济阳坳陷页岩油储层物质组分对含油性的控制规律
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摘要
借助岩石学和地球化学分析手段,对济阳坳陷沙四段上亚段和沙三段下亚段页岩油储层进行原油赋存状态和物质组分分析。荧光特征分析结果表明:束缚型和游离型沥青分别选择性赋存于泥质纹层、碳酸盐纹层和裂缝内,泥质纹层作为生油的母质仓储,易于富集炭质沥青和沥青质沥青;碳酸盐纹层相对于泥质纹层具有更优越的储集空间,易于富集胶质沥青和油质沥青,更易流动的油质沥青则汇集到裂缝内。研究发现,方解石脉本质上是一种接近于完全充填的裂缝表现形式,总结出4个亮晶方解石脉体的识别标志,其中轴愈合线附近的方解石晶间孔和未愈合缝可以作为油质沥青的运移通道。页岩油储集空间的发育主要受控于岩石结构与构造及物质组分,矿物组分差异和有机质热演化是页岩油储集空间和含油性的2个主要影响因素。受此影响,泥页岩储集性表现为:(1)纹层状泥页岩储层具有高孔隙度;(2)碳酸盐含量高的泥页岩储层具有高孔隙度;(3)高有机质热演化程度的泥页岩储层具有高孔隙度。
By means of petrology and geochemical analysis,the oil-bearing properties and material components of shale oil reservoirs in Upper Es4 and Lower Es3 Members in Jiyang Depression were analyzed. Fluorescence characteristics analysis results show that the resident and free asphaltene selectively occur in argillaceous laminates,gray carbonate laminates and fractures. Argillaceous lamina,as the parent material storage for oil-generated,is easy to enrich carbon asphaltene and bituminiferous asphaltene. Carbonate laminates have superior storage space compared with argillaceous laminates,which are suitable to accumulate gum asphaltene and crude oil asphaltene,and crude oil asphaltene can easily flow into microcracks. It is found that the calcite vein is essentially a kind of fully filled fracture. Four identification marks of recognition calcite vein are summarized,among which the calcite intercrystalline pore and the non healing crack near the shaft healing line can be regarded as the percolation path for the oil asphaltene. The spatial development and oil content of shale oil reservoir are mainly controlled by the rock texture,structure types and material components. Mineral composition differences and thermal evolution of organic matter are two main factors that influence shale oil storage space and oil content. As a result,the storage of shale oil has following characteristics:shale with argillaceous laminates and gray carbonate laminates has high porosity,shale with high carbonate content has high porosity,and the higher thermal evolution degree of organic matter corresponds to the higher porosity.
By means of petrology and geochemical analysis,the oil-bearing properties and material components of shale oil reservoirs in Upper Es4 and Lower Es3 Members in Jiyang Depression were analyzed. Fluorescence characteristics analysis results show that the resident and free asphaltene selectively occur in argillaceous laminates,gray carbonate laminates and fractures. Argillaceous lamina,as the parent material storage for oil-generated,is easy to enrich carbon asphaltene and bituminiferous asphaltene. Carbonate laminates have superior storage space compared with argillaceous laminates,which are suitable to accumulate gum asphaltene and crude oil asphaltene,and crude oil asphaltene can easily flow into microcracks. It is found that the calcite vein is essentially a kind of fully filled fracture. Four identification marks of recognition calcite vein are summarized,among which the calcite intercrystalline pore and the non healing crack near the shaft healing line can be regarded as the percolation path for the oil asphaltene. The spatial development and oil content of shale oil reservoir are mainly controlled by the rock texture,structure types and material components. Mineral composition differences and thermal evolution of organic matter are two main factors that influence shale oil storage space and oil content. As a result,the storage of shale oil has following characteristics:shale with argillaceous laminates and gray carbonate laminates has high porosity,shale with high carbonate content has high porosity,and the higher thermal evolution degree of organic matter corresponds to the higher porosity.
引文
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[15]朱日房,张林晔,李钜源,等.渤海湾盆地东营凹陷泥页岩有机储集空间研究[J].石油实验地质,2012,34(4):352-356.ZHU Rifang,ZHANG Linye,LI Juyuan,et al.Organic matter reservoir space of shale in Dongying Sag,Bohai Bay Basin[J].Petroleum Geology&Experiment,2012,34(4):352-356.
[16]黄睿哲,姜振学,高之业,等.页岩储层组构特征对自发渗吸的影响[J].油气地质与采收率,2017,24(1):111-115.HUANG Ruizhe,JIANG Zhenxue,GAO Zhiye,et al.Effect of composition and structural characteristics on spontaneous imbibition of shale reservoir[J].Petroleum Geology and Recovery Efficiency,2017,24(1):111-115.
