Best Practices for Using Coiled Tubing to Assist Plug-And-Perf Multistage Fracturing Operations in HP/HT Wells

Singh, Ishaan; Saraf, Aman; Pathak, Akash Ramesh; Bandyopadhyay, Bholanath; Dehingia, Madhurjya; Wijoseno, Danny Aryo; Shaik, Moulali; Rao, Dasari Papa

doi:10.4043/30532-ms

Cited by 3 publications

(1 citation statement)

References 3 publications

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“…As a result, researchers in the oil industry have conducted extensive studies on the seepage mechanism of horizontal wells (Zhao et al 2021;Xia et al 2021;Zhang et al 2022). The development of unconventional oil and gas resources requires the use of hydraulic fracturing and other technologies (Li et al 2018;Singh et al 2020;Vishkai and Gates et al 2019;Hakimi et al 2023;Zhao et al 2022;Baouche et al 2022). Spencer et al (2013) reported on two horizontal tracer tests conducted on horizontal wells in the Eagle Ford Shale, providing insight into tracer response and the current Tracers with the same concentration are added to the fracturing fluid during the fracturing process, and then, the tracer concentration curve changes with time as flowback fluid is sampled, analyzed, and processed.…”

Section: Introductionmentioning

confidence: 99%

Application of micro-substance tracer test in fractured horizontal wells

Yang,

Guo,

Lin

et al. 2024

J Petrol Explor Prod Technol

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This paper delves into a novel micro-substance tracer test in fractured horizontal well C-15. The experimental results are highly encouraging as they demonstrate that the trace material tracer is capable of satisfying the testing demands, even when there are large numbers of fracturing stages involved. Data interpretation process involved dividing the test duration into two stages-fluid flowback period and stable production period. The tracer test data were employed to analyze the production profile of the well. The findings made it evident that the primary production stage underwent alterations in different production stages. Moreover, the degree of heterogeneity pertaining to each fracturing stage was characterized by employing the residence time distribution method. It was observed that the Lorentz coefficient lying between the primary production stage and the remaining fracturing stages ranged from 0.46 to 0.68. This study expands the application of the residence time distribution method for evaluating tracer testing. Through a comprehensive analysis of heterogeneity data within the fracturing stages and the production dynamics of the well, the effectiveness of the fracturing process can be assessed. This research enables reservoir operators to gain deeper insights into the dynamics of test wells, ultimately leading to increased production efficiency.

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Section: Introductionmentioning

confidence: 99%

Application of micro-substance tracer test in fractured horizontal wells

Yang,

Guo,

Lin

et al. 2024

J Petrol Explor Prod Technol

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Executing Unconventional Coiled Tubing Sand Plugs for Multistage Fracturing Operations in HP/HT Wells

Singh

Saraf

Pathak

et al. 2020

Day 1 Mon, May 04, 2020

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Coiled tubing (CT) sand plug operations associated with multistage fracturing operations in high-pressure/high-temperature (HP/HT) wells are very challenging, in part because of the small number of such jobs that have been performed worldwide. The wells in "A" field in India have HP/HT formations, with a bottomhole temperature (BHT) of 310°F and a reservoir pressure of 9,000 psi. Although millable bridge plugs are preferred industry-wide, this case illustrates how sand plugs become a suitable alternate solution for multistage stimulation to address space limitations, equipment and completion restrictions, and small tubing sizes, even in challenging downhole conditions. This study provides solutions to operational challenges of low injectivity and completion restrictions, which preclude bullheading and use of conventional bridge plugs. Simulations were sensitized to identify the best solutions for sand settling time, HP/HT conditions, pumping rates, CT speeds, and cleanouts where calcite or scale deposits on sand hinder bottomhole assembly (BHA) penetration. Best practices are given for sand plug operations in challenging HP/HT environments; those best practices can be applied as a reference to design, prepare, and safely perform CT sand plug jobs in such conditions around the world. To address operational challenges in the cases presented here, the first three stages were bullheaded and the last two (a total 325-m sand plug) were placed using CT. Wireline was run to verify CT sand plug tag at ×200-m measured depth (MD). After the successful refracturing job, the 340-m sand plug was cleaned out, followed by acid spotting and squeeze using CT to rejuvenate the lowest zone. Strict application of the recommendations prevented the occurrence of operational contingencies, such as stuck CT, sand bridging, and settling of sand in surface equipment.

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Bridge Plug Drillouts Cleaning Practices—An Overview

Trabelsi¹,

Seibi²,

Liu³

et al. 2021

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Horizontal fracture-simulated completions remain the most reliable method of producing hydrocarbons from shale formations. The vast majority of unconventional wells are completed using the "Plug and Perf" method. This method involves using either a coiled tubing (CT) with a positive displacement motor or a jointed pipe to mill out composite plugs after fracturing operations are completed. An estimated average of 120,000 composite plugs is installed in the US alone each year. Bridge plug drillouts from milling operations tend to accumulate in horizontal wells and can cause stuck pipe incidents and loss of well control. Efficient removal of composite plugs' debris is crucial in achieving operational efficacies and full production potential. This paper provides an overview of the various bridge plug drillouts cleaning practices adopted in horizontal wells. It discusses several case histories, showcasing how operators solved cleanout challenges. Developed mechanistic models to better understand hole cleaning are also reviewed. As more unconventional wells are being set at more extensive depths, an economical and optimized coiled tubing process becomes increasingly important. This paper focuses on delivering a more conclusive set of recommendations to increase efficiency and improve current composite plug coiled tubing cleaning-milling practices, increase operational efficiency and reduce cost.

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Best Practices for Using Coiled Tubing to Assist Plug-And-Perf Multistage Fracturing Operations in HP/HT Wells

Cited by 3 publications

References 3 publications

Application of micro-substance tracer test in fractured horizontal wells

Application of micro-substance tracer test in fractured horizontal wells

Executing Unconventional Coiled Tubing Sand Plugs for Multistage Fracturing Operations in HP/HT Wells

Bridge Plug Drillouts Cleaning Practices—An Overview

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