鄂尔多斯盆地延长组浊积岩特征及其影响因素
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摘要
鄂尔多斯盆地延长组浊积岩成藏条件优越,是油气勘探的重要目标接替区。在坳陷型湖盆中寻找浊积岩,在对其特征进行详细认识的基础上重点研究并总结出浊积岩发育的控制因素。利用实测野外剖面、常规测井、电阻率成像等资料的解释分析方法,对延长组浊积岩及其相关地层的岩性、结构、构造等特征进行了观察总结,结合已知的浊积岩分布规律,认识了延长组浊积岩的形成机理及影响因素。该区浊积岩的发育主要受地震、洪水等动力机制的影响,受物源供给、气候条件、斜坡坡度、底形迁移等环境条件的制约,秦岭造山运动间接控制了浊积岩发育的动力机制与环境条件。盆地西南缘长7段与长6段三角洲前缘的半深湖-深湖环境中具有浊积岩分布的条件,下一步勘探应该重视华池-庆阳-宁县一带。
In Yanchang formation,Ordos basin,accumulation condition of turbidites is superior,so it is a very important target area for oil and gas exploration replacement.However,to find turbidites in depression basin,first,we should make a detailed understanding of its characteristics,then focus on study of controlling factors of turbidites.By measuring the field profiles,analyzing data of conventional logging and FMI,we have observed lithology,structure,conformation and other characteristics of the turbidite,in Yanchang formation.Combined with distribution of turbidites that we had known,we have recognized the origin and controlling factors of turbidites in Yanchang formation.Origin of turbidites in this area is earthquakes and floods.Distribution of turbidites is controlled by source supply,climate,slope gradient and migration of basin bottom.Dynamic mechanisms and environmental conditions of turbidites development are indirectly controlled by Qinling orogenic.The results show that in southwest of Ordos basin,the deep-semi-deep lake which in front of fore-delta in Chang7 and Chang6 formation have conditions for the distribution and formation of turbidites,further exploration should be Huachi-Qingyang-Ningxian area.
In Yanchang formation,Ordos basin,accumulation condition of turbidites is superior,so it is a very important target area for oil and gas exploration replacement.However,to find turbidites in depression basin,first,we should make a detailed understanding of its characteristics,then focus on study of controlling factors of turbidites.By measuring the field profiles,analyzing data of conventional logging and FMI,we have observed lithology,structure,conformation and other characteristics of the turbidite,in Yanchang formation.Combined with distribution of turbidites that we had known,we have recognized the origin and controlling factors of turbidites in Yanchang formation.Origin of turbidites in this area is earthquakes and floods.Distribution of turbidites is controlled by source supply,climate,slope gradient and migration of basin bottom.Dynamic mechanisms and environmental conditions of turbidites development are indirectly controlled by Qinling orogenic.The results show that in southwest of Ordos basin,the deep-semi-deep lake which in front of fore-delta in Chang7 and Chang6 formation have conditions for the distribution and formation of turbidites,further exploration should be Huachi-Qingyang-Ningxian area.
引文
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[4]赵俊兴,李凤杰,罗媛,等.鄂尔多斯盆地南部长6和长7油层浊流事件的沉积特征及发育模式[J].石油学报,2008,29(3):389-394.
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[10]王起琮,李文厚,王岚,等.鄂尔多斯盆地东南部三叠系延长组一段湖相浊积岩特征及意义[J].地质科学,2006,41(1):54-63.
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[12]李书恒,赵继勇,崔攀峰,等.超低渗透储层开发技术对策[J].岩性油气藏,2008,20(3):128-131.
[13]庞军刚,李文厚,石硕,等.鄂尔多斯盆地长7段浊积岩沉积演化模式及石油地质意义[J].岩性油气藏,2009,21(4):73-77.
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[16]Richard Labourdette,Martine Bez.Element Migrationin Turbidite Systems:Random or Systematic Deposi-tional Processes?[J].AAPG Bulletin,2009,94(3):345-368.
[17]张关龙,陈世悦,鄢继华,等.三角洲前缘滑塌浊积体形成过程模拟[J].沉积学报,2006,24(1):50-55.
[18]鄢继华,陈世悦,姜在兴,等.三角洲前缘滑塌浊积岩形成过程初探[J].沉积学报,2004,22(4):573-578.
[19]Ercilla G,Alonso B,et al.Origin,SedimentaryProcesses and Depositional Evolution of the AgadirTurbidite System,Central Eastern Atlantic[J].Jour-nal of the Geological Society,1998,155:929-939.
[20]Simon A J,Pattison.Storm-influenced Prodelta Turbi-dite Complex in the Lower Kenilworth Member atHatch Mesa,Book Cliffs,Utah,U.S.A.:Implica-tions for Shallow Marine Facies Models[J].Journal ofSedimentary Research,2005,75(3):420-439.
[21]Schofield D I,Davies J R,et al.A New Early SilurianTurbidite System in Central Wales:Insights into Eu-static and Tectonic Controls on Deposition in theSouthern Welsh Basin[J].Geological Magazine,2009,146(1):121-132.
[22]David C,Twichell,Veeann,Cross A,et al.SeismicArchitecture and Lithofacies of Turbidites in Lake-Mead(Arizona and Nevada,U.S.A.):an Analoguefor Topographically Complex Basins[J].Journal ofSedimentary Research,2005,75(1):134-148.
