)山組泥質(zhì)烴源巖分布廣泛,有機(jī)質(zhì)豐度高,有機(jī)碳含量平均3.02%,干酪根顯微組分顯示以Ⅱ型
2、為主,少量為I型,顯示極好的生烴條件。碳酸鹽巖和砂巖儲(chǔ)層晶間、粒間孔隙及裂縫均十分發(fā)育,儲(chǔ)集性能較好。蓋層廣泛分布,保存完好,具有較強(qiáng)的封蓋性。油氣顯示表明,中泥盆統(tǒng)碳酸鹽巖儲(chǔ)層及砂巖儲(chǔ)層中,均可見到不均勻有機(jī)質(zhì)浸染或?yàn)r青充填。獨(dú)山組中包裹體均一溫度顯示,該區(qū)具有兩期油氣充注。泥盆紀(jì)末期,貴州南部正處于紫云運(yùn)動(dòng)的抬升隆起區(qū),成為早石炭世生油高峰階段油氣充注的有利區(qū)域,油氣沿?cái)嗔严蚺_(tái)地、臺(tái)地邊緣礁灘相灰?guī)r儲(chǔ)層及濱岸相砂巖儲(chǔ)層運(yùn)聚.可形成一定規(guī)模的油氣藏。關(guān)鍵詞:泥質(zhì)烴源巖;油氣組合;油氣顯示;成藏史;獨(dú)山組;中泥盆統(tǒng);貴州南部中圖分類號(hào):TEl22.1文獻(xiàn)標(biāo)識(shí)碼:APetroleumgeolog
3、icconditionsandaccumulationhistoryofMiddleDevonian,southernGuizhouprovinceWangJinyi,WangYanqing,PengJinning,LiuGuangxiang,GaoLin(1.WuxiResearchInstituteofPetroleumGeology,SINOPEC,Wuxi,Jiangsu214126,China;2.S1NOPECExplorationSouthernCompany,Chengdu,Sichuan610041,China)Abstract:IntheDushanFormationoft
4、heMiddleDevonianinthesouthernGuizhouprovince,themudstonesourcerocksoftrough—basinfaciesarewidespreadwithhighorganicabundance.Theaverageorganiccarboncontentis3.02%.MostofthekerogensareoftypeⅡl,andsomeareoftypeI,indicatingforexcellenthydro—carbongenerationconditions.Incarbonateandsandstonereservoirs,i
5、ntergranular,intergranularporesandcracksdevelopwel1.Caprocksdistributewidelyandarepreservedwell,indicatingforstrongsealingcapacity.Petroleumshowsprovethat,inbothcarbonateandsandstonereservoirsintheMiddleDevonian,unevenorganicmatterorasphaltinfillingscanbefound.Thehomogenizationtemperaturesoffluidinc
6、lusionsintheDushanFor—mationshowthatthestudyareahasexperienced2phasesofhydrocarboncharging.AttheendofDevonian,thesouthernGuishouprovincewastheupliftingareaoftheZiyunMovement,hencewasfavorableforpetroleumchargingduringtheearlyCarboniferous.Petroleummigratedalongcrackstothereefflatlimestonereservoirsa
7、ndthelittoralsandstonereservoirsinplatformsandplatformedges.Keywords:mudstonesourcerock;petroleumaccumulationassemblage;petroleumshow;accumulationhistory;DushanFormation;MiddleDevonian;southernGuizhou