Abstract
Due to the strong heterogeneity of thick oil layer bottom water reservoirs, the production characteristics of each horizontal well vary greatly after entering the high water cut stage, and the judgment of the water flooding degree directly affects the subsequent treatment process of the well. In this paper, through the analysis of the water flooding mechanism, the water flooding mode of horizontal wells with bottom water is improved, the second derivative template of the water cut is innovatively applied, and the semiquantitative judgment of the water yield point and water yield intensity is conducted in two rounds, forming the evaluation method for the water flooding characteristics of horizontal wells in thick oil reservoirs with bottom water. The research results indicate that the main factors affecting the water flooding situation of horizontal wells in bottom water reservoirs are the node flow rate and stacking effect. The improved four types of water flooding modes for bottom water horizontal wells not only clarify the division of the water outlet point and water outlet intensity but also form a corresponding relationship with the actual water cut change curve in production. From the trend of the water cut change curve, the approximate water flooding mode and remaining oil potential can be roughly determined. The case analysis of the Tahe horizontal well shows that using this method can accurately determine the water flooding mode and water outlet point of a single well. The judgment results of water flooding using this method are basically consistent with the production logging results, indicating good application prospects.
Copyright 2023, IFEDC Organizing Committee.
This paper was prepared for presentation at the 2023 International Field Exploration and Development Conference in Wuhan, China, 20–22 September 2023.
This paper was selected for presentation by the IFEDC Committee following review of information contained in an abstract submitted by the author(s). Contents of the paper, as presented, have not been reviewed by the IFEDC Technical Team and are subject to correction by the author(s). The material does not necessarily reflect any position of the IFEDC Technical Committee its members. Papers presented at the Conference are subject to publication review by Professional Team of IFEDC Technical Committee. Electronic reproduction, distribution, or storage of any part of this paper for commercial purposes without the written consent of IFEDC Organizing Committee is prohibited. Permission to reproduce in print is restricted to an abstract of not more than 300 words; illustrations may not be copied. The abstract must contain conspicuous acknowledgment of IFEDC. Contact email: paper@ifedc.org.
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The project is supported by Sinopec Research Funding Project (Number 420055-3).
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Wang, Jh., Guo, N., Xu, Fy. (2024). Study on the Evaluation Method for Water Flooding Characteristics of Horizontal Wells in Thick Oil Reservoir with Bottom Water. In: Lin, J. (eds) Proceedings of the International Field Exploration and Development Conference 2023. IFEDC 2023. Springer Series in Geomechanics and Geoengineering. Springer, Singapore. https://doi.org/10.1007/978-981-97-0475-0_2
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DOI: https://doi.org/10.1007/978-981-97-0475-0_2
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