Sequence stratigraphy models of carbonate-evaporite successions and their controls on source rocks and reservoirs in the Ordovician Majiagou Formation， Ordos Basin

被引：0
作者：
Zhang T. [1 ]
Zhang Y. [1 ]
Jin X. [1 ]
Zhou Y. [1 ]
Zhang J. [1 ]
Gu N. [1 ]
Zhang W. [2 ]
Wang R. [1 ]
Lu K. [1 ]
机构：
[1] Petroleum Exploration and Production Research Institute, SINOPEC, Beijing
[2] Petroleum Exploration & Production Research Institute, Hubei Branch of SINOPEC, Henan, Zhengzhou
来源：
Oil and Gas Geology | 2023年 / 44卷 / 01期
关键词：
carbonate-evaporite; Majiagou Formation; Ordos Basin; Ordovician; reservoir; sequence stratigraphy model; source rock;
D O I：
10.11743/ogg20230109
中图分类号：
学科分类号：
摘要：
Based on the existing research results and the classical sequence stratigraphy theory of Vail P. R. ，this study takes into account the sedimentological principle of carbonate-evaporite，platform morphology，and lithological association characteristics of basin interior and margins to propose a sequence stratigraphic division model for the Majiagou Formation in Ordos Basin. According to the model，the sequence，which consists of evaporites mainly at the lower part and shallow water carbonates in the upper part，can be divided into five third-order sequences with boundaries respectively at the bottom of members of Ma1，Ma3，Ma510，Ma56，and Ma54. The bottom and top of Majiagou Formation are regional unconformity surfaces. Within the duration of lowstand systems tract of these third-order sequences，the carbonates and evaporite interfinger each other. The number of the evaporite layers is related to the number of hiatus（unconformity）in the adjacent carbonate sequences. The existence of these 4-5th order hiatus（unconformities）is the prerequisite for the development of interlayer dissolution and determines the location of source rock layers of inter-evaporite. Potential hydrocarbon source rocks are likely to be developed in three evaporative sequences of Ma1，Ma3 and Ma56 members in the lowstand systems tract，which are mainly distributed in the lows surrounding the salt lake and the slope areas of the basin center；moreover，are characterized by thin layers and large accumulated thickness. The sedimentary facies and multi-order sequence boundaries control the development of reservoirs，and two types of reservoirs are mainly formed：（1）The porous dolomitic reservoirs of beach facies are mainly developed in the middle and upper parts of highstand systems tract （HST）of third-to-fourth-order sequence，and the superimposed areas of the sedimentary hiatus and beach facies are the favorable zones for the porous reservoirs. （2）The moldic pore-type gypsodolomite reservoirs are mainly developed during the secondary transgression of the lowstand systems tract，and the tidal flat facies zone in the basin margins surrounding the paleo-uplift are the favorable horizons for the development of reservoirs of moldic pore type. © 2023 Editorial Department of Oil and Gas Geology. All rights reserved.
引用
收藏
页码：110 / 124
页数：14
相关论文
共 54 条
  • [1] Di XIAO, Jian CAO, Xiucheng TAN, Et al., Marine carbonate reservoirs formed in evaporite sequences in sedimentary basins：A review and new model of epeiric basin-scale moldic reservoirs［J］, Earth-Science Reviews, 223, (2021)
  • [2] ZHAO Wenzhi, SHEN Anjiang, QIAO Zhanfeng, Et al., Theoretical progress in carbonate reservoir and discovery of large marine oil and gas fields in China ［J］, China Petroleum Exploration, 27, 4, pp. 1-15, (2022)
  • [3] SU Chengpeng, HE Ying, SONG Xiaobo, Et al., Reinterpretation of gas sources in the Middle Triassic Leikoupo Formation in Western Sichuan gas field， Sichuan Basin［J］, Oil & Gas Geology, 43, 2, pp. 341-352, (2022)
  • [4] ZHANG Manlang, GUO Zhenhua, ZHANG Lin, Et al., Characteristics of and main factors controlling the karst shoal reservoir of the Lower Cambrian Longwangmiao Formation in the Anyue Gas Field， central Sichuan Basin， China［J］, Earth Science Frontiers, 28, 1, pp. 235-248, (2021)
  • [5] WARREN J K., Evaporites： A geological compendium［M］, pp. 86-185, (2016)
  • [6] ZHONG Yisi, WANG Licheng, DONG Haowei, Evaporite sedimentary characteristics and environment：A review［J］, Acta Sedimentologica Sinica, 40, 5, pp. 1188-1214, (2022)
  • [7] WEN Huaguo, HUO Fei, GUO Pei, Et al., Advances and prospects of dolostone-evaporite paragenesis system［J］, Acta Sedimentologica Sinica, 39, 6, pp. 1321-1343, (2021)
  • [8] PRINCE J, RAINBIRD R H, WING B A., Evaporite deposition in the mid-Neoproterozoic as a driver for changes in seawater chemistry and the biogeochemical cycle of sulfur［J］, Geology, 47, 4, pp. 375-379, (2019)
  • [9] HU Anping, SHEN Anjiang, YANG Hanxuan, Et al., Dolomite genesis and reservoir-cap rock assemblage in carbonate-evaporite paragenesis system［J］, Petroleum Exploration and Development, 46, 5, pp. 916-928, (2019)
  • [10] LIN Changsong, Sequence and depositional architecture of sedimentary basin and process responses［J］, Acta Sedimentologica Sinica, 27, 5, pp. 849-862, (2009)
123456