查干凹陷中、新生代热史及烃源岩热演化

左银辉; 马维民; 邓已寻; 郝情情; 李新军; 郭俊梅; 冉庆; 汪立蓉

doi:10.3799/dqkx.2013.055

查干凹陷中、新生代热史及烃源岩热演化

doi: 10.3799/dqkx.2013.055

左银辉^{1, 2,},
马维民¹,
邓已寻^{1, 3},
郝情情⁴,
李新军¹,
郭俊梅¹,
冉庆⁵,
汪立蓉¹

1.
中国石化中原油田分公司勘探开发科学研究院, 河南濮阳 457001
2.
中国石油大学油气资源与探测国家重点实验室, 北京 102249
3.
中国地质大学能源学院, 北京 100083
4.
中国冶金地质总局矿产资源研究院, 北京 100025
5.
中国石化中原油田分公司地球物理测井公司, 河南濮阳 457001

基金项目:

国家自然科学基金 91114202

国家自然科学基金 90914006

重庆市自然基金重点项目 CSTC2012jjB90007

详细信息

作者简介:
左银辉(1980-), 男, 博士, 主要从事沉积盆地热体制和地球动力学的研究.E-mail: zuoyinhui@tom.com

中图分类号: P314
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出版历程
- 收稿日期: 2012-02-02
- 刊出日期: 2013-05-15

Mesozoic and Cenozoic Thermal History and Source Rock Thermal Evolution History in the Chagan Sag, Inner Mongolia

1.
Research Institute of Exploration and Development, Zhongyuan Oilfield, SINOPEC, Puyang 457001, China
2.
State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum, Beijing 102249, China
3.
School of Energy Resources, China University of Geosciences, Beijing 100083, China
4.
Institute of Mineral Resources Research, China Metallurgical Geology Bureau, Beijing 100025, China
5.
Geophysical Logging Company, Zhongyuan Oilfield, SINOPEC, Puyang 457001, China

摘要

摘要: 查干凹陷是内蒙古银-额盆地最具勘探潜力的凹陷, 为了揭示查干凹陷中、新生代热史及烃源岩热演化历史, 首先利用9口井的镜质体反射率数据恢复了查干凹陷中、新生代热史, 结果显示查干凹陷在早白垩世巴音戈壁组沉积开始至银根组沉积末期, 地温梯度逐渐增加, 且到银根组沉积末期达到最大, 为50~58 ℃/km; 自晚白垩世乌兰苏海组沉积开始至今, 地温梯度逐渐下降, 现今地温梯度仅为31~34 ℃/km.再以热史为基础, 结合沉积和构造发育史及烃源岩地球化学资料, 模拟了查干凹陷9口井3套烃源岩的成熟度演化历史, 模拟结果显示查干凹陷烃源岩成熟度演化受古地温控制, 3套烃源岩成熟度都在早白垩世晚期达到最大.
- 银-额盆地 /
- 查干凹陷 /
- 热史 /
- 成熟度史 /
- 沉积 /
- 能源地质
Abstract: The Chagan sag has the greatest potential for oil and gas exploration among other sags in the Yin'gen-Ejinaqi basin. To reveal the Mesozoic and Cenozoic thermal history and source rock thermal evolution history in the Chagan sag, the thermal history was modeled on basis of vitrinite reflectance data of 9 wells. The modeled results show the thermal gradients increased gradually from the Early Cretaceous Bayin'gebi Formation to the end of the Yin'gen Formation, and the thermal gradients reached maximum values(50-58 ℃/km) at the end of the Yingen Formation.Then the thermal gradients decreased gradually from the Late Cretaceous Wulansuhai Formation to the present day, and the thermal gradients is only 31-34 ℃/km in the present day. Meanwhile, based on the above thermal gradient data, with combination of the depositional and tectonic development history and geochemical parameters of source rocks, maturation histories of 3 sets of source rocks of 9 wells were modeled. The modeled results show the maturation histories were controlled by the palaeogeothermal, and the maturation of 3 sets of source rocks reached maximum values in the late period of the Early Cretaceous.
- Yin'gen-Ejinaqi basin /
- Chagan sag /
- thermal history /
- maturation history /
- sedimendation /
- petroleum geology

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图 1 查干凹陷构造划分及井位

Fig. 1. Structural division and well locations in the Chagan sag

下载: 全尺寸图片幻灯片

图 2 查干凹陷镜质体反射率数据与深度的关系(井位见图 1)

虚线范围内的数据受苏红图组火山活动的影响, 且影响程度不一致, 导致同一深度镜质体反射率相差较大, 不能用于热史模拟

Fig. 2. Vitrinite reflectance data versus depth in the Chagan sag

下载: 全尺寸图片幻灯片

图 3 力1井埋藏史、热史及生烃史模拟结果

Fig. 3. The modeled results of burial, thermal and hydrocarbon generation history of well Li 1

下载: 全尺寸图片幻灯片

图 4 查干凹陷典型井热演化历史

Fig. 4. Thermal evolution history of typical wells in the Chagan sag

下载: 全尺寸图片幻灯片

图 5 中央构造带典型井烃源岩成熟度演化历史

Fig. 5. Maturation history of typical wells in the central tectonic zone

下载: 全尺寸图片幻灯片

图 6 乌力吉断鼻构造带典型井烃源系成熟度演化历史

Fig. 6. Maturation history of typical wells in the Wuliji fault-nose tectonic zone

下载: 全尺寸图片幻灯片

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