[17]张爽,隋微波.页岩储层有机质分布定量分析及重构模型[J].油气地质与采收率,2016,23(2):22-28.ZHANG Shuang,SUI Weibo.Reconstruction and quantitative analysis methods for organic matter distribution in shale reservoirs[J].Petroleum Geology and Recovery Efficiency,2016,23(2):22-28.
[18]沈英,孙玉善,李莉,等.岩石荧光薄片鉴定:SY/T 5614-2011[S].北京:石油工业出版社,2011.SHEN Ying,SUN Yushan,LI Li,et al.Thin section examination for fluorescence characteristics:SY/T 5614-2011[S].Beijing:Petroleum Industry Press,2011.
[19]滕建彬.东营凹陷利页1井泥页岩中白云石成因及层序界面意义[J].油气地质与采收率,2018,25(2):1-7,36.TENG Jianbin.Genesis of dolomite in shale drilled by Well Liye1in Dongying Sag and its significance on sequence boundary indication[J].Petroleum Geology and Recovery Efficiency,2018,25(2):1-7,36.
[20]WHITAKER F F,XIAO Y T.Reactive transport modeling of early burial dolomitization of carbonate platforms by geothermal convection[J].AAPG Bulletin,2010,94(6):889-917.
[21]滕建彬.流体-岩石化学作用控制的成岩相划分与评价--以江家店-瓦屋地区沙三段下亚段为例[J].油气地质与采收率,2017,24(3):1-9.TENG Jianbin.Division and evaluation of diagenetic facies of reservoirs in the control of fluid-rock chemical interaction:A case study of the lower Es3in Jiangjiadian-Wawu area[J].Petroleum Geology and Recovery Efficiency,2017,24(3):1-9.
[22]SUN Chao,YAO Suping,LI Jinning,et al.Characteristics of pore structure and effectiveness of shale oil reservoir space in Dongying Sag,Jiyang Depression,Bohai Bay Basin[J].Journal of Nanoscience and Nanotechnology,2017,17:6 781-6 790.
[2]CHALMERS G R L,ROSS D J K,BUSTIN R M.Geological controls on matrix permeability of Devonian gas shales in the Horn River and Liard basins,northeastern British Columbia,Canada[J].International Journal of Coal Geology,2012,103(23):120-131.
[3]CHALMERS G R,BUSTIN R M,POWER I M.Characterization of gas shale pore systems by porosimetry,pycnometry,surface area,and field emission scanning electron microscopy/transmission electron microscopy image analyses:Examples from the Barnett,Woodford,Haynesville,Marcellus,and Doig unit[J].AAPG Bulletin,2012,96(6):1 099-1 119.
[4]端祥刚,高树生,胡志明,等.页岩微纳米孔隙多尺度渗流理论研究进展[J].特种油气藏,2017,24(5):1-9.DUAN Xianggang,GAO Shusheng,HU Zhiming,et al.Research progress in multi-scale percolation theory in shale micro-nano pores[J].Special Oil&Gas Reservoirs,2017,24(5):1-9.
[5]黄璞,姜振学,程礼军,等.川东北牛蹄塘组页岩孔隙结构特征及其控制因素[J].大庆石油地质与开发,2016,35(5):156-162.HUANG Pu,JIANG Zhenxue,CHENG Lijun,et al.Pore structural characteristics and their controlling factors of Niutitang-Formation shale in Northeast Sichuan Basin[J].Petroleum Geology&Oilfield Development in Daqing,2016,35(5):156-162.
[6]朱梦月,秦启荣,李虎,等.川东南DS地区龙马溪组页岩裂缝发育特征及主控因素[J].油气地质与采收率,2017,24(6):54-59.ZHU Mengyue,QIN Qirong,LI Hu,et al.Development characteristics and controlling factors of shale fractures in the Longmaxi Formation in DS area,southeast Sichuan[J].Petroleum Geology and Recovery Efficiency,2017,24(6):54-59.
[7]王超,石万忠,张晓明,等.页岩储层裂缝系统综合评价及其对页岩气渗流和聚集的影响[J].油气地质与采收率,2017,24(1):50-56.WANG Chao,SHI Wanzhong,ZHANG Xiaoming,et al.Comprehensive evaluation of fracture system in shale reservoir and its influence on shale gas seepage and accumulation[J].Petroleum Geology and Recovery Efficiency,2017,24(1):50-56.
[8]王永诗,李政,巩建强,等.济阳坳陷页岩油气评价方法--以沾化凹陷罗家地区为例[J].石油学报,2013,34(1):83-91.WANG Yongshi,LI Zheng,GONG Jianqiang,et al.Discussion on an evaluation method of shale oil and gas in Jiyang depression:a case study on Luojia area in Zhanhua sag[J].Acta Petrolei Sinica,2013,34(1):83-91.
