Geothermal Repurposing of Depleted Oil and Gas Wells in Italy

The decarbonisation of the energy sector is probably one of the main worldwide challenges of the future. Global changes urge a radical transformation and improvement of the energy-producing systems to meet the decarbonisation targets and a reduction of greenhouse gas emissions. The hydrocarbon industry also contributes to this transition path. In a mature stage of oil and gas fields, the production of hydrocarbons is associated with formation waters. The volume of produced water increases with the maturity of the assets and the geothermal repurposing of depleted oil and gas wells could be an alternative to the mining closure. In the described transition scenario, the geothermal energy seems very promising because of its wide range of applications depending on the temperature of extracted fluids. This flexibility enables us to propose projects inspired by a circular economic vision considering the integration in the territory and social acceptance issues. In Italy, since 1985, 7246 wells have been drilled for hydrocarbon, of which 898 are located onshore with a productive or potentially productive operational status. This paper presents a preliminary investigation of oil and gas fields located onshore in Italian territory based on the available information on temperature distribution at different depths. Then, taking into account the local energy demand, existing infrastructure, and land use of the territory, a conversion strategy for the producing wells is proposed for three case studies.

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ARRANGEMENT OF WELLS OVERHAUL REPAIR OPERATION UNDER PRESENT-DAY CONDITIONS OF OIL AND GAS FIELDS DEVELOPMENT

Oil and Gas Studies ◽

10.31660/0445-0108-2015-6-19-25 ◽

2015 ◽

pp. 19-25 ◽

Cited By ~ 1

Author(s):

A. V. Kustyshev ◽

Yu. V. Vaganov ◽

V. A. Dolgushin

Keyword(s):

Oil And Gas ◽

Gas Wells ◽

Service Companies ◽

Repair Operation ◽

Oil And Gas Fields ◽

Oil And Gas Wells ◽

Gas Fields

The paper presents a method for arrangement the oil and gas wells overhaul repair with attraction of service companies and proves the effectiveness of the proposed scheme of jobs organization and gives a determination of well work-over services.

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Identification and Assessment of Trace Contaminants Associated With Oil and Gas Pipeline Abandoned in Place

Volume 2: Design, Construction, and Operation Innovations; Compression and Pump Technology; SCADA, Automation, and Measurement; System Simulation; Geotechnical and Environmental ◽

10.1115/ipc1996-1940 ◽

1996 ◽

Author(s):

Wendy E. R. Thome ◽

Anne C. Basso ◽

Sukhvinder K. Dhol

Keyword(s):

Oil And Gas ◽

Critical Determinant ◽

Trace Contaminants ◽

Oil And Gas Fields ◽

Naturally Occurring ◽

Wide Range ◽

Cleaning Procedures ◽

Environmentally Sound ◽

Gas Fields ◽

Contaminant Release

As more Alberta oil and gas fields become depleted, attention is being given to development of economically and environmentally sound abandonment procedures. The objective of this study was to identify and assess residual internal and external contaminants associated with abandoned pipelines, particularly those to be abandoned in place. Circumstances which might increase the risk of contaminant release, and other issues relating to residual pipeline contaminants, were also identified. It was found that there are thousands of different substances which could potentially be associated with abandoned pipelines. A wide range in the potential quantities of residual contaminants was also found. Of the issues identified, the effectiveness of pipeline pigging and cleaning procedures prior to abandonment was the most critical determinant of the potential quantities of residual contaminants. However, a number of trace contaminants, such as PCBs (Polychlorinated Biphenyls) and NORMs (Naturally Occurring Radioactive Materials) may remain after thorough cleaning. A brief review of the legislation and regulations from a number of jurisdictions shows that pipeline abandonment has only recently become an issue of concern. Regulations specific to abandonment are lacking, and more genera] regulations and guidelines are being applied on a contaminant-specific basis, or in terms of waste disposal requirements.

