| 鄂尔多斯盆地东南部长7段页岩孔隙特征及其控制因素 |
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| 引用本文： | 曹尚,李树同,党海龙,邢海雪,张丽霞,张天龙,白璞. 鄂尔多斯盆地东南部长7段页岩孔隙特征及其控制因素[J]. 新疆石油地质, 2022, 43(1): 11-17. DOI: 10.7657/XJPG20220102 |
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| 作者姓名： | 曹尚 李树同 党海龙 邢海雪 张丽霞 张天龙 白璞 |
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| 作者单位： | 1.中国科学院 西北生态环境资源研究院,兰州 7300002.中国科学院大学 地球科学学院,北京 1000493.陕西延长石油（集团）有限责任公司 研究院,西安 7100654.大庆油田有限责任公司 第七采油厂,黑龙江 大庆 163000 |
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| 基金项目： | 国家科技重大专项(2017ZX05039-001-005)。 |
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| 摘 要： | 为明确鄂尔多斯盆地长7段陆相页岩储集层孔隙特征,通过扫描电镜、铸体薄片、气体吸附法和压汞法等实验手段,对长7段页岩储集层中纯页岩和粉砂质纹层发育的页岩孔隙特征进行了对比分析,并探讨了可能影响孔隙发育的因素.纯页岩中主要发育黏土矿物粒间孔和有机孔,粉砂质纹层发育页岩中主要发育粒间孔和粒内溶孔;相比纯页岩,粉砂质纹层的中—...
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| 关 键 词： | 鄂尔多斯盆地 延长组 长7段 页岩 粉砂质纹层 孔隙特征 控制因素 |
| 收稿时间： | 2021-07-23 |
Pore Characteristics and Controlling Factors of Chang 7 Shale in Southeastern Ordos Basin |
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| CAO Shang,LI Shutong,DANG Hailong,XING Haixue,ZHANG Lixia,ZHANG Tianlong,BAI Pu. Pore Characteristics and Controlling Factors of Chang 7 Shale in Southeastern Ordos Basin[J]. Xinjiang Petroleum Geology, 2022, 43(1): 11-17. DOI: 10.7657/XJPG20220102 |
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| Authors: | CAO Shang LI Shutong DANG Hailong XING Haixue ZHANG Lixia ZHANG Tianlong BAI Pu |
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| Affiliation: | 1. Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China2. College of Earth Science, University of Chinese Academy of Sciences, Beijing 100049, China3. Research Institute, Shaanxi Yanchang Petroleum(Group) Co., Ltd., Xi’an, Shaanxi 710065, China4. No.7 Oil Production Plant, Daqing Oilfield Company Ltd., Daqing, PetroChina, Daqing, Heilongjiang 163000, China |
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| Abstract: | In order to identify the pore characteristics of the continental shale in the seventh member of Yanchang formation (Chang 7 member) in southeastern Ordos basin, the shale cores taken from pure shale and silty laminae of Chang 7 member were analyzed for pore characteristics with the aid of experimental methods such as SEM, cast slice, gas adsorption method, and mercury intrusion, and the factors that may affect pore development were discussed. The results show that pure shale mainly contains clay mineral intergranular pores and organic pores, and silty laminae holds intergranular pores and intragranular dissolved pores. Compared with pure shale, silty laminae has mesopores-macropores with larger porosity, pore diameter and pore volume. In pure shale, the development of pores is mainly controlled by the contents of rigid particle and organic matter. In silty laminate, the controlling factors for shale pore development are mainly the preservation conditions. For instance, the enrichment of rigid particles such as quartz and feldspar is conducive to pore preservation, acidic fluid can corrode feldspar to create more pores, and liquid hydrocarbons can wrap minerals to inhibit cementation. The shale in silty laminae is superior to pure shale with respect to pore structure and physical properties. Thus, the silty laminae zones should be paid more attention in shale oil/gas exploration. |
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| Keywords: | Ordos basin Yanchang formation Chang 7 member shale silty laminae pore characteristic controlling factor |
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