[9]刘毅,陆正元,戚明辉,等.渤海湾盆地沾化凹陷沙河街组页岩油微观储集特征[J].石油实验地质,2017,39(2):180-185,194.LIU Yi,LU Zhengyuan,QI Minghui,et al.Microscopic characteristics of shale oil reservoirs in Shahejie Formation in Zhanhua Sag,Bohai Bay Basin[J].Petroleum Geology&Experiment,2017,39(2):180-185,194.
[10]朱光有,金强,张水昌,等.济阳坳陷东营凹陷古近系沙河街组深湖相油页岩的特征及成因[J].古地理学报,2005,7(1):59-69.ZHU Guangyou,JIN Qiang,ZHANG Shuichang,et al.Characteristics and origin of deep lake oil shale of the Shahejie Formation of Paleogene in Dongying Sag,Jiyang Depression[J].Journal of Palaeogeography,2005,7(1):59-69.
[11]朱德燕,王学军,郝雪峰,等.东营凹陷泥页岩层序地层划分[J].油气地质与采收率,2016,23(2):52-56.ZHU Deyan,WANG Xuejun,HAO Xuefeng,et al.Study on sequence stratigraphic division of oil shale in Dongying sag[J].Petroleum Geology and Recovery Efficiency,2016,23(2):52-56.
[12]马立民,李志鹏,林承焰,等.东营凹陷沙四下盐湖相沉积序列[J].中国石油大学学报:自然科学版,2014,38(6):24-31.MA Limin,LI Zhipeng,LIN Chengyan,et al.Sedimentary sequences of salt-lake facies in Lower Es4of Dongying Depression[J].Journal of China University of Petroleum:Edition of Natural Science,2014,38(6):24-31.
[13]朱光有,金强.烃源岩的非均质性研究--以东营凹陷牛38井为例[J].石油学报,2002,23(5):34-39.ZHU Guangyou,JIN Qiang.Study on source rock heterogeneity-Acase of Niu-38 well in Dongying Depression[J].Acta Petrolei Sinica,2002,23(5):34-39.
[14]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.
[15]朱日房,张林晔,李钜源,等.渤海湾盆地东营凹陷泥页岩有机储集空间研究[J].石油实验地质,2012,34(4):352-356.ZHU Rifang,ZHANG Linye,LI Juyuan,et al.Organic matter reservoir space of shale in Dongying Sag,Bohai Bay Basin[J].Petroleum Geology&Experiment,2012,34(4):352-356.
[16]黄睿哲,姜振学,高之业,等.页岩储层组构特征对自发渗吸的影响[J].油气地质与采收率,2017,24(1):111-115.HUANG Ruizhe,JIANG Zhenxue,GAO Zhiye,et al.Effect of composition and structural characteristics on spontaneous imbibition of shale reservoir[J].Petroleum Geology and Recovery Efficiency,2017,24(1):111-115.
[17]张爽,隋微波.页岩储层有机质分布定量分析及重构模型[J].油气地质与采收率,2016,23(2):22-28.ZHANG Shuang,SUI Weibo.Reconstruction and quantitative analysis methods for organic matter distribution in shale reservoirs[J].Petroleum Geology and Recovery Efficiency,2016,23(2):22-28.
[18]沈英,孙玉善,李莉,等.岩石荧光薄片鉴定:SY/T 5614-2011[S].北京:石油工业出版社,2011.SHEN Ying,SUN Yushan,LI Li,et al.Thin section examination for fluorescence characteristics:SY/T 5614-2011[S].Beijing:Petroleum Industry Press,2011.
[19]滕建彬.东营凹陷利页1井泥页岩中白云石成因及层序界面意义[J].油气地质与采收率,2018,25(2):1-7,36.TENG Jianbin.Genesis of dolomite in shale drilled by Well Liye1in Dongying Sag and its significance on sequence boundary indication[J].Petroleum Geology and Recovery Efficiency,2018,25(2):1-7,36.
[20]WHITAKER F F,XIAO Y T.Reactive transport modeling of early burial dolomitization of carbonate platforms by geothermal convection[J].AAPG Bulletin,2010,94(6):889-917.
[21]滕建彬.流体-岩石化学作用控制的成岩相划分与评价--以江家店-瓦屋地区沙三段下亚段为例[J].油气地质与采收率,2017,24(3):1-9.TENG Jianbin.Division and evaluation of diagenetic facies of reservoirs in the control of fluid-rock chemical interaction:A case study of the lower Es3in Jiangjiadian-Wawu area[J].Petroleum Geology and Recovery Efficiency,2017,24(3):1-9.
[22]SUN Chao,YAO Suping,LI Jinning,et al.Characteristics of pore structure and effectiveness of shale oil reservoir space in Dongying Sag,Jiyang Depression,Bohai Bay Basin[J].Journal of Nanoscience and Nanotechnology,2017,17:6 781-6 790.