东营凹陷沙四段上亚段—沙三段下亚段泥页岩成岩演化及其对储层发育的影响
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摘要
为了明确泥页岩的成岩作用类型及其对储层发育的影响,以东营凹陷沙四段上亚段—沙三段下亚段为研究对象,通过岩心观察、岩石薄片观察、扫描电镜观察、能谱分析、X射线衍射分析和元素分析,对其成岩作用类型进行研究;结合有机质的镜质组反射率、岩石热解和伊/蒙混层比等分析,划分成岩阶段,厘定成岩演化序列;最终明确成岩作用对储集空间发育的影响。研究结果表明,东营凹陷沙四段上亚段—沙三段下亚段泥页岩发育有黄铁矿形成、白云石化作用、压实作用、胶结作用、溶蚀作用、重结晶作用、黏土矿物转化和破裂作用等成岩作用类型。成岩演化已到达中成岩阶段A期。黄铁矿形成、白云石化作用、重结晶作用和黏土矿物转化有利于晶间孔的形成,溶蚀作用有利于形成粒内孔,破裂作用可以形成裂缝。
In order to clarify the diagenetic types of shale and their effects on shale reservoir development,the shale of Upper Es_4 to Lower Es_3 Members in Dongying Sag is taken as the research object. The diagenetic type was studied through core and thin section observation,SEM,EDS,XRD,and elemental analysis. The diagenetic stages were divided in combination with analyses on vitrinite reflectance,rock pyrolysis and I/S mixed-layer ratio. Meanwhile,the diagenetic evolution characteristics were also determined and the effects of diagenesis on the spatial development of reservoirs were clarified.The results show that the diagenesis types of the shale of Upper Es_4 to Lower Es_3 Members in Dongying Sag include formation of pyrite,dolomitization,compaction,cementation,dissolution,recrystallization,clay mineral transformation and rupturing,etc. The diagenetic evolution had been in the middle diagenetic stage A. The formation of pyrite,dolomitization,recrystallization,clay mineral transformation are beneficial to the formation of intercrystalline pores,dissolution is favorable for the formation of grain inner pores,and rupturing can form fractures.
In order to clarify the diagenetic types of shale and their effects on shale reservoir development,the shale of Upper Es_4 to Lower Es_3 Members in Dongying Sag is taken as the research object. The diagenetic type was studied through core and thin section observation,SEM,EDS,XRD,and elemental analysis. The diagenetic stages were divided in combination with analyses on vitrinite reflectance,rock pyrolysis and I/S mixed-layer ratio. Meanwhile,the diagenetic evolution characteristics were also determined and the effects of diagenesis on the spatial development of reservoirs were clarified.The results show that the diagenesis types of the shale of Upper Es_4 to Lower Es_3 Members in Dongying Sag include formation of pyrite,dolomitization,compaction,cementation,dissolution,recrystallization,clay mineral transformation and rupturing,etc. The diagenetic evolution had been in the middle diagenetic stage A. The formation of pyrite,dolomitization,recrystallization,clay mineral transformation are beneficial to the formation of intercrystalline pores,dissolution is favorable for the formation of grain inner pores,and rupturing can form fractures.
引文
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[2]张顺,陈世悦,鄢继华,等.东营凹陷西部沙三下亚段-沙四上亚段泥页岩岩相及储层特征[J].天然气地球科学,2015,26(2):320-332.ZHANG Shun,CHEN Shiyue,YAN Jihua,et al.Characteristics of shale lithofacies and reservoir space in the 3rdand 4thmembers of Shahejie Formation,the west of Dongying sag[J].Natural Gas Geoscience,2015,26(2):320-332.
[3]宋国奇,徐兴友,李政,等.济阳坳陷古近系陆相页岩油产量的影响因素[J].石油与天然气地质,2015,36(3):463-471.SONG Guoqi,XU Xingyou,LI Zheng,et al.Factors controlling oil production from Paleogene shale in Jiyang depression[J].Oil&Gas Geology,2015,36(3):463-471.
[4]刘惠民,孙善勇,操应长,等.东营凹陷沙三段下亚段细粒沉积岩岩相特征及其分布模式[J].油气地质与采收率,2017,24(1):1-10.LIU Huimin,SUN Shanyong,CAO Yingchang,et al.Lithofacies characteristics and distribution model of fine-grained sedimentary rock in the lower Es3member,Dongying sag[J].Petroleum Geology and Recovery Efficiency,2017,24(1):1-10.
