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Keywords: subsidence
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Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47218-MS
... disposal alternatives; a complete review of the geologic structure of the overburden for determining the optimal location of reinjection; numerical simulations of fracture behavior and performance; well design considerations; final selection of the well location; contingency planning; and a subsidence risk...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47345-MS
... Abstract In weak formations, significant pressure depletion may lead to compaction. Transmission of compaction through the rock layers overlying the depleted formation may, in turn, cause subsidence. At the Ekofisk field, a large producing oil and gas reservoir located in the Norwegian sector...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47280-MS
... Abstract In order to get a realistic prediction of the in situ stress evolution, compaction and subsidence of the HP/MT Shearwater field, full 3-D finite element calculations were made with the program DIANA. An interface was made to generate 3-D meshes directly from seismic files, which led...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47348-MS
... Abstract A study was initiated to improve the geomechanical input to the full field compaction/subsidence prediction model for Valhall and wellbore stability analysis models used to plan long extended reach wells in the Valhall field. The results are also applicable for other geomechanical...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47284-MS
... predicted surface subsidence with field measurements, and by comparison of predicted deformation with observed casing damage. Further, simulations performed for two independently developed areas at South Belridge, Sections 33 and 29, corroborate their different well failure histories. The simulations...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47350-MS
... as the behaviour of surface subsidence during aquifer depletion and repressurisation. P. 203 central part rock mechanics depletion compaction irreversibility reservoir geomechanics fracturation pressure subsidence scale effect reservoir stress path situ stress consequence pressure...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47274-MS
... Abstract The combination of in situ effective stress and reservoir chalk mechanical weakness in the Valhall field has resulted in compaction and associated subsidence at the mudline. This paper summarizes recent finite element modeling of this phenomenon, emphasizing items of concern in a...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47587-MS
... Abstract Ekofisk, Valhall and other North Sea reservoirs are made of water sensitive rocks such as pure high porosity chalk. Production of these fields implying water-flooding leads in several cases to compaction and subsidence. In order to perform reliable predictions of compaction and...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47391-MS
... deformations result in casing damage or failure. Two-dimensional, field- scale finite element models were used to develop relationships between field operations, surface subsidence, and shear- induced casing damage. Pore pressures were computed for eighteen years of simulated production and water injection...
Proceedings Papers

Paper presented at the Rock Mechanics in Petroleum Engineering, August 29–31, 1994
Paper Number: SPE-28021-MS
... exploration issues, etc; ii. on the other end develop economically the more mature topics such as well bore stability, sand production prediction, hydrofracturing, subsidence, etc. Whilst the former aspect can be treated from an essentially research based stand point, the latter needs to be addressed from an...
Proceedings Papers

Paper presented at the Rock Mechanics in Petroleum Engineering, August 29–31, 1994
Paper Number: SPE-28091-MS
... Abstract Casing deformation as a consequence of reservoir compaction and surface subsidence has occurred in the Ekofisk Field. Casing deformation database results show that reservoir deformations occur throughout the field, while overburden deformations occur primarily on the field flanks...
Proceedings Papers

Paper presented at the Rock Mechanics in Petroleum Engineering, August 29–31, 1994
Paper Number: SPE-28105-MS
... Abstract This paper presents the development of the theory and of a computer program to predict subsidence and horizontal displacement due to oil and gas withdrawal. Geertsma's nucleus of strain model has been modified and combined with an influence function program, developed for the...
Proceedings Papers

Paper presented at the Rock Mechanics in Petroleum Engineering, August 29–31, 1994
Paper Number: SPE-28099-MS
... characterization selection criteria particle motion axis reservoir rock frequency reservoir microearthquake geophone subsidence wellhead pressure compaction orientation upstream oil & gas borehole geophone package magnitude reservoir compaction monitor well trajectory deformation SPE...
Proceedings Papers

Paper presented at the Rock Mechanics in Petroleum Engineering, August 29–31, 1994
Paper Number: SPE-28133-MS
... contributes to mitigate compaction and subsidence of highly compactable reservoirs. This last function is however severely put in question by the mechanical behaviour of North Sea chalk fields submitted to massive water-injection. From experimental results common to most labs we develop several models...
Proceedings Papers

Paper presented at the Rock Mechanics in Petroleum Engineering, August 29–31, 1994
Paper Number: SPE-28094-MS
... all but one well could the vertical compressibility be obtained. The in-situ measured compressibilities match with the compressibility as inferred from the surface subsidence over the field. Introduction The Groningen gas field situated in the north- eastern part of the Netherlands (fig. 1) was...
Proceedings Papers

Paper presented at the Rock Mechanics in Petroleum Engineering, August 29–31, 1994
Paper Number: SPE-28128-MS
... Abstract Three aspects of reservoir compaction/subsidence simulation for Ekofisk are addressed: stress paths in the reservoir during depletion, impact of porosity heterogeneities in reservoir chalk on scaling laboratory compaction data to field behavior, and methods for treating the...
Proceedings Papers

Paper presented at the Rock Mechanics in Petroleum Engineering, August 29–31, 1994
Paper Number: SPE-28095-MS
... differential global positioning system upstream oil & gas subsidence proc depletion application base line thickness gp station antenna accuracy satellite displacement us government reservoir characterization software computer simulation laser platform receiver fluid...
Proceedings Papers

Paper presented at the Rock Mechanics in Petroleum Engineering, August 29–31, 1994
Paper Number: SPE-28129-MS
...SPE 28129 Finite element analysis of compaction and subsidence - Experience gained from several chalk fields Bertold Plischke, ISAMGEO-Engineering GmbH, Wiesbaden, Germany Copyright 1994. Society of Petroleum Engineers This paper was prepared for presentation at the 1994 Eurock SPE/ISRM Rock...
Proceedings Papers

Paper presented at the Rock Mechanics in Petroleum Engineering, August 29–31, 1994
Paper Number: SPE-28125-MS
... wastes against the biosphere necessitates safety assessment with respect to long-term integrity of the host rock. P. 761 geomechanical data upstream oil & gas artificial intelligence cavity field reservoir characterization surface subsidence rock salt assessment waste management...

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