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鄂尔多斯盆地东缘大宁–吉县区块及邻区山西组山2段物源分析

赵龙梅, 吴和源, 黄力, 赵靖舟, 赵浩阳, 耳闯, 李军

赵龙梅, 吴和源, 黄力, 等. 鄂尔多斯盆地东缘大宁–吉县区块及邻区山西组山2段物源分析[J]. 西北地质, 2023, 56(5): 322-331. DOI: 10.12401/j.nwg.2023132
引用本文: 赵龙梅, 吴和源, 黄力, 等. 鄂尔多斯盆地东缘大宁–吉县区块及邻区山西组山2段物源分析[J]. 西北地质, 2023, 56(5): 322-331. DOI: 10.12401/j.nwg.2023132
ZHAO Longmei, WU Heyuan, HUANG Li, et al. Material Source Analysis of Daning−Jixian Exploration Area and Its Adjacent Shan–2 Member in the Eastern Margin of Ordos Basin[J]. Northwestern Geology, 2023, 56(5): 322-331. DOI: 10.12401/j.nwg.2023132
Citation: ZHAO Longmei, WU Heyuan, HUANG Li, et al. Material Source Analysis of Daning−Jixian Exploration Area and Its Adjacent Shan–2 Member in the Eastern Margin of Ordos Basin[J]. Northwestern Geology, 2023, 56(5): 322-331. DOI: 10.12401/j.nwg.2023132

鄂尔多斯盆地东缘大宁–吉县区块及邻区山西组山2段物源分析

基金项目: 陕西省自然科学基础研究计划项目“准连续型溶蚀–胶结作用致密机理:以苏里格地区二叠系砂岩为例”(2020JQ-767),陕西省教育厅重点科学研究计划项目“封闭–半封闭体系下成岩作用特征与砂岩致密成因机理研究:以苏里格气区二叠系为例”(20JS128)联合资助。
详细信息
    作者简介:

    赵龙梅(1988−),女,硕士,高级工程师,主要从事致密气开发地质研究。E−mail:zhaolongmei@petrochina.com.cn

    通讯作者:

    吴和源(1986−),男,博士,讲师,主要从事石油天然气地质、沉积储层相关研究。E−mail:why@xsyu.edu.cn

  • 中图分类号: P618.130.2

Material Source Analysis of Daning−Jixian Exploration Area and Its Adjacent Shan–2 Member in the Eastern Margin of Ordos Basin

  • 摘要:

    鄂尔多斯盆地东缘山西组山2段具备优质的源储配置条件,是区域油气勘探的重要储集层位。结合露头古流向、重矿物及碎屑锆石测年数据,对大宁−吉县区块进行山2段物源分析,认为山2段沉积期大宁−吉县区块为南、北双物源共同控制,主要证据有3方面:①大宁−吉县东部露头区2段砂岩古流向发生显著变化,北部临汾市管头镇为由北向南的古流向,南部台头镇却为由南向北的古流向特征。②大宁−吉县油气探区山2亚段砂岩重矿物差异显著,以二郎山旅游区附近为界,超稳定重矿物锆石以及稳定重矿物白钛矿发生了显著的南北分异。③大宁−吉县探区内锆石样品测年峰值南北表现不统一,北部砂岩锆石测年表现为1 800 ~2 000 Ma和2 400 ~2 500 Ma 2个年龄峰值,南部砂岩锆石年龄峰值表现为300~700 Ma、1100~1 200 Ma、1 800~2 000 Ma和2 400~2 600 Ma等4个峰值。该认识不仅为大宁−吉县油气探区砂体展布刻画提供指导性线索的同时,也将为区域山2段沉积期古地理背景研究提供重要证据。

    Abstract:

    The Shan–2 member of Shanxi Formation in the eastern margin of Ordos basin has excellent source reservoir allocation conditions, and is an important reservoir for regional oil and gas exploration. Based on the outcrop paleocurrent, heavy minerals and clastic zircon dating data, the provenance analysis of Shan–2 member in Daning−Jixian exploration area is carried out, and it is considered that the Daning−Jixian oil and gas exploration area in Shan–2 member sedimentary period is jointly controlled by the south and north provenances. The main evidence is as follows. ① There has been a significant change in the ancient flow direction of sandstone in the outcrop area of the eastern part of Daning−Jixian. Guantou Town, Linfen City, in the north, is characterized by a north to south ancient flow direction, while Taitou Town, in the south, is characterized by a south to north ancient flow direction. ② There is a significant difference in the heavy minerals of sandstone in the Shan–2 sub section of the Daning−Jixian oil and gas exploration area. Taking the vicinity of the Erlang mountain tourist area as a boundary, there is a significant north−south differentiation in the ultra stable heavy mineral zircon and stable heavy mineral perovskite. ③ The peak ages of zircon samples in the Daning–Jixian exploration area are not uniform in the north and south. The zircon ages of sandstone in the north show two peak ages (1 800~2 000 Ma, 2 400~2 500 Ma ), while the zircon ages of sandstone in the south show four peak ages (300~700 Ma, 1 100~1 200 Ma, 1 800~2 000 Ma, 2 400~2 600 Ma). This understanding will not only provide guiding clues for the distribution and characterization of sand bodies in Daning−Jixian oil and gas exploration area, but also provide important evidence for the study of the paleogeographic background of the sedimentary period of Shan2 member.

