海拉尔盆地呼和湖凹陷下白垩统层序构成样式及油气成藏模式
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摘要
分析在不同构造背景下发育的层序构成样式,可以更加精确地预测有利勘探区带和油气藏。利用地震、钻井、测井、岩心以及古生物等资料,依据层序界面特征,将呼和湖凹陷下白垩统划分为3个二级层序、5个三级层序。依据构造背景,将研究区划分出断控陡坡带、缓坡断阶带、洼槽带等3种构造单元,在此基础上分不同构造单元建立了相应的层序构成样式:断控陡坡型层序构成样式、缓坡断阶型层序构成样式、洼槽型层序构成样式。研究结果表明,不同的构造单元具有各自特征的层序构成样式和沉积体系域构成模式,不同类型层序构成样式也决定了不同的构造单元具有不同的油气成藏模式。在断控陡坡带主要发育断层-岩性和断鼻型油气藏,在缓坡断阶带发育断层-岩性和地层超覆型油气藏,在洼槽带主要发育自生自储型的透镜体油气藏;此外,洼槽边缘可发育断层-岩性型油气藏。
Favorable exploration areas and oil and gas reservoir can be predicted more accurately though analysis of sequence architecture pattern in different tectonic settings.Using seismic,drilling,logging,core,paleontology and so on,according to sequence interface characteristics,Lower Cretaceous in Huhehu depression is divided into 3 second-order sequences,5 third-order sequences.On the base of structure background,Huhehu depression is divided into fault controlled steep slope zone,gentle slope fault terrace zone and depression zone.Different tectonic units show different sequence architecture patterns: fault controlled steep slope zone sequence architecture patterns,gentle slope fault terrace zone sequence architecture patterns and depression zone sequence architecture patterns.The results show that different tectonic units have specific characteristics of sequence architecture patterns and sedimentary system composing model,and different types of sequence architecture patterns control oil-gas formation models.Fault-lithology oil and gas reservoir,fault oil and gas reservoir mainly develop in fault controlled steep slope zone sequence architecture patterns;Fault-lithology oil and gas reservoir,and stratigraphic overlap oil and gas reservoir mainly develop in gentle slope fault terrace zone;Authigenic reservoir lens reservoir mainly develops in depression zone.Moreover,depression edge can develop fault-lithology oil and gas reservoir.
Favorable exploration areas and oil and gas reservoir can be predicted more accurately though analysis of sequence architecture pattern in different tectonic settings.Using seismic,drilling,logging,core,paleontology and so on,according to sequence interface characteristics,Lower Cretaceous in Huhehu depression is divided into 3 second-order sequences,5 third-order sequences.On the base of structure background,Huhehu depression is divided into fault controlled steep slope zone,gentle slope fault terrace zone and depression zone.Different tectonic units show different sequence architecture patterns: fault controlled steep slope zone sequence architecture patterns,gentle slope fault terrace zone sequence architecture patterns and depression zone sequence architecture patterns.The results show that different tectonic units have specific characteristics of sequence architecture patterns and sedimentary system composing model,and different types of sequence architecture patterns control oil-gas formation models.Fault-lithology oil and gas reservoir,fault oil and gas reservoir mainly develop in fault controlled steep slope zone sequence architecture patterns;Fault-lithology oil and gas reservoir,and stratigraphic overlap oil and gas reservoir mainly develop in gentle slope fault terrace zone;Authigenic reservoir lens reservoir mainly develops in depression zone.Moreover,depression edge can develop fault-lithology oil and gas reservoir.
引文
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[14]黄传炎,王华,肖敦清,等.板桥凹陷断裂陡坡带沙一段层序样式和沉积体系特征及其成藏模式研究[J].沉积学报,2007,25(3):386-391.Huang Chuan-yan,Wang Hua,Xiao Dun-qing,et al.Sequence Patterns,Characteristics of DepositionalSystems and Model of Reservoirs of Fault Steep SlopeBelt of the First Member of Shahejie Formation inBanqiao Sag[J].Acta Sedimentologica Sinica,2007,25(3):386-391.
[15]冯有良,徐秀生.同沉积构造坡折带对岩性油气藏富集带的控制作用:以渤海湾盆地古近系为例[J].石油勘探与开发,2006,33(1):22-30.Feng You-liang,Xu Xiu-sheng.SyndepositionalStructural Slope-Break Zone Controls on LithologicReservoirs:A Case from Paleogene Bohai Bay Basin[J].Petroleum Exploration and Development,2006,33(1):22-30.
[16]赵忠新,王华,陆永潮.断坡带对沉积体系的控制作用:以琼东南盆地为例[J].石油勘探与开发,2003,30(1):25-27.Zhao Zhong-xin,Wang Hua,Lu Yong-chao.Controlling Role of Fault-Break Zones on SedimentarySystem:Taking Qiongdongnan Basin as an Example[J].Petroleum Exploration and Development,2003,30(1):25-27.
[2]侯启军,冯子辉,霍秋立.海拉尔盆地乌尔逊凹陷石油运移模式与成藏期[J].地球科学:中国地质大学学报,2004,29(4):397-403.Hou Qi-jun,Feng Zi-hui,Huo Qiu-li.Oil MigrationModel and Entrapment Epoch of North WuerxunDepression in Hailaer Basin[J].Earth Science:Journalof China University of Geosciences,2004,29(4):397-403.
[3]张吉光,彭威,王志国.海拉尔盆地断陷比较评价与勘探方向[J].中国石油勘探,2007,6(4):6-13.Zhang Ji-guang,Peng Wei,Wang Zhi-guo.ComparativeEvaluation and Exploration Orientation of FaultDepressions in Hailaer Basin[J].China PetroleumExploration,2007,6(4):6-13.
