冯子辉,霍秋立,曾花森,王义章,贾艳双
FENG Zihui,HUO Qiuli,ZENG Huasen,WANG Yizhang,JIA Yanshuang

• 1:大庆油田有限责任公司勘探开发研究院
• 2:黑龙江省陆相页岩油重点实验室

摘要(Abstract)：

有机质孔是页岩储层重要的孔隙类型,是页岩油气富集的关键要素,其形成演化与有机质组成及生烃演化密切相关。针对古龙页岩有机质孔的发育特征及形成演化,开展地球化学分析、生排烃模拟实验、单一显微组分生烃模拟实验、微观孔隙分析等,研究古龙页岩与海相页岩有机质组成的差异,探讨古龙页岩有机质组成与有机质孔形成演化的关系。结果表明:古龙页岩有机质组成主要为层状藻类体,在不同沉积相带中比例大于50%,平均为58%,陆源高等植物来源的有机质相对较少,在深湖相区的比例平均小于10%;层状藻类体生烃转化率高,完全生烃后面积收缩率超85%,形成沿层分布的纳米级、细长条形孔(缝),是高成熟度古龙页岩孔隙的重要来源,这种孔(缝)在产状上属于黏土层间或矿物晶间孔(缝),从成因上属于有机质孔;藻类体与黏土结合的部位在有机质生烃后往往形成网状孔,孔隙骨架为残余有机质与黏土复合体。研究成果为古龙页岩成烃、成储机制研究提供重要的理论技术支撑。
As an important pore type in shale reservoirs, organic pores are critical for shale oil and gas enrichment, and their formation and evolution is closely related to organic matter compositions and hydrocarbon generation. In order to understand development characteristics, formation and evolution of organic pores in Gulong shale, organic geochemistry analyses, hydrocarbon generation pyrolysis experiments with both whole rock and individual maceral, pore characterization by FE-SEM are performed to study difference of organic matter compositions between Gulong shale and marine shale and to explore relationship between organic matter compositions and organic pore formation and evolution of Gulong shale. The results show that organic matter in Gulong shale is dominated by lamalginite with the percentage over 50% and averagly 58% in different sedimentary facies. Terrestrial organic matters are relatively less with the average percentage in deep-lake facies less than 10%.Lamalginite has higher hydrocarbon generation potential, with the surface area shrinking over 85% after complete hydrocarbon generation. The formed bedding-parallel nano-scale slender pores(fractures) are important sources for Gulong shale pores at high maturity. These pores(fractures) are clay interlayer or mineral intercrystalline pores(fractures) in occurrences, but from the view of origin, they belong to organic pores.The pores developed in transitional part between lamalginite and clay are usually spongy and the pore skeleton are the complexes of organic matter and clay. The study results provide important theoretical and technological supports for the research on hydrocarbon generating and accumulating mechanisms of Gulong shale.

关键词(KeyWords)： 层状藻类体;有机质孔;热模拟实验;显微组分;古龙页岩;松辽盆地
lamalginite;organic pore;pyrolysis experiment;maceral;Gulong shale;Songliao Basin

Abstract:

Keywords:

基金项目(Foundation): 中央引导地方科技发展专项“黑龙江省致密油和泥岩油成藏研究重点实验室建设项目”(ZY20B13)

作者(Author): 冯子辉,霍秋立,曾花森,王义章,贾艳双
FENG Zihui,HUO Qiuli,ZENG Huasen,WANG Yizhang,JIA Yanshuang

