SHALE OIL RESOURCES ASSESSMENT FOR THE MEMBER CHANG 7 IN ANSAI AREA OF ORDOS BASIN
-
摘要:
鄂尔多斯盆地安塞地区三叠系延长组长7段油页岩在西南部较为发育，厚度可达到10 m以上，氯仿沥青"A"平均值达到0.87%，具备形成页岩油的地质基础。利用CT扫描电镜技术、核磁共振等技术对长7段油页岩储集空间及储集性能进行定量表征，揭示纳米级黏土颗粒片状孔隙是长7段页岩油的主要孔隙类型，平均有效孔隙度4.86%，平均含油饱和度为44.63%。安塞地区长7段具有页岩油赋存与聚集成藏的物质基础，大规模分布的黑色油页岩、良好的储集空间和充足的烃类，原油黏度低、油页岩可压裂性好、高角度裂缝发育等有利于页岩油在纳米级孔喉中流动和开采，预测资源潜力达到4.42×108 m3，并指出了水平井+体积压裂提高单井产量的攻关方向。
Abstract:The oil shale of the Chang 7 Member of the Triassic Yanchang Formation in the Ordos Basin mainly occur in the southwest Ansai area, with a thickness of more than 10 meters. The average content of chloroform asphalt "A"reaches 0.87%, that found the basis for shale oil formation. CT SEM, NMR and other techniques have been used to quantitatively characterize the storage space and storage performance of the oil shale. It's revealed that the nano-sized clay granules flake pores are the main types of pores for shale oil storage. The average effective porosity approaches 4.86% and the average oil saturation 44.63%. The Chang 7 Member of the Ansai area has provided excellent material basis for shale oil accumulation. There are great amount of and widely distributed black oil shale, sufficient hydrocarbon, low viscosity of crude oil, excellent high-angle fracture system and reservoir space, all of which are beneficial to the oil flowing through the nano-scale pore throat. Resource assessment suggests that a resource potential of 4.42×108 m3 is expected. Using horizontal well and volume fracturing, single-well production will be improved.
-
Key words:
- Ansai area /
- Triassic Chang 7 Member /
- oil shale /
- shale oil /
- Ordos Basin
-
-
表 1 研究区与盆地其他区域有机地球化学特征对比表
Table 1. Comparison of organic geochemical characteristics between the study area and other areas of the basin
下载: 导出CSV
表 2 安塞地区长7段原油簇组分分析对比
Table 2. Components of oil clusters in the Chang 7 Member of the Ansai area
井号 深度/m 层位 样品 TOC/% 氯仿沥青/% 饱和烃/% 芳烃/% 非烃/% 沥青质/% 丹165 1 172.6 长72 油页岩 4.52 1.854 58.47 13.66 8.77 10.78 招26-36 1 206.0 长72 原油 56.94 21.53 3.23 0.43
下载: 导出CSV
-
[1] 丁敏, 姚志刚, 张狄杰.鄂尔多斯盆地延长组长7页岩油存在的可能性分析[J].石油化工应用, 2011, 30(12):59-63. doi: 10.3969/j.issn.1673-5285.2011.12.018
[2] Cheng K, Wu W, Holditch S A, et al. Assessment of the distribution of technically recoverable Resources in north American basin[C]//Canadian Unconventional Resources and International Petroleum Conference, Calgary, Alberta, Canada, 2010.
[3] 李玉喜, 张金川.我国非常规油气资源类型和潜力[J].国际石油经济, 2011, 19(3):61-67. doi: 10.3969/j.issn.1004-7298.2011.03.011
[4] 张文正, 杨华, 杨奕华, 等.鄂尔多斯盆地长7优质烃源岩的岩石学、元素地球化学特征及发育环境[J].地球化学, 2008, 37(1):59-64. doi: 10.3321/j.issn:0379-1726.2008.01.008
[5] 杨华, 张文正.论鄂尔多斯盆地长7段优质油源岩在低渗透油气成藏富集中的主导作用:地质地球化学特征[[J].地球化学, 2005, 34(2): 147-154. doi: 10.3321/j.issn:0379-1726.2005.02.007
[6] 杨华, 李士祥, 刘显阳.鄂尔多斯盆地致密油、页岩油特征及资源潜力[J].石油学报, 2013, 34(1):1-11. http://d.old.wanfangdata.com.cn/Periodical/syxb201301001
[7] 吉利明, 吴涛, 李林涛.陇东三叠系延长组主要油源岩发育时期的古气候特征[J].沉积学报, 2006, 24(3):426-431. doi: 10.3969/j.issn.1000-0550.2006.03.016
[8] 刘群, 袁选俊, 林森虎, 等.湖相泥岩、页岩的沉积环境和特征对比——以鄂尔多斯盆地延长组7段为例[J].石油与天然气地质, 2018, 39(3):531-540.DOI:10.11743/ogg20180310.
[9] 骆垠山, 张哨楠, 张枝焕, 等.鄂尔多斯盆地南部油页岩矿有利勘探区预测[J].中国矿业, 2014, 23(1):83-108. http://d.old.wanfangdata.com.cn/Periodical/zgky201401019
[10] 高岗, 刘显阳, 王银会, 等.鄂尔多斯盆地陇东地区长7段页岩油特征与资源潜力[J].地学前缘, 2013, 20(2):140-146. http://d.old.wanfangdata.com.cn/Periodical/dxqy201302016
[11] 朱建伟, 赵刚, 刘博, 等.油页岩测井识别技术及应用[J].吉林大学学报(地球科学版), 2012, 42(2):289-295. http://d.old.wanfangdata.com.cn/Periodical/cckjdxxb201202001
[12] 章新文, 余志远, 黄庆.泌阳凹陷陆相页岩油富集主控因素分析[J].石油地质与工程, 2013, 27(3): 5-11. doi: 10.3969/j.issn.1673-8217.2013.03.002
[13] 肖立志.核磁共振成像测井与岩石核磁共振及其应用[M].北京:科学出版社, 1998.
[14] 陈木银, 陈江浩, 曹孟鑫, 等. MR核磁共振测井仪可靠性及应用效果分析[J].测井技术, 2018, 42(1):107-112. http://www.cnki.com.cn/Article/CJFDTotal-CJJS201801024.htm
[15] 王学武, 杨正明, 李海波, 等.利用核磁共振研究特低渗透油藏微观剩余油分布[J].应用基础与工程科学学报, 2013, 21(4):702-709. doi: 10.3969/j.issn.1005-0930.2013.04.012
[16] 李忠兴, 李健, 屈雪峰, 等.鄂尔多斯盆地长7致密油开发试验及认识[J].天然气地球科学, 2015, 26(10):1933-1940. http://d.old.wanfangdata.com.cn/Periodical/trqdqkx201510013
[17] 何崇康, 成良丙, 陈旭峰, 等.鄂尔多斯盆地新安边油田长7致密油有效储层识别与甜点优选[J].石油实验地质, 2017, 39(6):812-818. http://d.old.wanfangdata.com.cn/Periodical/sysydz201706012
-
图(10)
表(3)
计量
- 文章访问数: 542
- PDF下载数: 3
- 施引文献: 0