Wellbore Evaluation of the Basal Cambrian System

Glazewski, Kyle A.; Hamling, John A.; Peck, Wesley D.; Doll, Thomas; Laumb, Jason D.; Gorecki, Charles D.; Steadman, Edward N.; Harju, John A.

doi:10.1016/j.egypro.2014.11.604

Cited by 5 publications

(5 citation statements)

References 15 publications

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“…The proposed well integrity indicator should consider the existing body of knowledge for geologic confining layers, the number of existing wells in the immediate area, the condition of those existing wells, and uncertainty about the wellbore information (especially missing information). The rating process followed other research to apply systematic methods to evaluate wellbore integrity in hydrocarbon fields and CO 2 storage areas (Glazewski et al, 2013;Annandale and Conway, 2009;Haga et al, 2009;Corneliussen et al, 2007;Wakama and Adeniyi, 2004).…”

Section: Methodsmentioning

confidence: 99%

Approach for Assessing Wellbore Integrity to Prioritize Study Areas for Potential Siting of a Carbon Dioxide Repository

Buxton¹,

Weber²,

Moody³

et al. 2015

SPE Eastern Regional Meeting

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In this paper we present a proposed semi-quantitative approach for assessing the integrity of active and retired oil and gas wells in example study areas for siting geologic carbon storage repositories. The approach makes use of readily available wellbore information and is illustrated with study areas in Ohio and Michigan. Results help depict wellbore integrity issues in a region that has numerous oil and gas wells dating back to the 1800s. We first reviewed readily available sources of information and identified three key well condition indicators that might be expected to impact wellbore integrity -wellbore age, depth and status. Each of these indicators was then coded for each available well with a simple scale representing increasing levels of expected wellbore integrity and combined to form a composite integrity score. The resulting composite indicators provide a useful tool to help identify areas where existing wells tend to be newer, shallower, and plugged and abandoned-all of these being conditions more favorable for repository siting. When considered in combination with maps showing the depth of targeted geologic confining layers and maps indicating the density of existing wells (i.e., the number of existing wells per 1 km 2 grid cell), the maps of wellbore integrity provide a more complete evaluation of different areas for repository siting. Study areas in Ohio and Michigan were evaluated and pros and cons of each area are discussed to help illustrate the utility of this proposed wellbore integrity approach. The approach proposed here makes use of reasonably extensive and readily available information, and combines it in a systematic and objective way, creating an intuitive tool to assist with repository siting.

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Section: Methodsmentioning

confidence: 99%

Approach for Assessing Wellbore Integrity to Prioritize Study Areas for Potential Siting of a Carbon Dioxide Repository

Buxton¹,

Weber²,

Moody³

et al. 2015

SPE Eastern Regional Meeting

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show abstract

“…The proposed well integrity indicator should consider the existing body of knowledge including area geology, the number of existing wells in the immediate area, the condition of those existing wells, and uncertainty about the wellbore information (especially missing information). The rating process followed other research to apply systematic methods to evaluate wellbore integrity in hydrocarbon fields and CO 2 storage areas …”

Section: Well Record Analysismentioning

confidence: 99%

Comparative wellbore integrity evaluation across a complex of oil and gas fields within the Michigan Basin and implications for CO₂storage

et al. 2016

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Wellbore integrity is a fundamental aspect of site characterization and selection for storage in areas with existing or abandoned oil and gas wells. The condition of well cement, installed casing strings, and plugs determine if a well can sustain optimal hydrostatic pressures and prevent fluid migration. This is a necessary but underappreciated aspect of assessing potential storage sites when optimal and sustainable pressure conditions are critical for success. To apply the systematic wellbore integrity evaluation to realistic CO2 storage conditions, seven fields in the Michigan Basin were selected which were actively being used for CO2 injection for enhanced oil recovery. Data on wellbore construction were collected for wells on and surrounding the reefs and were evaluated to determine the overall condition of boreholes in the study area using EPA guidelines and industry standards. Available cement bond logs were also reviewed to assess the quantity and quality of cement in the wells. The majority of the wells in the study area were shallow and did not penetrate the confining layers, thus, posing little to no risk. Most of the deep wells demonstrated sufficient plugs and cement quality that meet the desired standards. Some wells have missing or incomplete records and inadequate cement and/or plugs making them candidates for further evaluation, should large‐scale CO2 storage be considered in the area. The results of the study show that readily available well records and cement bond logs can be used to efficiently evaluate and characterize CO2 storage study sites for overall wellbore integrity. © 2016 Society of Chemical Industry and John Wiley & Sons, Ltd.

