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Collaborating Authors
Remediation and land reclamation
This one day training course focuses on the repair of channels, voids and leaks in a cemented wellbore. Poor cement coverage and lack of zonal isolation in the casing-borehole annulus often leads to production of undesired fluids and reduced hydrocarbons production, disposal problems, reservoir pressure decline, loss of hydrocarbon reserves and other problems. Objective of the course is to evaluate and discuss various technologies used to repair wellbore communication paths due to wellbore aging that can develop allowing fluid to migrate from the high pressure downhole strata through leakage paths in the cement containment. Poor cement coverage and inadequate zonal isolation affects nearly every aspect of a well during its life. This course will give participants a better understanding of some critical well safety and integrity issues and methods to repair wells that have reliability issues, including sustained casing pressure (SCP).
- Production and Well Operations (1.00)
- Management > Professionalism, Training, and Education (0.92)
- Well Completion > Completion Installation and Operations (0.71)
- Health, Safety, Environment & Sustainability > Environment > Remediation and land reclamation (0.46)
This course examines methods for detecting fluid channels, voids and leaks, and how to repair them. It also covers the logging tools and technologies use to evaluate the integrity of the cement prior to initial completion or anytime during the life of the well. The first day of class is dedicated to evaluating cement and the second day to repairs. Poor cement coverage affects nearly every aspect of a well. This course will give you a better understanding of some critical well safety and integrity issues.
- Management > Professionalism, Training, and Education (0.94)
- Well Completion > Completion Installation and Operations (0.72)
- Health, Safety, Environment & Sustainability > Environment > Remediation and land reclamation (0.46)
- Well Drilling > Casing and Cementing > Cement and bond evaluation (0.42)
Bob Gallagher joined Thermo Fisher Scientific as the product line manager for the Industrial Hygiene Strategy at the end of 2017. Gallagher has over 35 years of experience in engineering and product management roles in the area of LDAR, site remediation, dust monitoring and other various industrial applications. Over his career, he's worked for various technical companies such as Texas Instruments and Pentair and has successfully launched several innovative global products. He has a BS in materials science and engineering from Penn State University and an MBA from Boston University.
Groundwater remediation is the process that is used to treat polluted groundwater by removing the pollutants or converting them into harmless products. Groundwater is water present below the ground surface that saturates the pore space in the subsurface. Globally, between 25 per cent and 40 per cent of the world's drinking water is drawn from boreholes and dug wells.[1] Groundwater is also used by farmers to irrigate crops and by industries to produce everyday goods. Most groundwater is clean, but groundwater can become polluted, or contaminated as a result of human activities or as a result of natural conditions.
- Water & Waste Management (0.41)
- Food & Agriculture > Agriculture (0.39)
- Information Technology > Knowledge Management (0.40)
- Information Technology > Communications > Collaboration (0.40)
The focus of Dr. Ajo-Franklin's research program is the use of geophysical methods to understand the spatial and temporal dynamics of subsurface processes relevant to energy and environmental applications including (but not limited to) fluid flow and structural alteration of the porous matrix e.g. His work encompasses a wide variety of techniques and length scales ranging from monitoring pore-scale transformations using synchrotron micro-tomography (10 -6 m) to using timelapse borehole seismic measurements to characterize changes in reservoir properties (10 3 m). While he is currently involved in quite a few projects, about half are related to understanding and utilizing the geophysical signature of CO2 in the subsurface to enable monitoring of geologic carbon sequestration. The remainder of his projects delve into geophysically monitoring microbially-induced transformations, particularly as related to site remediation and enhanced hydrocarbon recovery. Jonathan B. Ajo-Franklin, Thomas M. Daley, Yuxin Wu, Susan S. Hubbard, John Peterson,Belinda Butler-Veytia, and Bob Kelley received 2011 Best Paper Presented at the Annual Meeting for their paper Multi-level continuous active source seismic monitoring (ML-CASSM): Mapping shallow hydrofracture evolution at a TCE contaminated site.