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A PRELIMINARY INVESTIGATION OF OPTIMUM MAGNETOMETER TRANSECT SPACING TO LOCATE LEGACY OIL AND GAS WELLS

10.1130/abs/2018am-324445 ◽

2018 ◽

Author(s):

Michael G. Davis ◽

◽

Jason A. Patton

Keyword(s):

Oil And Gas ◽

Preliminary Investigation ◽

Gas Wells ◽

Oil And Gas Wells

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Experimental Investigation of the Vibration Control of Nonrotating Periodic Drill Strings

Journal of Vibration and Acoustics ◽

10.1115/1.4049942 ◽

2021 ◽

Vol 143 (6) ◽

Author(s):

Sadok Sassi ◽

Jamil Renno ◽

Han Zhou ◽

Amr Baz

Keyword(s):

Oil And Gas ◽

Axial Loading ◽

Drill String ◽

Drilling Process ◽

Oil And Gas Fields ◽

String Vibrations ◽

Wide Range ◽

Vibration Transmissibility ◽

Drilling Operations ◽

Gas Fields

Abstract During the drilling process in oil and gas fields, slender drill strings often experience a multitude of complex and simultaneous vibrational phenomena. Drill string vibrations hinder the drilling process and can cause premature wear and damage to the drilling equipment. Here, the suppression of drill string vibrations during drilling operations is experimentally investigated using a novel drill string design, based on the use of innovative periodic inserts that control the vibration transmissibility in different directions. These inserts are equipped with viscoelastic rings that act as sources of local resonances, surrounding piezoelectric actuators that generate internal axial loading when electrically excited. An experimental prototype that combined all these details was constructed and tested to demonstrate the periodic drill string's feasibility and effectiveness in minimizing undesirable vibrations. The obtained results indicate that the periodic inserts’ careful design can effectively enhance the drill strings’ dynamic behavior and conveniently regulate its bandgap characteristics. Both radial and axial vibrations were controlled, and the vibrations’ amplitude was reduced significantly over a wide range of frequencies. The proposed approach appears to present a viable means for designing intelligent drill strings with tunable bandgap characteristics.

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Ecological and geological problems of development of oil and gas fields in the Caspian region

10.12737/24289 ◽

2017 ◽

Author(s):

Oleg Serebryakov

Keyword(s):

Graduate Students ◽

Oil And Gas ◽

Raw Materials ◽

Oil And Gas Industry ◽

Industrial Workers ◽

Oil And Gas Fields ◽

Wide Range ◽

Exploration And Production ◽

Underground Disposal ◽

Gas Fields

The paper summarizes and examined extensive evidence on the environmental, geological and technological challenges of exploration and production of oil and gas, encountered during the development of the gigantic fields. Investigated environmental problems of underground disposal of wastes, the formation of zones of technogenic pollution, ecology megalonyx pressures and many others. Describes the environmental effects of oil and gas companies on the environment. The proposal for reducing the negative anthropogenic influence on the geoecological conditions of the environment. Justified the monitoring of the exploration and exploitation of deposits of natural raw materials. Is designed to masters, post-graduate students and students studying on the specialty "Environmental Geology", "Geology and Geochemistry of combustible minerals", "Geology of marine oil and gas fields", "Hydrogeology and engineering Geology", a wide range of scientific and industrial workers of the oil and gas industry, high school teachers and graduate students geoenvironmental, environmental, oil and gas fields.

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Oil and Gas Wells: Enhanced Wellbore Casing Integrity Management through Corrosion Rate Prediction Using an Augmented Intelligent Approach

Sustainability ◽

10.3390/su11030818 ◽

2019 ◽

Vol 11 (3) ◽

pp. 818 ◽

Cited By ~ 5

Author(s):

Dhafer A. Al-Shehri

Keyword(s):

