Characteristics and main controlling factors of shale gas reservoirs in transitional facies on the eastern margin of Ordos Basin
-
摘要:
为了研究鄂尔多斯盆地石炭-二叠系海陆过渡相页岩气储层孔隙特征，选取页4井、页1井和DT803井海陆过渡相泥页岩样品进行了扫描电镜、低温液氮吸附实验以及相关的地球化学实验，分析了海陆过渡相页岩气储层的孔隙类型、特征及其影响因素。实验结果表明：研究区页岩孔隙以粒间孔和有机质孔最为发育；页岩孔形态以狭窄的平行板状为主，孔隙微观孔径分布范围为1~60 nm，主孔径分布介于1~6 nm和40~60 nm，介孔为孔体积和比表面积的主要贡献者，但微孔对比表面积的贡献不容忽视；有机碳和黏土矿物含量是海陆过渡相页岩孔隙发育的主要影响因素，脆性矿物对孔隙发育影响不明显。
Abstract:In order to study the pore characteristics of shale gas reservoirs on the eastern margin of Ordos Basin, the authors selected the shale in Ye-1, Ye-4 and DT803 wells for experiments including scanning electron microscope, nitrogen sorption-desorption experiments and related geochemical experiments. Meanwhile, the transitional facies shale pore types, characteristics and influencing factors of gas reservoir were analyzed. The results show that inter-granular pore and organic pores are most developed in the shale, the pore morphology of the shale is mainly in the narrow parallel-plate, the pore size distribution range is 1-60nm, and the main pore size distribution is between 1-6nm and 40-60nm. The mesopores make a major contribution to pores specific surface area and pore volume, the contribution of the micro-pores to the surface area cannot be ignored; the values of organic carbon and clay minerals are the main controlling factors of the pore development, and the influence of brittle minerals on the development of pores is not obvious.
-
-
![]()
图 1 鄂尔多斯盆地东缘区域地质及海陆过渡相地层综合柱状图
Figure 1. The location and tectonic units of the eastern margin of Ordos Basin and comprehensive columnar section of marine-continental transitional formation
![]()
图 2 页岩无机矿物孔赋存形态与特征
a-黏土矿物溶蚀孔，样品LL2-2；b-石英颗粒晶间孔、溶蚀孔和石英黏土矿物粒间孔，样品LL4-2；c-黏土矿物层间缝，样品LL2-3；d-矿物铸模孔，WS2-1；e-黄铁矿晶间孔，样品WS2-1；f-高岭石粒间孔，样品WS2-3
Figure 2. Occurrence status and characteristics of nonorganic pores of the shale
a-Corrosion pores, LL2-2;b-Corrosion pores and pores between quartz and clay minerals, LL4-2;c-The channel between clay minerals, LL2-3; d-Mould pore, WS2-1; e-Intercrystalline solution pores, WS2-1;f-The pores between kaolinite, WS2-3
![]()
图 3 页岩有机孔及微裂缝赋存形态与特征
Figure 3. Occurrence status and characteristics of organic pores and micro-crack of the shale
![]()
图 6 页岩样品不同孔径比表面积、孔体积的百分含量分布
Figure 6. Percentage distribution of total pore volume and BET surface area of the shale sample
表 2 过渡相页岩孔隙分类特征
Table 2 Characteristics of pore types of shale gas reservoirs in transitional facies
下载: 导出CSV
-
