地学前缘 ›› 2010, Vol. 17 ›› Issue (5): 306-314.

• 论文 • 上一篇    下一篇

酒西盆地中新生代碎屑组分特征及指示意义

方世虎,宋岩,赵孟军,袁庆东,杭伟4,洪峰   

  1. 1中国石油勘探开发研究院, 北京 100083
    2中国石油天然气集团公司 盆地构造与油气成藏重点实验室, 北京 100083
    3提高石油采收率国家重点实验室, 北京 100083
    4中国石油 玉门油田分公司, 甘肃 酒泉 735000
  • 收稿日期:2010-03-31 修回日期:2010-05-26 出版日期:2010-09-15 发布日期:2010-10-22
  • 作者简介:方世虎(1975—),男,博士,高级工程师,主要从事盆地构造与油气成藏综合研究。E-ail: shfang@pku.org.cn
  • 基金资助:

    国家油气重大专项(2008ZX05003002);中国石油集团石油科技中青年创新基金项目(07E1028);国家自然科学基金项目(40802047)

Clastic composition of MesozoicCenozoic reservoirs in the western Jiuquan Basin: Implications for evolution of basinrange pattern and hydrocarbon accumulation.

  1. 1PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China
    2Key Laboratory of Basin Structure and Petroleum Accumulation, CNPC, Beijing 100083, China
    3State Key Laboratory of EOR, Beijing 100083, China
    4Yumen Oilfield, PetroChina, Jiuquan 735000, China
  • Received:2010-03-31 Revised:2010-05-26 Online:2010-09-15 Published:2010-10-22

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摘要：

通过岩石碎屑成分分析,研究酒西盆地砂砾岩储集层沉积碎屑成分特征对物源属性、盆山格局演化及油气成藏特征的指示意义。研究表明,酒西盆地下白垩统下沟组砂岩成分成熟度低,物源构造属性以再旋回造山带和部分岩浆弧为特征,物源岩石类型主要为中酸性岩浆岩和变质岩(沉积岩碎屑极少),岩石成分及其组合显示盆地东、西部的物源差异明显;古近系白杨河组在岩石成分、岩屑组成上与下白垩统下沟组砂岩有较大不同,显示物源属性的明显改变。物源属性的改变在一定程度上反映构造格局分异、盆-格局的演变历程,控制了酒西盆地内油气富集和晚期成藏特征。碎屑成分特征在一定程度上决定了储集层的储集空间类型及裂缝发育规律,值得进一步深入研究。

关键词: 酒西盆地, 砂砾岩储集层, 岩屑组分, 盆-格局, 油气成藏

Abstract:

 The study of detrital composition of sandstones is an important method for understanding provenance types, basinrange evolution and tectonic attributes. The sandstone framework grains of the Xiagou Formation of Lower Cretaceous in western Jiuquan Basin generally show low detrital maturity, characterized by source from recycled orogen and part of magmaticarc. The Xiagou Formation mainly consists of provenances of metamorphic and intermediate acidic volcanic (few sedimentary rocks). The detrital compositions show obvious differences in provenance between the western and eastern area of western Jiuquan Basin. The detrital composition of Baiyanghe Formation is very different from that of Xiagou Formation, implying the changes in provenance attribute. Combined with previous research results, the changes in provenance attribute reflect the evolution of tectonic diversity and basinrange pattern, which control the oil and gas enrichment and the late hydrocarbon accumulation in western Jiuquan Basin. The detrital composition that controls the reservoir space and development law of fractures is worthy of further study.

Key words: western Jiuquan Basin, sandstoneconglomerate reservoir, detrital composition, basinrange pattern, hydrocarbon accumulation

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