A multi-stage screening approach to evaluate risks from inter-aquifer leakage associated with gas well and water bore integrity failure

Doble, Rebecca; Mallants, Dirk; Huddlestone-Holmes, Cameron; Peeters, Luk; Kear, James; Turnadge, Chris; Wu, Bailin; Noorduijn, Saskia; Arjomand, Elaheh

doi:10.1016/j.jhydrol.2023.129244

Cited by 5 publications

(3 citation statements)

References 39 publications

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“…All three approaches indicated that high flow leaky gas wells (effective well conductivity, Kw <10 −1 m/d) are not likely to cause significant increases in inter-aquifer leakage or drawdown in upper aquifers based on conditions reported in previous studies and for the case study. However, extremely high flow leaky wells (Kw >10 2 m/d) could have an impact where aquitard conductivity is 10 −4 m/d or less, or well failure density is higher than 1 well per km 2 (Doble et al, 2023). Nonetheless, compromised gas wells with Kw values >1 m/d have not been identified in previous studies.…”

mentioning

confidence: 92%

Assessing the potential impacts of well integrity failure on groundwater resources in Australia

2023

MODSIM2023, 25th International Congress on Modelling and Simulation.

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mentioning

confidence: 92%

Assessing the potential impacts of well integrity failure on groundwater resources in Australia

2023

MODSIM2023, 25th International Congress on Modelling and Simulation.

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“…With the development of oil and gas industry, the phenomenon of abnormal annulus pressure in oil and gas wells is gradually increasing, which has become an important problem affecting the safe production of gas wells [1][2][3] . One of the important reasons for causing annular pressure is the failure of pipe integrity, and the rate of annular leakage is one of the most core parameters for determining whether the integrity of gas wells has failed [4][5][6] . Due to the problems of high temperature, high pressure and sour gas, how to safely and effectively determine the leakage area and leakage rate of gas wells in the annulus is currently facing technical challenges [7,8] .…”

Section: Introductionmentioning

confidence: 99%

A New Calculation Method of Well Leakage in Gas Well with Annular Pressure

Yuan,

Luo,

2024

E3S Web Conf.

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The gradual promotion of the concept of gas well integrity has made major oil and gas fields pay more and more attention to the integrity management and evaluation of gas wells with annular pressure. Annular leakage rate is one of the key parameters for gas well integrity evaluation. However, the leakage rate measurement of high-temperature, high-pressure, and acid-containing gas wells has high risks and costs, which are often difficult to obtain in field operations. In order to obtain the bottom hole leakage rate parameters of the gas well to assist the integrity evaluation, this article is based on the safety valve leakage model and the small hole leakage model, combined with the characteristics of the gas well with annulus pressure, the idea of applying the annulus leakage rate calculation from the perspective of model mechanism is analysed, and the model parameters are clarified as well. The application of the two leak models is compared by case wells calculation, which verifies their rationality and feasibility. The research of this paper provides a theoretical basis for the leakage evaluation of gas well with annular pressure, and promotes development of gas well integrity management research.

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“…Suitable aquifers should have impermeable caps to prevent CO2 release and high permeability (10 -21 m² nanodarcies) and porosity (<1%) beneath the cap for even CO2 distribution. Leakage into groundwater sources, while theoretically possible, is unlikely (Doble et al, 2023). Chemical interactions between CO2 and surrounding rock could lead to the formation of stable carbonates, extending CO2 storage duration (Li et al, 2020).…”

Section: Saline Aquifersmentioning

confidence: 99%

CO2 mineralization process in basalt rocks: study case, Serra Geral Formation, Paraná sedimentary Basin, São Paulo state

Alzate Rubio

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To my beloved parents and Fabi, This thesis is dedicated to you, with immeasurable gratitude and profound love. Your unwavering support, encouragement, and sacrifice have been the bedrock upon which my academic journey has been built. Your faith in me, even during my moments of doubt, has been a constant source of inspiration. Your sacrifice has allowed me to pursue my dreams with unrelenting determination. I am eternally grateful for it.This thesis stands as a testament to the love and support you have generously bestowed upon me. It is a reflection of the values and principles you instilled in me, and a tribute to the incredible parents who have always believed in my potential, even when I haven't myself.With all my heart, I dedicate this thesis to you, my pillars of strength, my mentors, and my greatest supporters. Thank you for being the wind beneath my wings, propelling me toward academic achievement and personal growth.With deepest love and gratitude, Valentina viii I would like to express my heartfelt gratitude to all those who have been instrumental in the successful completion of my master journey. Without your support, guidance, and encouragement, this accomplishment would not have been possible.First and foremost, I extend my sincere appreciation to my advisor Colombo, whose unwavering dedication, expertise, and invaluable insights have been the cornerstone of this research. Your mentorship has not only enriched my academic experience but also inspired me to push the boundaries of knowledge.I am deeply indebted to the entire IGc -Geoscience Institute and IEE -Energy and Environment Institute for fostering an intellectually stimulating environment that nurtured my research endeavors. The collaborative spirit and resources provided by the institutes played a fundamental role in shaping the outcome of this thesis.My gratitude extends across borders to my friends from another life, you have been a source of camaraderie, support, and moments of respite throughout this journey. Your presence, both in the academic and personal spheres, has made this experience all the more enriching.To my friends in Brazil, o meu bloquinho de meninas, who have offered friendship, cultural exchange, unwavering encouragement and warm hugs. Your diverse perspectives and love have broadened my horizons and enriched my life.Lastly, I would like to acknowledge all the individuals, institutions, and resources that have contributed to this thesis as well: The amazing technical support from Samuca from LTA laboratory, the Scanning electron microscopy laboratory, in charge of Eng. Isaac, the X-ray fluorescence laboratory and help of tec. José Paulo Sertek and the Optical microscopy laboratories of the IGc.

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A multi-stage screening approach to evaluate risks from inter-aquifer leakage associated with gas well and water bore integrity failure

Cited by 5 publications

References 39 publications

Assessing the potential impacts of well integrity failure on groundwater resources in Australia

Assessing the potential impacts of well integrity failure on groundwater resources in Australia

A New Calculation Method of Well Leakage in Gas Well with Annular Pressure

CO2 mineralization process in basalt rocks: study case, Serra Geral Formation, Paraná sedimentary Basin, São Paulo state

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