Corrosion Rate ◽

Fresh Water ◽

Oil And Gas ◽

Carbonate Reservoir ◽

Validation Dataset ◽

Gas Wells ◽

Wide Range ◽

Oil And Gas Wells ◽

Integrity Management ◽

Metal Casing

Wellbore integrity management for oil and gas wells plays a vital role throughout the typical lifespan of a well. Downhole casing leaks in oil- and gas-producing wells significantly affect their shallow water horizon, the environment, and fresh water resources. Additionally, downhole casing leaks may cause seepage of toxic gases to fresh water zones and the surface, through the casing annuli. Forecasting of such leaks and proactive measures of prevention will help eliminate their consequences and, in turn, better protect the environment. The objective of this study is to formulate an effective, robust, and accurate model for predicting the corrosion rate of metal casing string using artificial intelligence (AI) techniques. The input parameters used to train AI models include casing leaks, the percentage of metal loss, casing age, and average remaining barrier ratio (ARBR). The target parameter is the corrosion rate of the metal casing string. The dataset from which the AI models were trained was comprised of 250 data points collected from 218 wells in a giant carbonate reservoir that covered a wide range of practically reasonable values. Two AI tools were used: artificial neural networks (ANNs) and adaptive network-based fuzzy inference systems (ANFISs). A prediction comparison was made between these two tools. Based on the minimum average absolute percentage error (AAPE) and the highest coefficient of determination (R2) between the measured and predicted corrosion rate values, the ANN model proposed here was determined to be best for predicting the corrosion rate. An ANN-based empirical model is also presented in this study. The proposed model is based on the associated weights and biases. After evaluating the new ANN equation using an unseen validation dataset, it was concluded that the ANN equation was able to make predictions with a significantly lower AAPE and higher R2. Use of the proposed new equation is very cost-effective in terms of reducing the number of sequential surveys and experiments conducted. The proposed equation can be utilized without an AI engine. The developed model and empirical correlation are very promising and can serve as a handy tool for corrosion engineers seeking to determine the corrosion rate without training an AI model.

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Designing, Making, and Testing Syntactic Foam of Precisely Controlled Hydrostatic Strength

Volume 3: Materials Technology; Ocean Engineering; Polar and Arctic Sciences and Technology; Workshops ◽

10.1115/omae2003-37199 ◽

2003 ◽

Cited By ~ 5

Author(s):

Wen-Tsuen Wang ◽

Lou Watkins

Keyword(s):

Oil And Gas ◽

Syntactic Foam ◽

Confined Space ◽

Foam Material ◽

Gas Wells ◽

Wide Range ◽

Oil And Gas Wells ◽

Temperature And Pressure ◽

Offshore Oil And Gas ◽

Offshore Oil

This paper describes a recently developed syntactic foam material designed to collapse under precisely defined conditions of temperature and pressure to protect ultra-deep high pressure offshore oil and gas wells. Each grade of syntactic foam is engineered to have a specific set of characteristics, tailored for the region of the well it occupies. In the startup phase, the materials remain intact, with no significant volume change. As pressure and temperature in the well rise during operations, the materials begin to compress and relieve pressure in the narrow, confined space of the annulus. Finally, when conditions reach preset limits, the syntactic foam undergoes a sudden and dramatic collapse, preventing excessive overpressure, and protecting the steel casing. An important advantage of this material is that it is passive, requiring no controls or active intervention. It responds automatically to protect the well casing from overpressures and temperature spikes. The properties of the material can be adjusted to suit a wide range of conditions inside a given well, or from one well to another.

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Mineral oil: the development of ideas about the inorganic origin of oil and gas deposits

10.12737/1206680 ◽

2021 ◽

Author(s):

Yuriy Pikovskiy

Keyword(s):

Oil And Gas ◽

Mineral Oil ◽

Close Attention ◽

Modern Times ◽

Oil And Gas Fields ◽

Wide Range ◽

History Of ◽

Hydrocarbon Gas ◽

Origin Of Oil ◽

Gas Fields

The widely accepted theory of the organic origin of oil and gas accumulations is practically not used to select promising areas and places for exploratory drilling. This makes us pay close attention to the alternative mineral concept of the genesis of these minerals. The purpose of the book is to show how ideas about the deep inorganic origin of accumulations of oil and hydrocarbon gas developed from antiquity to modern times, before the creation of modern mineral theory. The importance of mineral theory for forecasting large oil and gas fields, as well as for optimizing oil and gas geoecology is shown. For a wide range of readers interested in the origin of oil and gas fields, as well as the history of the development of this field of knowledge.

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