DOI: 10.19597/J.ISSN.1000-3754.202107012

参考文献(References)：

• [1]LOUCKS R,REED R,RUPPEL S,et al.Morphology,genesis,and distribution of nanometer-scale pores in Siliceous Mudstones of the Mississippian Barnett Shale[J].Journal of Sedimentary Research,2009,79:848-861.
• [2]LOUCKS R G,REED R M,RUPPEL S C,et al.Spectrum of pore types and networks in mudrocks and a descriptive classification for matrix-related mudrock pores[J].AAPG Bulletin,2012,96(6):1071-1098.
• [3]CURTIS M E,CARDOTT B J,SONDERGELD C H,et al.Development of organic porosity in the Woodford Shale with increasing thermal maturity[J].International Journal of Coal Geology,2012,103:26-31.
• [4]MILLIKEN K L,RUDNICKI M,AWWILLER D N,et al.Organic matter-hosted pore system,Marcellus Formation (Devonian),Pennsylvania[J].AAPG Bulletin,2013,97(2):177-200.
• [5]WANG F,GUAN J,FENG W,et al.Evolution of overmature marine shale porosity and implication to the free gas volume[J].Petroleum Exploration and Development,2013,40(6):819-824.
• [6]陈曼霏，何生，易积正，等.涪陵页岩气田平桥区块页岩气储层有机质孔发育特征[J].石油学报，2019,40(4):423-433.CHENG Manfei,HE Sheng,YI Jizheng,et al.Development characteristics of organic pore in shale gas reservoir of Wufeng Formation Member 1 of Longmaxi Formation in Pingqiao block,Fuling shale gas field [J].Acta Petrolei Sinica,2019,40(4):423-433.
• [7]OLSON T.Imaging unconventional reservoir pore systems[M].Tulsa:AAPG,2016.
• [8]PEPPERS R A,HARVEY R D.Distribution of Boghead Algae in Illinois Basin Coal Beds[M].Illinois:Illinois State Geological Survey,1997.
• [9]BERNARD S,WIRTH R,SCHREIBER A,et al.Formation of nanoporous pyrobitumen residues during maturation of the Barnett Shale (Fort Worth Basin)[J].International Journal of Coal Geology,2012,103:3-11.
• [10]魏志红.富有机质页岩有机质孔发育差异性探讨：以四川盆地五峰组—龙马溪组笔石页岩为例[J].成都理工大学学报(自然科学版),2015,42(3):361-365.WEI Zhihong.Difference of organic pores in organic matter:A case from graptolite shales of Wufeng Formation-Longmaxi Formation in Sichuan Basin,China[J].Journal of Chengdu University of Technology (Science & Technology Edition),2015,42(3):361-365.
• [11]ANDREW M.Comparing organic-hosted and intergranular pore networks:topography and topology in grains,gaps and bubbles[M].London:Geological Society of London,2020.
• [12]周昊，陈雷，李雪松，等.川南长宁地区五峰组和龙马溪组页岩储层差异性分析[J].断块油气田，2021,28(3):289-294.ZHOU Hao,CHEN Lei,LI Xuesong et al.Difference analysis of shale reservoirs of Wufeng Formation and Longmaxi Formation in Changning area,southern Sichuan[J].Fault-Block Oil & Gas Field,2021,28(3):289-294.
• [13]POMMER M,MILLIKEN K.Pore types and pore-size distributions across thermal maturity,Eagle Ford Formation,southern Texas[J].AAPG Bulletin,2015,99(9):1713-1744.
• [14]MASTALERZ M,SCHIMMELMANN A,DROBNIAK A,et al.Porosity of Devonian and Mississippian New Albany Shale across a maturation gradient:Insights from organic petrology,gas adsorption,and mercury intrusion[J].AAPG Bulletin,2013,97(10):1621-1643.
• [15]KATZ B J,ARANGO I.Organic porosity:A geochemist’s view of the current state of understanding [J].Organic Geochemistry,2018,123:1-16.
• [16]腾格尔，卢龙飞，俞凌杰，等.页岩有机质孔隙形成、保持及其连通性的控制作用 [J/OL].石油勘探与开发，2021,48(4):1-13[2021-06-07].https://kns.cnki.net/kcms/detail/11.2360.TE.20210604.1356.008.html.TENG Ge’er,LU Longfei,YU Lingjie,et al.Formation,preservation and connectivity control of organic pores in shale[J].Petroleum Exploration and Development,2021,48(4):1-13[2021-06-07].https://kns.cnki.net/kcms/detail/11.2360.TE.20210604.1356.008.html.
