中国石油勘探

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玛湖凹陷及周缘佳木河组划分对比新认识与天然气勘探方向

王韬1,郑孟林1,任海姣1,李婷1,吴海生1,王绪龙1,张越迁1,常秋生1,李永军2,王霞田1
  

  1. 1 中国石油新疆油田公司;2 长安大学
  • 作者简介:王韬(1990-),男,新疆克拉玛依人,硕士,2015 年毕业于中国石油大学(华东),工程师,现从事油气综合地质 研究工作。地址:新疆克拉玛依市准噶尔路29 号新疆油田公司勘探开发研究院勘探研究所,邮政编码:834000。
  • 基金资助:
    国家科技重大专项“新疆北部深层区域构造格架、沉积演化与有利区带评价”(2017ZX05008006-003-001)。

New Understandings of Stratigraphic Division, Correlation and Analysis of Natural Gas Exploration Target of Jiamuhe Formation in Mahu Sag and its periphery

Wang Tao1, Zheng Menglin1, Ren Haijiao1, Li Ting1, Wu Haisheng1, Wang Xulong1, Zhang Yueqian1,Chang Qiusheng1, Li Yongjun2, Wang Xiatian1   

  1. 1 Research Institute of Exploration and Development of Xinjiang Oilfi eld Company Petrochina

摘要: 准噶尔盆地玛湖凹陷及周缘佳木河组是一套重要的天然气勘探层系,佳木河组划分对比研究对天然气勘探选区选带具有指导作用。前人研究中,佳木河组在露头、钻井、地震对比不清、天然气接续勘探方向不明。因此,应用多种地层研究方法,综合对比佳木河组露头、井下、地震特征,并结合天然气地球化学特征分析,进而探讨佳木河组划分对比方案及天然气勘探方向。结果表明:佳木河组为“下碎屑岩、上火山岩”岩性组合,时代归属早二叠世,厚度由玛北向中拐方向减薄;玛南—中拐地区原划为佳木河组的部分井段被剔除该层、属于上石炭统;玛北地区佳木河组具有供气能力,玛北地区深部是天然气勘探有利方向,佳木河组—石炭系“自生自储”“新生古储”的构造—岩性型圈闭具备较好潜力。

关键词: 佳木河组, 地层划分对比, 天然气勘探, 玛湖凹陷, 准噶尔盆地

Abstract: Jiamuhe Formation which in Mahu Sag and its periphery is one of important and real natural gas exploration formations in Junggar Basin. The study of stratigraphic division and correlation of Jiamuhe Formation is of guiding signifi cance to the selection of exploration zones and plays in this area. In previous studies, the correlation method and succeeding natural gas exploration target of Jiamuhe Formation are not clear. In order to establish the method of stratigraphic division and correlation of Jiamuhe Formation and judge the natural gas exploration target. The paper make a synthetical contrast of rock between outcrop, downhole and seismic data, combining with regional natural gas geochemical data. The study shows that, wherever the Jiamuhe Formation in, it is a Permian strata, the upper part of it is clastic, the lower part of it is volcanic .The strata thin from northern Mahu Sag towards Zhongguai Swell. Based on new method of division and correlation, part of drilling section which once belong to Jiamuhe Formation is removed and belong to Upper Carboniferous. Jiamuhe Formation in northern Mahu Sag has natural gas generation ability. The deep-seated structural-lithologic traps of Jiamuhe Formation or Carboniferous which source and reservoir in the sane bed or young source in old reservoir contain good potential in exploration of natural gas.

Key words: Jiamuhe formation, stratigraphic division and correlation, natural gas exploration, Mahu Sag, Junggar basin

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