- Reservoir Description and Dynamics > Storage Reservoir Engineering > CO2 capture and sequestration (1.00)
- Health, Safety, Environment & Sustainability > Environment > Climate change (1.00)
- Reservoir Description and Dynamics > Reservoir Characterization > Seismic processing and interpretation (0.89)
- Health, Safety, Environment & Sustainability > Environment > Remediation and land reclamation (0.64)
- Information Technology > Knowledge Management (0.40)
- Information Technology > Communications > Collaboration (0.40)
Abstract Historical oil and gas exploration and development in the northeastern United States left behind hundreds of thousands of orphaned oil and gas wells in areas where hydrocarbon extraction predated state and federal regulations on well abandonment. Abandoned by their original operators with incomplete records of location and well status, orphaned wells pose significant economic and environmental challenges associated with possible emissions of formation liquids and gases. Effective location and assessment of orphaned wells is a key first step in well site remediation; however, the task of locating orphaned wells has proven to be a formidable challenge in some of the most impacted areas. Specifically, in key areas of the northeastern United States, where the oil and gas industry first emerged in the late 19th and early 20th centuries, historical lease maps have proven largely inaccurate, and wide-area terrestrial geophysical surveys in difficult terrain characteristics and dense vegetation were found to be cost-prohibitive. In recent years, integration of miniaturized magnetic sensors with low-altitude uncrewed aerial vehicles (UAVs) facilitated successful implementation of wide-area aeromagnetic surveys targeting orphaned well identification in areas where piloted aeromagnetic surveys were previously infeasible due to challenging terrain and canopy conditions. Aeromagnetic data sets collected by ultra-low-altitude UAV surveys and processed to highlight magnetic anomalies associated with orphaned well casings have the potential to drastically reduce search areas for orphaned wells and complement ground surveys, thus helping turn the tide in orphaned well remediation efforts. As UAV-based aeromagnetic surveys gain recognition as a dependable wide-area surveying tool for remote identification of orphaned well sites, we highlight key advantages and important limitations of this methodology, underscore key practical challenges to successful implementation, and outline best practices in effective survey design and execution.
- Government > Regional Government > North America Government > United States Government (1.00)
- Energy > Oil & Gas > Upstream (1.00)
- Reservoir Description and Dynamics > Reservoir Characterization (1.00)
- Health, Safety, Environment & Sustainability > Environment > Remediation and land reclamation (1.00)
- Management > Professionalism, Training, and Education > Communities of practice (0.71)
- Data Science & Engineering Analytics > Information Management and Systems > Knowledge management (0.71)
Restoring Well Production by Replacing the Damaged Area with a Thermally Operated Bismuth Alloy: a Cure for Leakage
Al Marhoon, Z. A. (EXPEC Advanced Research Center, Saudi Aramco, Dhahran, Saudi Arabia) | Shearer, D. (Wellbore Integrity Solutions, Houston, USA) | Alsharaawi, A. O. (EXPEC Advanced Research Center, Saudi Aramco, Dhahran, Saudi Arabia) | Swadi, S. (Wellbore Integrity Solutions, Houston, USA)
Abstract Sustained casing pressure (SCP) is a common problem throughout the oil and gas industry. Many wells will suffer from the problem at some point during their lifetime(Rocha-Valadez et al., 2014). Currently, there are several methods available to remediate SCP. However, there are several factors that determine the remediation approach. These can include but are not limited to the source of the pressure, the location of the pressure i.e. which annulus or combination of annulus, the well construction design, the life cycle stage of the well, the barriers in place and the companies/regulatory policies etc. Whilst not all SCP issues are the result of leaks in casing, liners or the cement that had has been used to provide zonal isolation, this paper is primarily focused on these types of issues. The primary objective of cementing is to provide zonal isolation, such that downhole fluids are prevented from flowing into the casing annuli and potentially to the surface. The exception being for the production flow path. Such isolation is part of well integrity (NORSOK, 2004). Any event/incident that damages the sealability of cement or causes downhole fluids to flow to the surface behind casing strings jeopardizes the integrity of the well. These events lead to SCP and may require a shut-in of the well if not cured. The objective of this paper is to discuss yard tests of Bismuth alloy as a treatment for SCP. The Bismuth alloy will be a gas tight sealant at the fluid leakage source location.
