Study on thermal decomposition of oil shale: Two-phase fluid simulation in wellbore

Bin Nie

Energy, 2023, vol. 272, issue C

Abstract: The world is rich in oil shale resources, but exploration and development are difficult. Increasing oil shale reservoir temperature has been proved to be one of the effective technologies to improve oil shale recovery. This paper takes the concentric dual pipe saturated steam injection of oil shale reservoir as the research object, and carries out the following three research works: firstly, a mathematical model of concentric twin tubes filled with saturated steam is proposed. Then, the coupling mode of the vertical and horizontal sections of the concentric double pipe is studied. Thirdly, the internal and external characteristics of wellbore in the process of saturated steam cycle are systematically modeled. Results show that: (a) Since the steam absorption index method is used to calculate the steam absorption along the way, the saturated steam mass flow rate in the horizontal annular space is in a uniform decline mode. (b) The slope of saturated steam dryness near the oil shale reservoir is about 1.3 times of that in the vertical wellbore. (c) In the annular space of horizontal wellbore, the pressure of saturated steam is flat U-shaped. (d) With the increase of the steam absorption capacity of oil shale reservoir, the mass flow rate of saturated steam in the annular space of the horizontal section wellbore decreases continuously. (e) The higher the steam absorption capacity of oil shale reservoir is, the lower the saturated steam dryness in annular space is.

Keywords: Oil shale; Thermal oil recovery; Concentric double tube; Saturated steam; Steam absorption capacity (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544223005182
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:272:y:2023:i:c:s0360544223005182

DOI: 10.1016/j.energy.2023.127124

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().