[5]杨万芹,蒋有录,王勇.东营凹陷沙三下-沙四上亚段泥页岩岩相沉积环境分析[J].中国石油大学学报:自然科学版,2015,39(4):19-26.YANG Wanqin,JIANG Youlu,WANG Yong.Study on shale facies sedimentary environment of lower Es3-upper Es4in Dongying sag[J].Jouranl of China University of Petroleum:Edition of Natural Science,2015,39(4):19-26.
[6]王苗,陆建林,左宗鑫,等.纹层状细粒沉积岩特征及主控因素分析--以渤海湾盆地东营凹陷沙四上-沙三下亚段为例[J].石油实验地质,2018,40(4):470-478.WANG Miao,LU Jianlin,ZUO Zongxin,et al.Characteristics and dominating factors of lamellar fine-grained sedimentary rocks:Acase study of the upper Es4member-lower Es3member,Dongying sag,Bohai Bay Basin[J].Petroleum Geology&Experiment,2018,40(4):470-478.
[7]刘庆.东营凹陷樊页1井沙河街组烃源岩元素地球化学特征及其地质意义[J].油气地质与采收率,2017,24(5):40-45,52.LIU Qing.Element geochemical characteristics of source rocks in the Shahejie Formation in Well Fanye-1,Dongying sag and their geological significance[J].Petroleum Geology and Recovery Efficiency,2017,24(5):40-45,52.
[8]朱光有,金强,张水昌,等.烃源岩非均质性的控制因素研究--以东营凹陷为例[J].矿物岩石,2003,23(4):95-100.ZHU Guangyou,JIN Qiang,ZHANG Shuichang,et al.Forming mechanisms and heterogeneity of source rock-a case study in Donging depression[J].Journal of Mineralogy and Petrology,2003,23(4):95-100.
[9]孙焕泉.济阳坳陷页岩油勘探实践与认识[J].中国石油勘探,2017,22(4):1-14.SUN Huanquan.Exploration practice and cognitions of shale oil in Jiyang depression[J].China Petroleum Exploration,2017,22(4):1-14.
[10]赵勇.东营凹陷北带构造-层序-成藏动力学研究[M].北京:石油工业出版社,2006:1-2.ZHAO Yong.Study on tectonic-sequence and accumulation dynamics of the northern belt in Dongying Sag[M].Beijing:Petroleum Industry Press,2006:1-2.
[11]杨雪英.华南泥盆纪地层与化石中的莓状黄铁矿研究[D].武汉:中国地质大学,2013:1-63.YANG Xueying.The study of pyrite framboids in the Devonian strata and fossils,South China[D].Wuhan:China University of Geosciences,2013:1-63.
[12]李丕龙.陆相断陷盆地构造演化与构造样式[M].北京:石油工业出版社,2003:36-56.LI Pilong.Tectonic evolution and structural style of continental fault depression basin[M].Beijing:Petroleum Industry Press,2003:36-56.
[13]GEBELEIN C,HOFFMAN P.Algal origin of dolomite laminations in stromatolitic limestone[J].Journal of Sedimentary Research,1973,43(3):603-613.
[14]黄成刚,袁剑英,田光荣,等.柴西地区始新统湖相白云岩储层地球化学特征及形成机理[J].地学前缘,2016,23(3):230-242.HUANG Chenggang,YUAN Jianying,TIAN Guangrong,et al.The geochemical characteristics and formation mechanism of the Eocene lacustrine dolomite reservoirs in the Western Qaidam[J].Earth Science Frontiers,2016,23(3):230-242.
[15]李得立,谭先锋,夏敏全,等.东营凹陷沙四段湖相白云岩沉积特征及成因[J].断块油气田,2010,17(4):418-422.LI Deli,TAN Xianfeng,XIA Minquan,et al.Sedimentary characteristics and genesis of lacustrine dolomite in the fourth member of Shahejie Formation in Dongying Sag[J].Fault-Block Oil&Gas Field,2010,17(4):418-422.
[16]王冠民,钟建华.湖泊纹层的沉积机理研究评述与展望[J].岩石矿物学杂志,2004,23(1):43-48.WANG Guanmin,ZHONG Jianhua.A review and the prospects of the researches on sedimentary mechanism of lacustrine laminae[J].Acta Petrologica et Mineralogica,2004,23(1):43-48.