- Asia > Middle East > Saudi Arabia (0.47)
- North America (0.46)
- Well Drilling > Casing and Cementing > Casing design (0.91)
- Well Completion > Well Integrity (0.90)
- Well Completion > Completion Installation and Operations (0.88)
- Health, Safety, Environment & Sustainability > Environment > Remediation and land reclamation (0.71)
System of Highway Slope Disaster Information Collection, Integration, Simulation and Judgement
Chiu, Chia-Chi (National Taipei University of Technology, Taiwan) | Shiu, Wen-Jie (Sinotech Engineering Consultants Inc., Taiwan) | Lee, Ching-Fang (Sinotech Engineering Consultants Inc., Taiwan) | Weng, Meng-Chia (National Yang Ming Chiao Tung University, Taiwan) | Yang, Che-Ming (National United University, Taiwan)
ABSTRACT: Landslide and rockfall disasters frequently occur on road systems. Therefore, analyzing the disaster rapidly and deciding on the remediation method, is the key to reducing the loss. We have developed a ‘Highway slope disaster information collection, integration, simulation and judgment system’ which has three parts: (1) Geohazard rapid report system; (2) Multidisciplinary geological survey; and (3) Site-specific landslide simulation. This paper focuses on theYusui Stream debris flow and the disaster of the Minbaklu bridge as case studies to demonstrate the application of the aforementioned three components in disaster assessment. The key factor such as geological, terrain, distribution of weak plane, volume, process, and landslide mechanism, and finally provide a disaster report to concerned units for the assistance in follow-up decisions. INTRODUCTION Mountains comprise around 70% of Taiwan, necessitating that roads and railways have to follow the terrain of the mountains and rivers. However, Taiwan is situated in a plate boundary zone and a monsoon climate zone, which can lead to immature geology and extreme weather conditions. As a result, road slope disasters occur, damaging the transportation system. However, as transportation should not be interrupted, it is crucial to urgently address the research tasks of quickly detect road slope disasters, planning effective investigation operations, analyzing the triggering factors, providing rescue strategies, and suggesting remediation engineering designs. Therefore, we developed a highway slope disaster analysis procedure with up-to-date technologies called "GeoPORT", which is a combination of the words "Geohazards" and "Report". The program integrates many new technologies for slope disaster analysis, including a geohazard early warning system, multi-scale geological surveys, and full-scale numerical simulations, and has practiced the investigation procedure on several cases. When a highway or road slope disaster occurs, we will immediately integrate high-precision topographical, geological, mechanical, and hydrological data and other information to quickly collect post-disaster information such as topography, landslide volume, influenced area, triggering factors, etc. Further, the information will be used to analyze the collapse mechanism to suggest subsequent engineering remediation.
