Geochemical studies on high-efficiency hydrocarbon expulsion of Triassic lacustrine shale in the Ordos Basin, China: implications for tight and shale oil accumulation
Geochemical studies on high-efficiency hydrocarbon expulsion of Triassic lacustrine shale in the Ordos Basin, China: implications for tight and shale oil accumulation
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中国鄂尔多斯盆地三叠系湖相页岩高效排烃地球化学研究:对致密油和页岩油成藏的影响
DOI:
10.1088/1755-1315/600/1/012044
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发表时间:
2020-12
期刊:
影响因子:
--
通讯作者:
Wenzheng Zhang
中科院分区:
文献类型:
--
作者:
Weiwei Yang;Wenzheng Zhang
Theorganic-richsedimentsdevelopedatthebottomofChang7MemberoftheUpperTriassicYanchangformation,whichcanbedividedintooilshaleandblackmudstones,aredominatesourcerocksforlowpermeabilityandtightoilreservoirsinMesozoicpetroleumsystemofOrdosBasin.Thehydrocarbonexpulsioncharacteristicsoftheorganic-richsedimentshavebeeninvestigatedbygeologyandgeochemistrydata.Bycomparisonwiththegeochemicalparametersofcrudeoilsamplesandmudstoneextracts,Chang7shalehasmanygeochemicalevidencesonhighratesofhydrocarbonexpulsion.Lowerconversionrateofchloroformextractedbitumen"A",especiallyforthesampleswithTOChigherthan10%;lowerproductivityindexesandlowerhydrogenindexesreducingwithTOCincreasing;lowerratiosofsaturates/aromaticsbuthighercontentsofpolarcomponentsforresidualbitumen"A";heavierstablecarbonisotopesofresidualhydrocarbons.Itshouldbenotedthatthesourcerockevaluationandoil-sourcecorrelationwouldbemisunderstoodbasedontheseabnormalgeochemicaldatacausedbyhigh-efficiencyhydrocarbonexpulsion.Calculationforrocksampleshaveshownthattheexpelledratesoftheshalesamplesaveraging70%aresignificantlyhigherthanthoseofthemudstonesamples.Chang7shalewithlargeamountsofhydrocarbonsgeneratedandexpellediscriticalforhydrocarbonaccumulationinlow-permeabilityandtightoilreservoirs.Also,Chang7organic-richrocksisanimportantexplorationfieldofshaleoilinthefuture.
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影响因子:
7.5
作者:
L. De-sheng
通讯作者:
L. De-sheng
DOI:
10.1144/gsl.sp.1991.059.01.03
发表时间:
1991
期刊:
Geological Society, London, Special Publications
影响因子:
--
作者:
D. Leythaeuser;H. S. Poelchau
通讯作者:
D. Leythaeuser;H. S. Poelchau
影响因子:
4.2
作者:
Weiwei Yang;Guangdi Liu;Yuan Feng
通讯作者:
Weiwei Yang;Guangdi Liu;Yuan Feng
影响因子:
4.2
作者:
A. Pepper;T. Dodd
通讯作者:
A. Pepper;T. Dodd
影响因子:
7.5
作者:
Ma Jun
通讯作者:
Ma Jun