中国石油勘探 ›› 2020, Vol. 25 ›› Issue (1): 102-111.DOI: 10.3969/j.issn.1672-7703.2020.01.010

• 石油地质 • 上一篇    下一篇

塔里木盆地顺北超深断溶体油藏特征与启示

漆立新   

  1. 中国石化西北油田分公司
  • 收稿日期:2019-06-26 修回日期:2019-11-26 出版日期:2020-01-15 发布日期:2019-12-31
  • 基金资助:
    国家科技重大专项“塔里木—鄂尔多斯盆地海相碳酸盐岩层系大中型油气田形成规律与勘探评价”(2017ZX05005-002);中国石化科技部项目群“塔里木盆地古生界大中型油气田目标评价与勘探技术”(P16088)。

Characteristics and inspiration of ultra-deep fault-karst reservoir in the Shunbei area of the Tarim Basin

Qi Lixin   

  1. SINOPEC Northwest Oilfield Company
  • Received:2019-06-26 Revised:2019-11-26 Online:2020-01-15 Published:2019-12-31
  • Supported by:
     

摘要: 近年来,塔里木盆地顺托果勒低隆起发现了10亿吨级的新类型油藏——顺北超深断溶体油藏。通过深化顺北地区油气成藏地质条件认识,突破了构造低部位岩溶储层欠发育的限制,提出走滑断裂带构造破裂作用为主的叠加后期埋藏流体改造也可形成规模储层。走滑断裂带多期活动对储层改造、圈闭形成和油气运聚具有重要的控制作用,建立了顺北超深断溶体油气藏“寒武纪多期供烃、深埋断溶成储、原地垂向输导、晚期成藏为主、走滑断裂控富”成藏模式,初步提出了顺北断溶体油藏富集的主控因素。顺北超深断溶体油藏作为一种新类型油藏,丰富了海相碳酸盐岩油气成藏理论,展现了超深层海相碳酸盐岩巨大的勘探潜力,是盆地未来油气增储的重点领域。

 

关键词: 塔里木盆地, 顺北, 断溶体油藏, 奥陶系

Abstract: In recent years, a new type of oil reservoir, with reserves of 1 billion tons, has been discovered in the low uplift of Shuntuoguole in the Tarim Basin - ultra-deep fault-karst oil reservoir in the Shunbei area. By deepening understanding of the geological conditions for oil and gas accumulation in the Shunbei area, the constraint on development represented by the fact that karst reservoirs had not been developed in the lower structure positions has been broken. It is also proposed that large-scale reservoirs can be formed by later superimposed buried fluid reformation, mainly due to structure fracturing of strike slip fault zones. The multi-stage activities of strike slip fault zones play an important role in controlling reservoir reformation, trap formation and hydrocarbon migration and accumulation. The hydrocarbon accumulation mode of "multi-stage hydrocarbon supply in Cambrian, deep buried fault-karst reservoir, in-situ vertical migration, mainly late stage accumulation, strike slip faults controlling enrichment" has been established for ultra-deep fault-karst reservoir in the Shunbei area. The main controlling factors of enrichment of the fault-karst reservoir have been presented. As a new type of reservoir, ultra-deep fault-karst reservoir has extended the theory of hydrocarbon accumulation in marine carbonates, confirms the great exploration potential of ultra-deep marine carbonate formations, and is the key field for reserves increase in the future.

中图分类号: