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Keywords: overpressure
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Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1063
... to establish the root cause of pressure ramp and implement preventive measures. It includes characterization of overpressure mechanism and steps for predictive modelling for planned locations. The first step involves the collection of information related to drilling complications, drilling parameters...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-2166
...-level-dependent behaviors on pore pressure and structural style of critical tapers. We demonstrate that the stress-level decrease of the friction angle causes a concave-upward topography, a concave-downward profile for thrust faults, and lower overpressure in critical tapers. In contrast, the stress...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-856
... mechanical earth models, showing the approaches used for estimating overpressure and its causes, for assessing material anisotropy, and for deriving the poroelastic parameters needed for stress estimation. Results of the 1D models are compared with results from a 3D finite element model that was built using...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0474
... reservoir climate change Upstream Oil & Gas thermal stress overpressure Geothermal System gradient stimulation coefficient hydraulic fracture fracture injection well geothermal field injection permeability fracture network situ stress stress field rock matrix 1. INTRODUCTION...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0542
... by significant sedimentation rate is studied using both analytical and numerical methods. The focus is put on a synthetic geological structure containing a caprock and a reservoir that are overpressured by a vertical mechanical load. For the numerical simulations, finite element modeling and cohesive model...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0194
... were found to contain significant overpressure at onset depths ranging from 1098 to 2317 meters subsea. The overpressure is mainly associated with organic-carbon-rich source rocks that have experienced thermal exposures sufficient for hydrocarbon generation. The driving mechanism for the origin...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0199
... induce microseismic events, but without leading to CO 2 leakage. subsurface storage Upstream Oil & Gas flow in porous media strength Reservoir Characterization remolded shale Makhnenko storage formation injection permeability shale specimen overpressure Rutqvist Fluid Dynamics...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0345
... ABSTRACT: We use a transient, large-strain, forward geomechanical model to predict pore pressure evolution below an advancing salt sheet. We find that salt-sheet emplacement results in significant overpressures subsalt and a narrow drilling window. We show that these overpressures cause...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0881
... bottom. We show that the sand layer causes a significant increase in pore pressure near the diapir by transmitting overpressure from deep sediments far from the diapir. This pressure increase makes it difficult to safely drill wellbores near the diapir. We examine the stress history of mudrocks...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-275
... a significant overpressure. Thus, a competition is initiated between dissipation of fluid overpressure and sedimentation rate. The overpressure decreases in horizontal effective stress and may result in fracture initiation. The present study deals with the propagation of natural fractures in seal formations...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-517
...). In addition to undercompaction and other overpressure generation mechanisms, chemical compaction effects can produce overpressure in lithologies subject to high temperature conditions. This work presents a pore pressure model for an exploratory well that reproduces the depositional history of the well...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-043
... changes as a function of the vertical, thus the vertical effective stress is a good representation of the overall stress state. As a result, vertical-effective-stress methods have been established to calculate overpressure (Zhang, 2013). In these methods, overpressure is calculated as the difference...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-345
... overpressure 1. INTRODUCTION Severe lost circulation is a common contributor to the nonproductive time in drilling, in particular in naturally fractured reservoirs. Lost circulation may also cause significant issues in subsequent well completion and reservoir production. Quantitative prediction...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-351
... Abstract Standard methods to predict pore pressure rely on the assumption that under-compaction is the only mechanism for overpressure generation. For conventional plays, this assumption may be held since the weight of the overlying sediments is supported partly by the rock matrix and partly...
Proceedings Papers

Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-184
... Hankel transform caprock storage region deflection aquifer caprock layer co 2 injection zone overpressure Upstream Oil & Gas displacement pressurization semi-analytical solution equation In Salah injection 1. INTRODUCTION Many human activities such as transportation and power...
Proceedings Papers

Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-234
... modeling Mad Dog field mechanism overpressure sediment horizontal stress Mexico loading stress change effective-stress ratio salt body Symposium overburden value stress perturbation 1. INTRODUCTION Salt is a significant geologic feature in the Gulf of Mexico. North of the Sigsbee Escarpment...
Proceedings Papers

Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-278
... microseismic event overpressure Fault Zone hydraulic stimulation Magnitude fault network permeability deep geothermal well ARMA 13-278 Role of the 3D network of faults on the response to hydraulic stimulation of deep geothermal wells Gentier, S., Rachez, X., Blaisonneau, A. and Guillon, T. BRGM...
Proceedings Papers

Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-729
... of, or absence, of overpressures can be extracted. Case studies are presented relating to forward modeling the evolution of the ACG anticline using the Finite/Discrete Element software package ELFEN. 2D sections are modeled with the software under a variety of conditions. Modeled pore pressure distribution...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-226
... different potential gas sources in the disposal gallery. An important part of these gases is induced by the corrosion of steel canister. Furthermore, induced gas overpressure could have a negative impact on the engineered barrier and the host rock. Consequently, it is very important to study the gas...
Proceedings Papers

Paper presented at the 44th U.S. Rock Mechanics Symposium and 5th U.S.-Canada Rock Mechanics Symposium, June 27–30, 2010
Paper Number: ARMA-10-375
... natural evolution an underlying decollement and fault structures. Modeling is capable of representing the form of fault structures that may develop within a basin as a result of shortening. Thrust faulting develops as overpressures evolve to trigger failure. A decollement forms within the system...

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