Intergenerational Earnings Mobility and Preferences for Redistribution This paper analyzes the extent to which intergenerational upward and downward mobility in earnings are related to individuals’ preferences for redistribution. A novel survey question from the German Socio-Economic Panel Study – whether the taxes paid by unskilled workers are too high, adequate or too low – are used to elicit...

Determination of the borehole and fracture initiation positions is the main aim of a borehole stability analysis. A wellbore trajectory optimization with the help of the mud pressure may be unreasonable since the mud pressure can only reflect the degree of difficulty for the initial damage to occur at the wellbore rather than the extent of the wellbore damage. In this work, we investigate...

In the flowing fluid electric conductivity (FEC) logging method, wellbore fluid is replaced with de-ionized water, following which FEC profiles in the wellbore are measured at a series of times while the well is pumped at a constant rate. Locations were fluid enters the wellbore show peaks in the FEC logs, which may be analyzed to infer inflow strengths and salinities of permeable features inte...

This paper presents a wellbore-stability study of the San Andreas Fault Observatory at Depth (SAFOD) research borehole located near Parkfield, California, USA. In the summer of 2005, the SAFOD borehole was drilled successfully through the active trace of the San Andreas Fault (SAF) in an area characterized by fault creep and frequent microearthquakes. In this study, we report how the analysis o...

Some fundamental mechanisms associated with cooling/heating of the rock in the context of drilling and reservoir stimulation in enhanced geothermal systems are described. The role of temperature and pore pressure in wellbore failure and fracture width is considered using analytical and boundary element models. Results indicate that cooling induces a pore pressure drop inside the formation that ...

A new correlation to estimate the solubility of carbon dioxide in water for the temperature interval of geothermal interest (from 25°C to 350°C) is proposed. This equation was derived from a comprehensive statistical analysis applied to an updated thermodynamical database containing experimental solubility data reported in the literature. In addition, it is also presented a useful equation to q...

Because of the existence cuttings in flow, pressure loss wellbore can increase significantly. Minimization flow greatly benefits drilling process. This work investigates most important factors to during hole cleaning It is found that, for solid–liquid, two-phase fluid rate not always proportional annular as single-phase flow. The mechanisms behind this effect are studied, and a mechanistic mode...

Drilling a hole into rock results in stress concentration and redistribution close to the hole. When induced stresses exceed strength, wellbore breakouts will happen. Research on breakout is fundamental of stability. A sequence concentrations, falling, redistributions, which involve initiation, propagation, stabilization sequences. Therefore, simulating process very challenging. Thermoporoelast...

Within the TINA research Project (Transient Integrated Network Analysis) and in partnership with Total, IFP is developing a new generation of simulation tool for flow assurance studies. This integrated simulation software will be able to perform multiphase simulations from the wellbore to the surface facilities. The purpose of this paper is to define, in a CAPE-OPEN compliant environment, a str...