Unconformity characteristics of Huaiyuan movement in the northeast of Wushenqi paleo-uplift in Ordos Basin and its implications for karst reservoir generation

被引：0

作者：

Zhang J. ^{[1
,2
]}

Zhang Y. ^{[2
]}

Gu N. ^{[1
,2
]}

Jin X. ^{[1
,2
]}

Zhang T. ^{[1
,2
]}

Liu S. ^{[3
]}

Jia H. ^{[3
]}

Yang J. ^{[4
]}

Liu L. ^{[1
,2
]}

Gao X. ^{[1
,2
]}

机构：

[1] Ｋey Laboratory of Deep Geology and Resources, SINOPEC, Beijing

[2] Petroleum Exploration and Production Research Institute, SINOPEC, Beijing

[3] Institute of Exploration and Development, Huabei Oil/Gas Branch Company, Henan, Zhengzhou

[4] School of Energy Resources, China University of Geosciences（Beijing）, Beijing

来源：

Oil and Gas Geology | 2023年 / 44卷 / 01期

关键词：

Huaiyuan movement; karst reservoir; Ordos Basin; Sanshanzi Formation; unconformity surface; Wuzheng paleo-uplift;

D O I：

10.11743/ogg20230108

中图分类号：

学科分类号：

摘要：

Huaiyuan movement during the first and second episodes of the Caledonian was a major tectonic activity in the Early Paleozoic Ordos Basin，featuring long-term sedimentary hiatus and forming a more effective karst reservoir near the paleo-uplift，with the impact second only to the Caledonian（the third episode）- Hercynian movement. To the east side of Wushenqi paleo-uplift，the first member of the Ordovician Majiagou Formation （Ma 1 Member） was in parallel，unconformable contact with the Cambrian Sanshanzi Formation as the result of Huaiyuan Movement，and on either side of the unconformity were carbonate strata with great differences in terms of electrical logging properties，mineral，elemental and isotopic compositions. The Sanshanzi Formation was of fine-crystalline dolomites with irregular dissolved pores and karst reservoirs. The well logging response shows low gamma value and high resistivity at the interval. The reservoirs of the formation were mostly deposited in relatively high-energy shoals near the paleo-uplift with normal seawater，and experienced reflux dolomitization at shallow burial stages. The Ma 1 Member is the first interval of sediments after the Huaiyuan movement，featuring complex lithology and mixed deposition of anhydrite，dolomite，mud and sand due to its proximity to the Wushenqi paleo-land. In terms of the depositional setting，the Ma 1 member was of marine type，that is，mixed tidal flat near the paleo-land in the early transgression period，though with great difference from the Sanshanzi Formation. The climate was relatively arid during its deposition，and the deposits were dominated by marine carbonates with intermittent terrigenous clastic supply. Its dolomite was a result of enecontemporaneous sabkha dolomitization. Controlled by both the primary facies belt with relatively high energy and the dolomitization as well as karstification related to the Huaiyuan movement，the reservoirs in the Sanshanzi Formation were mainly formed by a combination of dolomitization and epigenetic karstification and are widely seen in the vicinity of Wushenqi，Zhenyuan and Lyuliang paleo-uplifts. © 2023 Editorial Department of Oil and Gas Geology. All rights reserved.

引用

页码：101 / 109

页数：8

共 32 条

[1] LOUCKS R G., Paleocave carbonate reservoirs：Origins，burial-depth modifications，spatial complexity，and reservoir implications ［J］, AAPG Bulletin, 83, 11, pp. 1795-1834, (1999)
[2] QI Lixin, YUN Lu, Development characteristics and main controlling factors of the Ordovician carbonate karst in Tahe Oilfield［J］, Oil & Gas Geology, 31, 1, pp. 1-12, (2010)
[3] HE Zhiliang, MA Yongsheng, ZHU Dongya, Et al., Theoretical and technological progress and research direction of deep and ultra-deep carbonate reservoirs［J］, Oil & Gas Geology, 42, 3, pp. 533-546, (2021)
[4] MA Yongsheng, LI Maowen, CAI Xunyu, Et al., Advances in basic research on the mechanism of deep marine hydrocarbon enrichment and key exploitation technologies ［J］, Petroleum Geology and Experiment, 43, 5, pp. 737-748, (2021)
[5] JIAO Fangzheng, Significance and prospect of ultra-deep carbonate fault-karst reservoirs in Shunbei area，Tarim Basin［J］, Oil & Gas Geology, 39, 2, pp. 207-216, (2018)
[6] YE Tao, WANG Qingbin, HUANG Zhi, Et al., Characteristic of sequence stratigraphic framework and its controls on reservoir：A case study of Lower-Paleozoic carbonate in southwest area of Bohai Sea［J］, Journal of Jilin University（Earth Science Edition）, 51, 4, pp. 991-1005, (2021)
[7] MAO Xianyu, SONG Benbiao, TIAN Changbing, Effect of differential early diagenesis controlled by sequence boundary on carbonate reserviors：A case study of Mishrif Formation in R Oilfield，Iraq［J］, Fault-Block Oil and Gas Field, 29, 3, pp. 344-352, (2022)
[8] YANG Hua, LIU Xinshe, ZHANG Daofeng, Main controlling factors of gas pooling in Ordovician marine carbonate reservoirs in the Ordos Basin and advances in gas exploration［J］, Natural Gas Industry, 33, 5, pp. 1-12, (2013)
[9] HU Chunqiao, REN Laiyi, HE Yonghong, Et al., Petroleum exploration history and enlightenment of Yanchang exploration area in Ordos Basin［J］, Xinjiang Petroleum Geology, 42, 3, pp. 312-318, (2021)
[10] HE Faqi, XU Bingwei, SHAO Longkan, On philosophy and innovative thinking of oil & gas exploration and development：Commemoration of the first oil well on land in China，Well-Yan 1 ［J］, Reservoir Evaluation and Development, 12, 2, pp. 265-273, (2022)

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