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古地理学报 ›› 2015, Vol. 17 ›› Issue (1): 81-90. doi: 10.7605/gdlxb.2015.01.007

• 构造古地理学及古构造 • 上一篇    下一篇

准噶尔盆地地层剥蚀厚度定量恢复方法研究与应用:以克拉玛依油田八区二叠系下乌尔禾组为例

吴涛1,2, 吴采西1, 戚艳平1, 姚爱国1, 张顺存2, 徐 洋3, 史基安2   

  1. 1 中国石油新疆油田公司勘探开发研究院, 新疆克拉玛依 834000
    2 甘肃省油气资源研究重点实验室/中国科学院油气资源研究重点实验室, 甘肃兰州 730000
    3 中国石油杭州地质研究院, 浙江杭州 310023
  • 收稿日期:2014-08-26 修回日期:2014-11-06 出版日期:2015-02-01 发布日期:2015-02-01
  • 作者简介:吴涛, 男, 1981年生, 博士, 2014年毕业于中国科学院地质与地球物理所兰州油气资源研究中心, 获博士学位, 现为中国石油新疆油田公司勘探开发研究院工程师, 主要研究方向为储集层沉积学。E-mail: wutao05@mails.ucas.ac.cn。
  • 基金资助:

    国家重点基础研究发展计划(973计划)“中国西部叠合盆地有效碎屑岩储集层成因机制与发育模式”(编号:2011CB201104),国家科技重大专项“准噶尔盆地岩性地层油气藏富集规律与目标评价”(编号:2011ZX05000-01-06)联合资助

Quantitative resumption method of stratum denudation thickness and its application in Junggar Basin: A case study on the Permian Lower Urho Formation in Block 8 of Karamay Oilfield

Wu Tao1,2, Wu Caixi1, Qi Yanping1, Yao Aiguo1, Zhang Shuncun2, Xu Yang3, Shi Ji-an2   

  1. 1.Research Institute of Exploration and Development, Xinjiang Oilfield Company, PetroChina, Karamay834000, Xinjiang
    2.Key Laboratory of Petroleum Resources, Gansu Province/Key Laboratory of Petroleum Resources Research, Chinese Academy of Sciences, Lanzhou730000, Gansu
    3.PetroChina Hangzhou Research Institute of Geology, Hangzhou 310023, Zhejiang
  • Received:2014-08-26 Revised:2014-11-06 Online:2015-02-01 Published:2015-02-01
  • About author:Wu Tao, born in 1981, graduated from Lanzhou Center for Oil and Gas Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences and obtained his Ph.D. degree in 2014. Now he is an engineer of Research Institute of Exploration and Development, Xinjiang Oilfield Company, PetroChina, and is engaged in reservoir sedimentology. E-mail: wutao05@mails.ucas.ac.cn.

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摘要：

准噶尔盆地克拉玛依油田八区二叠系下乌尔禾组逐层超覆,后期受强烈冲断作用而抬升,并遭受强烈剥蚀。恢复其地层古厚度不仅能够重建该区埋藏演化史,也是油气资源定量评价的重要基础。然而,研究区勘探程度低,传统剥蚀厚度计算方法受限。针对实际地质条件与现有资料,文中利用地震地层趋势法和沉积层序分析法,在准确圈定剥蚀边界的基础上,根据邻层厚度比值法和参考层厚度变化率法,计算出下乌尔禾组三段剥蚀厚度。在此基础上,通过分析下乌尔禾组三段关键时期的沉积演化特征,建立了研究区扇三角洲沉积模式,确定了扇三角洲前缘储集相带展布范围,为今后的油气勘探提供了可靠的地质依据。

关键词: 剥蚀厚度, 定量恢复, 沉积演化, 下乌尔禾组, 二叠系, 克拉玛依油田, 准噶尔盆地

Abstract:

The Permian Lower Urho Formation overlapped layer by layer in the Block 8 of Karamay Oilfield, Junggar Basin. It suffered from intense denudation because of the late strong thrusting and uplifting. Therefore,resuming stratum palaeothickness not only can rebuild the burial and evolution history of the study area,but also is an important base of quantitative estimation of petroleum resources. However,traditional calculation method of denudation thickness is constrained by low degree of exploration. According to actual data and geological conditions of the study area,a suite of quantitative calculation method is probed out. Based on a new way of seismic trend thickness integrated with sedimentary sequences analysis,denudation boundary of the Permian Lower Urho Formation has been outlined. A composite method of the thickness ratio of nearby layers and the change ratio of reference layer thickness have been applied in calculating true denudation thickness of the Member 3 of Lower Urho Formation. By analyzing evolution characteristics of the Member 3 of Lower Urho Formation in the key sedimentary periods,a sedimentary model of fan delta has been established in the study area. The distribution range of delta front subfacies is also depicted at the same time,which can provide reliable geological evidence for the future petroleum exploration.

Key words: denudation thickness, quantitative resumption, sedimentary evolution, Lower Urho Formation, Permian, Karamay Oilfield, Junggar Basin

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