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1、第37卷第1期石油霧鼢沾廈Vo1.37.No.12015年1月PETROLEUMGE0LoGY&EXPERIMENTJan.,2015文章編號:1001—6112(2015)01-0057-07doi:10.1l781/ysydz20l5O1O57亞諾斯盆地LB區(qū)塊油氣成藏特征與富集規(guī)律馮方,王曉杰,胡俊峰,胡平,王煥(1.中國石化國際石油勘探開發(fā)有限公司,北京10(X)83;2.北京溫菲爾德石油技術(shù)開發(fā)有限公司,北京100191)摘要:在區(qū)域油氣成藏條件、運聚特征研究的基礎(chǔ)上,總結(jié)亞諾斯盆地LB區(qū)塊成藏主控因素及成藏模式,探討局部油氣富集的影響因素,預(yù)測有利勘探方向。L
2、B區(qū)塊是油氣運聚的優(yōu)勢指向區(qū),主力儲層卡沃內(nèi)拉組內(nèi)部發(fā)育多套儲蓋組合,圈閉類型主要為與正斷層伴生的低幅斷背斜、斷鼻構(gòu)造;區(qū)塊油氣成藏的主控因素是構(gòu)造與儲層,它源油氣沿c7層塊狀砂巖側(cè)向運移,首先在層內(nèi)構(gòu)造圈閉中聚集成藏,部分油氣被后期斷層作用垂向輸導(dǎo)到C5層,并在該層底部緊鄰斷層的構(gòu)造、巖性圈閉內(nèi)再次聚集成藏.局部油氣富集受構(gòu)造背景、圈閉幅度及儲層質(zhì)量等因素共同控制;區(qū)內(nèi)預(yù)測發(fā)育有c7層遠離斷層的低幅背斜型油藏、c5層斷層下降盤巖性上傾尖滅型油藏。關(guān)鍵詞:儲蓋組合;主控因素;成藏模式;富集規(guī)律;亞諾斯盆地中圖分類號:TE122.3文獻標(biāo)識碼:AHydrocarbonacc
3、umulationcharacteristicsandenrichmentcontrolsofLBblockinLlanosBasinFengFang,WangXiaojie,HuJunfeng,HuPing,WangHuan(1.S1NOPECInternationalPetroleumExplorationandProductionCorporation,Beijing100083,China;2.BeijingWinfieldPetroleumTechnologyCo.LTD.,Beifing100191,China)Abstract:Basedontheanaly
4、sisofhydrocarbongeneration,migrationandaccumulation,thecontrollingele—mentsandpatternofreservoirsintheLBblockoftheLlanosBasinweresummarized.Theinfluencingfactorsforlocalhydrocarbonenrichmentwereidentified,andfavorableexplorationtargetswerepredicted.TheLBblockhadagoodpotentialforhydrocarbo
5、nmigrationandaccumulation.Inthemajorreservoir(theCarboneraFormation),multiplesetsofreservoir—capassemblagesdeveloped.Trapsincludedfaultednosesandfaultedanticlinesassocia-tedwithnormalfaults.Structureandreservoirwerethemaincontrollingfactorsofhydrocarbonaccumulation.Hy·drocarbonmigratedlat
6、erallyalongmassivesandstonesintheC7sectionoftheCarboneraFormation.Firstly,theyaccumulatedinstructuraltrapsintheC7section,andthenpartiallymigratedupwardsintotheC5sectionthroughfaultsandaccumulatedinstructuralandlithologictrapsadjacenttothefaultsatthebottomofC5.Localhydrocar-bonenrichmentwa
7、saffectedbyvariousfactors,suchastectonicbackground,trapamplitudeandreservoirquali-ty.Low—amplitudefaultedanticlinereservoirsdevelopedfarawayfromfaultsintheC7sectionandlithologicupdippinch.outreservoirsinthedownthrownsideoffaultsintheC5sectionwerepredicted.Keywords:r