[17]邱正松,王在明,胡红福,等.纳米碳酸钙抗团聚机理及分散规律实验研究[J].石油学报,2008,29(1):124-127,131.QIU Zhengsong,WANG Zaiming,HU Hongfu,et al.Laboratory research on the resistance to reunion mechanism and dispersed regular pattern for nanometer calcium carbonate[J].Acta Petrolei Sinica,2008,29(1):124-127,131.
[18]SCHIEBER J,SOUTHARD J B,KISSLING P.Experimental deposition of carbonate mud from moving suspensions:importance of flocculation and implications for modern and ancient carbonate mud deposition[J].Journal of Sedimentary Research,2013,83(11):1 025-1 031.
[19]赵亚溥.表面与界面物理力学[M].北京:科学出版社,2012:40-83.ZHAO Yapu.Physical mechanics of surfaces and interfaces[M].Beijing:Science Press,2012:40-83.
[20]赵杏媛,何东博.黏土矿物与油气勘探开发[M].北京:石油工业出版社,2016:1-3.ZHAO Xingyuan,HE Dongbo.Clay minerals and oil and gas exploration and development[M].Beijing:Petroleum Industry Press,2016:1-3.
[21]赵福麟.油田化学[M].东营:中国石油大学出版社,2010:1-15.ZHAO Fulin.Oil field chemistry[M].Dongying:China University of Petroleum Press,2010:1-15.
[22]赵振国.吸附作用应用原理[M].北京:化学工业出版社,2005:314-453.ZHAO Zhenguo.Application principle of adsorption[M].Beijing:Chemical Industry Press,2005:314-453.
[23]ANDRESEN B,BARTH T,IRWIN H.Yields and carbon isotopic composition of pyrolysis products from artificial maturation processes[J].Chemical Geology,1993,106(1/2):103-119.
[24]MORSE J W,MACKENZIE F T.Geochemistry of sedimentary carbonates[M].New York:Elsevier,1991:225.
[25]张志忠,徐志刚.长江口悬沙及其运移[J].海洋科学,1983,7(5):6-11.ZHANG Zhizhong,XU Zhigang.Suspended sediments and its transport in the area of Changjiang River estruary[J].Marine Sciences,1983,7(5):6-11.
[26]THOMAS A R,MURRAY H H.Clay mineral segregation by flocculation in the Porters Creek Formation[J].Clays&Clay Minerals,1989,37(2):179-184.
[27]王勇,王学军,宋国奇,等.渤海湾盆地济阳坳陷泥页岩岩相与页岩油富集关系[J].石油勘探与开发,2016,43(5):696-704.WANG Yong,WANG Xuejun,SONG Guoqi,et al.Genetic connection between mud shale lithofacies and shale oil enrichment in Jiyang Depression,Bohai Bay Basin[J].Petroleum Exploration and Development,2016,43(5):696-704.
[28]应凤祥,罗平,何东博,等.中国含油气盆地碎屑岩储集层成岩作用与成岩数值模拟[M].北京:石油工业出版社,2004:47-90.YING Fengxiang,LUO Ping,HE Dongbo,et al.Diagenesis and diagenetic numerical simulation of clastic rock reservoirs in petroliferous basins of China[M].Beijing:Petroleum Industry Press,2004:47-90.
[29]应凤祥,何东博,龙玉梅,等.碎屑岩成岩阶段划分:SY/T5477-2003[S].北京:石油工业出版社,2003.YING Fengxiang,HE Dongbo,LONG Yumei,et al.The division of diagenesis stages in clastic rocks:SY/T5477-2003[S].Beijing:Petroleum Industry Press,2003.
[30]黄思静.碳酸盐岩的成岩作用[M].北京:地质出版社,2010:1-2.HUANG Sijing.Diagenesis of carbonate rocks[M].Beijing:Geological Publishing House,2010:1-2.
[31]张顺,刘惠民,宋国奇,等.东营凹陷页岩油储集空间成因及控制因素[J].石油学报,2016,37(12):1 495-1507,1 527.ZHANG Shun,LIU Huimin,SONG Guoqi,et al.Genesis and control factors of shale oil reserving space in Dongying sag[J].Acta Petrolei Sinica,2016,37(12):1 495-1507,1 527.