油气藏评价与开发 ›› 2024, Vol. 14 ›› Issue (4): 549-559.doi: 10.13809/j.cnki.cn32-1825/te.2024.04.004

• 方法理论 • 上一篇    下一篇

深层—超深层走滑断裂带储层流体来源与油气成藏过程研究——以塔里木盆地富满油田为例

薛一帆1(),文志刚1,黄亚浩1(),张银涛2,乔占峰3,张天付3,李梦勤2,王彭2   

  1. 1.长江大学油气地球化学与环境湖北省重点实验室,湖北 武汉430100
    2.中国石油塔里木油田分公司勘探开发研究院,新疆 库尔勒841000
    3.中国石油杭州地质研究院, 浙江 杭州310023
  • 收稿日期:2024-02-19 出版日期:2024-08-26 发布日期:2024-09-10
  • 通讯作者: 黄亚浩(1990—),男,博士,副教授,主要从事油气成藏机理研究。地址:湖北省武汉市蔡甸区大学城路111号长江大学,邮政编码:430100。E-mail:hyhtr08916@163.com
  • 作者简介:薛一帆(2003—),男,在读硕士研究生,主要从事油气成藏机理研究。地址:湖北省武汉市蔡甸区大学城路111号长江大学,邮政编码:430100。E-mail:xyf257248@163.com
  • 基金资助:
    国家自然科学基金项目“深层碳酸盐岩储层流体活动示踪油气差异成藏效应研究——以塔里木盆地富满油田为例”(42302154);中国石油碳酸盐岩储层重点实验室开放基金项目“深层走滑断裂带储层流体活动差异性及对油气成藏响应研究——以塔里木盆地富满地区为例”(RIPED-2022-JS-2382)

Study on reservoir fluid source and hydrocarbon accumulation process in deep to ultra-deep strike-slip fault zone: A case study of Fuman Oilfield, Tarim Basin

XUE Yifan1(),WEN Zhigang1,HUANG Yahao1(),ZHANG Yintao2,QIAO Zhanfeng3,ZHANG Tianfu3,LI Mengqin2,WANG Peng2   

  1. 1. Hubei Key Laboratory of Petroleum Geochemistry and Environment, Yangtze University, Wuhan, Hubei 430100, China
    2. Research Institute of Exploration and Development, Tarim Oilfield Company, PetroChina, Korla, Xinjiang 841000, China
    3. PetroChina Hangzhou Research Institute of Geology, Hangzhou, Zhejiang 310023, China
  • Received:2024-02-19 Online:2024-08-26 Published:2024-09-10

摘要:

以富满油田北部走滑断裂带深部储层孔洞缝充填脉体为研究对象,基于脉体的岩相学特征、微区稀土元素和Sr(锶)同位素、油包裹体荧光光谱、显微热力学和碳酸盐岩U-Pb同位素定年进行分析。结果表明:富满油田北部走滑断裂带发育2期方解石脉体,脉体来源于中下奥陶统海源地层水,未见氧化性流体侵入,表明深层—超深层油气晚期具有良好的封闭性。通过包裹体测温投点埋藏史结合碳酸盐岩低U-Pb同位素定年技术,厘定塔里木盆地富满油田北部走滑断裂带深层奥陶系存在3期油气充注过程,分别对应于距今(459±7.2) Ma(加里东中期)、(348±18) Ma(海西早期)和268 Ma(海西晚期),富满油田北部深层—超深层碳酸盐岩油气成藏关键期为海西早期,且油气充注与断裂活动有较好的对应关系。

关键词: 塔里木盆地, 富满油田, 油气成藏, 流体包裹体, U-Pb同位素定年, 流体演化

Abstract:

The study of the filling veins in deep reservoirs within the strike-slip fault zone in the north of Fuman Oilfield utilizes a range of methods including petrographic characteristics, analysis of rare earth elements andSr(strontium) isotopes, fluorescence spectra of oil inclusions, microscopic thermodynamics, and U-Pb isotopic dating of carbonate rocks. The findings reveal two stages of calcite vein formation in this area. These veins originate from the formation water of the middle and Lower Ordovician sources, with no evidence of oxidizing fluid intrusion, suggesting that the deep to ultra-deep oil and gas reserves have maintained good sealing properties in later stages. Furthermore, based on the burial history deduced from inclusions and low U-Pb isotope dates from carbonate rocks, it has been determined that there are three distinct stages of hydrocarbon charging in the deep Ordovician strata of the northern strike-slip fault zone in the Tarim Basin. These stages correspond to (459±7.2) Ma(middle Caledonian), (348±18) Ma(early Hercynian), and 268 Ma(late Hercynian). It is noted that the early Hercynian period was the key phase for hydrocarbon accumulation in the deep and ultra-deep carbonate rocks in the north of Fuman Oilfield, with a significant correlation observed between oil and gas charging and fault activity.

Key words: Tarim Basin, Fuman Oilfield, hydrocarbon accumulation process, fluid inclusion, U-Pb isotope dating, fluid evolution

中图分类号: 

  • TE122