AHDEB油田白垩系油藏油气充注期次的流体包裹体证据
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摘要
伊拉克AHDEB油田油藏成藏规律对油田后期开发具有重要意义,与埋藏史相结合的流体包裹体研究是揭示油藏油气成藏期次和时间的有效手段.利用伊拉克AHDEB油田白垩系油藏储层样品对流体包裹体特征进行了分析,并且通过流体包裹体的显微观察、荧光颜色、单一包裹体的红外光谱和均一温度测定,结合地质背景对该油田的油充注期次进行了研究.研究表明,油包裹体以发绿色和黄绿色荧光为主,少数发浅黄色和黄褐色荧光.油包裹体的显微傅立叶红外光谱测定结果计算的CH2a/CH3a、Xinc、Xstd可划分油的成熟度,表明存在两种成熟度的油.最后,根据均一温度测定结果,结合埋藏史和热史,认为该油田可能存在4期油充注成藏相关的流体活动:第1成藏期发生在95.0~96.5Ma,相当于晚白垩世早期;第2成藏期为71.0~78.5Ma,相当于晚白垩世晚期,第1期和第2期烃源岩排烃规模小,产生中-重质油,后期遭受氧化而形成沥青;第3成藏期发生在14.0~15.0Ma,相当于中中新世,处于生排烃高峰期,为主要成藏期;第4期发生在10.0Ma左右,与第3期为多幕连续充注.
The uncertainty of pool-forming rule of AHDEB oilfield in Iraq has influenced the oilfiled development.Combining with burial history,the study of fluid inclusion is effective to reveal the hydrocarbon charging period and time.The samples collected from Cretaceous reservoirs of AHDEB oil field in Iraq were used to study the characteristics of fluid inclusion.Based on the observation of thin sections and the fluorescence color,measurement ofμFT-IR and homogenization temperature,combining with analysis of geologic setting,the hydrocarbon charging periods were researched.The results show that the fluorescence colors of oil inclusion were mainly green and yellow-green,while minor light yellow and yellowish-brown.It is found by the measurement ofμFT-IR of oil inclusion that there are 2 types of maturity based on the value of CH2a/CH3 a,Xincand Xstd.The data of burial history,thermal evolution history and the homogenization temperature indicate that there might be four terms of oil accumulation.The first term of oil charging occurred at 95.0-96.5Ma,equivalent to early Late-Cretaceous,andthe second term occurred at 71.0-78.5Ma,equivalent to late Late-Cretaceous,which were consistent with the small scale of hydrocarbon generation by producing heavy oil that in turn was oxidized to asphalt.The third term of oil charging occurred at 14.0-15.0Ma,equivalently Middle Miocene,which was the main accumulation,being consistent with the peak of hydrocarbon generation.The forth term occurred at 10.0Ma,which was the charging event related to the third term.
The uncertainty of pool-forming rule of AHDEB oilfield in Iraq has influenced the oilfiled development.Combining with burial history,the study of fluid inclusion is effective to reveal the hydrocarbon charging period and time.The samples collected from Cretaceous reservoirs of AHDEB oil field in Iraq were used to study the characteristics of fluid inclusion.Based on the observation of thin sections and the fluorescence color,measurement ofμFT-IR and homogenization temperature,combining with analysis of geologic setting,the hydrocarbon charging periods were researched.The results show that the fluorescence colors of oil inclusion were mainly green and yellow-green,while minor light yellow and yellowish-brown.It is found by the measurement ofμFT-IR of oil inclusion that there are 2 types of maturity based on the value of CH2a/CH3 a,Xincand Xstd.The data of burial history,thermal evolution history and the homogenization temperature indicate that there might be four terms of oil accumulation.The first term of oil charging occurred at 95.0-96.5Ma,equivalent to early Late-Cretaceous,andthe second term occurred at 71.0-78.5Ma,equivalent to late Late-Cretaceous,which were consistent with the small scale of hydrocarbon generation by producing heavy oil that in turn was oxidized to asphalt.The third term of oil charging occurred at 14.0-15.0Ma,equivalently Middle Miocene,which was the main accumulation,being consistent with the peak of hydrocarbon generation.The forth term occurred at 10.0Ma,which was the charging event related to the third term.
