新疆石油地质

新疆石油地质 ›› 2008, Vol. 29 ›› Issue (3): 306-308.

• 油气勘探 • 上一篇    下一篇

溶蚀在形成碱性火山岩优质储集层中的作用——以准噶尔盆地陆西地区石炭系火山岩为例

雷天柱1, 石新璞2, 孔玉华2, 张顺存1, 方琳浩1, 史基安1   

  1. 1.中国科学院地质与地球物理研究所, 兰州730000;
    2.中国石油新疆油田分公司勘探开发研究院, 新疆克拉玛依834000
  • 收稿日期:2007-11-13 发布日期:2020-08-19
  • 作者简介:雷天柱(1974-), 男, 甘肃靖远人, 在读博士研究生, 油气地球化学,(Tel)13109407828(E-mail)leitianzhu@163.com
  • 基金资助:
    国家重点基础研究计划发展(973)项目(2006CB202305)和国家自然科学基金项目(40643016)资助

Effect of Dissolution on Forming High-Quality Reservoir in Alkaline Volcanic Rocks—An example from Carboniferous volcanicrocks in Luxiarea in Junggar basin

LEI Tian-zhu1, SHI Xin-pu2, KONG Yu-hua2, ZHANG Shun-cun1, FANG Lin-hao1, SHI Ji-an1   

  1. 1. Key Laboratory of Gas Geochemistry, Institute of Geology and Geophysics, CAS, Lanzhou, Gansu 730000, China;
    2. Research Institute of Exploration and Development, Xinjiang Oilfield Company, Karamay, Xinjiang 834000, China
  • Received:2007-11-13 Published:2020-08-19

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摘要： 对准噶尔盆地陆西地区火山岩的研究中发现, 溶蚀作用是喷溢相碱性火山岩中优质储集层形成的主要因素,并对溶蚀机理、酸性流体的来源进行了探究。认为无机酸与有机酸的溶蚀机理不同, 无机酸主要靠带走K+、Na+等阳离子实现溶蚀, 而有机酸主要靠增加Al3+的活度实现溶蚀, 指出酸性流体主要来自火山脱气、沿深大断裂上溢的深部酸性流体和有机质, 据此, 推断出火山口附近、深大断裂两侧和生烃凹陷附近将是勘探有利区带。在陆西地区, 最有利区域位于夏盐2 井至达1 井一线和石西地区, 次级有利区为夏盐1 井到石南4 井一线和玛东2 井到陆2 井一线。

关键词: 准噶尔盆地, 溶解作用, 碱性, 火山岩, 储集层

Abstract: The study on volcanic rocks from Luxi area in Junggar basin shows that the dissolution of the alkaline volcanic rocks of overflow facies is a key factor to form high-quality reservoir. The discussion of the origin of acidic fluids and mechanism of dissolution suggests that there are different dissolution mechanisms between inorganic acids and organic acids. The inorganic acids mainly take K+, Na+ and other ions away to have a dissolution, however, the organic acids largely depend on increasing the activity of Al3+ for it. The acidic fluids for dissolution were derived from volcanic degasification, fluids overflowed upwards along the deep faults and organic matter. It is concluded that the adjacent to craters, lateral of deep faults and hydrocarbon-generation sags would be the favorable zone for petroleum prospecting. In Luxi area, the most potential zones could be found in line from Well Xiayan-2 to Well Da-1 and Shixi area. In addition, the more potential zones place in line from Well Xiayan-1 to Well Shinan-4 and from Well Madong-2 to Well Lu-2.

Key words: dissolution, alkaline volcanic rock, premium reservoir, Luxi area

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