石油学报 ›› 2022, Vol. 43 ›› Issue (4): 494-506.DOI: 10.7623/syxb202204004

• 地质勘探 • 上一篇    下一篇

准噶尔盆地四棵树凹陷构造应力场与构造变形解析

吴林1,2,3, 朱明4, 冯兴强1,2,3, 冀冬生4, 周磊1,2,3, 刘圣鑫1,2,3, 张林炎1,2,3, 谭元隆1,2,3, 钱竹良1,2,3, 杨珍5   

  1. 1. 中国地质科学院地质力学研究所 北京 100081;
    2. 自然资源部古地磁与古构造重建重点实验室 北京 100081;
    3. 中国地质调查局油气地质力学重点实验室 北京 100081;
    4. 中国石油新疆油田公司勘探开发研究院 新疆乌鲁木齐 830013;
    5. 中国石油新疆油田公司石西油田作业区 新疆克拉玛依 834000
  • 收稿日期:2021-09-24 修回日期:2021-12-11 发布日期:2022-04-30
  • 通讯作者: 冯兴强,男,1975年11月生,2003年获中国科学院地质与地球物理研究所博士学位,现为中国地质科学院地质力学研究所教授级高级工程师,主要从事石油地质及油气地质力学研究工作。Email:286484521@qq.com
  • 作者简介:吴林,男,1987年7月生,2015年获中国石油大学(华东)博士学位,现为中国地质科学院地质力学研究所高级工程师,主要从事含油气盆地构造分析工作。Email:wulin50@mail.cgs.gov.cn
  • 基金资助:
    国家自然科学基金项目(NO.41902158)资助。

Interpretation on tectonic stress and deformation of Sikeshu sag in Junggar Basin

Wu Lin1,2,3, Zhu Ming4, Feng Xingqiang1,2,3, Ji Dongsheng4, Zhou Lei1,2,3, Liu Shengxin1,2,3, Zhang Linyan1,2,3, Tan Yuanlong1,2,3, Qian Zhuliang1,2,3, Yang Zhen5   

  1. 1. China Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China;
    2. Key Laboratory of Paleomagnetism and Paleotectonic Reconstruction, Ministry of Natural resources, Beijing 100081, China;
    3. Key Laboratory of Petroleum Geomechanics, China Geological Survey, Beijing 100081, China;
    4. Research Institute of Exploration and Development, PetroChina Xinjiang Oilfield Company, Xinjiang Urumqi 830013, China;
    5. Shixi Field Operation District, PetroChina Xinjiang Oilfield Company, Xinjiang Karamay 834000, China
  • Received:2021-09-24 Revised:2021-12-11 Published:2022-04-30
  • Contact: 冯兴强,男,1975年11月生,2003年获中国科学院地质与地球物理研究所博士学位,现为中国地质科学院地质力学研究所教授级高级工程师,主要从事石油地质及油气地质力学研究工作。Email:286484521@qq.com

摘要: 准噶尔盆地南缘四棵树凹陷高探1井的中生界油气勘探已获得重大突破,深入解析该地区深层致密砂岩的构造变形显得至关重要。综合野外、岩心、测井和地震等数据,利用地质调查与有限元数值模拟方法查明了四棵树凹陷的构造应力环境,明确了构造应力场对构造变形的控制作用。研究表明,四棵树凹陷现今的最大水平主应力总体呈SN向,具有分带性。在北天山西段、托斯台构造带和高泉构造带等地区,最大水平主应力方位呈NNW向;在艾卡构造带和车排子凸起等地区,最大水平主应力方位呈NNE向或NE向。晚喜马拉雅期以来,NNW向构造应力由北天山地区向四棵树凹陷内部逐渐传递,受其控制的凹陷内构造变形也沿NNW向传播扩展。高泉背斜清水河组的构造应力场数值模拟表明:研究区的最大水平主应力为80~170 MPa;构造应力在背斜南部、中部的断层附近集中,向北则减小;近EW走向断层附近的构造应力明显大于NNW (或近SN)走向断层附近的构造应力,总体显示高泉背斜处于压扭应力环境。构造应力场控制了高泉背斜的裂缝发育和展布,裂缝走向与最大水平主应力方向一致或呈小角度相交,且断层附近或背斜核部裂缝较发育。高探1井中发育的构造裂缝可能是该井取得高产的重要原因之一。

关键词: 构造应力场, 构造变形, 裂缝, 有限元数值模拟, 四棵树凹陷, 准噶尔盆地

Abstract: A great breakthough has been achieved in Mesozoic hydrocarbon exploration in Well Gaotan1 of Sikeshu sag in the southwest Junggar Basin, and it is crucial to further investigate the tectonic deformation of deep tight sandstone in this area. Based on the data of outcrop, core, logging and earthquake, and the comprehensive use of geological survey and numerical simulation methods, this paper makes clear the tectonic stress field of Sikeshu sag and its control on deep tectonic deformation. The research shows that the azimuth of maximum horizontal principal stress in Sikeshu sag is generally NS-trending with a zonal distribution. The azimuth of maximum horizontal principal stress shows NNW-trending in the western part of North Tianshan Mountain, Tuositai and Gaoquan tectonic belts, but NNE or NE-trending in the Aika tectonic belt and Chepaizi uplift. Since the Late Himalayan period, the NNW-trending tectonic stress has gradually transferred from the North Tianshan to the Sikeshu sag, and the tectonic deformation controlled by the stress also propagates along the NNW direction. According to numerical simulation of the tectonic stress field of Qingshuihe Formation in Gaoquan anticline, the maximum horizontal principal stress ranges from 80 MPa to 170 MPa in the study area. The stress is concentrated near the southern and central faults and decreased to the northern part. The maximum principal stress of EW-trending faults is significantly greater than that of NNW or NS-trending faults, indicating that the Gaoquan anticline is under the transpressional stress environment. The tectonic stress field controls the development of fractures. The strike of fracture is consistent with the azimuth of the maximum horizontal principal stress, or intersects with it at a small angle. Structural fractures are more developed near the fault or in the core of anticline. Therefore, the structural fractures in Well Gaotan1 may be one of the important factors for the high oil and gas production.

Key words: tectonic stress field, tectonic deformation, fracture, finite element numerical simulation, Sikeshu sag, Junggar Basin

中图分类号: