Streamlines for the Target Injection Calculation in Complex Field Conditions
- Andrey Gladkov (Modeling Technologies Center, Moscow) | Danila Kondakov (Modeling Technologies Center, Moscow) | Rustem Gareev (Modeling Technologies Center, Moscow) | Maria Belyanushkina (Modeling Technologies Center, Moscow) | Anton Lvov (Modeling Technologies Center, Moscow) | Ivan Arsenevsky (Modeling Technologies Center, Moscow)
- Document ID
- Society of Petroleum Engineers
- SPE Arctic and Extreme Environments Technical Conference and Exhibition, 15-17 October, Moscow, Russia
- Publication Date
- Document Type
- Conference Paper
- 2013. Society of Petroleum Engineers
- 5.4.1 Waterflooding
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The target injection determination is one of the major issues in waterflooding management. The study resulted in a fully automatic approach to the waterflooding management via the block analysis based on continuously updated hydrodynamic models. The authors propose an automated workflow that provides a closed cycle for waterflooding management: from estimation of target voidage replacement ratio (VRR) per blocks, calculation of recommended well injection rates and monitoring of the plan implementation on optimum VRR per blocks.
The paper describes a new approach to key two problems arising from the analysis of waterflooding block performance: the identification of block boundaries with minimum cross-flows between blocks and the correct production / injection allocation (distribution) for wells located on the blocks boundaries.
A real-field example, demonstrating the application of the proposed technique, includes the construction of a three-dimensional hydrodynamic model, automatically updated on a monthly basis using actual production / injection data with the streamline map generation. After that, also automatically, the adjustment of waterflooding block boundaries takes place (with the indication of poor drainage areas), with calculation of well allocation factors. The data derived are used in waterflooding performance analysis and block ranking based on a given set of parameters.
The waterflooding analysis is carried out based on waterflooding performance indicators, which are calculated at different levels, from field to well. Different authors propose a set of integrated tools for the waterflooding analysis from the field and pay zone levels to the level of reservoir blocks and individual wells [1, 2, 3]. In his article Thakur  provided a list of tools for each level.
For the block waterflooding analysis, the waterflooding performance indicators are computed per blocks. The key performance indicators include production and injection per blocks, therefore, for the correct block analysis, the blocks with minimum crossflows should be indentified and the production and injection should be correctly allocated for the wells on block boundaries based on WAFs.
In the article  the authors of this paper demonstrate the advantages in dynamic algorithm application for the WAF determination.
The proposed approach is based on the finite-difference three-dimensional hydrodynamic simulation and on the use of a dedicated post-simulator for processing the hydrodynamic modeling results and production and injection well interaction on the basis of streamline technology. The estimated well interaction coefficients and streamline trajectories together with well production / injection data are taken as an input for the author's algorithm that performs an automatic field division into blocks and WAF calculation.
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