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“…These wells are predominantly active producers as well. Regional data may be useful for CO 2 storage site screening and feasibility assessments . However, more site investigation would be required to fully assess wellbore status on a local scale.…”

Section: Spatial Analysis Of Wellbore Integrity Indicatorsmentioning

confidence: 99%

“…Therefore, a systematic review of the wells specifications is useful to describe well conditions on a regional basis, which may be useful for site screening and operations management. [6][7][8][9] Because oil and gas fields can contain thousands of wells, some wells may have poor cementing, inadequate plugging, or incomplete records. The condition of legacy oil and gas wells is particularly pertinent in the Midwest USA, which has some of the oldest oil and gas fields in the world.…”

Section: Wellbore Integrity Factorsmentioning

confidence: 99%

“…Most oil and gas wells are constructed and plugged to isolate hydrocarbon zones and protect near surface water resources, and these legacy wells may not be especially suited to preventing CO 2 migration in the subsurface. Therefore, a systematic review of the wells specifications is useful to describe well conditions on a regional basis, which may be useful for site screening and operations management …”

Section: Introductionmentioning

confidence: 99%

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Wellbore integrity factors for CO₂ storage in oil and gas producing areas in the Midwest United States

et al. 2016

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The condition of legacy oil and gas wells is an important issue for geologic CO 2 storage projects. Many regions with large CO 2 point sources coincide with historical oil and gas fields. This is especially apparent in the Midwestern United States, where over one million oil and gas wells are present dating back to the late 1800s. To investigate wellbore integrity factors in this region, the condition of oil and gas wells in Michigan and Ohio was summarized based on well status, depth, construction, age, and plugging specifications. To better understand the impact of well integrity on a local scale, six test study areas were also analyzed. These hypothetical test study areas were based on subsurface area necessary for an industrial scale CO 2 storage application. Detailed records were used to categorize well conditions, and corrective actions necessary to repair the wells were then assigned. The results of the test study area analysis provide a real representation of the level of effort necessary to prepare sites for CO 2 storage. Actions may involve relatively low-effort tasks to examine wellheads or more extensive well re-entry and plugging. The analysis indicated that many areas may have hundreds of wells, but no wells penetrating the deeper CO 2 storage zones. At sites where many wells require corrective action, it may be challenging to efficiently plug and abandon wells. Options such as testing wellhead pressures, surface monitoring of CO 2 leakage, and less extensive plugging requirements may help offset costs associated with remediating a large number of wells. C

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Wellbore Evaluation of the Basal Cambrian System

Cited by 5 publications

References 15 publications

Approach for Assessing Wellbore Integrity to Prioritize Study Areas for Potential Siting of a Carbon Dioxide Repository

Approach for Assessing Wellbore Integrity to Prioritize Study Areas for Potential Siting of a Carbon Dioxide Repository

Comparative wellbore integrity evaluation across a complex of oil and gas fields within the Michigan Basin and implications for CO₂storage

Wellbore integrity factors for CO₂ storage in oil and gas producing areas in the Midwest United States

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Wellbore Evaluation of the Basal Cambrian System

Cited by 5 publications

References 15 publications

Approach for Assessing Wellbore Integrity to Prioritize Study Areas for Potential Siting of a Carbon Dioxide Repository

Approach for Assessing Wellbore Integrity to Prioritize Study Areas for Potential Siting of a Carbon Dioxide Repository

Comparative wellbore integrity evaluation across a complex of oil and gas fields within the Michigan Basin and implications for CO2storage

Wellbore integrity factors for CO2 storage in oil and gas producing areas in the Midwest United States

Contact Info

Product

Resources

About

Comparative wellbore integrity evaluation across a complex of oil and gas fields within the Michigan Basin and implications for CO₂storage

Wellbore integrity factors for CO₂ storage in oil and gas producing areas in the Midwest United States