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1、第23卷第7期中國(guó)礦業(yè)VoI_23，No．72014年7月CHINAMININGMAGAZINEJu1．2014地質(zhì)找礦我國(guó)低煤階煤層氣成因類型及成藏模式研究侯海海，邵龍義，唐躍，王y，王學(xué)天，劉雙(1_中國(guó)礦業(yè)大學(xué)(北京)地球科學(xué)與測(cè)繪工程學(xué)院，北京100083；2．中國(guó)地質(zhì)調(diào)查局油氣資源調(diào)查中心，北京100029)摘要：基于國(guó)內(nèi)外低煤階煤層氣的富集特點(diǎn)和成藏理論的追蹤，對(duì)我國(guó)低煤階煤層氣的成因類型和成藏模式展開了研究。結(jié)果表明，我國(guó)低煤階煤層氣藏成因類型有熱成因、生物成因和混合成因；煤儲(chǔ)層特征包括
2、埋藏淺、含氣量低、厚度大、滲透率高且易改造及與其它油氣共生等特點(diǎn)；前人從巖性、構(gòu)造條件及煤儲(chǔ)層所處位置、水文地質(zhì)條件等對(duì)低煤階煤層氣的成藏模式進(jìn)行了劃分。基于以上研究，認(rèn)為應(yīng)以動(dòng)態(tài)的觀點(diǎn)來認(rèn)識(shí)和探討以有利成煤相帶為煤層氣富集的物質(zhì)基礎(chǔ)、以構(gòu)造體為煤層氣運(yùn)移壓差和以水動(dòng)力條件為氣源補(bǔ)給和封蓋的條件的低煤階煤層氣成藏模式。以東北依蘭盆地為例，結(jié)合我國(guó)低煤階煤層氣盆地的地質(zhì)特征和前人研究成果，建立了我國(guó)低煤階煤層氣的成藏富集模式，即原生成因和次生成因疊合下的斜坡區(qū)成煤優(yōu)勢(shì)相帶高富水區(qū)的煤層氣富集模式。關(guān)鍵詞
3、：低煤階；煤層氣；成因類型；成藏模式；動(dòng)態(tài)；優(yōu)勢(shì)相帶中圖分類號(hào)：P571文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1004—4051(2014)07—0066—04StudyoncoalbedmethanegenetictypesandformationmodelsoflowrankcoalinChinaHOUHal—hai，SHAOIong—yi，TANGYue，WANGShuai，WANGXue—tian，LIUShuang(1．SchoolofEarthSciencesandSurveyingEngineerin
4、g，ChinaUniversityofMiningandTechnology(Beijing)，Beijing100083，China；2．CenterofOil&GasResourceSurvey，ChinaGeologicalSurvey，Beijing100029，China)Abstract：Basedonenrichmentcharacteristicsandformationtheoryabout1OWrankcoa1bedmethane(LCBM)athomeandabroad，nati
5、onalLCBMgenetictypesandformationmodelshavebeenstudied．TheresultsshowthatgenetictypesofLCBMincludethermogenicmethane，biogenicmethaneandmixedmethane．Thecharacteristicsoflowrankcoalreservoirincludeshallowbury，lowcontents，largethickness，highpermeabilityandt
6、ransformedeasily．coexistingwithotheroilgas．Basedonthepreviousresearchresultsofformationmodelsdividingthroughlithology，structureconditions，locationsandhydrogeololgyconditions，synthesizedynamicformationmodelhasbeenproposedinthispaper，includingmaterialbase
7、offavorablesedimentalenvironment，migrationpressuredifferenceofconstructs，methanesupplyandpreserveofhydrogeololgyconditions，discussingnewthoughtofselectingareaofLCBM．TakingYilancoal—bearingbasinforanexample，combinedpreviousresearchresultsandgeologicalcon
8、ditions，reservoirformingandaccumulationmodelofICBMinChinaisproposed，whichisadvantagecoalfacesrichwaterareaaccumulationmodelinslopewithcouplingbetweenprimaryandsecondaryorigin．Keywords：lowrank；coal—bedmethane；genetictypes；formatio
