State of the art of advanced spectral noise and high-precision temperature logging technology utilization in Iraqi oil fields: an integration approach to diagnose wells performance complications

Mohammed Jawad Zeinalabideen,Andrey Savinkov,Mazin Mohlab Al-Hilali

doi:10.1007/s13202-021-01152-y

Mohammed Jawad Zeinalabideen, Andrey Savinkov + Show 1 more

Open Access

https://doi.org/10.1007/s13202-021-01152-y

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Abstract

In this study, an integrated approach of advanced spectral noise and high-precision temperature logging with production logging tool was used for the understanding of leak detection, fluid cross-flow, flow below spinner threshold, packer failure, fluid channeling in patchy and bad cement bond behind the casing, flow quantification in complex SSD completion, production detection and quantification in recirculation intervals in deviated wells. Various case studies from Southern and Northern Iraqi oil fields have been presented in this paper.

Highlights

Since 2003, the number of oil wells in Iraq has increased exponentially (Mills 2018) in order to achieve the local production plateau target for each Iraqi oil field
The perception of acquisition of the acoustic noise in oil wells dates to 1950s when Enright (1955) qualitatively defined a procedure of detecting tubing and casing leaks with an acoustic recorder sensing the highest noise levels at leaks
The reservoir noise spectrum depends only on reservoir structure while the volume of noise is a function of fluid type and pressure gradient

Summary

Introduction

Since 2003, the number of oil wells in Iraq has increased exponentially (Mills 2018) in order to achieve the local production plateau target for each Iraqi oil field. Due to longer response times, low-quality records may depend on the tool location inside the hole and cannot even be reproduced under identical temperature conditions SNL is a powerful technique for reservoir flow analysis due to its ability to locate active reservoir flow units It cannot reliably calibrate noise volume in terms of flow rates, noise is a complex function of several flow parameters, most of which, including differential pressure, fluid type and reservoir rock properties, are unknown. During shut-in condition: PLT data and analysis show minor wellbore cross-flow between the perforations (Fig. 4), while the SNL-HPT indicates clear temperature anomaly associated with acoustics noise, indicating active cross-flowing behind the casing (Fig. 6). SNL-HPT log was run in flowing and shut-in conditions in vertical well to make reservoir intake analysis (RIA), a PLT job done in flowing conditions only; the main goals were as follows: Fig. 5 IRAQ case study #1 PLT analysis results at flowing condition

Evaluate the injection profile across the perforated interval

Findings

Conclusions