Critical pressure for gas storage in unlined rock caverns

Liang, Jinhuo; Lindblom, Ulf

doi:10.1016/0148-9062(94)90905-9

Cited by 16 publications

(6 citation statements)

References 3 publications

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“…Let us remember again that both the short-term failure conditions (22) and (23), and compressibilityidilatancy boundary (24), are incorporated in the constitutive equation (7) by the procedure used to determine the constitutive functions F and S. But the constitutive equation (7) allows us to determine even the evolution in time of dilatancy at each point in the dilatancy domain. For this purpose we can use for the irreversible volumetric strain a formula of the form34…”

Section: Creep and Creep Failurementioning

confidence: 99%

“…Figure 2 shows the stress distribution along the contour for the ratio of the far-field stresses gh/ov = 0.4 and for several internal applied pressures. The solid line is the short-term failure surface (22), the dash-dot line the compressibility/dilatancy boundary (24), whereas the dotted line is the initial yield surface. An isolated rhombus on the last line represents the initial stress state.…”

Section: Wide Rectangular-like Galleries or Cavernsmentioning

confidence: 99%

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Creep, damage and failure around large rectangular-like caverns and galleries

Cristescu¹,

Paraschiv

1996

Mech. Cohes.-Frict. Mater.

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Section: Creep and Creep Failurementioning

confidence: 99%

Section: Wide Rectangular-like Galleries or Cavernsmentioning

confidence: 99%

Creep, damage and failure around large rectangular-like caverns and galleries

Cristescu¹,

Paraschiv

1996

Mech. Cohes.-Frict. Mater.

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“…Therefore, according to Liang et al (1994), the critical gas pressure is equal to the water-curtain pressure (P wc ). Study cases are presented in Table 3.1.1.…”

Section: Study Casesmentioning

confidence: 99%

“…Several gas-containment criteria have been proposed, based on groundwater gradient or pressure (Liang et al, 1994). The most commonly used no-gas-leakage criterion is Åberg's (1977) vertical hydraulic gradient criterion, which states that the vertical hydraulic gradient be greater than 1.0.…”

Section: Introductionmentioning

confidence: 99%

“…The critical gas pressure is the maximum tolerable gas pressure for a given gas storage system at no -gas-leakage conditions (Liang et al, 1994). Liang et al (1994) performed groundwater simulation, and based on their comparison of gas pressure with groundwater pressure in the vicinity of caverns, they showed that: (a) under natural groundwater conditions (i.e., without a water curtain), the critical gas pressure is approximately linear and proportional to the natural groundwater head; and (b) with a water curtain, the critical gas pressure is equal to the water-curtain pressure, as long as the gas pressure is less than 1.0 − 1.5MPa above the hydrostatic pressure.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Simulations of Leakage from Underground LPG Storage Caverns

Yamamoto¹,

Pruess²

2004

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To secure a stable supply of petroleum gas, underground storage caverns for liquified petroleum gas (LPG) are commonly used in many countries worldwide. Storing LPG in underground caverns requires that the surrounding rock mass remain saturated with groundwater and that the water pressure be higher than the liquid pressure inside the cavern.In previous studies, gas containment criteria for underground gas storage based on hydraulic gradient and pressure have been discussed, but these studies do not consider the physicochemical characteristics and behavior of LPG such as vaporization and dissolution in groundwater. Therefore, while these studies are very useful for designing storage caverns, they do not provide better understanding of the either the environmental effects of gas contamination or the behavior of vaporized LPG.In this study, we have performed three-phase fluid flow simulations of gas leakage from underground LPG storage caverns, using the multiphase multicomponent nonisothermal simulator TMVOC (Pruess and Battistelli, 2002), which is capable of solving the three-phase nonisothermal flow of water, gas, and a multicomponent mixture of volatile organic chemicals (VOCs) in multidimensional heterogeneous porous media.A two-dimensional cross-sectional model resembling an actual underground LPG facility in Japan was developed, and gas leakage phenomena were simulated for three different permeability models: (1) a homogeneous model, (2) a single-fault model, and (3) a heterogeneous model. In addition, the behavior of stored LPG was studied for the special case of a water curtain suddenly losing its function because of operational problems, or because of long-term effects such as clogging of boreholes.The results of the study indicate the following: (1) The water curtain system is a very powerful means for preventing gas leakage from underground storage facilities. By operating with appropriate pressure and layout, gas containment can be ensured. (2) However, in highly heterogeneous media such as fractured rock and fault zones, local flow paths within which the gas containment criterion is not satisfied could be formed. To eliminate such zones, treatments such as pre/post grouting or an additional installment of water-curtain boreholes are essential. (3) Along highly conductive features such as faults, even partially saturated zones possess certain effects that can retard or prevent gas leakage, while a fully unsaturated fault connected to the storage cavern can quickly cause a gas blowout. This possibility strongly suggests that ensuring water saturation of the rock surrounding the cavern is a very important requirement. (4) Even if an accident should suddenly impair the water curtain, the gas plume does not quickly penetrate the ground surface. In these simulations, the plume takes several months to reach the ground surface.

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Using Stresses in Rock Engineering, Geology and Geophysics

Amadei

Stephansson

1997

Rock Stress and Its Measurement

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Critical pressure for gas storage in unlined rock caverns

Cited by 16 publications

References 3 publications

Creep, damage and failure around large rectangular-like caverns and galleries

Creep, damage and failure around large rectangular-like caverns and galleries

Numerical Simulations of Leakage from Underground LPG Storage Caverns

Using Stresses in Rock Engineering, Geology and Geophysics

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