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C-series for Gas Lift

The level of gas lift injection required for enhanced oil production from a gas lift well varies based on well conditions. Over- or under-estimation of the amount of gas required results in less than maximum production at surface.

Zenith C-Series monitoring systems, with fit-for-purpose design for non-ESP environments, give detailed and accurate information about the operation of the well, reservoir and artificial lift system, providing the knowledge to enable improved production and reservoir performance — well and pressure data from the C-Series gas lift well monitoring system can lead to increased production and a decreased requirement for injected gas, improving overall efficiency.

Pressure data is of primary importance in understanding well, pumping system and reservoir performance. Typically a pressure data survey can cost $20,000 - $30,000 in pulling hoist costs, slickline and memory gauge rental, and well downtime over and above what is necessary to obtain useful data. The C-Series artificial lift monitoring system completely replaces the need to pull rods, run memory gauges and the associated risks involved with the slickline operation. The gauges remove the predicament of losing unnecessary production through operating blind whilst build-up data is gathered. The gauges also allow draw-down transients to be gathered, an operation not possible with memory gauges without multiple rod pulls.

Overview
Features & Specs
FAQs
Case studies
Resources

Overview

Available in multiple specifications to suit your lift systems

The Zenith C-Series sensor is installed on a carrier sub in the tubing string above or below the pump. The sensor uses an electric instrument line to communicate signals to surface. The C-Series sensor is available in multiple specifications to suit the application and economic impact of deploying monitoring on your lift systems. The choice of parameters can be customised at point of order allowing you to select a level of monitoring to suit your operational and economic requirements.

Maximise runlife while reducing costs

Automatic alarm and trip feature safeguards your lift system and well preventing unnecessary workovers and minimising expenditure, protecting against:

Pump off
Pump overheating
Excessive well draw-down
High or low flow rates
Dead heading or shut in
Resonant vibration frequencies

Optimise production

Dual pressure option enables full validation and analysis of well and pump operating conditions
Feedback intake pressure level to your VSD frequency setting to provide automated control of draw-down
Fast sampling and accurate sensors enable analysis of draw-down and build-up pressure transients

Independent source of data for analysis

Identification of pump wear issues
Validation of inflow/outflow data

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Features and specifications

C-Series system features

High quality, modular construction—13 chrome metalwork as standard
Long service life allowing repeated deployment
Field-serviceable system with easily replaceable sub-assemblies, and a surface system which can be upgraded in the field
Downhole data collection
- SD card — simple data transfer to removable memory card
- Data display with live on-screen data charting, drive mounted or enclosure
- Data trending software
- Dedicated engineers’ port to laptop or Zenith hand-held PC
- Connectivity to remote data collection or SCADA systems
Communications and power via a dedicated instrument line
Calibrated by Zenith during manufacture — calibration stored in the downhole tool
One-second update of all parameters
Allows cable megger test

C-Series system options

Zenith C-Series sensors can be configured to monitor:

Annulus pressure
Tubing pressure
Annulus temperature
Tubing temperature
Vibration (X & Y axes)
Current leakage

C-Series system specifications

C-Series sensors are available in two temperature specifications:

Standard Temperature: 150°C
High Temperature: 175°C

C-Series sensors are available in two pressure specifications:

Standard Accuracy: 0.2% of full-scale, 1 psi resolution
High Accuracy: 0.1% of full-scale, 0.1 psi resolution

In order to assist you in finding the solution to best fit your requirements, please see the following links to related product and service information throughout our website. For documentation and downloads, please visit the Resources tab.

C-Series Well Monitoring for PCP

C-Series Well Monitoring for Beam Pump

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