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1、學(xué)兔兔www.xuetutu.com專天長氣肚第29卷第5期OIL&GASGE0L0GY2008年1O月文章編號：0253—9985(2008)05—0632—07塔河地區(qū)南部志留系柯坪塔格組油氣藏形成條件王毅，陳元壯(中國石油化工股份有限公司石油勘探開發(fā)研究院，北京100083)摘要i塔河地區(qū)南部志留系柯坪塔格組砂巖屬于低孔、低滲儲集巖，局部發(fā)育厚層濱岸相、三角洲分流河道、河口砂壩以及潮汐水道等優(yōu)質(zhì)儲集巖，發(fā)育多套儲蓋組合。塔河地區(qū)南部寒武一奧陶系烴源巖形成的烴類，沿著斷裂、裂隙、砂巖和不整合面經(jīng)過上奧陶統(tǒng)桑塔木組泥巖
2、運(yùn)移到柯坪塔格組砂巖聚集成藏?？缕核窠M油氣藏以喜馬拉雅期成藏為主，發(fā)育背斜、地層不整合遮擋、地層超覆、巖性以及構(gòu)造一巖性復(fù)合型等5種油氣藏類型，圍繞塔河北部高部位志留系剝蝕尖滅線附近是地層不整合遮擋油氣藏有利成藏區(qū)，往南是背斜、地層超覆及巖性、構(gòu)造一巖性復(fù)合型油氣藏有利成藏區(qū)。志留系砂巖具有深埋藏、大面積、低豐度、薄油氣層、斷層溝通、疊合連片的油氣聚集特點(diǎn)，可能還存在致密砂巖氣藏，油氣資源潛力可觀。關(guān)鍵詞：儲集巖；油氣藏類型；分布模式；油氣資源潛力；志留系；塔河南部中圖分類號：TEl22．3文獻(xiàn)標(biāo)識碼：AConditi
3、onsofhydrocarbonpoolingintheSilurianKepingtageFormationinthesouthernTaheregionoftheTarimBasinWangYi，ChenYuanzhuang(PetroleumExploration,andProductionResearchInstitute，SINOPEC，Beijing100083，China)Abstract：Basedonanintegratedanalysisoftheconditionsofhydrocarbonpool
4、ing，typesanddistributionofthereservoirsintheLowerSilurianKepingtageFormationinthesouthernTaheregionoftheTarimbasin，thispaperfocusesonthedistributionpatternsoftheSilurianhydrocarbonreservoirsinthesouthernTaheregionandesti-matesthehydrocarbonpotentialinthisarea．The
5、Kepingtagesandstonesareresetaroirrockswithlowporosityandlowpermeability，butsomeofthemarequalityreservoirs，suchasthickshoresidefacies，distributarychannelsindelta，mouthbarsandtidalchanne1．Severalreservoir-sealcombinationsweredevelopedintheSilurian．Hydro—carbonsgene
6、ratedfromtheCambro·-OrdoviciansourcerocksinthesouthernTaheregionmigratedtoandaeeu·-mulatedintheKepingtagesandstonesthroughUpperOrdovicianSangtamumudstoneviafaults，fractures，sand—stonelayersandunconformities．Fivetypesofreservoirs，includinganticline，unconformitybar
7、rier，onlap，litholog-icalandstructural-lithologicalcombinationreservoirs，arerecognizedintheKepingtageFormationandweremainlydevelopedintheHimalayanperiod．Theunconformitybarierreservoirsaremainlydistributedaroundthedenudationpinch—outlineoftheSilurianinthehighofthen
8、orthernTahearea，whiletheanticline，onlap，litho—logicalandstructural—lithologicalcombinationreservoirsaremainlydistributedinthesouthernTahearea．TheSi—luriansands
