Characterizing Water Breakthrough Using Analytical Diagnostic Workflow

Dokhon, Waleed; Alkayadi, Fatimah; Dallag, Mohammed

doi:10.2523/iptc-20274-abstract

Cited by 6 publications

(1 citation statement)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Another inclusive workflow was proposed to understand water breakthrough mechanisms and prioritize well remediation (Dokhon et al, 2020). The Chan correlation was their essential analytical tool, while the secondary investigative tools were PLT and ionic-produced water analysis.…”

Section: Coupling Chan Plot Interpretation With Other Diagnostic Toolsmentioning

confidence: 99%

A Review of Chan Plot Application and Recent Advanced Models for Diagnosing Excessive Water Production

Hamdoon,

Mohammed,

Elraies

2024

MGPB

View full text Add to dashboard Cite

Water is one of the major fluids associated with the operational cycle of the oil industry that must be carefully considered due to its environmental, treatment facility, and economic impacts. Over the years, various methods have been developed to identify excessive water production. These methods range from reliable and expensive ones, such as well-logging records, to less accurate methods that utilize available production and water-oil ratio data, such as the Chan plot. The Chan plot emphasizes that well production can exhibit various patterns of excessive water production, including constant water-oil ratios, normal displacement, channeling, and coning. However, manual interpretation of these plots is often confusing due to the noise present in the actual data. Machine learning models have improved interpretation accuracy, but limitations remain in detecting evolving water production patterns. This paper reviews the application of Chan plots and their integration with existing diagnostic tools for diagnosing excessive water production. It then focuses on a recent advanced model that leverages machine learning specifically designed to improve the interpretation of Chan plots. The review highlights the limitations of traditional interpretation techniques and explores how the recent advanced model can address these limitations. Additionally, the paper briefly discusses the potential of an interactive model for the continuous monitoring of water production patterns. Finally, the paper offers recommendations for future research directions.

show abstract

Section: Coupling Chan Plot Interpretation With Other Diagnostic Toolsmentioning

confidence: 99%

A Review of Chan Plot Application and Recent Advanced Models for Diagnosing Excessive Water Production

Hamdoon,

Mohammed,

Elraies

2024

MGPB

View full text Add to dashboard Cite

show abstract

Methodological Aspects of Repair and Insulation Operations Improving Efficiency

Yakubov

Strijnev

Ленченкова

et al. 2020

ntj-oil

View full text Add to dashboard Cite

Water Shutoff in Naturally Fractured, Low-Pressure Reservoirs: Case Studies

Aldana

Sánchez

Zertuche

et al. 2020

SPE Asia Pacific Oil &Amp; Gas Conference and Exhibition

View full text Add to dashboard Cite

Water production represents a major challenge over the life of a reservoir. It is an important issue that directly affects hydrocarbon production and total reserves recovery around the world, especially in fractured reservoirs. In the south of Mexico, several naturally fractured, low-pressure reservoirs experience production disruptions when water from the aquifer channels invades oil-producing intervals through high-conductivity fractures. Water shutoff (WSO) treatments vary in design approach and efficacy percentage due to the difference in environments and formations that are subject to water breakthrough. For the last decade, in southern Mexico, different treatments have been performed without achieving the expected results in the described reservoirs. These treatments have included different types of fluids, including rigid setting gels; reactive pills; selective water setting cement; and conventional cement slurries, with or without the use of mechanical aids such as mechanical plugs, cement retainers, or coiled tubing for precise placement. One of the biggest challenges of WSO in these reservoirs is that the proposed treatments must have a high level of penetration into the natural fractures but, at the same time, they need to be displaced with nitrogen or light hydrocarbon derivatives to balance reservoir pressure, avoiding total losses of fluids into the highly conductive, low-pressure reservoir where they will lose the ability to control water flow from the aquifer. Using the synergies of the operator's reservoir knowledge, diagnostic workflow, and historical treatment records coupled with service company's treatment engineering technologies and local ability to manipulate and enhance existing WSO fluids, we exercised a systematic evaluation approach to the evaluation of past unsuccessful experiences and proposed adjustments to conventional treatments using rigid gel and conventional cement slurries for water control. Integrating the relevant findings following operator's water control diagnostic workflow with the study of relevant papers and methodologies used by oil companies around the globe, we proposed a different treatment strategy consisting in the addition of a reactive pill between the rigid gel and the cement to keep the treatment in the vicinity of the wellbore, viscous spacers between each treatment fluid to avoid contamination while traveling downhole, the inclusion of lost circulation fibers to create a fibrous net to promote cement filter-cake development and tailored treatment displacement with a predefined pressure according to reservoir condition that is close to the reservoir-equivalent hydrostatic pressure. During the past 2 years, the application of rigorous evaluation of potential candidates and the combination of these three enhanced WSO fluids in the described sequence reduced unwanted water production in two naturally fractured low-pressure reservoirs. In three field cases, the use of the proposed methodology led to a reduction of overall water production from an initial value between 70 and 100% to levels below 30%. Incremental oil production has been maintained in the best cases for more than 2 years after the treatments. The most significant result occurred in the first field case, where the water cut was reduced from 90% to less than 2% and oil production increased 12 times, obtaining a cumulative oil production of 240,000 bbl in a year. The documented methodology is a work in progress; we cannot replicate the technique exactly because each well presents challenges according to its construction and structural placement. Similar WSO treatments have been successfully applied in several wells in southern Mexico, increasing oil production and recoverable reserves. Continuous improvement efforts have also led to efficiency enhancement over time, as results and lessons learned are captured to be shared and replicated in similar reservoirs.

show abstract

Characterizing Water Breakthrough Using Analytical Diagnostic Workflow

Cited by 6 publications

References 4 publications

A Review of Chan Plot Application and Recent Advanced Models for Diagnosing Excessive Water Production

A Review of Chan Plot Application and Recent Advanced Models for Diagnosing Excessive Water Production

Methodological Aspects of Repair and Insulation Operations Improving Efficiency

Water Shutoff in Naturally Fractured, Low-Pressure Reservoirs: Case Studies

Contact Info

Product

Resources

About