地学前缘 ›› 2023, Vol. 30 ›› Issue (1): 187-198.DOI: 10.13745/j.esf.sf.2022.8.33

• 陆相页岩油勘探开发理论与实践 • 上一篇    下一篇

从能耗比论低熟富有机质页岩原位改质转化的经济可行性及增效途径

卢双舫1,2,3(), 王峻3, 李文镖1,2(), 曹怿昕3, 陈方文3, 李吉君3, 薛海涛3, 王民3   

  1. 1.东北石油大学 三亚海洋油气研究院, 海南 三亚 572025
    2.东北石油大学 陆相页岩油气成藏及高效开发教育部重点实验室, 黑龙江 大庆 163318
    3.中国石油大学(华东) 地球科学与技术学院 深层油气实验室, 山东 青岛 266580
  • 收稿日期:2022-07-07 修回日期:2022-08-05 出版日期:2023-01-25 发布日期:2022-10-20
  • 作者简介:卢双舫(1962—),男,教授,博士生导师,主要从事非常规油气地质学和油气地球化学研究。E-mail: lushuangfang@qq.com
  • 基金资助:
    国家自然科学(重点)基金项目(41972136);国家自然科学(重点)基金项目(41330313)

In-situ upgrading and transformation of low-maturity shale: Economic feasibility and efficiency enhancement approaches from the perspective of energy consumption ratio

LU Shuangfang1,2,3(), WANG Jun3, LI Wenbiao1,2(), CAO Yixin3, CHEN Fangwen3, LI Jijun3, XUE Haitao3, WANG Min3   

  1. 1. Sanya Offshore Oil & Gas Research Institute, Northeast Petroleum University, Sanya 572025, China
    2. Key Laboratory of Continental Shale Hydrocarbon Accumulation and Efficient Development, Ministry of Education, Northeast Petroleum University, Daqing 163318, China
    3. Key Laboratory of Deep Oil and Gas, School of Geosciences, China University of Petroleum (East China), Qingdao 266580, China
  • Received:2022-07-07 Revised:2022-08-05 Online:2023-01-25 Published:2022-10-20

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摘要：

在原位改质技术开发中,对低熟页岩的巨大的油气资源潜力的技术可行性质疑不多,但由于致热页岩耗能巨大,经济可行性还面临重重质疑,也缺乏有力的定量论证。本文从能量守恒原理出发,对致热页岩过程中生成油气的获能和裂解有机质的耗能、页岩吸热耗能、围岩散热耗能分别进行了定量评价,得到了不同条件下的能耗比及其影响因素,结果表明:能耗比随TOC含量的升高快速增大,对倾油性的页岩,能耗比为3时对应的TOC含量≈4.2%,表明,当TOC含量较高时,有望通过大规模作业摊薄工程成本,使考虑工程成本之后的能耗比>1,即原位加热改质技术可以具有经济效益。从有关因素对能耗比的影响幅度来看,提高经济可行性的增效途径之一是探寻高效致热页岩、减少围岩传导耗热的技术;途径之二是探寻高效转化有机质为油气的技术,即探索具有催化效应/能力的技术,减少页岩吸热和致热时间;途径之三是探寻综合考虑能耗比、时间成本、工程成本的水平井综合布井技术。

关键词: 页岩油气, 原位改质, 能耗比, 高效致热, 有机质高效转化

Abstract:

There are few doubts about the technical applicability of in-situ upgrading technology in developing the enormous oil and gas resource potential of low-maturity shale. However, due to the enormous energy consumption required in shale heating, its economic feasibility is still in doubt for lack of quantitative evidence. On the basis of energy conservation law, this paper quantitatively evaluates energy gained from oil and gas generation and energy consumed by organic matter cracking, shale heating, and wallrock cooling during in-situ heating. The energy consumption ratios under different conditions are obtained and the influencing factors are analyzed. The results show that the energy consumption ratio increases rapidly with increasing TOC. For oil-prone shales, energy consumption ratio corresponding to TOC of ~4.2% is 3, indicating shale with high TOC is expected to lower cost through large-scale operation to make energy consumption ratio greater than 1, so that in-situ heating and upgrading technology can achieve economic benefits. Considering the factors influencing the energy consumption ratio, the main ways to improve economic feasibility include (1) explore technologies for efficient shale heating while reducing heat dissipation from wallrock. (2) Explore technologies for efficient organic matter transformation into oil and gas, that is, shorten in-situ heating time through catalysis. (3) Establish a comprehensive horizontal-well deployment technology that takes a comprehensive consideration of the energy consumption ratio, time cost, and engineering cost.

Key words: shale oil and gas, in-situ upgrading, energy consumption ratio, high-efficiency heating, efficient transformation of organic matter

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