石油勘探与开发 >

2022 , Vol. 49 >Issue 2: 249 - 261

DOI: https://doi.org/10.11698/PED.2022.02.04

油气勘探

塔里木盆地北部地区超深断控油藏关键成藏期

  • 杨率 ,
  • 邬光辉 ,
  • 朱永峰 ,
  • 张银涛 ,
  • 赵星星 ,
  • 鲁子野 ,
  • 张宝收
展开
  • 1.西南石油大学地球科学与技术学院,成都 610500;
    2.中国石油天然气集团有限公司碳酸盐岩储层重点实验室西南石油大学研究分室,成都 610500;
    3.中国石油塔里木油田公司,新疆库尔勒 841000;
    4.中国石油西南油气田公司,成都 610051
杨率（1992-）,男,四川南充人,现为西南石油大学在读博士研究生,主要从事构造地质与石油地质研究。地址：四川省成都市新都区新都大道8号,西南石油大学地球科学与技术学院,邮政编码：610500。E-mail:yangshuaiys@126.com

收稿日期: 2021-09-04

  网络出版日期: 2022-03-16

基金资助

国家自然科学基金（91955204）; 中国石油-西南石油大学创新联合体科技合作项目（2020CX010101）

收起

Key oil accumulation periods of ultra-deep fault-controlled oil reservoir in northern Tarim Basin, NW China

  • YANG Shuai ,
  • WU Guanghui ,
  • ZHU Yongfeng ,
  • ZHANG Yintao ,
  • ZHAO Xingxing ,
  • LU Ziye ,
  • ZHANG Baoshou
Expand
  • 1. School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China;
    2. PetroChina Key Laboratory of Carbonate Reservoir, Southwest Petroleum University, Chengdu 610500, China;
    3. Tarim Oilfield Company, PetroChina, Korla 841000, China;
    4. Southwest Oil and Gas Field Company, PetroChina, Chengdu 610051, China

Received date: 2021-09-04

  Online published: 2022-03-16

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摘要

塔里木盆地北部地区奥陶系碳酸盐岩发现了埋深大于6 000 m的断控型特大油田,关键成藏期厘定对油气成藏研究与勘探开发具有重要意义。在岩相学精细分析基础上,开展12口井断裂充填方解石的流体包裹体组合（FIA）测试分析,并结合烃源岩及其生油期、断裂与圈闭形成期研究断控油藏成藏期。结果表明,①FIA类型多样,主要存在坳陷区黄色荧光与隆起区黄绿色荧光2类不同成熟度油包裹体,指示2期石油充注;②FIA中盐水包裹体均一温度多遭受升温作用的影响,与油包裹体共生的盐水包裹体最小温度值更接近成藏期温度;③黄色荧光的FIA都检测到低于50 ℃的均一温度,黄绿色荧光的FIA均检测到70~90 ℃的温度数据,揭示中晚加里东期与晚海西期的2期石油成藏期;④中晚奥陶世为走滑断裂、奥陶系碳酸盐岩缝洞体储集层与圈闭的关键形成期;⑤下寒武统主力烃源岩的生油高峰期为晚奥陶世,坳陷区以晚奥陶世成藏为主,隆起区以早二叠世成藏为主。研究认为,塔里木盆地北部地区超深断控油藏关键成藏期为加里东晚期,坳陷区保存了加里东期的原生古油藏,隆起区发育晚海西期从坳陷区调整过来的次生油藏;保存条件是该区走滑断裂带石油富集的关键,阿满过渡带坳陷区油气更富集、勘探开发潜力更大。

关键词： 超深层; 走滑断裂; 断控油藏; 成藏期; 成藏演化; 流体包裹体; 富满油田; 塔里木盆地

本文引用格式

杨率 , 邬光辉 , 朱永峰 , 张银涛 , 赵星星 , 鲁子野 , 张宝收 . 塔里木盆地北部地区超深断控油藏关键成藏期[J]. 石油勘探与开发, 2022 , 49(2) : 249 -261 . DOI: 10.11698/PED.2022.02.04

Abstract

A giant fault-controlled oilfield has been found in the ultra-deep (greater than 6000 m) Ordovician carbonate strata in the northern Tarim Basin. It is of great significance for hydrocarbon accumulation study and oil exploitation to determine the key oil accumulation periods. Based on detailed petrographic analysis, fluid inclusion association (FIA) in calcite samples filling in fractures from 12 wells were analyzed, and key accumulation periods of the strike-slip fault-controlled oilfield was studied by combining oil generation periods of the source rocks, formation periods of the fault and traps, and the fluid inclusion data. (1) There are multiple types of FIA, among them, two types of oil inclusions, the type with yellow fluorescence from the depression area and the type with yellow-green fluorescence from the uplift area with different maturities indicate two oil charging stages. (2) The homogenization temperature of the brine inclusions in FIA is mostly affected by temperature rises, and the minimum temperature of brine inclusions symbiotic with oil inclusions is closer to the reservoir temperature during its forming period. (3) FIA with yellow fluorescence all have homogenization temperatures below 50℃, while the FIA with yellow-green fluorescence have homogenization temperatures of 70-90℃ tested, suggesting two oil accumulation stages in Middle-Late Caledonian and Late Hercynian. (4) The Middle-Late Ordovician is the key formation period of the strike-slip fault, fracture-cave reservoir and trap there. (5) The oil generation peak of the main source rock of the Lower Cambrian is in the Late Ordovician, and the oil accumulation stage is mainly the Late Ordovician in the depression area, but is mainly the Early Permian in the uplift area. The key oil accumulation period of the strike-slip fault-controlled reservoirs is the Late Caledonian, the depression area has preserved the primary oil reservoirs formed in the Caledonian, while the uplift area has secondary oil reservoirs adjusted from the depression area during the Late Hercynian. Oil reservoir preservation conditions are the key factor for oil enrichment in the strike-slip fault zone of northern Tarim, and the Aman transition zone in the depression is richer in oil and gas and has greater potential for exploration and development.

Key words： ultra-deep strata; strike-slip fault-controlled oil reservoir; accumulation period; accumulation evolution; fluid inclusion; Fuman oilfield; Tarim Basin

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