• [17]MODICA C J,LAPIERRE S G.Estimation of kerogen porosity in source rocks as a function of thermal transformation:Example from the Mowry Shale in the Powder River Basin of Wyoming[J].AAPG Bulletin,2012,96(1):87-108.
• [18]MISCH D,KLAVER J,GROSS D,et al.Factors controlling shale microstructure and porosity:A case study on upper Visean Rudov beds from the Ukrainian Dneiper-Donets Basin[J].AAPG Bulletin,2018,102(12):2629-2654.
• [19]霍秋立，曾花森，付丽，等.松辽盆地北部青一段泥页岩储层特征及孔隙演化 [J].大庆石油地质与开发，2019,38(1):1-8.HUO Qiuli,ZENG Huasen,FU Li,et al.Accumulating characteristics and pore evolution for Member Qing-1 mud shale in North Songliao Basin[J].Petroleum Geology & Oilfield Development in Daqing,2019,38(1):1-8.
• [20]霍秋立，曾花森，张晓畅，等.松辽盆地古龙页岩有机质特征与页岩油形成演化 [J].大庆石油地质与开发，2020,39(3):86-96.HUO Qiuli,ZENG Huasen,ZHANG Xiaochang,et al.Organic matter characteristics and shale oil formation of Gulong shale in Songliao Basin [J].Petroleum Geology & Oilfield Development in Daqing,2020,39(3):86-96.
• [21]李吉君，史颖琳，黄振凯，等.松辽盆地北部陆相泥页岩孔隙特征及其对页岩油赋存的影响 [J].中国石油大学学报(自然科学版),2015,39(4):27-34.LI Jijun,SHI Yinglin,HUANG Zhenkai,et al.Pore characteristics of continental shale and its impact on storage of shale oil in northern Songliao Basin [J].Journal of China University of Petroleum(Edition of Natural Science) ,2015,39(4):27-34.
• [22]杨万里，高瑞祺，李永康，等.松辽湖盆的生油特征及烃类的演化 [J].石油学报，1980,1(增刊1):29-41.YANG Wanli,GAO Ruiqi,LI Yongkang,et al.Characteristics of oil generation and evolution of hydrocarbons in the Songliao lake basin[J].Acta Petrolei Sinica,1980,1(S1):29-41.
• [23]侯启军，冯志强，冯子辉.松辽盆地陆相石油地质学 [M].北京：石油工业出版社，2009.HOU Qijun,FENG Zhiqiang,FENG Zihui.Terrestrial petroleum geology of Songliao Basin[M].Beijing:Petroleum Industry Press,2009.
• [24]冯子辉，方伟，李振广，等.松辽盆地陆相大规模优质烃源岩沉积环境的地球化学标志 [J].中国科学 D辑：地球科学，2011,41(9):1253-1267.FENG Zihui,FANG Wei,LI Zhenguang,et al.Depositional environment of terrestrial petroleum source rocks and geochemical indicators in the Songliao Basin [J].Science in China:D Earth Science,2011,41(9):1253-1267.
• [25]孙龙德.古龙页岩油(代序) [J].大庆石油地质与开发，2020,39(3):1-7.SUN Longde.Gulong shale oil (preface) [J].Petroleum Geology & Oilfield Development in Daqing,2020,39(3):1-7.
• [26]霍秋立，曾花森，乔万林，等.松辽盆地优质烃源岩含水生排油模拟实验 [J].大庆石油地质与开发，2011,30(2):1-5.HUO Qiuli,ZENG Huasen,QIAO Wanlin,et al.Simulating experiment of hydrous oil generation and expulsion of high-quality source rocks in Songliao Basin [J].Petroleum Geology & Oilfield Development in Daqing,2011,30(2):1-5.
• [27]TAYLOR G H,TEICHMüLLER M,DAVIS C.Organic petrology:A new handbook incorporating some revised parts of stach’s textbook of coal petrology [M].Berlin:Gebruder Borntraeger,1998.
• [28]PICKEL W,KUS J,FLORES D,et al.Classification of liptinite-ICCP system 1994 [J].International Journal of Coal Geology,2017,169:40-61.
• [29]王大锐.油气同位素地球化学 [J].北京：石油工业出版社，2000.WANG Darui.Petroluem isotpe geochemistry [J].Beijing:Petroluem Industry Press,2000.
• [30]MEYERS P A,LALLIER-VERGéS E.Lacustrine sedimentary organic matter records of Late Quaternary Paleoclimates[J].Journal of Paleolimnology,1999,21(3):345-372.
