Reservoir Characterization Of Fractured Reservoirs In Western Canada

Carlson, M.R.

doi:10.2118/99-13-64

Cited by 8 publications

(2 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Others are those depicting: linear/pseudoradial flow (Gringarten et al (1975)) for single vertical and horizontal fractures (SVF and SHF); pseudo-equilibrium and delayed yield effects (Boulton 1954;Neuman 1972 andStrelsova 1976); generalized radial flow in single-and double-porosity fractured aquifers (Barker 1988); and leaky aquifers (Hantush (1960) and Moench (1985) . Dual-porosity responses have been described by Moench (1984) and Dougherty and Babu (1984); however, Odeh (1965) and Carlson (1999) have indicated that they may be scale dependent.…”

Section: Analytical Techniquesmentioning

confidence: 99%

Reliable yields of public water-supply wells in the fractured-rock aquifers of central Maryland, USA

Hammond¹

2017

Hydrogeol J

View full text Add to dashboard Cite

Most studies of fractured-rock aquifers are about analytical models used for evaluating aquifer tests or numerical methods for describing groundwater flow, but there have been few investigations on how to estimate the reliable long-term drought yields of individual hard-rock wells. During the drought period of 1998 to 2002, many municipal water suppliers in the Piedmont/Blue Ridge areas of central Maryland (USA) had to institute water restrictions due to declining well yields. Previous estimates of the yields of those wells were commonly based on extrapolating drawdowns, measured during short-term singlewell hydraulic pumping tests, to the first primary water-bearing fracture in a well. The extrapolations were often made from pseudo-equilibrium phases, frequently resulting in substantially over-estimated well yields. The methods developed in the present study to predict yields consist of extrapolating drawdown data from infinite acting radial flow periods or by fitting type curves of other conceptual models to the data, using diagnostic plots, inverse analysis and derivative analysis. Available drawdowns were determined by the positions of transition zones in crystalline rocks or thin-bedded consolidated sandstone/limestone layers (reservoir rocks). Aquifer dewatering effects were detected by type-curve matching of step-test data or by breaks in the drawdown curves constructed from hydraulic tests. Operational data were then used to confirm the predicted yields and compared to regional groundwater levels to determine seasonal variations in well yields. Such well yield estimates are needed by hydrogeologists and water engineers for the engineering design of water systems, but should be verified by the collection of longterm monitoring data.

show abstract

Section: Analytical Techniquesmentioning

confidence: 99%

Reliable yields of public water-supply wells in the fractured-rock aquifers of central Maryland, USA

Hammond¹

2017

Hydrogeol J

View full text Add to dashboard Cite

show abstract

“…The result was that there was a bimodal gas phase breakthrough curve with maximum concentrations occurring decades after a 1-year methane leak pulse. However, Odeh [29], Carlson [30], and Hammond [31] have indicated that double porosity responses may be scale dependent and only reflect conditions near a wellbore. Schout et al [32] constructed a flow and transport model to investigate methane migration in a 60 m thick unconsolidated sandy rock aquifer.…”

Section: Introductionmentioning

confidence: 99%

Pathways and Environmental Impacts of Methane Migration: Case Studies in the Marcellus Shale, USA

Hammond,

Wen,

Woda

et al. 2024

Geofluids

View full text Add to dashboard Cite

Gas migration incidents, particularly stream contamination cases, have been rarely investigated and gone through the peer review process, with the exception of three sites in northeast Pennsylvania (Dimock and two Sugar Runs in Lycoming and Bradford counties, respectively) where air emission surveys, dissolved methane measurements, and structural (hydro)geologic interpretations have been used to demonstrate potential environmental impacts due to shale gas operations. In addition to reviewing previously published work from these three sites, we report and analyze unpublished new data trying to determine if a direct relationship between methane migration, stream contamination, and air emissions exists at those sites. Our analysis indicates that subsurface methane migration, stream methane contamination, and air emissions might not be all present or detectable at a faulty/leaky shale gas well. Which of these signs of contamination, if any, exist is largely controlled by the local (hydro)geologic conditions. In each case, the most likely migration pathway was from gas charged zones up well annular spaces to confined permeable formations, then laterally to a direct discharge or by vertically controlled joints to streams, water wells, and the atmosphere. The confining units act as barriers to the buoyant movement of stray gases, allowing subsurface travel of gas for 1–4 km from a leaky gas well. The knowledge we learn from these three sites can guide the future investigations of methane contamination cases in other regions.

show abstract

A scaled perspective on permeability: How to get the best from what we have

Worthington¹

2017

Journal of Petroleum Science and Engineering

View full text Add to dashboard Cite

Reservoir Characterization Of Fractured Reservoirs In Western Canada

Cited by 8 publications

References 11 publications

Reliable yields of public water-supply wells in the fractured-rock aquifers of central Maryland, USA

Reliable yields of public water-supply wells in the fractured-rock aquifers of central Maryland, USA

Pathways and Environmental Impacts of Methane Migration: Case Studies in the Marcellus Shale, USA

A scaled perspective on permeability: How to get the best from what we have

Contact Info

Product

Resources

About