引文
Abeed,Q.,Alkhafaji,A.,Littk,R.,2011.Source Rock Potential of the Upper Jurassic-Lower Cretaceous Succession in the Southern Mesopotamian Basin,SouthernIraq.Journal of Petroleum Geology,34(2):117-134.doi:10.1111/j.1747-5457.2011.00497.x
Al-Ameri,T.K.,Al-Musawi,F.A.,2009.Hydrocarbon Generation Potential of the Uppermost Jurassic—BasalCretaceous Sulaiy Formation,South Iraq.Arab Journalof Geosciences,4(1-2):53-58.doi:10.1007/s12517-00 9-0064-y
Al-Ameri,T.K.,Al-Obaydi,R.Y.,2011.Cretaceous Petroleum System of the Khasib and Tannuma Oil Reservoir,East Baghdad Oil Field,Iraq.Arab Journal of Geosciences,4:915-932.doi:10.1007/s12517-009-0115-4
Al-Dabbas,M.,Al-Jassim,J.,Al-Jumaily,S.,2010.Depositional Environments and Porosity Distribution in Re-gressive Limestone Reservoirs of the Mishrif Formation,Southern Iraq.Arab Journal of Geosciences,3(1):67-78.doi:10.1007/s12517-009-0057-x
Aqrawi,A.A.M.,Goff,J.C.,Horbury,A.D.,et al.,2010.The Petroleum Geology of Iraq.Scientific Press,Beaconsfield.
Burruss,R.C.,Cercone,K.R.,Harris,P.M.,1985.Timing of Hydrocarbon Migration:Evidence from Inclusions inCalcite Cements,Tectonic and Burial History.Carbonate Cements SEPMS Pec.Publ.,26:277-289.
Davies,R.B.,Casey,D.M.,Horbury,A.D.,et al.,2002.Early to Mid-Cretaceous Mixed Carbonate-SiliciclasticShelfal Systems:Examples,Issues and Models from theArabian Plate.GeoArabia,7(3):541-598.
George,S.C.,Ruble,T.E.,Dutkiewicz,A.,et al.,2001.Assessing the Maturity of Oil Trapped in Fluid InclusionsUsing Molecular Geochemistry Data and VisuallyDetermined Fluorescence Colours.Applied Geochemistry,16:451-473.
Harris,P.M.,Frost,S,1984.Middle Cretaceous Carbonate Reservoirs,Fahud Field and NW Oman.American Association of Petroleum Geologists Bulletin,68(5):649-658.
Hou,Q.J.,Feng,Z.H.,Zou,Y.L.,2005.Study on the Pool Forming Periods of Oil and Gas in Qijia-Gulong Sag inSongliao Basin.Petroleum Geology&Experiment,27(4):390-394(in Chinese with English abstract).
Karlsen,D.A.,Nedkvitne,T.,Larter,S.R.,et al.,1993.Hydrocarbon Composition of Authigenic Inclusions Application to Elucidation of Petroleum Reservoir FillingHistory.Geochim.Cosmochim.Acta,57:3641-3659.
Li,C.Q.,Chen,H.H.,Liu,H.M.,2010.Identification of Hydrocarbon Charging Events by Using Micro-BeamFluorescence Spectra of Petroleum Inclusions.EarthScience—Journal of China University of Geosciences,35(4):657-662(in Chinese with English abstract).doi:10.3799/dqkx.2010.080
Mohialdeen,I.M.J.,Mohammed,H.H.,Al-Beyati,F.M.,2013.Geochemical and Petrographic Characterization ofLate Jurassic-Early Cretaceous Chia Gara Formation inNorthern Iraq:Palaeoenvironment and Oil-GenerationPotential.Marine and Petroleum Geology,43:166-177.doi:org/10.1016/j.marpetgeo.2013.02.010
Odisho,K.Y.,Othman,R.S.,1992.Preliminary Geochemical Evaluation of Hydrocarbon Source Rocks in Northern Parts of Iraq.Iraq Geological Journal,25:136-153.
Pitman,J.K.,Steinshouer,D.,Lewan,M.D.,2004.Petroleum Generation and Migration in the Mesopotamian Basin and Zagros Fold Belt of Iraq:Results from a BasinModeling Study.GeoArabia,9:41-72.
