Numerical approach on production optimization of high water-cut well via advanced completion management using flow control valves

Ahn, Seongin; Lee, Kyungbook; Choe, Jonggeun; Jeong, Daein

doi:10.1007/s13202-023-01632-3

Cited by 5 publications

(1 citation statement)

References 25 publications

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“…At the early development stages, these wells are hypothesized to be centrally positioned in the oil layer. This scenario entails a closed boundary above in the vertical direction and an infinitely large boundary in the horizontal direction of the reservoir, with distinct horizontal and vertical permeabilities [21]. Subsequent to considering wellbore storage and skin effects, a dimensionless oil production index is formulated, defined as follows [22]:…”

Section: Mechanism Of Water Production In Horizontal Wellsmentioning

confidence: 99%

Enhanced Oil Recovery Through Balanced Production Techniques in Horizontal Wells of Bohai A Oilfield

Xue,

Zheng,

Liu

et al. 2024

ATG

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In response to the prevalent high water cut challenge in horizontal wells of the Bohai A Oilfield, this study introduces an innovative approach for pinpointing water production points in horizontal wells. The methodology leverages a comprehensive evaluation that integrates techniques such as curve identification, dynamic analysis, numerical simulation, and seepage model calculations. In conjunction, a novel hydraulic control-based balanced oil production process has been developed. This process utilizes a specialized water plugging string to effectively seal water production points in horizontal wells. Additionally, a hydraulic control system for horizontal well oil production has been implemented, facilitating staged extraction and thus achieving balance in oil production. Field application, particularly in Well X1, demonstrates a marked improvement post-implementation: the comprehensive water cut in Well X1 decreased from an initial 98.1% to 87.3%, and the production pressure differential escalated from 0.55 MPa to 2.01 MPa. This substantial enhancement in reservoir utilization indicates a notable reduction in water cut within the crude oil. The application of this balanced production technology in horizontal wells has led to a decrease in water cut and liquid production, significantly alleviating surface processing pressures. Consequently, there has been an improvement in well productivity and the overall development effectiveness of the oilfield. These findings suggest that the balanced oil production technique offers a promising solution for enhancing oil recovery in horizontal wells, particularly in fields grappling with high water cuts.

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Section: Mechanism Of Water Production In Horizontal Wellsmentioning

confidence: 99%

Enhanced Oil Recovery Through Balanced Production Techniques in Horizontal Wells of Bohai A Oilfield

Xue,

Zheng,

Liu

et al. 2024

ATG

View full text Add to dashboard Cite

show abstract

A sensitivity analysis of the impact of shut-in water cut of reactive control on net present value of waterflooding under reservoir uncertainty

Freitas,

Neto,

Sánchez

et al. 2024

Comput Geosci

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An integration of the numerical and soft computing approaches for determining inflow control device flow area in water injection wells

Mostakhdeminhosseini,

Rafiei

2024

J Petrol Explor Prod Technol

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To avoid or mitigate the unwanted water and gas content, inflow control devices (ICDs) are designed and installed in the well to disturb the water and gas breakthrough which are trying to overtake the oil inflow, water and gas coning and sand production. Smart wells with permanent downhole valves such as ICDs are used to balance production and injection in wells. A paramount issue regarding using downhole control devices is determining the required cross-sectional area of them for control of the imposed pressure drop across the device to stabilize the fluid flow. Current methods for calculating the opening size of the ICDs are mainly based on sensitivity analysis of the ICD flow area or optimization algorithms coupled with simulation models. Although these approaches are quite effective in oil field cases, they tend to be time-consuming and require demanding system models. This paper presents a fast analytical method to determine the ICD flow area validated by a genetic algorithm (GA). Analytically, a closed-form expression is introduced by manipulating Darcy’s law applicable to multi-layer injection wells with different layer properties to balance the injection profile in the reservoir pay zone, based on equalizing injected front velocity in layers with different permeability. Considering various scenarios of analytical technique, GA optimization, and sensitivity analysis scenarios for ICD cross-sectional area determination, results for oil recovery, water production, water breakthrough time, and net present value (NPV) are discussed and compared. NPV values obtained by both analytical and GA approaches are virtually identical and greater than those of other scenarios. Compared to the base field case, the analytical method improved the oil recovery by almost 1%, reduced water production by almost 91%, and synchronized the water breakthrough time of high- and low-permeability layers (from a ratio of 1.76–1.06). The proposed analytical solution proved to be capable of providing desirable results with only one reservoir simulation run in contrast to GA and sensitivity analysis scenarios which require iterative simulation runs. The proposed analytical solution outperformed the GA as it is less computationally demanding in addition to its success in case of lowering water production for the field data. The findings of this study can help for a better understanding of the situation where water injection into the oil reservoir is problematic as the layers present different permeabilities which can induce problems such as early water breakthrough from the more permeable layer and hinder the success of the water injection process. Using ICDs and a faster and more accurate approach to calculate its cross-sectional area such as the analytical method that was used in this study can greatly increase the success rate of water injection in case of oil recovery and lower the amount of the produced water.

show abstract

Numerical approach on production optimization of high water-cut well via advanced completion management using flow control valves

Cited by 5 publications

References 25 publications

Enhanced Oil Recovery Through Balanced Production Techniques in Horizontal Wells of Bohai A Oilfield

Enhanced Oil Recovery Through Balanced Production Techniques in Horizontal Wells of Bohai A Oilfield

A sensitivity analysis of the impact of shut-in water cut of reactive control on net present value of waterflooding under reservoir uncertainty

An integration of the numerical and soft computing approaches for determining inflow control device flow area in water injection wells

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