Digital oilfield

Distributed Acoustic Sensing for Downhole Production and Injection Profiling

In the past decade, fiber-optic -based sensing has opened up opportunities for in-well reservoir surveillance in the oil and gas industry. In this paper, the authors present a recent example of single-phase-flow profiling with distributed acoustic sensing.

Generated image of numbers across a grid and acoustic waves
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In the past decade, fiber-optic (FO) -based sensing has opened up opportunities for in-well reservoir surveillance in the oil and gas industry. Distributed-temperature sensing (DTS) has been used in applications such as steam-front monitoring in thermal enhanced oil recovery and injection-conformance monitoring in waterflood projects. FO-based pressure gauges are deployed commonly. Significant progress also has been made in maturing other new FO-based surveillance methods such as distributed acoustic sensing (DAS). In this paper, the authors present a recent example of single-phase-flow profiling with DAS.

Introduction

FO-based surveillance allows for a complete, instantaneous data set from the top to the bottom of the well vs.

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