库车褶皱冲断带克拉苏三角带及其油气潜力

杨明慧; 金之钧; 吕修祥; 孙冬胜

库车褶皱冲断带克拉苏三角带及其油气潜力

石油大学盆地与油藏研究中心, 北京 102249

详细信息

作者简介:
杨明慧(1962-), 男, 副教授, 1998年毕业于中国地质大学(武汉), 获理学博士学位, 目前主要从事盆地分析方面的研究工作

中图分类号: P618.130.2
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出版历程
- 收稿日期: 2002-08-12
- 刊出日期: 2002-11-25

Kelasu Triangle Zone and Its Hydrocarbon Potential in Kuqa Thrust-and-Fold Belts, Tarim Basin

Basin & Reservoir Research Center, University of Petroleum, Beijing 102249, China

摘要

摘要: 塔里木盆地库车褶皱冲断带克拉苏构造带在古近系膏盐岩之下发育克拉苏三角带.克拉苏三角带发育时代约在中新世中期, 位于古近系膏盐岩和侏罗系煤系之间, 为Ⅱ类三角带.上新世时, 该三角带底部被突破, 库车褶皱冲断带前缘扩展至秋里塔格构造.克拉苏三角带的发展与超压封套的发生有关; 突破层位在伊-蒙混层向伊利石的转换边界.克拉苏三角带深层是有利的油气勘探目标.
- 克拉苏三角带 /
- 演化 /
- 油气勘探 /
- 库车褶皱冲断带 /
- 塔里木盆地
Abstract: The Kelasu triangle zone occurs under the Paleogene evaporites in Kelasu anticline zone of Kuqa thrust-and-fold belts, Tarim basin (Northwest China). The triangle zone was about to start originally in the middle Miocene, developed between the Paleogene evaporites and the Jurassic coal-bearing strata, and fell under Ⅱ-type of triangle zones. While in the Pliocene, the Kelasu triangle zone was broken through at the bottom. The tectonic fronts of the Kuqa thrust-and-fold belts expanded to the Qiuli Tagh anticline zone. It is discovered that the development of the Kelasu triangle zone is related to the evolution of an overpressure envelop, and the broken layer is assumed to coincide with a mechanical boundary related to the smectite to illite transition lain under the Paleogene evaporites. The deep traps of the Kelasu triangle zone are potential targets that should be distinguished from strike-slip faults such as transfer zones for hydrocarbon exploration.
- Kelasu triangle zone /
- development /
- hydrocarbon exploration /
- Kuqa foreland thrust-and-fold belt /
- Tarim basin

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图 1 三角带构造分类

Fig. 1. Classification of triangle zones

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图 2 库车前陆褶皱冲断带构造纲要

1.南天山造山带; 2.凸起; 3.研究区; 4.构造单元分界线; 5.褶皱; 6.调节构造

Fig. 2. Schematic map of Kuqa foreland thrust-and-fold belts

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图 3 克拉苏三角带构造解释

(地震剖面BC95-198.5, 位置见图 2)

Fig. 3. Tectonic interpretation of Kelasu triangle zone

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图 4 改进的楔冲作用模式^[5]

Fig. 4. Model of improved tectonic wedging^[5]

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图 5 克参1井蒙-伊转换界线与滑脱层位关系

Fig. 5. Smectite-illite transition in KC1 well and its relationship with decollement layer

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表 1 库车前陆褶皱冲断带构造扩展年代^[20]

Table 1. Tectonic expanded ages of Kuqa foreland thrust-and-fold belt^[20]

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