資源描述:
《川東南龍馬溪組頁(yè)巖的礦物組成與微觀儲(chǔ)集特征研究.pdf》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫(kù)。
1、第37卷第3期石油察鼯弛屆Vo1.37,No.32015年5月PETR0LEUMGEoL0GY&EXPERⅡENTMay,2015文章編號(hào):1001-6112(2015)03-0328—06doi:10.7603/s40972-015-0050—2川東南龍馬溪組頁(yè)巖的礦物組成與微觀儲(chǔ)集特征研究劉友祥,俞凌杰,張慶珍,鮑芳,盧龍飛(中國(guó)石化石油勘探開發(fā)研究院無(wú)錫石油地質(zhì)研究所,江蘇無(wú)錫214151)摘要:通過(guò)巖石學(xué)特征、礦物組成、微觀孔隙和力學(xué)性質(zhì)等分析,對(duì)川東南地區(qū)龍馬溪組頁(yè)巖的礦物組成與微觀儲(chǔ)集特征進(jìn)行了綜合研究。研究結(jié)果表明,龍馬溪組頁(yè)巖主要由石英和黏土礦物組成,平均含量分別為36
2、.07%和41.55%,碳酸鹽巖含量較低.平均9.92%,底部石英含量最高,向上含量降低,黏土含量增加;頁(yè)巖中硅質(zhì)含有豐富的生物碎屑,表明主要為生物成因。頁(yè)巖主要發(fā)育有機(jī)質(zhì)孔隙和無(wú)機(jī)礦物孔隙,后者的粒緣微裂縫較發(fā)育,而粒內(nèi)和粒間孔隙相對(duì)較少。頁(yè)巖中石英含量與頁(yè)巖孔容呈正相關(guān)關(guān)系.表明生物來(lái)源硅質(zhì)的孔隙對(duì)頁(yè)巖總孔隙有重要貢獻(xiàn),生物來(lái)源硅質(zhì)的存在也提高了頁(yè)巖脆性,有利于儲(chǔ)層的后期壓裂改造。關(guān)鍵詞:微觀孑L隙;礦物組成;頁(yè)巖;龍馬溪組;川東南中圖分類號(hào):TEl22.2文獻(xiàn)標(biāo)志碼:AMineralcompositionandmicroscopicreservoirfeaturesofLongm
3、axishalesinsoutheasternSichuanBasinLiuYouxiang,YuLingjie,ZhangQingzhen,BaoFang,LuLongfei(WuxiResearchInstituteofPetroleumGeology,SINOPEC,Wuxi,Jiangsu214151,China)Abstract:MineralcompositionsandmicroscopicreservoirfeaturesoftheLongmaxishalesinthesoutheasternSichuanBasinwerecomprehensivelystudiedu
4、singtheanalysesofpetrologicalcharacteristics,mineralcompositions,microscopicporestructuresandrockmechanics.TheresultsshowthatquartzandclaymineralsareabundantintheLongmaxishaleswithaveragecontentsof36.07%and41.55%respectively,whilecarbonatemineralsarepoorwithanaveragecontentof9.92%.Quartzisespeci
5、allyrichatthebottomoftheLongmaxishales.Asburialdepthdecreases,thecontentofquartzislesswhileclaymineralcontentincreases.Abundantbioclastsindicatethatsiliceousmatterismainlybiogenetic.ManyinorganicandorganicporesarefoundintheLongrnaxishales.Granularmarginmicro—fracturesdevelopwellininorganicpores,
6、whileintergranularandintragranularporesarelesscommon.Thereisapositivecorrelationbetweenquartzcontentandporevolume,whichindicatesthatbiogenicsilicaporesplayanimportantroleinthedevelopmentofporosity.Biogenicsilicacontributestoahighcontentofbrittleminerals,whichisfavorableforfracturingtreatment.Key
7、words:micro—pores;mineralcomposition;shale;LongmaxiFormation;southeasternSichuanBasin頁(yè)巖氣主要以吸附或游離態(tài)賦存于泥頁(yè)巖中,儲(chǔ)集性能是影響氣藏產(chǎn)量的重要因素,但由于頁(yè)還有少量以溶解態(tài)形式存在于液態(tài)烴或地層水中。巖組成及結(jié)構(gòu)復(fù)雜,具有多尺度孔徑、超低滲透率、各近年來(lái)。國(guó)內(nèi)外眾多學(xué)者從頁(yè)巖氣賦存狀態(tài)、成藏特向異性顯著等特點(diǎn),詳細(xì)刻畫頁(yè)巖孔隙特征并非易征、資源評(píng)價(jià)等