For processes such as water injection in deep geothermal production, heat transfer and fluid flow are coupled affect one another, which leads to numerous challenges wellbore structure safety. Due complicated structures, consisting of casing, cement sheaths, formations under high temperature, pressure, situ stress, the effects thermo-hydro-mechanical (THM) coupling crucial for instability contro...

The measurement of wellbore annulus gas-liquid two-phase flow in CBM (coalbed methane) wells is of great significance for reasonably developing gas drainage and extraction processes, estimating CBM output, judging the operating conditions of CBM wells and analyzing stratum conditions. Hence, a specially designed sensor is urgently needed for real-time measurement of gas-liquid two-phase flow in...

Geoscientists from the Coso Operating Company, EGI-Utah, GeoMechanics International, and the U.S. Geological Survey are cooperating in a multi-year study to develop an Enhanced Geothermal System (EGS) in the Coso Geothermal Field. Key to the creation of an EGS is an understanding of the relationship among natural fracture distribution, fluid flow, and the ambient tectonic stresses that exist wi...

The buckling behavior of rod strings in wellbore is one of the key issues in petroleum engineering. The slender rod strings in vertical wellbore were selected as research objects. Based on the energy method, the critical load formulas of sinusoidal and helical buckling were derived for the string with the bottom of the wellbore pressure. According to the sinusoidal and helical buckling’s geomet...

BACKGROUND Reactive-transport simulation is a tool that is being used to estimate long-term trapping of CO2, and wellbore and cap rock integrity for geologic CO2 storage. We reacted end member components of a heterolithic sandstone and shale unit that forms the upper section of the In Salah Gas Project carbon storage reservoir in Krechba, Algeria with supercritical CO2, brine, and with/without ...

Abstract The challenges behind this research were encountered while drilling into the Ilam, Mauddud, Gurpi, and Mishrif Formations, where severe instability-related issues observed across weaker formations above reservoir intervals. In paper, geomechanical parameters carried out to determine optimum mud weight windows safe deviation trajectories using parameters. We propose a workflow equivalen...

Since hydraulic fractures exhibit a strong tendency to propagate in a plane normal to the least principal stress, the preferred plane of propagation under thrust stress regime (Sh > Sv) conditions is horizontal. This can lead to complications in applying the hydrofracture stress measurement technique as horizontal fractures do not directly sample the horizontal stress field. Recent experiences ...

Hydraulic fracturing with constant fluid injection r a t e was numer ica l ly model led for a p a i r of rectangular longitudinal fractures intersecting a wellbore i n a n i m p e r m e a b l e rock m a s s , a n d numerical calculations have been performed to investigate the relations among the form of pressuretime curves, fracture opening/propagation behavior a n d permeabi l i ty of t h e me...