泥页岩不同介质中可溶有机质组成差异性及对页岩油富集的意义

朱景修

doi:10.11781/sysydz201604429

泥页岩不同介质中可溶有机质组成差异性及对页岩油富集的意义

doi: 10.11781/sysydz201604429

朱景修

中国石化河南油田分公司勘探开发研究院, 河南南阳 473132

基金项目: 中国石化科技部项目"泌阳凹陷陆相页岩油富集主控因素研究"（P13106）资助。

详细信息

作者简介:
朱景修(1973—),男,高级工程师,从事油气勘探地质综合研究及管理工作。E-mail:102527382@QQ.com。

中图分类号: TE122.1
计量
- 文章访问数: 1408
- HTML全文浏览量: 100
- PDF下载量: 1258
- 被引次数: 0
出版历程
- 收稿日期: 2016-04-01
- 修回日期: 2016-06-07
- 刊出日期: 2016-07-28

Composition difference of soluble organic matter in different media in mudstones and its significance for shale oil enrichment

Zhu Jingxiu

Exploration and Development Research Institute of Henan Oilfield Branch Company, SINOPEC, Nanyang, Henan 473132, China

摘要

摘要: 泥页岩中的有机质组成复杂，其差异性对于认识油气的生排烃和页岩油气的形成与富集机理具有重要意义。选择南襄盆地泌阳凹陷始新统核桃园组湖相泥页岩为研究对象，系统对比了其中不同介质（包括无机矿物和有机干酪根）中可溶有机质的组成与差异，并与页岩油和砂岩油相对比，分析差异性，讨论其地质地球化学意义。结果表明，泥页岩不同介质中可溶有机质的饱和烃组成差异性较小，难以区分，反映了页岩油气的源内生排烃过程，饱和烃自身各种化合物之间的极性差异不大；而芳烃组成差异明显，其中，有机介质中可溶有机质的芳烃组成与页岩油/砂岩油相当，而无机介质中可溶有机质的芳烃组成与页岩油/砂岩油差异较大，反映了油气生排烃的过程。据此，泥页岩在初次运移的排烃过程中，生成的烃类物质首先充满无机矿物基质孔隙，并满足矿物颗粒表面吸附后，进入烃源层内微裂缝和/或砂岩夹层而富集，这类油气资源即目前所谓的页岩油。
- 可溶有机质 /
- 排烃 /
- 油气初次运移 /
- 泥页岩 /
- 页岩油 /
- 泌阳凹陷 /
- 南襄盆地
Abstract: The composition of soluble organic matter in mudstones is complex and the study of composition diffe-rence is not only important to understanding hydrocarbon generation and expulsion processes, but also necessary for us to determine shale oil formation and accumulation mechanisms. Lacustrine shale of the Hetaoyuan Formation in the Biyang Sag of Nanxiang Basin was systematically studied to determine the composition difference of soluble organic matter from different media (including inorganic minerals and kerogen). The results were compared with shale oil and sandstone oil, and their geological and geochemical significance discussed. Results show that, it is mainly because of the similar polarity among various compounds of saturated hydrocarbon that we can hardly distinguish the difference of saturated hydrocarbon component of soluble organic matter in different media, which implies shale oil generation and expulsion processes in source rock. However, there are obvious variations of aromatic composition. The aromatic composition of soluble organic matter in organic medium is similar to shale oil/sandstone oil, but the aromatic composition of soluble organic matter in inorganic medium is different from shale oil/sandstone oil, which reflects the processes of hydrocarbon generation and expulsion. Accordingly, in the primary migration in mudstone, the generated hydrocarbons firstly filled inorganic mineral pores, after achieving the adsorption capacity of mineral particles, then entering into the micro-cracks in source rock and/or sandstone interlayer, finally forming oil and gas enrichment, which was the so-called shale oil.
- soluble organic matter /
- hydrocarbon expulsion /
- primary migration /
- shale /
- shale oil /
- Biyang Sag /
- Nanxiang Basin

HTML全文

参考文献(27)