[23]杜远生.秦岭造山带及临区的伸展-挤压演化节律[J].地学前缘,1997,3(3):1-2.
[24]张国伟,孟庆任,于在平,等.秦岭造山带的造山过程及其动力学特征[J].中国科学:D辑,1996,26(3):193-200.
[25]于在平,崔海峰.造山运动与秦岭造山[J].西北大学学报:自然科学版,2003,33(1):65-69.
[26]杨友运.印支期秦岭造山活动对鄂尔多斯盆地延长组沉积特征的影响[J].煤田地质与勘探,2005,32(5):7-9.
[2]Shanmugam G.Ten Turbidite Myths[J].Earth-Sci-ence Reviews,2002,58(3-4):311-341.
[3]何起祥,刘招君,王东坡,等.湖相浊积岩的主要特征及其地质意义[J].沉积学报,1984,4(2):34-44.
[4]赵俊兴,李凤杰,罗媛,等.鄂尔多斯盆地南部长6和长7油层浊流事件的沉积特征及发育模式[J].石油学报,2008,29(3):389-394.
[5]范晓.川西三叠纪马尔康盆地的浊积岩相与物源分析[J].四川地质学报,2009,29(6):14-20.
[6]陈全红,李文厚,郭艳琴,等.鄂尔多斯盆地南部延长组浊积岩体西及油气勘探意义[J].地质学报,2006,80(5):656-663.
[7]王金铎,韩文功,郑建斌,等.东营凹陷沙三段浊积岩体系及其油气勘探意义[J].石油学报,2003,24(6):24-29.
[8]傅强,吕苗苗,刘永斗,等.鄂尔多斯盆地晚三叠世湖盆浊积岩发育特征及地质意义[J].沉积学报,2008,26(2):186-192.
[9]郑荣才,文华国,韩永林,等.鄂尔多斯盆地白豹地区长6油层组湖底滑塌浊积扇沉积特征及其研究意义[J].成都理工大学学报:自然科学版,2006,33(6):566-575.
[10]王起琮,李文厚,王岚,等.鄂尔多斯盆地东南部三叠系延长组一段湖相浊积岩特征及意义[J].地质科学,2006,41(1):54-63.
[11]赵应成,王天琦,田光荣,等.低渗透油田富集区预测技术研究[J].岩性油气藏,2007,19(1):21-26.
[12]李书恒,赵继勇,崔攀峰,等.超低渗透储层开发技术对策[J].岩性油气藏,2008,20(3):128-131.
[13]庞军刚,李文厚,石硕,等.鄂尔多斯盆地长7段浊积岩沉积演化模式及石油地质意义[J].岩性油气藏,2009,21(4):73-77.
[14]Heezen B C,Tharp,et al.The Floors of the Oceans:I.The North Atlantic[J].Geological Society of Amer-ica Special Paper,1959,65:122.
[15]Pratson L F.et al.What is the Slope of the US Conti-nental Slope?[J].Geology,1996,24:3-6.
[16]Richard Labourdette,Martine Bez.Element Migrationin Turbidite Systems:Random or Systematic Deposi-tional Processes?[J].AAPG Bulletin,2009,94(3):345-368.
[17]张关龙,陈世悦,鄢继华,等.三角洲前缘滑塌浊积体形成过程模拟[J].沉积学报,2006,24(1):50-55.
[18]鄢继华,陈世悦,姜在兴,等.三角洲前缘滑塌浊积岩形成过程初探[J].沉积学报,2004,22(4):573-578.
[19]Ercilla G,Alonso B,et al.Origin,SedimentaryProcesses and Depositional Evolution of the AgadirTurbidite System,Central Eastern Atlantic[J].Jour-nal of the Geological Society,1998,155:929-939.
[20]Simon A J,Pattison.Storm-influenced Prodelta Turbi-dite Complex in the Lower Kenilworth Member atHatch Mesa,Book Cliffs,Utah,U.S.A.:Implica-tions for Shallow Marine Facies Models[J].Journal ofSedimentary Research,2005,75(3):420-439.
[21]Schofield D I,Davies J R,et al.A New Early SilurianTurbidite System in Central Wales:Insights into Eu-static and Tectonic Controls on Deposition in theSouthern Welsh Basin[J].Geological Magazine,2009,146(1):121-132.
[22]David C,Twichell,Veeann,Cross A,et al.SeismicArchitecture and Lithofacies of Turbidites in Lake-Mead(Arizona and Nevada,U.S.A.):an Analoguefor Topographically Complex Basins[J].Journal ofSedimentary Research,2005,75(1):134-148.
[23]杜远生.秦岭造山带及临区的伸展-挤压演化节律[J].地学前缘,1997,3(3):1-2.
[24]张国伟,孟庆任,于在平,等.秦岭造山带的造山过程及其动力学特征[J].中国科学:D辑,1996,26(3):193-200.
[25]于在平,崔海峰.造山运动与秦岭造山[J].西北大学学报:自然科学版,2003,33(1):65-69.
[26]杨友运.印支期秦岭造山活动对鄂尔多斯盆地延长组沉积特征的影响[J].煤田地质与勘探,2005,32(5):7-9.
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