[1] Wang Y, Zhu Y, Chen S, et al. Characteristics of the nanoscale pore structure in northwestern Hunan shale gas reservoirs using field emission scanning electron microscopy, high-pressure mercury intrusion, and gas adsorption[J]. Energy & Fuels, 2014, 28(2): 945-955. https://www.researchgate.net/publication/263947370_Characteristics_of_the_Nanoscale_Pore_Structure_in_Northwestern_Hunan_Shale_Gas_Reservoirs_Using_Field_Emission_Scanning_Electron_Microscopy_High-Pressure_Mercury_Intrusion_and_Gas_Adsorption
[2] Huang J, Zou C, Dong D, et al. Geochemical and reservoir characteristics of the Upper Triassic continental shale in the Sichuan Basin, China[J]. Energy Exploration & Exploitation, 2015, 33(3): 375-395. https://www.researchgate.net/publication/281730641_Geochemical_and_reservoir_characteristics_of_the_Upper_Triassic_continental_shale_in_the_Sichuan_Basin_China
[3] 伍坤宇, 张廷山, 杨洋, 等.昭通示范区黄金坝气田五峰-龙马溪组页岩气储层地质特征[J].中国地质, 2016, 43(1): 275-287. http://geochina.cgs.gov.cn/ch/reader/view_abstract.aspx?file_no=20160120&flag=1 Wu Kunyu, Zhang Tingshan, Yang Yang, et al. Geological characteristics of Wufeng-Longmaxi shale-gas reservoir in the Huangjinba gas field, Zhaotong National Shale Gas Demonstration Area[J]. Geology in China, 2016, 43(1): 275-287(in Chinese with English abstract). http://geochina.cgs.gov.cn/ch/reader/view_abstract.aspx?file_no=20160120&flag=1
[4] 薛冰, 张金川, 唐玄, 等.黔西北龙马溪组页岩微观孔隙结构及储气特征[J].石油学报, 2015, 36(2): 138-149. http://www.cnki.com.cn/Article/CJFDTOTAL-SYXB201502002.htm Xue Bing, Zhang Jinchuan, Tang Xuan, et al. Characteristics of microscopic pore and gas accumulation shale in Longmaxi Formation, northwest Guizhou[J]. Acta Petrolei Sinica, 2015, 36(2): 138-149(in Chinese with English abstract). http://www.cnki.com.cn/Article/CJFDTOTAL-SYXB201502002.htm
[5] 顾志翔, 彭勇民, 何幼斌, 等.湘中坳陷二叠系海陆过渡相页岩气地质条件[J].中国地质, 2015, 42(1): 288-299. http://geochina.cgs.gov.cn/ch/reader/view_abstract.aspx?file_no=20150122&flag=1 Gu Zhixiang, Peng Yongmin, He Youbin, et al. Geological conditions of Permian sea-land transitional facies shale gas in the Xiangzhong depression[J]. Geology in China, 2015, 42(1): 288-299(in Chinese with English abstract). http://geochina.cgs.gov.cn/ch/reader/view_abstract.aspx?file_no=20150122&flag=1
[6] 唐玄, 张金川, 丁文龙, 等.鄂尔多斯盆地东南部上古生界海陆过渡相页岩储集性与含气性[J].地学前缘, 2016, 23(2): 147-157. http://www.cnki.com.cn/Article/CJFDTOTAL-DXQY201602017.htm Tang Xuan, Zhang Jinchuan, Ding Wenlong, et al. The reservoir property of the Upper Paleozoic marine-continental transitional shale and its gas-bearing capacity in the Southeastern Ordos Basin. Earth Science Frontiers, 2016, 23(2): 147-157(in Chinese with English abstract). http://www.cnki.com.cn/Article/CJFDTOTAL-DXQY201602017.htm
[7] 严继民, 张启元.吸附与凝聚:固体的表面与孔[M].北京:科学出版社, 1979. Yan Jimin, Zhang Qiyuan. Adsorption and Condensation:the Surface and Pore of Solid[M].Beijing:Science Press, 1979(in Chinese with English abstract).