[1]	Tissot B P,Welte D H.Petroleum formation and occurrence[M].2nd ed.Germany:Springer-Verlag,1984.
[2]	Yang Ruofei,Cao Jian,Hu Guang,et al.Organic geochemistry and petrology of Lower Cretaceous black shales in the Qiangtang Basin,Tibet:Implications for hydrocarbon potential[J].Organic Geoche-mistry,2015,86:55-70.
[3]	Katz B,Lin Fang.Lacustrine basin unconventional resource plays:Key differences[J].Marine and Petroleum Geology,2014,56:255-265.
[4]	Bryndzia L T,Braunsdorf N R.From source rock to reservoir:The evolution of self-sourced unconventional resource plays[J].Elements,2014,10(4):271-276.
[5]	Jarvie D M.Shale resource systems for oil and gas:Part 1—Shale-gas resource systems//Breyer J A.Shale reservoirs—Giant resources for the 21st century:AAPG Memoir 97.Tulsa:AAPG,2012:69-87.
[6]	Jarvie D M.Shale resource systems for oil and gas:Part 2—Shale-oil resource systems//Breyer J A.Shale reservoirs—Giant resources for the 21st century:AAPG Memoir 97.Tulsa:AAPG,2012:89-119.
[7]	Badics B,Vetö I.Source rocks and petroleum systems in the Hungarian part of the Pannonian Basin:The potential for shale gas and shale oil plays[J].Marine and Petroleum Geology,2012,31(1):53-69.
[8]	Chen Lei,Lu Yongchao,Jiang Shu,et al.Heterogeneity of the Lower Silurian Longmaxi marine shale in the southeast Sichuan Basin of China[J].Marine and Petroleum Geology,2015,65:232-246.
[9]	Qiu Xinwei,Liu Chiyang,Mao Guangzhou,et al.Major,trace and platinum-group element geochemistry of the Upper Triassic nonmarine hot shales in the Ordos Basin,Central China[J].Applied Geochemistry,2015,53:42-52.
[10]	Wilhelms A,Larter S R,Leythaeuser D,et al.Recognition and quantification of the effects of primary migration in a Jurassic clastic source-rock from the Norwegian continental shelf[J].Organic Geochemistry,1990,16(13):103-113.
[11]	Zhang Xuejun,Xu Xingyou,Wang Yongshi,et al.Relationship between heterogeneity of source rocks and genetic mechanism of abnormally high pressure[J].Science China Earth Sciences,2013,56(11):1971-1976.
[12]	Zou Caineng,Zhang Guosheng,Yang Zhi,et al.Concepts,cha-racteristics,potential and technology of unconventional hydrocarbons:On unconventional petroleum geology[J].Petroleum Exploration and Development,2013,40(4):413-428.
[13]	Hunt J M.Petroleum geochemistry and geology[M].2nd ed.New York:W. H. Freeman,1995.
[14]	Berg R R,Gangi A F.Primary migration by oil-generation microfracturing in low-permeability source rocks:Application to the Austin chalk,Texas[J].AAPG Bulletin,1999,83(5):727-756.
[15]	Jia Wanglu,Wang Qiuling,Liu Jinzhong,et al.The effect of oil expulsion or retention on further thermal degradation of kerogen at the high maturity stage:A pyrolysis study of type Ⅱ kerogen from Pingliang shale,China[J].Organic Geochemistry,2014,71:17-29.
[16]	Ritter U.Fractionation of petroleum during expulsion from kerogen[J].Journal of Geochemical Exploration,2003,78-79:417-420.
[17]	Eseme E,Littke R,Krooss B M,et al.Experimental investigation of the compositional variation of petroleum during primary migration[J].Organic Geochemistry,2007,38(8):1373-1397.
[18]	Leythaeuser D,Schaefer R G,Radke M.Geochemical effects of primary migration of petroleum in Kimmeridge source rocks from Brae field area,North Sea.Ⅰ: Gross composition of C₁₅₊-soluble organic matter and molecular composition of C₁₅₊-saturated hydrocarbons[J].Geochimica et Cosmochimica Acta,1988,52(3):701-713.
[19]	Eseme E,Littke R,Krooss B M,et al.Experimental investigation of the compositional variation of acyclic paraffins during expulsion from source rocks[J].Journal of Geochemical Exploration,2006,89(13):100-103.
[20]	Sandvik E I,Young W A,Curry D J.Expulsion from hydrocarbon sources: The role of organic absorption[J].Organic Geochemistry,1992,19(13):77-87.
[21]	Stainforth J G.Practical kinetic modeling of petroleum generation and expulsion[J].Marine and Petroleum Geology,2009,26(4):552-572.
[22]	Bennett B,Chen M,Brincat D,et al.Fractionation of benzocarbazoles between source rocks and petroleums[J].Organic Geochemistry,2002,33(5):545-559.
[23]	Leythaeuser D,Radke M,Willsch H.Geochemical effects of primary migration of petroleum in Kimmeridge source rocks from Brae field area,North Sea.Ⅱ:Molecular composition of alkylated naphthalenes,phenanthrenes,benzothiophenes and dibenzothiophenes[J].Geochimica et Cosmochimica Acta,1988,52(12):2879-2891.
[24]	Löhr 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.
[25]	Furmann A,Mastalerz M,Schimmelmann A,et al.Relationships between porosity,organic matter,and mineral matter in mature organic-rich marine mudstones of the Belle Fourche and Second White Specks formations in Alberta,Canada[J].Marine and Petroleum Geology,2014,54:65-81.
[26]	Romero-Sarmiento M F,Ducros M,Carpentier B,et al.Quantitative evaluation of TOC,organic porosity and gas retention distribution in a gas shale play using petroleum system modeling:Application to the Mississippian Barnett shale[J].Marine and Petroleum Geology,2013,45:315-330.
[27]	Romero-Sarmiento M F,Ducros M,Carpentier B,et al.Predicting TOC,organic porosity and gas retention distribution in a shale-gas system using petroleum basin modelling//AAPG Annual Convention and Exhibition.Long Beach,California,USA:AAPG,2012.