The Prediction of Oil and Water Content in Tight Oil Fluid: A Case Study of the Gaotaizi Oil Reservoir in Songliao Basin

Junhui Li, Jie Li, Xiuli Fu, Junwen Li, Shuangfang Lu, Zhong Chu and Nengwu Zhou ()
Additional contact information
Junhui Li: Exploration and Development Research Institute of PetroChina Daqing Oilfield Company Limited, Daqing 163712, China
Jie Li: Exploration and Development Research Institute of PetroChina Daqing Oilfield Company Limited, Daqing 163712, China
Xiuli Fu: Exploration and Development Research Institute of PetroChina Daqing Oilfield Company Limited, Daqing 163712, China
Junwen Li: Exploration and Development Research Institute of PetroChina Daqing Oilfield Company Limited, Daqing 163712, China
Shuangfang Lu: Sanya Offshore Oil & Gas Research Institute of Northeast Petroleum University, Sanya 572025, China
Zhong Chu: Sanya Offshore Oil & Gas Research Institute of Northeast Petroleum University, Sanya 572025, China
Nengwu Zhou: Sanya Offshore Oil & Gas Research Institute of Northeast Petroleum University, Sanya 572025, China

Energies, 2025, vol. 18, issue 19, 1-16

Abstract: The oil content in a produced fluid plays a crucial role in oil production engineering. In this paper, a predictive model for the oil and water proportions in produced fluid was established through nuclear magnetic resonance coupling displacement. This model successfully predicts the oil proportion in the produced fluid from each block within the Gaotaizi oil reservoir of the Songliao Basin and elucidates the reasons for its variation across different blocks. The production of pure oil in a vertical well area was attributed to the reservoir fluid exhibiting high bound water saturation, resulting in oil being the primary movable phase. In the testing and extended areas, variations in oil saturation combined with the pore size distribution governing oil and water occupancy are likely responsible for the differing oil-water ratios observed in the produced fluid. Specifically, a higher oil-to-water ratio (7:3) was produced in the testing area, while the extended area yielded a lower oil-to-water ratio (3:7). Furthermore, the model predicts an oil-to-water ratio of 4:6 for the produced fluid in the Fangxing area. To enhance oil production in the extended area, narrowing the fracture interval is proposed. However, this measure may not prove effective in other blocks.

Keywords: tight oil; oil content in produced liquid; Gaotaizi oil layer; Songliao Basin (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/18/19/5186/pdf (application/pdf)
https://www.mdpi.com/1996-1073/18/19/5186/ (text/html)

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:gam:jeners:v:18:y:2025:i:19:p:5186-:d:1761323

Access Statistics for this article

Energies is currently edited by Ms. Cassie Shen

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().