Drilling of the well IDDP-1

Pálsson, Bjarni; Hólmgeirsson, S.; Guðmundsson, Á.; Bóasson, H.Á.; Ingason, Kristinn; Sverrisson, H.; Þórhallsson, Sverrir

doi:10.1016/j.geothermics.2013.08.010

Cited by 32 publications

(10 citation statements)

References 3 publications

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“…7b ) may also explain why the aureoles of shallow magma bodies serendipitously encountered by geothermal drilling 33 , 34 have very steep temperature gradients over short distances of a few tens of metres 35 , 36 . Drilling of these magmatic aureoles has been characterised by strong loss in drilling fluid circulation 37 ; the results here suggest that efficient cooling by injection of fluids at ~80 °C in a magmatic aureole at ca. 850 °C would have caused thermal jointing and a significant widening of fractures to allow drilling fluid circulation loss during drilling activity.…”

Section: Discussionmentioning

confidence: 62%

Disclosing the temperature of columnar jointing in lavas

et al. 2018

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Columnar joints form by cracking during cooling-induced contraction of lava, allowing hydrothermal fluid circulation. A lack of direct observations of their formation has led to ambiguity about the temperature window of jointing and its impact on fluid flow. Here we develop a novel thermo-mechanical experiment to disclose the temperature of columnar jointing in lavas. Using basalts from Eyjafjallajökull volcano (Iceland) we show that contraction during cooling induces stress build-up below the solidus temperature (980 °C), resulting in localised macroscopic failure between 890 and 840 °C. This temperature window for incipient columnar jointing is supported by modelling informed by mechanical testing and thermal expansivity measurements. We demonstrate that columnar jointing takes place well within the solid state of volcanic rocks, and is followed by a nonlinear increase in system permeability of <9 orders of magnitude during cooling. Columnar jointing may promote advective cooling in magmatic-hydrothermal environments and fluid loss during geothermal drilling and thermal stimulation.

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Section: Discussionmentioning

confidence: 62%

Disclosing the temperature of columnar jointing in lavas

et al. 2018

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“…We know little of the internal and underground conditions at active volcanoes, other than the rough inferences that we make by observing and mapping extinct, ancient, eroded volcanoes or that we extract from geophysical, geochemical and petrologic information, which itself has large uncertainties. Our view of active underground magmatic systems, and their relationships with the surrounding rocks, is basically speculation, as we do not directly observe them (with the negligible exception of geothermal drilling at the Krafla caldera, in Iceland, that accidentally encountered magma, Pàlsson et al 2014; and of scientific drilling into the surficial Kilauea Iki lava lake, Heltz 1980Heltz , 1987. It may be discomforting, but it is not surprising that our attempts to predict the evolution of volcanic systems are destined to take the form of exceedingly uncertain approximations; and that our probabilistic forecasts are affected or dominated by substantial uncertainties.…”

Section: Rational Volcanic Hazard Forecastsmentioning

confidence: 79%

Rational volcanic hazard forecasts and the use of volcanic alert levels

Papale

2017

J Appl. Volcanol.

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Volcanologists make hazard forecasts in order to contribute to volcanic risk assessments and decision-making, in areas where volcanic phenomena have the potential to impact societal assets. Present-day forecasts related to the potential occurrence of an eruption mostly take the form of alert levels, that are established by volcano scientists with the aim of communicating the state of a volcano and its possible short-term evolution. Here I analyse current alert level systems and their role in decision-making processes. I show that the use of such systems implies predictive capabilities not supported by corresponding levels of confidence in the knowledge of the volcano. Their use also implies an assumption of volcano scientist responsibility for decisions that goes beyond the expertise of the scientist, and which, in most countries, is not granted by a corresponding societal mandate. A rational volcanic hazard forecast system accepts instead the uncertain nature of volcanic processes and the consequent limited predictive capabilities; forecasts expressed as probabilities, or better as probability distributions, reflect a rational attitude by scientists and assure clear roles that reflect both expertise and societal mandate to any group involved in the management of a volcanic crisis. Exceptions where the use of volcanic alert levels may lead to efficient management are also discussed.

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“…This generates additional net costs and in extreme cases compromises completion integrity, operational safety and the environment, thus increasing nonproductive time. Palsson et al 29 described a series of lost circulation events in the drilling of a geothermal well in the Krafla field in Iceland (designed to reach a depth of 4500 m). Over 60 L/s of mud losses occurred at a depth of 2043 m; this could not be stopped by the drilling team and the remedy was to replace the mud with water.…”

Section: Loss Circulationmentioning

confidence: 99%

A review of technological advances and open challenges for oil and gas drilling systems engineering

Epelle

Gerogiorgis

2019

AIChE Journal

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The ever-increasing quest to identify, secure, access and operate oil and gas fields is continuously expanding to the far corners of the planet, facing extreme conditions towards exploring, securing and deriving maximum fluid benefits from established and unconventional fossil fuel sources alike: to this end, the unprecedented geological, climatic, technical and operational challenges have necessitated the development of revolutionary drilling and production methods. This review paper focuses on a technological field of great importance and formidable technical complexity -that of well drilling for fossil fuel production. A vastly expanding body of literature addresses design and operation problems with remarkable success: what is even more interesting is that many recent contributions rely on multidisciplinary approaches and reusable Process Systems Engineering (PSE) methodologies -a drastic departure from ad hoc/one-use tools and methods of the past.The specific goals of this review are to first, review the state of art in active fields within drilling engineering, and explore currently pressing technical problems, which are in dire need, or have recently found, PSE-and/or CFD-relevant solutions. Then, we illustrate the methodological versatility of novel PSE-based approaches for optimization and control, with an emphasis on contemporary problems.Finally, we highlight current challenges and opportunities for truly innovative research contributions, which require the combination of best-in-class methodological and software elements in order to deliver applicable solutions of industrial importance. Well drilling in the oil and gas industryThe annual increase in global energy demand and the diverse applications of conventional & unconventional oil and gas resources are indicative of the fact that these resources will continuously remain relevant to humanity in the far future. With increasing climate change concerns, natural gas already provides a promising transition between some oil-based fuels and renewables in the long run, despite its well-known transportation difficulties. 1 It can be further argued that natural gas represents an economically attractive option for electricity generation (particularly in the US where shale gas is naturally abundant) with significantly reduced greenhouse gas emissions compared to coal; thus increasing its market demand. 2 These reasons have warranted the advancements in technologies of

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Drilling of the well IDDP-1

Cited by 32 publications

References 3 publications

Disclosing the temperature of columnar jointing in lavas

Disclosing the temperature of columnar jointing in lavas

Rational volcanic hazard forecasts and the use of volcanic alert levels

A review of technological advances and open challenges for oil and gas drilling systems engineering

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