... have been successfully established because, in sedimentary basins, strain is uniaxial and sedimentation drives loading and overpressure generation (Bowers, 1995; Osborne & Swarbrick, 1997). In the vertical effective stress (VES) workflow, the vertical effective stress across the volume of interest...

... ABSTRACT: Accurately predicting overpressure can effectively guide oil and gas exploration and development. However, the parameterization method is limited by the model form, and the accuracy is low. In this study, a new method to predict pore pressure using ensemble method was proposed...

... north america government injection sandia national laboratory stability equation enhanced recovery reservoir characterization seismicity permeability deformation diffusion operation saturation earthquake geological carbon dioxide storage overpressure mechanism accumulation ARMA 22...

... 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...

...-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...

... 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...

... 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...

... induce microseismic events, but without leading to CO 2 leakage. subsurface storage caprock flow in porous media strength Upstream Oil & Gas shale specimen overpressure Caprock Integrity stability aquifer remolded shale Makhnenko storage formation injection Reservoir...

... 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...

... injection well geothermal field injection thermal stress overpressure Geothermal System Reservoir Characterization geothermal reservoir stimulation fracture network situ stress coefficient stress field hydraulic fracture permeability rock matrix fracture gradient ARMA 17-474 Coupling...

... 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...

... 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...

... 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...

...). 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...

... 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...

... 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...

... overpressure ARMA 15-345 Effect of Rheology on Drilling Mud Loss in a Natural Fracture Sun, Yixuan and Huang, Haiying School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA Copyright 2015 ARMA, American Rock Mechanics Association This paper was prepared...

... 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...

... semi-analytical solution injection caprock storage region deflection aquifer equation subsurface storage approximation surface uplift injection well co 2 Hankel transform injection zone overpressure In Salah ARMA 13-184 Coupled semi-analytical solution for CO2 injection-induced...

... the Mad Dog field and illustrate that, contrary to traditional basin models, geomechanical analyses can explain horizontal stresses close to the overburden value. Reservoir Characterization geomechanical modeling Mad Dog field overpressure Upstream Oil & Gas minibasin wall rock Gulf...