[8] Brunauer S, Emmett P H, Teller E. Adsorption of gases in multimolecular layers[J]. Journal of the American Chemical Society, 1938, 60(2): 309-319. doi: 10.1021/ja01269a023
[9] Rouquerol J, Avnir D, Fairbridge C W, et al. Recommendations for the characterization of porous solids (Technical Report)[J]. Pure and Applied Chemistry, 1994, 66(8): 1739-1758. http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.460.3717
[10] 杨峰, 宁正福, 张世栋, 等.基于氮气吸附实验的页岩孔隙结构表征[J].天然气工业, 2013, 33(4): 135-140. http://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201304031.htm Yang Feng, Ning Zhengfu, Zhang Shidong, et al. Characterization of pores structures in shales through nitrogen adsorption experiment[J].Natural Gsa Industry, 2013, 33(4): 135-140(in Chinese with English abstract). http://www.cnki.com.cn/Article/CJFDTOTAL-TRQG201304031.htm
[11] Pan L, Xiao X, Tian H, et al. A preliminary study on the characterization and controlling factors of porosity and pore structure of the Permian shales in Lower Yangtze region, Eastern China[J]. International Journal of Coal Geology, 2015, 146: 68-78. doi: 10.1016/j.coal.2015.05.005
[12] 刘圣鑫, 钟建华, 马寅生, 等.柴东石炭系页岩微观孔隙结构与页岩气等温吸附研究[J].中国石油大学学报:自然科学版, 2015, 39(1): 33-42. http://www.cnki.com.cn/Article/CJFDTOTAL-SYDX201501005.htm Liu Shengxin, Zhong Jianhua, Ma Yinsheng, et al. Study of microscopic pore structure and adsorption isothermal of carboniferous shale, Eastern Qaidam Basin[J]. Journal of China University of Petroleum, 2015, 39(1): 33-42(in Chinese with English abstract). http://www.cnki.com.cn/Article/CJFDTOTAL-SYDX201501005.htm
[13] 赵迪斐, 郭英海, 解徳录, 等.基于低温氮吸附实验的页岩储层孔隙分形特征[J].东北石油大学学报, 2014, (6):100-108, 11-12. http://www.cnki.com.cn/Article/CJFDTOTAL-DQSY201406014.htm Zhao Difei, Guo Yinghai, Xie Delu, et al. Fractal characteristics of shale reservoir pores based on nitrogen adsorption[J]. Journal of Northeast Petroleum University, 2014, (6):100-108, 11-12(in Chinese with English abstract). http://www.cnki.com.cn/Article/CJFDTOTAL-DQSY201406014.htm
[14] Ross D J K, Bustin R M. Characterizing the shale gas resource potential of Devonian-Mississippian strata in the Western Canada sedimentary basin: Application of an integrated formation evaluation[J]. AAPG Bulletin, 2008, 92(1): 87-125. doi: 10.1306/09040707048
[15] 罗超, 刘树根, 孙玮, 等.鄂西-渝东地区下寒武统牛蹄塘组黑色页岩孔隙结构特征[J].东北石油大学学报, 2014, 38(2): 8-17. http://mall.cnki.net/magazine/Article/DQSY201402004.htm Luo Chao, Liu Shugen, Sun Wei, et al. Pore structure characterization of black shale in the lower Cambrian Niutitang formation in western Hubei and eastern Chongqing area[J]. Journal of Northeast Petroleum University, 2014, 02: 8-17, 79, 5-6(in Chinese with English abstract). http://mall.cnki.net/magazine/Article/DQSY201402004.htm
[16] Loehr 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. doi: 10.1016/j.orggeochem.2015.07.010
[17] 吉利明, 邱军利, 夏燕青, 等.常见黏土矿物电镜扫描微孔隙特征与甲烷吸附性[J].石油学报, 2012, 33(2): 249-256. http://www.cnki.com.cn/Article/CJFDTOTAL-SYXB201202010.htm Ji Liming, Qiu Junli, Xia Yanqing, et al. Micro-pore characteristics and methane adsorption properties of commom clay minerals by electron microscope scanning[J].Acta Petrolei Sinica, 2012, 33(2): 249-256(in Chinese with English abstract). http://www.cnki.com.cn/Article/CJFDTOTAL-SYXB201202010.htm
计量
- 文章访问数: 2959
- HTML全文浏览量: 412
- PDF下载量: 5585
