Temperature-Prediction Model for a Horizontal Well With Multiple Fractures in a Shale Reservoir

Abstract

Fracture diagnostics is a key technology for well performance prediction of a horizontal well in a shale reservoir. The combination of multiple fracture diagnostic techniques gives reliable results, and temperature data has potential to provide more reliability on the results. In this work, we show an application of a temperature prediction model for a horizontal well with multiple hydraulic fractures in order to investigate the possibility of evaluating reservoir and hydraulic fracture parameters using temperature data. The model consists of wellbore model and reservoir model. Sensitivity studies were performed on temperature distribution to identify influential parameters out of the reservoir and hydraulic fracture parameters including reservoir porosity, reservoir permeability, fracture half-length, fracture height, fracture permeability, fracture porosity, fracture network parameters, and fracture interference between multiple clusters. In this work, in order to find contributions by a target fracture, temperature change sensitivity is evaluated. Single fracture case reveals that fracture permeability, network fracture parameters and fracture geometries are primary influential parameters on temperature change at the fracture location. And also, multiple fractures case shows that temperature change is augmented with the increase of fracture geometry and is decreased with the increase of fracture permeability. These results show the possibility of using temperature to determine these sensitive parameters, and also the

Flow Rate Profile Interpretation for a Two-Phase Flow in Multistage Fractured Horizontal Wells by Inversion of DTS Data

“…In recent years, besides conventional horizontal wells, more temperature prediction models were proposed for MFHWs. Yoshida et al 28 derived a new transient temperature prediction model from Yoshioka's model 29 to simulate the temperature distribution for an MFHW in a shale gas reservoir. They also performed the sensitivity evaluation of the wellbore temperature profile for different factors.…”

A Novel Temperature Prediction Model Considering Stress Sensitivity for the Multiphase Fractured Horizontal Well in Tight Reservoirs

“…For unconventional reservoirs, Cui [16] established a single-phase flow artificial fracture temperature distribution calculation model based on the assumption of threelinear flow, proposing that fracture diagnosis could be performed based on dynamic monitoring of the horizontal well temperature. Yoshida [17,18] extended the single-phase temperature model to multiphase and constructed a multiphase fractured horizontal well temperature model to calculate the wellbore temperature profile during the horizontal well production. Sui [19] developed a semi-analytical reservoir-wellbore coupled thermal model for open hole packer completion in the tight gas reservoir.…”