THE FLOW PROFILE MEASUREMENT IN WELLS WITH ARRAY PRODUCTION LOGGING

Interpretation of production logging in multi-phase flow wells is challenging, especially for highly deviated wells or horizontal wells. Flow regime-dependent flow conditions strongly affect the measurements of production logging tools. Segregation and possible back flow of denser phases result in misinterpretation of the inflow distribution. The newest generation of production logging tools designed to overcome the flow regime related issues and assess the downhole flow conditions more accurately consist of multiple sensors in multiple location around the wellbore that incorporate 12 resistivity and capacitance probes and six spinners. These tools providing a distributed measurement array that helps to relate the measurements to flow regime and translate the measurement to inflow distribution in all types of wells, including highly deviated and horizontal wellbore that is not available with the traditional center sample tools because of the wellbore conditions, especially with fluid segregation. Production array logging , what you will read is a brief review of how it works, then, description of the method that is presented by L. Liao to achieve flow profile including its newest method to use log array data[1]. The capacitance array tool (CAT) determines the water, oil and gas holdup in the well. The resistivity array tool (RAT) determines the holdup of hydrocarbons and water. The spinner array tool (SAT) enable the measurement of the velocity profile. The method of L. Liao allows interpretation of phase volumetric flow rates in sub-divided cross-sectional areas based on sensor locations. The sub-divided area method divides the wellbore cross-sectional area into several layers depending on the number and arrangement of the sensors with each layer containing at least one sensor. The method developed was used to interpret the flow profile of an Eagle Ford well producing gas and water at downhole condition.

کلیدواژه ها:

Flow regime ، Multi-phase flow ، Production logging tools (PLT) ، Resistivity array tool (RAT) ، Oil and gas wells