[4]陈均亮,吴河勇,朱德丰,等.海拉尔盆地构造演化及油气勘探前景[J].地质科学,2007,42(1):147-159.Chen Jun-liang,Wu He-yong,Zhu De-feng,et al.Tectonic Evolution of the Hailar Basin and ItsPotentials of Oil-Gas Exploration[J].Chinese Journalof Geology,2007,42(1):147-159.
[5]刘志宏,万传彪,任延广,等.海拉尔盆地乌尔逊-贝尔凹陷的地质特征及油气成藏规律[J].吉林大学学报:地球科学版,2006,36(4):527-534.Liu Zhi-hong,Wan Chuan-biao,Ren Yan-guang,et al.Geological Features and the Rule of Oil and GasAccumulation of Urxun-Beier Depression in HailaerBasin[J].Journal of Jilin University:Earth ScienceEdition,2006,36(4):527-534.
[6]曹瑞成,李军辉,卢双舫,等.海拉尔盆地呼和湖凹陷白垩系层序地层特征及沉积演化[J].吉林大学学报:地球科学版,2010,40(3):535-541.Cao Rui-cheng,Li Jun-hui,Lu Shuang-fang,et al.Sequence Stratigraphic Character and SedimentaryEvolution in Cretaceous in Huhehu Depression inHailaer Basin[J].Journal of Jilin University:EarthScience Edition,2010,40(3):535-541.
[7]朱筱敏,董艳蕾,杨俊生,等.辽东湾地区古近系层序地层格架与沉积体系分布[J].中国科学:D辑,2008,38(增刊1):1-10.Zhu Xiao-min,Dong Yan-lei,Yang Jun-sheng,et al.Sequence Stratigraphic Framework and SedimentarySystem Distribution in Paleogene in Liaodong Bay[J].Science in China:Series D,2008,38(Sup.1):1-10.
[8]Brown L F Jr,Loucks R G,Trevino R H,et al.Site-Specific Sequence-Stratigraphic Section BenchmarkCharts Are Key to Regional ChronostratigraphicSystems Tracts Analysis in Growth-Faulted Basins[J].AAPG Bull:Methods in Exploration Series,2005(6):715-724.
[9]侯艳平,朱德丰,任延广,等.贝尔凹陷构造演化及其对沉积和油气的控制作用[J].大地构造与成矿学,2008,32(3):300-307.Hou Yan-ping,Zhu De-feng,Ren Yan-guang,et al.Tectonic Evolution and Its Controlling onSedimentation and Hydrocarbon Accumulation in BeirDepression[J].Geotectonica et Metallogenia,2008,32(3):300-307.
[10]任建业,陆永潮,张青林.断陷盆地构造坡折带形成机制及其对层序发育样式的控制[J].地球科学:中国地质大学学报,2004,29(5):596-602.Ren Jian-ye,Lu Yong-chao,Zhang Qing-lin.Formingmechanim of Structural Slope-Break and Its Controlon Sequence Style in Faulted Basin[J].EarthScience:Journal of China University of Geosciences,2004,29(5):596-602.
[11]黄传炎,王华,高嘉瑞,等.北塘凹陷古近系构造演化及其对层序充填样式的控制[J].中国石油大学学报:自然科学版,2008,32(3):7-13.Huang Chuan-yan,Wang Hua,Gao Jia-rui,et al.Tectonic Evolution and Its Controlling Over SequenceFilling Pattern of Paleogene in Beitang Sag[J].Journal of China University of Petroleum:Edition ofNatural Science,2008,32(3):7-13.
[12]Lin C S,Yang Q,Li S T.Structural and DepositionalPatterns of the Tertiary Baise Basin,GuangxiAutonomous Region(Southeastern China):APredictive Model for Fossil Fuel Exploration[C]//Anadon P,Cabrera L,Kelts K,et al.Lacustrine FaciesAnalysis.Blackwell:Spec Publs Int Ass Sediment,1991:75-92.
[13]林畅松,潘元林,肖建新,等.“坡折带”:断陷盆地层序分析和油气预测的重要概念[J].地球科学:中国地质大学学报,2000,25(3):260-266.Lin Chang-song,Pan Yuan-lin,Xiao Jian-xin,et al.Structural Slope-Break Zone:Key Concept forStratigraphic Sequence Analysis and Petroleum forPredicting in Fault Subsidence Basins[J].EarthScience:Journal of China University of Geosciences,2000,25(3):260-266.
[14]黄传炎,王华,肖敦清,等.板桥凹陷断裂陡坡带沙一段层序样式和沉积体系特征及其成藏模式研究[J].沉积学报,2007,25(3):386-391.Huang Chuan-yan,Wang Hua,Xiao Dun-qing,et al.Sequence Patterns,Characteristics of DepositionalSystems and Model of Reservoirs of Fault Steep SlopeBelt of the First Member of Shahejie Formation inBanqiao Sag[J].Acta Sedimentologica Sinica,2007,25(3):386-391.
[15]冯有良,徐秀生.同沉积构造坡折带对岩性油气藏富集带的控制作用:以渤海湾盆地古近系为例[J].石油勘探与开发,2006,33(1):22-30.Feng You-liang,Xu Xiu-sheng.SyndepositionalStructural Slope-Break Zone Controls on LithologicReservoirs:A Case from Paleogene Bohai Bay Basin[J].Petroleum Exploration and Development,2006,33(1):22-30.
[16]赵忠新,王华,陆永潮.断坡带对沉积体系的控制作用:以琼东南盆地为例[J].石油勘探与开发,2003,30(1):25-27.Zhao Zhong-xin,Wang Hua,Lu Yong-chao.Controlling Role of Fault-Break Zones on SedimentarySystem:Taking Qiongdongnan Basin as an Example[J].Petroleum Exploration and Development,2003,30(1):25-27.
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