上扬子地区不同构造位置牛蹄塘组页岩孔隙特征的对比研究
A comparative study of the pore structure of Niutitang shales at different tectonic positions in the Upper Yangtze region
查看参考文献48篇
文摘
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对位于不同构造位置的两条下寒武统牛蹄塘组页岩采石场剖面进行了垂向系统采样研究,并进行了有机地球化学、矿物学及孔隙度测试。酉阳丹泉剖面富有机质层段集中在牛蹄塘组下部,厚度在25 m以上,总有机碳含量(TOC)均大于5.65%,遵义松林剖面仅对下部富有机质页岩进行采样,但基于富有机质层段地球化学垂向变化趋势可进行对比研究。结果表明,页岩微孔体积主要由有机孔提供,且基本不受构造作用影响。松林剖面TOC值越高,伊利石含量越低,介孔体积越小;而构造稳定区页岩介孔体积除部分样品与松林剖面重合外,仍有部分样品介孔体积明显偏高,说明构造位置的差异对页岩介孔具有明显的影响。宏孔体积在TOC大于6.4%时有减小的趋势,但不同构造位置的两剖面样品受构造应力差异影响不明显。构造应力对孔隙的影响主要与岩石的力学性质及伊利石矿物孔的保存能力有关。 |
其他语种文摘
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Shales were systematically sampled from the Niutitang Formation stone pits in different tectonic positions in the Upper Yangtze region and experiments were performed to characterize the organic geochemistry, mineralogy, and pore structure at different scales. Organic-rich shales in the Danquan profile, Youyang area, were mostly concentrated in the lower part of the Niutitang Formation; the thickness of organic-rich shale with total organic carbon (TOC) values greater than 5.65% is more than 25 m. Though only part of the organic-rich shales from the lower part of the Niutitang Formation in the Songlin profile, Zunyi area, were sampled, a comparison of the two profiles was conducted through vertical variation in the geochemical parameters. The results showed that the micropores in the shales were mostly composed of organic pores and basically not influenced by the tectonic movement. The mesopores in the shales in tectonically positive areas decreased with increasing TOC and decreasing illite content. Partial data of mesopores in tectonically stable areas were overlain with the Songlin profile and the remainder of the mesopore data were apparently higher than that of the shales in the tectonically positive areas, suggesting that tectonic position has a close relation with mesopores in shale. In addition, there is a negative correlation between the macropore volume and TOC in research areas when TOC > 6.4% and the macropores of two profiles have similar decreasing trends. As a result, the influence of tectonic stress on pores is mainly related to the mechanical properties of the rock and the preservation of illite mineral pores. |
来源
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地球化学
,2019,48(2):171-183 【核心库】
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DOI
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10.19700/j.0379-1726.2019.02.007
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关键词
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牛蹄塘组
;
页岩
;
孔隙特征
;
构造位置
;
上扬子地区
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地址
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1.
中国科学院广州地球化学研究所, 有机地球化学国家重点实验室, 广东, 广州, 510640
2.
中国科学院大学, 北京, 100049
3.
山东省日照市教育局, 山东, 日照, 276800
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语种
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中文 |
文献类型
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研究性论文 |
ISSN
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0379-1726 |
学科
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地质学 |
基金
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中国科学院战略性先导科技专项
;
国家重大科技专项
;
国家973计划
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文献收藏号
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CSCD:6488955
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参考文献 共
48
共3页
|
1.
邹才能. 中国页岩气形成机理,地质特征及资源潜力.
石油勘探与开发,2010,37(6):641-653
|
被引
720
次
|
|
|
|
2.
Tan J Q. Shale gas potential of the major marine shale formations in the Upper Yangtze Platform, South China, Part II: Methane sorption capacity.
Fuel,2014,129:204-218
|
被引
27
次
|
|
|
|
3.
肖贤明. 中国南方下古生界页岩气远景区评价.
天然气地球科学,2015,26(8):1433-1445
|
被引
40
次
|
|
|
|
4.
Tian H. Characterization of methane adsorption on over mature Lower Silurian-Upper Ordovician shales in Sichuan Basin, southwest China: Experimental results and geological implications.
Int J Coal Geol,2016,156:36-49
|
被引
42
次
|
|
|
|
5.
Li X Q. Accumulation condition and favorable area evaluation of shale gas from the Niutitang Formation in northern Guizhou, South China.
J Nat Gas Geosci,2018,3(1):1-10
|
被引
3
次
|
|
|
|
6.
Guo T L. Formation and enrichment mode of Jiaoshiba shale gas field, Sichuan Basin.
Pet Explor Dev,2014,41(1):31-40
|
被引
35
次
|
|
|
|
7.
梁狄刚. 中国南方海相生烃成藏研究的若干新进展(一)南方四套区域性海相烃源岩的分布.
海相油气地质,2008,13(2):1-16
|
被引
260
次
|
|
|
|
8.
马超. 湘西一黔东地区牛蹄塘组页岩气勘探前景.
特种油气藏,2014,21(1):38-41
|
被引
10
次
|
|
|
|
9.
易同生. 贵州龙马溪组页岩气储层特征及其分布规律.
煤田地质与勘探,2015,43(3):22-27
|
被引
13
次
|
|
|
|
10.
Wang R Y. Analysis of developmental characteristics and dominant factors of fractures in Lower Cambrian marine shale reservoirs: A case study of Niutitang formation in Cen'gong block, southern China.
J Pet Sci Eng,2016,138:31-49
|
被引
9
次
|
|
|
|
11.
Loucks R G. Morphology, genesis, and distribution of nanometer-scale pores in siliceous mudstones of the Mississippian Barnett shale.
J Sediment Res,2009,79(12):848-861
|
被引
704
次
|
|
|
|
12.
Loucks R G. Spectrum of pore types and networks in mudrocks and a descriptive classification for matrix-related mudrock pores.
AAPG Bulletin,2012,96(6):1071-1098
|
被引
578
次
|
|
|
|
13.
Ross D J K. The importance of shale composition and pore structure upon gas storage potential of shale gas reservoirs.
Mar Petrol Geol,2009,26(6):916-927
|
被引
430
次
|
|
|
|
14.
Slatt R M. Pore types in the Barnett and Woodford gas shales: Contribution to understanding gas storage and migration pathways in fine-grained rocks.
AAPG Bulletin,2011,95(12):2017-2030
|
被引
315
次
|
|
|
|
15.
邹才能. 中国页岩气特征、挑战及前景(一).
石油勘探与开发,2015,42(6):689-701
|
被引
254
次
|
|
|
|
16.
Sun M D. Pore structure characterization of organic-rich Niutitang shale from China: Small angle neutron scattering (SANS) study.
Int J Coal Geol,2018,186:115-125
|
被引
12
次
|
|
|
|
17.
Wu C J. Pore characteristics differences between clay-rich and claypoor shales of the Lower Cambrian Niutitang Formation in the Northern Guizhou area, and insights into shale gas storage mechanisms.
Int J Coal Geol,2017,178:13-25
|
被引
8
次
|
|
|
|
18.
王濡岳. 黔北地区下寒武统牛蹄塘组页岩储层发育特征:以岑巩区块为例.
地学前缘,2017,24(6):286-299
|
被引
14
次
|
|
|
|
19.
曾维特. 渝东南-黔北地区牛蹄塘组页岩微-纳米级孔隙发育特征及主控因素分析.
地学前缘,2018,25:1-16
|
被引
1
次
|
|
|
|
20.
李贤庆. 黔北地区下古生界页岩气储层孔隙结构特征.
中国矿业大学学报,2016,45(6):1172-1183
|
被引
17
次
|
|
|
|
|