- Energy > Oil & Gas > Upstream (0.71)
- Transportation (0.55)
- Reservoir Description and Dynamics > Reservoir Characterization (0.97)
- Health, Safety, Environment & Sustainability > Environment > Remediation and land reclamation (0.96)
- Data Science & Engineering Analytics > Information Management and Systems (0.89)
ABSTRACT: Heligoland is a German offshore island located about 50 km from the German coastline in the North Sea. Storm surges, especially in 1954, caused massive destruction and damage to the jetties and seawalls. Moreover, the "Big Bang" blast in 1947 as well as wartime bombardments lead to extensive rock fracturing. Due to these impacts the jetties and seawalls displayed serious structural deficiencies, such as differential settlements and potential instabilities. Against this background, a site investigation was carried out for the geotechnical design of the remedial measures. Special drilling rigs were used, equipped with an interchangeable drill head for both sonic and wireline drilling methods while incorporating an automatic drilling data acquisition system. This allowed high quality structural and rock cores and samples to be obtained in accordance with sampling and testing standards. PROJECT OVERVIEW Heligoland is a German offshore island located about 50 km from the German coastline in the North Sea. It is the only rocky island in the German Bight and owes its formation to vertical uplifting of Triassic sandstones of the "Buntsandstein" due to diapiric rise of underlying evaporites of the "Zechstein" basin. Most of the todays shore protection in the west of the island and the large jetties and seawalls where constructed between 1903 and 1927, when emperor Wilhelm II had turned Heligoland into a navy base. After World War I major parts of the western jetty were rebuilt resulting in the todays shape (figure 1). World War II and storm surges, especially in 1954, caused massive destruction and damage to the jetties and seawalls. Moreover, the "Big Bang" blast in 1947 as well as wartime bombardments lead to extensive rock fracturing. Due to these impacts the jetties and seawalls displayed serious structural deficiencies, such as differential settlements and potential instabilities, the remediation of jetties and seawalls are required. Against this background, a site investigation for the geotechnical design of the remedial measures was set-up. It focused on detailed examination of the condition of the current structures, the foundation base and of the quality of the underlying rock. The investigation aimed at providing information on possible doline structures, sinkholes and the presence of potentially sensitive sedimentary deposits such as shales and sandstones with intercalated evaporite layers.
- Geology > Rock Type > Sedimentary Rock > Clastic Rock > Sandstone (0.45)
- Geology > Rock Type > Sedimentary Rock > Clastic Rock > Mudrock (0.36)
- Well Completion > Hydraulic Fracturing (1.00)
- Reservoir Description and Dynamics > Reservoir Characterization (0.69)
- Health, Safety, Environment & Sustainability > Environment > Remediation and land reclamation (0.62)
- Well Drilling > Drilling Operations > Coring, fishing (0.52)
Design Review of the Remediation Project of a Highly Weathered Open Pit Wall from a Closed Iron Ore Mine in Brazil
Maia, José Allan C. (Vale S.A., Brazil) | Costa, Teófilo (Vale S.A., Brazil) | Fonini, Anderson (FGS Geotecnia, Brazil) | Gobbi, Felipe (FGS Geotecnia, Brazil) | Menezes, Ricardo (FGS Geotecnia, Brazil) | Sonaglio, Gonçalo (FGS Geotecnia, Brazil) | Madrid, Fabiano (FGS Geotecnia, Brazil)
ABSTRACT: In the late 90s, the excavation of an open pit mine was initiated in the Iron Quadrangle, a rich iron ore region situated in southeast Brazil. During years of excavation and mining duties, but especially after reaching its maximum depth, many instabilities occurred in the north wall, which presents about 500 m height and overall slope inclination that fluctuates between 30° to 35°. In the 2010s, a Real Aperture Radar and a series of prisms distributed across this wall indicated a total displacement of about 65 cm in 120 days during severe rainstorms. More recently, in the 2020s, InSAR data have shown that the displacements are still occurring after many slope failures, especially during the rainy season. As a result, the extensive erosion process accelerated the wall unloading generating a net of several unstable surfaces (comprising millions of cubic meters) controlled by the regional structural setting. Thus, during the design review of the remediation project, according to the reduced data available, several analyses were conducted to confirm the geotechnical parameters obtained from field and lab tests and assess the failure depth from back analyses. Finally, the design review service shows that the remediation proposed by the basic design could no longer address effective treatments for the decommissioning design of the north wall, but the remediation actions are still valid. INTRODUCTION The mine is localised in the northeast of a region known as Quadrilátero Ferrífero, a mineral-rich zone situated in the southeast of Brazil where the rainy season is well established over four months with cumulative precipitation over two thousand millimetres. The first reports of mineral exploration in the mine date back to the 18 century (around 1745) as a gold panning using enslaved labour. In the 19 century, gold production dramatically reduced to just a few grams, paralysing the mine for several decades. However, in the late 20 century, a mining company expanded a narrow ancient gold mine into a world-class iron ore open pit. It operated until 2015, when the mine was declared closed and a legacy mine, about 350 Mt of iron ore had been extracted from the mine in this period.