• [31]PHILP R P,GILBERT T D.Biomarker distributions in Australian oils predominantly derived from terrigenous source material[J].Organic Geochemistry,1986,10(1):73-84.
• [32]HUANG W Y,MEINSCHEIN W G.Sterols as ecological indicators[J].Geochimica et Cosmochimica Acta,1979,43(5):739-745.
• [33]MASTALERZ M,SCHIMMELMANN A,LIS G P,et al.Influence of maceral composition on geochemical characteristics of immature shale kerogen:Insight from density fraction analysis [J].International Journal of Coal Geology,2012,103:60-69.
• [34]HACKLEY P C,VALENTINE B J,HATHERIAN J J.On the petrographic distinction of bituminite from solid bitumen in immature to early mature source rocks [J].International Journal of Coal Geology,2018,196:232-245.
• [35]L?HR S C,BARUCH E T,HALL P A,et al.Is organic pore development in gas shales influenced by the primary porosity and structure of thermally immature organic matter[J].Organic Geochemistry,2015,87:119-132.
• [36]CARDOTT B J,LANDIS C R,CURTIS M E.Post-oil solid bitumen network in the Woodford Shale,USA :A potential primary migration pathway [J].International Journal of Coal Geology,2015,139:106-113.
• [37]JARVIE D M,HILL R J,RUBLE T E,et al.Unconventional shale-gas systems:The Mississippian Barnett Shale of north-central Texas as one model for thermogenic shale-gas assessment [J].AAPG Bulletin,2007,91(4):475-499.
• [38]CHEN Z,LI M,MA X,et al.Generation kinetics based method for correcting effects of migrated oil on Rock-Eval data:An example from the Eocene Qianjiang Formation,Jianghan Basin,China [J].International Journal of Coal Geology,2018,195:84-101.
• [39]WEI L,MASTALERZ M,SCHIMMELMANN A,et al.Influence of Soxhlet-extractable bitumen and oil on porosity in thermally maturing organic-rich shales[J].International Journal of Coal Geology,2014,132:38-50.
• [40]CHEN Z,JIANG C.A revised method for organic porosity estimation in shale reservoirs using Rock-Eval data:Example from Duvernay Formation in the Western Canada Sedimentary Basin[J].AAPG Bulletin,2016,100(3):405-422.
• [41]田华，张水昌，柳少波，等.压汞法和气体吸附法研究富有机质页岩孔隙特征 [J].石油学报，2012,33(3):419-427.TIAN Hua,ZHANG Shuichang,LIU Shaobo,et al.Determination of organic-rich shale pore features by mercury injection and gas adsorption methods [J].Acta Petrolei Sinica,2012,33(3):419-427.
• [42]蔡进功，包于进，杨守业，等.泥质沉积物和泥岩中有机质的赋存形式与富集机制 [J].中国科学 D辑：地球科学，2007,37(2):234-43.CAI Jingong,BAO Yujin,YANG Shouye,et al.Organic matter occurrence and enrichment mechanism in muddy sediment and mudstone [J].Science in China:D Earth Science,2007,37(2):234-43.
• [43]WANG G.Deformation of organic matter and its effect on pores in mud rocks [J].AAPG Bulletin,2020,103(1):21-36.
• [44]LIN R,PATRICK R G.Studying individual macerals using i.r.microspectrometry,and implications on oil versus gas/condensate proneness and “low-rank” generation [J].Organic Geochemistry,1993,20(6):695-706.
• [45]LIANG T,ZOU Y R,ZHAN Z W,et al.An evaluation of kerogen molecular structures during artificial maturation [J].Fuel,2020,265:116979.
• [46]HACKLEY P C,CARDOTT B J.Application of organic petrography in North American shale petroleum systems:A review [J].International Journal of Coal Geology,2016,163:8-51.
• [47]SONG L,CARR T R.The pore structural evolution of the Marcellus and Mahantango shales,Appalachian Basin [J].Marine and Petroleum Geology,2020,114:104226.