  • 图  1   鄂尔多斯盆地大宁–吉县油气探区区域位置及采样位置图

    Figure  1.   Regional location and sampling location of Daning–Jixian oil and gas exploration area in Ordos basin

    图  2   柳林县成家庄太原组与山西组分界露头剖面及其实测岩性柱状图

    Figure  2.   The outcrop profile and lithological histogram of the boundary between Taiyuan Formation and Shanxi Formation in Chengjiazhuang, Liulin County

    图  3   鄂尔多斯盆地东缘山2亚段北岔沟砂岩露头古流向特征

    a. 柳林县陈家庄;b. 蒲县黑龙关镇;c. 蒲县尖草洼村;d. 乡宁县台头镇以西;e. 乡宁县台头镇南山以东;f. 澄城县三眼桥

    Figure  3.   Paleocurrent direction characteristics of Beichagou sandstone outcrop in Shan–2 sub segment, eastern margin of Ordos basin

    图  4   鄂尔多斯盆地大宁–吉县油气探区周边山2亚段古流向平面特征

    a. 大宁–吉县油气探区附近山2亚段露头古流向观测点平面位置及古流向特征;b. 图幅范围位于图a中浅蓝色虚线框内,为南北物源交汇区山2亚段露头观测点及其古流向特征

    Figure  4.   Characteristics of paleocurrent direction of Shan–2 sub member around Daning–Jixian oil and gas exploration area in Ordos basin

    图  5   大宁–吉县油气探区重矿物与ZTR指数平面分布特征

    Figure  5.   Distribution characteristics of heavy minerals and ZTR index in Daning–Jixian oil and gas exploration area

    图  6   鄂尔多斯盆地东缘大宁–吉县探区附近山2亚段北岔沟砂岩碎屑锆石年龄

    a. 柳林县陈家庄剖面;b. 蒲县黑龙关镇剖面;c. 大吉12井;d. 高6井;e. 澄城县三眼桥剖面

    Figure  6.   Zircon age of clastic rocks of Beichagou sandstone in Shan2 sub member near Daning–Jixian exploration area in the eastern margin of Ordos basin

    表  1   大宁–吉县区块山2段重矿物含量对比表

    Table  1   Comparison of heavy mineral content in Shan–2 section of Daning–Jixian block

    地层样品号陆源重矿物含量占比(%)自生重矿物(%)
    锆石电气石石榴子石磷灰石磁铁矿赤褐铁矿白钛矿绿帘石黝帘石榍石金红石锡石锐钛矿板钛矿云母绿泥石菱铁矿硬石膏重晶石黄铁矿
    山2 JT2-3 35.2 13.8 32.2 9.6 8.8
    山2 JT4-2 0.9 0.9 0.5 0.3 0.1
    山2 DJ20-9 5.1 0.5 1.4 1.4 6.5 0.4 0.9 0.4 0.5 82.9 8.8 8.1
    山2 DJ38-1 90.0
    山2 G4-1 37.4 1.0 3.6 2.1 32.8 0.5 0.5 4.6 2.1 15.4 3.6 0.5 7.7
    山2 H15-61 42.4 1.1 1.1 0.4 42.8 0.8 4.9 0.4 6.1 1.9 0.4
    山2 DJ45-2 38.5 1.8 36.7 0.9 9.2 2.8 10.1 44.0 3.8
    山2 DJ19-24 10.6 1.1 1.1 0.6 86.7 1.1 0.6
    山2 JT2-8 3.4 3.9 0.1 4.2 1.5 1.6
    山2 JT4-3 3.1 3.5 0.4 8.5 0.8 0.5
    山2 G3-2 8.0 1.2 88.3 0.6 1.9 1.0 14.5 1.0 2.5
    山2 DJ30-9 43.2 2.0 3.2 0.4 40.0 0.4 3.6 7.2 3.1 1.1
    山2 DJ35-15 5.1 4.1 3.1 25.5 19.4 1.0 41.8 15.5 42.5
    山2 DJ31-1 2.6 1.3 3.8 8.3 0.6 83.3 15.1 1.1
    山2 G2-1 42.7 4.4 3.1 0.9 42.7 0.9 0.4 1.3 0.4 0.4 2.7 5.3 2.5
    山2 G5-7 95.0
    山2 G8-1 95.0 48.0 3.5
    山2 DJ10-3 1.5 2.9 1.5 92.6 1.5 16.2 37.8
    山2 G7-3 31.8 8.4 3.4 1.1 43.6 1.1 3.4 0.6 6.7 50.7 0.5 0.5
    山2 H12-1 5.2 6.3 0.6 86.2 0.6 0.6 0.6 31.3 0.8
    山2 H4-3 33.3 7.4 2.1 23.8 8.5 0.5 24.3 8.8 7.9
    山2 H5-1 39.9 5.5 28.8 5.5 15.3 4.3 0.6 31.0 0.6 0.6
    山2 DJ53-8 3.9 1.7 1.7 1.7 1.1 89.9 20.4 2.1 3.3
    山2 DJ51-4 19.8 2.5 33.3 1.2 24.7 7.4 1.2 9.9 55.1 11.5
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出版历程
  • 收稿日期:  2023-02-24
  • 修回日期:  2023-07-09
  • 录用日期:  2023-07-13
  • 网络出版日期:  2023-07-19
  • 刊出日期:  2023-10-19

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