Matrix temperature production logging tool

Abstract

A matrix production logging tool for measuring the temperature of produced fluids in a wellbore. Accurate production allocation to the pathways between the oil / gas well and the reservoir provides required data for the economic optimization of the techniques and procedures used to complete future wells. The low maintenance tool provides precise upstream, downstream and inflow temperature measurements of produced fluids within the wellbore.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a non-provisional application which claims benefit under 35 USC §119(e) to U.S. Provisional Application Ser. No. 62 / 021441 filed Jul. 7, 2014, entitled “MATRIX TEMPERATURE PRODUCTION LOGGING TOOL,” which is incorporated herein in its entirety.FIELD OF THE INVENTION[0002]This invention relates to a matrix production logging tool for measuring the temperature of produced fluids in a wellbore.BACKGROUND OF THE INVENTION[0003]Well logging surveys are often utilized in producing oil and gas wells in order to determine the fraction of oil, gas and unwanted water present in the production interval. This data along with measurements of the fluid flow velocity, cross-section of the well, pressure and temperature may be used to determine production rates and other information from each zone of interest in the well. Such data may be useful for optimizing the well's production, oil recovery, and water shut-off, in order to achieve...

AI Technical Summary

Benefits of technology

The patent describes a logging tool for use in a wellbore to measure the temperature of the fluid flow. The tool includes a core structure and two arms that are extendible from the core and pivot in one plane relative to it. The tool has a data transfer device connected to the core structure for collecting, processing, and storing data, as well as at least one temperature sensor attached to each arm. The sensor is located at the tip of the arm and, when the arm is extended away from the core, it is positioned near the inner surface of the wellbore. The invention allows for better temperature measurement in produced fluid flowing into or within a wellbore.

Problems solved by technology

As DTS spatially averages temperature over approximately 1 meter lengths it fails to provide precise measurements of the inflow temperature of produced fluids.

However, this type of logging tool has had issues with mechanical effectiveness.

Another disadvantage, which increases logging time on the well, is that calibration must be done downhole by making several extra logging runs at various logging speeds.

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