Si,S.H.,Chen,H.H.,Feng,Y.,et al.,2013.Two Sources and Three Charging Events of Hydrocarbons in LowerCretaceous Reservoirs in Shaya Uplift,Tarim Basin:Evidence from Fluid Inclusion Analysis.Acta PetroleiSinica,34(1):12-21(in Chinese with English abstract).doi:10.7623/syxb201301002
Sun,Q.,Weng,S.F.,Zhang,X.,1998.μFTIR Microanalysis Limits of Hydrocarbon Fluid Inclusions:Matrix Minerals Absorption.Earth Science—Journal of China University of Geosciences,23(3):248-252(in Chinesewith English abstract).
Yu,L.,Li,W.T.,Chen,H.H.,et al.,2012.Characteristics of Fluid Inclusions and Hydrocarbon Charging Period ofCarboniferous-Permian Reservoirs in the Eastern Linqing Depression.Journal of China University of Petroleum(Natural Science Edition),36(6):26-32(inChinese with English abstract).doi:10.3969/j.issn.1673-5005.2012.06.005
Zhao,Y.J.,Chen,H.H.,2008.The Relationship between Fluorescence Colors of Oil Inclusions and Their Maturities.Earth Science—Journal of China University ofGeosciences,33(1):91-96(in Chinese with English abstract).
侯启军,冯子辉,邹玉良,2005.松辽盆地齐家-古龙凹陷油气成藏期次研究.石油实验地质,27(4):390-394.
李纯泉,陈红汉,刘惠民,2010.利用油包裹体微束荧光光谱判识油气充注期次.地球科学———中国地质大学学报,35(4):657-662.
斯尚华,陈红汉,丰勇,等,2013.塔里木盆地沙雅隆起下白垩统双源三幕油气充注成藏的流体包裹体证据.石油学报,34(1):12-21.
孙青,翁诗甫,张煦,1998.傅立叶变换红外光谱分析矿物有机包裹体的限制———基体吸收问题初探.地球科学———中国地质大学学报,23(3):248-252.
于岚,李文涛,陈红汉,等,2012.临清坳陷东部石炭-二叠系流体包裹体特征及油气充注期次研究.中国石油大学学报(自然科学版),36(6):26-32.
赵艳军,陈红汉,2008.油包裹体荧光颜色及其成熟度关系.地球科学———中国地质大学学报,33(1):91-96.
Al-Ameri,T.K.,Al-Musawi,F.A.,2009.Hydrocarbon Generation Potential of the Uppermost Jurassic—BasalCretaceous Sulaiy Formation,South Iraq.Arab Journalof Geosciences,4(1-2):53-58.doi:10.1007/s12517-00 9-0064-y
Al-Ameri,T.K.,Al-Obaydi,R.Y.,2011.Cretaceous Petroleum System of the Khasib and Tannuma Oil Reservoir,East Baghdad Oil Field,Iraq.Arab Journal of Geosciences,4:915-932.doi:10.1007/s12517-009-0115-4
Al-Dabbas,M.,Al-Jassim,J.,Al-Jumaily,S.,2010.Depositional Environments and Porosity Distribution in Re-gressive Limestone Reservoirs of the Mishrif Formation,Southern Iraq.Arab Journal of Geosciences,3(1):67-78.doi:10.1007/s12517-009-0057-x
Aqrawi,A.A.M.,Goff,J.C.,Horbury,A.D.,et al.,2010.The Petroleum Geology of Iraq.Scientific Press,Beaconsfield.
Burruss,R.C.,Cercone,K.R.,Harris,P.M.,1985.Timing of Hydrocarbon Migration:Evidence from Inclusions inCalcite Cements,Tectonic and Burial History.Carbonate Cements SEPMS Pec.Publ.,26:277-289.
Davies,R.B.,Casey,D.M.,Horbury,A.D.,et al.,2002.Early to Mid-Cretaceous Mixed Carbonate-SiliciclasticShelfal Systems:Examples,Issues and Models from theArabian Plate.GeoArabia,7(3):541-598.
George,S.C.,Ruble,T.E.,Dutkiewicz,A.,et al.,2001.Assessing the Maturity of Oil Trapped in Fluid InclusionsUsing Molecular Geochemistry Data and VisuallyDetermined Fluorescence Colours.Applied Geochemistry,16:451-473.
