Time-Resolved model for geothermal engineering in high porosity Slochteren sandstone

This work is an extension of the time-resolved poro-elasto-plastic MohrCoulomb model by Fokker et al to include a more realistic constitutive model. Experiments on Slochteren sandstone revealed that the inelastic deformation contributes significantly in compressive deformation almost in all stages of loading and instigated the development of a...

A semianalytic time-resolved poro-elasto-plastic model for wellbore stability and stimulation

Wellbore stability problems and stimulation operations call for models helping in understanding the subsurface behaviour and optimizing engineering performance. We present a fast, iteratively coupled model for the flow and mechanical behaviour that employs a time-sequential approach. Updates of pore pressure are calculated in a timestepping...

Sensitivity of chemical cement alteration: modeling the effect of parameter uncertainty and varying subsurface conditions

To ensure the safety of a CO 2 storage site and containment of CO 2 in the subsurface, the integrity of wellbore materials must be maintained. Field and laboratory studies have shown CO 2 -induced reactivity of wellbore cement, but these results have to be extrapolated to the extended time span of CO 2 storage. Geochemical modeling provides a...

Experimental investigation of terrain slugging: Formation mechanism and potential mitigation methods

An experimental study on terrain-induced slugging on shallow inclines (typically less than 3°) has been conducted, using three setups with a pipe diameter of around 1”, with incline lengths of 1 m, 3 m and 24 m. In addition to an extensive characterization of the formation and evolution of slugs as a function of flow conditions and inclination...

Simulating liquid loading in gas wells

This paper describes work performed by the authors over the last several years to better understand the factors affecting the onset of liquid loading. To further improve the prediction of onset of liquid loading, efforts were undertaken to better model the process. Dedicated codes as well as a commercial multiphase flow simulator were used to...

Feasibility of borehole radar measurements to monitor water/steam fronts in EOR applications

A technique capable of capturing the dynamic of the reservoir fluids in the proximity of production wells would provide enormous benefit to the reservoir management; in fact, monitoring can be used to develop a feedback loop between measurements and control technologies to optimize the production. This paper examines the feasibility of a...

Assessing CO2 interaction with cement and steel over a two-year injection period: Current state and future risks for the MovECBM project in Poland

On the site of Kaniow (Poland) a new well was used to inject supercritical CO2 into coal seams over a two year period. The injection was part of an experiment on Enhanced Coal-Bed Methane recovery sponsored by the RECOPOL and MovECBM European project. Part of the interest in ECBM is the possibility to store CO2 in unmineable coal seams for...