Application of Variable Formation Compressibility for Improved Reservoir Analysis

Yale, David P.; Nabor, G.W.; Russell, John A.; Pham, Hong-Danh; Yousef, Mohammed

doi:10.2523/26647-ms

Cited by 9 publications

(2 citation statements)

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“…Simon Sandstone is 3.71 × 10 −10 Pa −1 in deeper areas of central Illinois and 6.0 × 10 −10 Pa −1 in shallower areas of southeastern Wisconsin (Birkholzer et al 2008). These calculated values of large‐scale pore compressibility are within the range of pore compressibility reported for well‐consolidated sandstones (Yale et al 1993, Figure 3) at in situ effective stresses representative of Mt. Simon.…”

Section: Site Description Of the Illinois Basinsupporting

confidence: 81%

Modeling Basin‐ and Plume‐Scale Processes of CO₂ Storage for Full‐Scale Deployment

Zhou¹,

Birkhölzer²,

et al. 2010

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Integrated modeling of basin-and plume-scale processes induced by full-scale deployment of CO 2 storage was applied to the Mt. Simon aquifer in the Illinois Basin. A 3D mesh was generated with local refinement around 20 injection sites, with ~30 km spacing. A total annual injection rate of 100 Mt CO 2 over 50 years was employed. The CO 2 -brine flow at the plume scale and the single-phase flow at the basin scale were simulated. Simulation results show the overall shape of a CO 2 plume consisting of a typical gravity-override subplume in the bottom injection zone of high injectivity and a pyramid-shaped subplume in the overlying multilayered Mt. Simon, indicating the important role of a secondary seal with relatively low permeability and high entry capillary pressure. The secondary seal effect is manifested by retarded upward CO 2 migration as a result of multiple secondary seals, coupled with lateral preferential CO 2 viscous fingering through high-permeability layers. The plume width varies from 9.0 to 13.5 km at 200 years, indicating the slow CO 2 migration and no plume interference between storage sites. On the basin scale, pressure perturbations propagate quickly away from injection centers, interfere after less than a year, and eventually reach basin margins.The simulated pressure buildup of 35 bar in the injection area is not expected to affect caprock geomechanical integrity. Moderate pressure buildup is observed in Mt. Simon in northern Illinois. However, its impact on groundwater resources is less than the hydraulic drawdown induced by long-term extensive pumping from overlying freshwater aquifers.

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Section: Site Description Of the Illinois Basinsupporting

confidence: 81%

Modeling Basin‐ and Plume‐Scale Processes of CO₂ Storage for Full‐Scale Deployment

Zhou¹,

Birkhölzer²,

et al. 2010

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“…Dudley et al (1994) observed similar behavior in saturated Gulf of Mexico turbidite sands under uniaxial strain conditions and modeled the creep strain using a power law function of time. Yale et al (1993) observed creep strain in the form of stress-rate effects in compaction experiments on unconsolidated sands.…”

Section: Introductionmentioning

confidence: 87%

Viscous deformation of unconsolidated reservoir sands—Part 1: Time‐dependent deformation, frequency dispersion, and attenuation

Hagin

Zoback

2004

GEOPHYSICS

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Laboratory experiments on dry, unconsolidated sands from the Wilmington field, California, reveal significant viscous creep strain under a variety of loading conditions. In hydrostatic compression tests, following initial loading to 10 MPa, the creep strain that accompanies 5-MPa loading steps to 15, 20, 25, and 30 MPa exceeds the magnitude of the instantaneous strain (∼3 × 10 −3 ). We observed a two-fold increase in bulk modulus with frequency over the range of frequencies tested (10 −6 to 10 −2 Hz), which is consistent with a viscoelastic rheology of unconsolidated sand. The data demonstrate that the effective static bulk modulus is approximately one-third of that at seismic frequencies. By measuring the phase lag between stress and strain during the loading cycles, we were also able to show that inelastic attenuation is nearly constant (Q ≈ 5) over the four-decade range of frequencies tested at a strain amplitude of 10 −3 . Interestingly, the viscous effects only appear when loading a sample beyond its preconsolidation. Triaxial tests show that the relationship between differential stress and axial strain is positively dependent on axial strain-rate, and that unconsolidated sand continues to deform viscously even at large strains (∼7%). All experiments were conducted at room temperature and humidity. A limited number of experiments with unconsolidated reservoir sand from the Gulf of Mexico show similar behavior.

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Research Frontiers and Progress in Dynamic Reserve Evaluation Using the Material Balance Method

Li,

Lyu,

Cao

2024

Springer Series in Geomechanics and Geoengineering

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Application of Variable Formation Compressibility for Improved Reservoir Analysis

Cited by 9 publications

References 0 publications

Modeling Basin‐ and Plume‐Scale Processes of CO₂ Storage for Full‐Scale Deployment

Modeling Basin‐ and Plume‐Scale Processes of CO₂ Storage for Full‐Scale Deployment

Viscous deformation of unconsolidated reservoir sands—Part 1: Time‐dependent deformation, frequency dispersion, and attenuation

Research Frontiers and Progress in Dynamic Reserve Evaluation Using the Material Balance Method

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Application of Variable Formation Compressibility for Improved Reservoir Analysis

Cited by 9 publications

References 0 publications

Modeling Basin‐ and Plume‐Scale Processes of CO2 Storage for Full‐Scale Deployment

Modeling Basin‐ and Plume‐Scale Processes of CO2 Storage for Full‐Scale Deployment

Viscous deformation of unconsolidated reservoir sands—Part 1: Time‐dependent deformation, frequency dispersion, and attenuation

Research Frontiers and Progress in Dynamic Reserve Evaluation Using the Material Balance Method

Contact Info

Product

Resources

About

Modeling Basin‐ and Plume‐Scale Processes of CO₂ Storage for Full‐Scale Deployment

Modeling Basin‐ and Plume‐Scale Processes of CO₂ Storage for Full‐Scale Deployment