Harris,P.M.,Frost,S,1984.Middle Cretaceous Carbonate Reservoirs,Fahud Field and NW Oman.American Association of Petroleum Geologists Bulletin,68(5):649-658.
Hou,Q.J.,Feng,Z.H.,Zou,Y.L.,2005.Study on the Pool Forming Periods of Oil and Gas in Qijia-Gulong Sag inSongliao Basin.Petroleum Geology&Experiment,27(4):390-394(in Chinese with English abstract).
Karlsen,D.A.,Nedkvitne,T.,Larter,S.R.,et al.,1993.Hydrocarbon Composition of Authigenic Inclusions Application to Elucidation of Petroleum Reservoir FillingHistory.Geochim.Cosmochim.Acta,57:3641-3659.
Li,C.Q.,Chen,H.H.,Liu,H.M.,2010.Identification of Hydrocarbon Charging Events by Using Micro-BeamFluorescence Spectra of Petroleum Inclusions.EarthScience—Journal of China University of Geosciences,35(4):657-662(in Chinese with English abstract).doi:10.3799/dqkx.2010.080
Mohialdeen,I.M.J.,Mohammed,H.H.,Al-Beyati,F.M.,2013.Geochemical and Petrographic Characterization ofLate Jurassic-Early Cretaceous Chia Gara Formation inNorthern Iraq:Palaeoenvironment and Oil-GenerationPotential.Marine and Petroleum Geology,43:166-177.doi:org/10.1016/j.marpetgeo.2013.02.010
Odisho,K.Y.,Othman,R.S.,1992.Preliminary Geochemical Evaluation of Hydrocarbon Source Rocks in Northern Parts of Iraq.Iraq Geological Journal,25:136-153.
Pitman,J.K.,Steinshouer,D.,Lewan,M.D.,2004.Petroleum Generation and Migration in the Mesopotamian Basin and Zagros Fold Belt of Iraq:Results from a BasinModeling Study.GeoArabia,9:41-72.
Si,S.H.,Chen,H.H.,Feng,Y.,et al.,2013.Two Sources and Three Charging Events of Hydrocarbons in LowerCretaceous Reservoirs in Shaya Uplift,Tarim Basin:Evidence from Fluid Inclusion Analysis.Acta PetroleiSinica,34(1):12-21(in Chinese with English abstract).doi:10.7623/syxb201301002
Sun,Q.,Weng,S.F.,Zhang,X.,1998.μFTIR Microanalysis Limits of Hydrocarbon Fluid Inclusions:Matrix Minerals Absorption.Earth Science—Journal of China University of Geosciences,23(3):248-252(in Chinesewith English abstract).
Yu,L.,Li,W.T.,Chen,H.H.,et al.,2012.Characteristics of Fluid Inclusions and Hydrocarbon Charging Period ofCarboniferous-Permian Reservoirs in the Eastern Linqing Depression.Journal of China University of Petroleum(Natural Science Edition),36(6):26-32(inChinese with English abstract).doi:10.3969/j.issn.1673-5005.2012.06.005
Zhao,Y.J.,Chen,H.H.,2008.The Relationship between Fluorescence Colors of Oil Inclusions and Their Maturities.Earth Science—Journal of China University ofGeosciences,33(1):91-96(in Chinese with English abstract).
侯启军,冯子辉,邹玉良,2005.松辽盆地齐家-古龙凹陷油气成藏期次研究.石油实验地质,27(4):390-394.
李纯泉,陈红汉,刘惠民,2010.利用油包裹体微束荧光光谱判识油气充注期次.地球科学———中国地质大学学报,35(4):657-662.
斯尚华,陈红汉,丰勇,等,2013.塔里木盆地沙雅隆起下白垩统双源三幕油气充注成藏的流体包裹体证据.石油学报,34(1):12-21.
孙青,翁诗甫,张煦,1998.傅立叶变换红外光谱分析矿物有机包裹体的限制———基体吸收问题初探.地球科学———中国地质大学学报,23(3):248-252.
于岚,李文涛,陈红汉,等,2012.临清坳陷东部石炭-二叠系流体包裹体特征及油气充注期次研究.中国石油大学学报(自然科学版),36(6):26-32.
赵艳军,陈红汉,2008.油包裹体荧光颜色及其成熟度关系.地球科学———中国地质大学学报,33(1):91-96.