Research and Application of Effective Exploitation Mechanism of Microscopic Pores in Heavy Oil Based on Displacement Pressure Gradient

DOI

10.2991/978-94-6463-415-0_4How to use a DOI?

Keywords

heavy oil; displacement characteristics; displacement pressure gradien; horizontal wel; development strategy

Abstract

It is of great significance to study the effective exploitation mechanism of the micro-pores of heavy oil and design the corresponding injection and production pattern for enhanced oil recovery. Based on CT digital core technology, a lattice Boltzmann micropore simulation model was established to study the micropore displacement mechanism and oil displacement efficiency under different displacement pressure gradients. The results show that with the displacement pressure difference increasing from 0.3MPa to more than 0.8MPa, the medium and small pore crude oil with pore throat radius less than 80μm gradually begins to flow. As the viscosity of crude oil increases from 80mPa·s to 260mPa·s, the flow resistance of crude oil in medium and small pores increases sharply, and the displacement pressure gradient increases to more than 0.008MPa/m, which is conducive to improving the flow capacity of crude oil in medium and small pores, thus greatly improving the overall displacement efficiency. The above knowledge is applied to the development of QHD heavy oil field in Bohai Sea during the high water cut period. The strategy of large-scale utilization of horizontal well joint directional well development adjustment is adopted, and the anti-nine-point well pattern is adjusted from the initial directional well to the five-point well pattern of horizontal well joint directional well. The oil production rate is increased from 0.8% to 1.5% ~ 2.1%, and the water cut rise rate is controlled at about 0.6%. Water drive recovery rate increased from 24.5% to 39.3%, which greatly improved the development effect and provided experience for similar oil fields.

Copyright

© 2024 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Tingli Li
AU  - Jie Tan
AU  - Zhiqian Yuan
PY  - 2024
DA  - 2024/05/14
TI  - Research and Application of Effective Exploitation Mechanism of Microscopic Pores in Heavy Oil Based on Displacement Pressure Gradient
BT  - Proceedings of the 2023 9th International Conference on Advances in Energy Resources and Environment Engineering (ICAESEE 2023)
PB  - Atlantis Press
SP  - 21
EP  - 27
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-415-0_4
DO  - 10.2991/978-94-6463-415-0_4
ID  - Li2024
ER  -