Method for interpretation of distributed temperature sensors during wellbore treatment

摘要

A method for determining flow distribution in a formation having a wellbore formed therein includes the steps of positioning a sensor within the wellbore, wherein the sensor generates a feedback signal representing at least one of a temperature and a pressure measured by the sensor, injecting a fluid into the wellbore and into at least a portion of the formation adjacent the sensor, shutting-in the wellbore for a pre-determined shut-in period, generating a simulated model representing at least one of simulated temperature characteristics and simulated pressure characteristics of the formation during the shut-in period, generating a data model representing at least one of actual temperature characteristics and actual pressure characteristics of the formation during the shut-in period, wherein the data model is derived from the feedback signal, comparing the data model to the simulated model, and adjusting parameters of the simulated model to substantially match the data model.

主权项

1. A method for determining a flow profile in a formation having a wellbore formed therein, comprising:
positioning a sensor within the wellbore; generating a feedback signal with the sensor, the feedback signal representing at least one measurement by the sensor; injecting a fluid into the wellbore and into at least a portion of the formation adjacent the sensor; shutting-in the wellbore for a pre-determined shut-in period; determining an interval of interest within the wellbore; measuring characteristics of the interval of interest with the sensor at discrete time periods; plotting the measurements of the interval of interest against time; comparing the measurements of the interval with a theoretical measurement curve; fitting the theoretical curve to the measurements; and determining a volume flow profile for the interval of interest by dividing the wellbore interval of interest into a plurality of sub sections; repeating measuring, plotting, comparing, and fitting for each of the plurality of sub sections; and determining for each of the sub sections a volume flow profile for the entire wellbore interval of interest.