新疆石油地质

新疆石油地质 ›› 2016, Vol. 37 ›› Issue (zk(English) ): 1-7.

• OIL AND GAS EXPLORATION •    下一篇

Optimization of Favorable Reservoir-Caprock Assemblages of Middle-Upper Permian in Mahu Sag, Junggar Basin

YANG Fan1, WEI Yanzhao1, Abulimiti2, CHEN Gangqiang2, BIAN Baoli2   

  1. 1. Research Institute of Petroleum Exploration, Development, PetroChina, Beijing 100083, China;
    2. Research Institute of Exploration, Development, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China
  • 出版日期:2017-01-01 发布日期:2021-05-24
  • 作者简介:YANG Fan,E-mail:yf2010@petrochina.com.cn

Optimization of Favorable Reservoir-Caprock Assemblages of Middle-Upper Permian in Mahu Sag, Junggar Basin

YANG Fan1, WEI Yanzhao1, Abulimiti2, CHEN Gangqiang2, BIAN Baoli2   

  1. 1. Research Institute of Petroleum Exploration, Development, PetroChina, Beijing 100083, China;
    2. Research Institute of Exploration, Development, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China
  • Online:2017-01-01 Published:2021-05-24
  • About author:YANG Fan,E-mail:yf2010@petrochina.com.cn

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摘要： This paper presents the sequence stratigraphic classification of single well of the Middle-Upper Permian in slope area surrounding Mahu sag of Junggar basin, and the sequence stratigraphic correlation of well logging and seismic profile, dividing the Xiazijie formation, the lower Wuerhe formationtion and the upper Wuerhe formation into two second-order sequences and six third-order sequences, and recognizes the thick glutenite reservoirs of the middle-lower part of Xiazijie formation, the lower and upper parts of lower Wuerhe formationtion, and upper Wuerhe formation, as well as three regional caprocks in the upper part of Xiazijie formation, the middle part of lower Wuerhe formationtion and the top of upper Wuerhe formation, by which three favorable reservoir-caprock assemblages are given. The middle and lower assemblages are controlled by low stand system tract’s slope break belt, and dominated by lithologic and structural-lithologic reservoirs;; the upper one is controlled by large-scale unconformities of the Permian-Triassic and the lower Wuerhe formationtion-upper Wuerhe formation, and dominated by stratigraphic reservoir which is characterized by relatively shallow burial, matching well with oil source faults and high efficient petroleum transport system, it could be an important area for the recent hydrocarbon exploration.

关键词: Junggar basin, Mahu sag, Permian, sequence stratigraphy, reservoir-caprock assemblage

Abstract: This paper presents the sequence stratigraphic classification of single well of the Middle-Upper Permian in slope area surrounding Mahu sag of Junggar basin, and the sequence stratigraphic correlation of well logging and seismic profile, dividing the Xiazijie formation, the lower Wuerhe formationtion and the upper Wuerhe formation into two second-order sequences and six third-order sequences, and recognizes the thick glutenite reservoirs of the middle-lower part of Xiazijie formation, the lower and upper parts of lower Wuerhe formationtion, and upper Wuerhe formation, as well as three regional caprocks in the upper part of Xiazijie formation, the middle part of lower Wuerhe formationtion and the top of upper Wuerhe formation, by which three favorable reservoir-caprock assemblages are given. The middle and lower assemblages are controlled by low stand system tract’s slope break belt, and dominated by lithologic and structural-lithologic reservoirs;; the upper one is controlled by large-scale unconformities of the Permian-Triassic and the lower Wuerhe formationtion-upper Wuerhe formation, and dominated by stratigraphic reservoir which is characterized by relatively shallow burial, matching well with oil source faults and high efficient petroleum transport system, it could be an important area for the recent hydrocarbon exploration.

Key words: Junggar basin, Mahu sag, Permian, sequence stratigraphy, reservoir-caprock assemblage