Old CaTS Technology Learns a New Trick

A subsea transceiver mounted to a casing debris-cap is one of the elements required to get valuable reservoir data from an abandoned well back to engineers. Source: Expro

Somewhere offshore Norway there is an abandoned appraisal well that is unlike any other. Despite being a non-producer, inside it are pressure gauges meant to reveal clues on how the reservoir will ultimately give up its resources.

Developed by service firm Expro, the technology being discussed here is the cableless telemetry system (CaTS). Instead of running the requisite productivity test and then leaving an appraisal well behind for months or years until a field is ready for development, operators use the CaTS for the long-term collection of transient pressure data that will help them narrow the uncertainties of where to drill next.

It works by sending data from battery-powered pressure and temperature gauges though a well’s metal casing via an electro-magnetic (EM) transmitter, a critical ingredient to Expro’s approach.

“There are many different telemetry systems and technologies, [e.g.] acoustic, mud pulse,” explained Stephen Kelly, a product line manager for Expro’s wireless well solutions group. “But the thing about the EM system is that the signal is unaffected by any barriers in its path. So bridge plugs have no impact, and cement plugs, zero impact.”

Open Hole Hop

As is the norm for an appraisal well, this one was used to run tests that help determine key things such as permeability before being plugged up.

But less normal is the fact that the operation involved installing a sensor within the pilot-hole section of the well before cutting its casing and installing a rock-to-rock cement plug. The upper casing was then also cut some 15 feet below the mudline, per Norwegian regulations that aim to eliminate the risk of a fishing vessel’s trawling net getting snagged onto the wellhead.

 

The CaTS transceiver installed at the seabed. Source: Expro

Model Capabilities

What kept the engineers unsure of their technology’s capabilities was the model that Kelly described as the “brains of the operation” which is used to predict how the CaTS and all its bespoke components may work in each well scenario.

This model balances out three defining parameters for each job: rate, range, and duration. In other words, the CaTS engineers need to know how many data points does the operator need over a given period, how far can that data be transmitted, and how long does the monitoring system need to stay powered up. Depending on the answer to these questions, a CaTS can be designed to last for 3-7 years before its batteries die, at which point the units can be left in place or retrieved for a battery swap.

But to understand the uncased scenario, the team turned to a different 3D model which suggested that data could be transmitted this way if repeater units were placed close to where the casing was cut.

When the rig pulled off location, success was confirmed when a support vessel was still receiving pressure data from the CaTS. This seemingly small development for a well-proven technology confirmed that the CaTS can work in a wider envelope of abandoned or suspended well designs than was once believed.

Expro is anticipating that this latest example of its telemetry skills will lead to more instrumentation work in wells with casing breaks or longer open-hole sections. The company also has plans to create a new generation of the CaTS, a project that will consider whether to upgrade its pressure rating from 15,000 PSI to 20,000 PSI in order to add to its potential application ultra-high-pressure basins such as the Gulf of Mexico.

This diagram shows how Expro’s telemetry system was used to transmit data without the usual requirement of continuous casing. Source: Expro

Old CaTS Technology Learns a New Trick

Trent Jacobs, JPT Digital Editor

12 June 2018

https://www.spe.org

https://www.ogdaily.com/

News Categories

Latest E&P Jobs

Req ID: R0378 Markit Counterparty Manager (MCPM) is an online platform for institutional investors and other financial institutions to exchange documentation and regulatory data efficiently in a secure environment. Through this platform the users are able to: Electronically manage trading accounts on ISDA, FX and MSFTA master agreements Classify trading entities to amend and share ISDA master agreements Simplify FATCA
Req ID: R1386 Department overview Portfolio Valuations is a multi-contributor validated, fully hosted service that provides independent post-trade OTC derivative valuations to buy-side firms.  The service differentiates itself through its extensive cross-asset dataset encompassing vanilla and exotic derivatives that is used to calibrate and validate its pricing models.  IHS Markit employs established valuation methodologies and quantitative techniques with industry standard
R&D Ballistics Engineer (m/f) DynaEnergetics, Troisdorf, Germany Your Challenge you will be directly involved in R&D and oilfield product development projects from the project conception right up to the commercial launch you will create technical drawings, independently plan and carry out ballistic test programs and also analyze and document the results after completion of the product development you will oversee
Req ID: 89929 Date Posted: 02/06/2018 Singapore – Singapore Summary: IHS Markit is seeking to appoint a high-caliber Director of Consulting to join company’s fast-growing Asia Pacific Power, Gas, Renewables and Coal (APAC PGCR) group to lead its consulting practice. This position offers a significant opportunity to the successful candidate in a highly respected company that is looking for a leader
Date: Feb 4, 2018 Location: Shanghai, 31, CN, 200120 1.On- site Audit  (QMS for new supplier, special process audit, HSE ETC) and Follow-up to close the finding during the first audit 2.Technical Review  for new project: Spec and test method 3.Provide  training of Halliburton Global procedures and processes to new vendor 4.On-site audit according to Global Packing Requirement 5.Resolve Quality
Req ID 86277BR Job category Engineering Countries (State/Region) Western Australia Location Australia – Western Australia – Kwinana Role synopsis BP’s Kwinana Refinery is one of the most modern in the southern hemisphere. It is Western Australia’s only refinery and with a capacity of 146,000 barrels of crude oil per day, it is Australia’s largest. On-going investment in refining technology has
Req ID 87397BR Job category Finance Countries (State/Region) Central Location Malaysia – Central – Kuala Lumpur Role synopsis The Product Executive is accountable to facilitate product line changes implementation, track product network changes and activities related to Streamline processes and managing responsibility of Streamline process effectively & efficiently in the A&P region. The role will provide operational support to deliver
Req ID 87372BR Job category Human Resources Countries (State/Region) South East Location United Kingdom – South East – Sunbury Role synopsis The Resourcing Specialist has primary accountability for partnering with HR Business Partners (‘HRBPs’) and Line Managers to achieve agreed HR People Plan objectives, both personally and through management of the resourcing function in region. This specialist role acts as
JOB ID: 10008 COUNTRY: Norway, Norway, Norway LOCATION: Stavanger, Bergen, Trondheim COMPANY: Statoil ASA CONTACT NAME: Statoil Recruitment – Digirecr@statoil.com WORKPLACE: Onshore DISCIPLINE: Information Technology EDUCATION PREFERRED: Master’s Degree EXPERIENCE PREFERRED: 3 – 5 Years CLOSING DATE: Jun 30 2018 Statoil is an international energy company with operations in more than 30 countries. Building on 40 years of experience from
Date: Jan 17, 2018 Location: Duncan, OK, US, 73533 We are looking for the right people — people who want to innovate, achieve, grow and lead. We attract and retain the best talent by investing in our employees and empowering them to develop themselves and their careers. Experience the challenges, rewards and opportunity of working for one of the world’s
Date: Jan 4, 2018 Location: Kuyumba, KYA, RU, 629300 We are looking for the right people — people who want to innovate, achieve, grow and lead. We attract and retain the best talent by investing in our employees and empowering them to develop themselves and their careers. Experience the challenges, rewards and opportunity of working for one of the world’s
Date: Dec 21, 2017 Location: Red Deer, AB, CA, T4P 3R4 We are looking for the right people — people who want to innovate, achieve, grow and lead. We attract and retain the best talent by investing in our employees and empowering them to develop themselves and their careers. Experience the challenges, rewards and opportunity of working for one of
Date: Dec 22, 2017 Location: New Plymouth, N, NZ We are looking for the right people — people who want to innovate, achieve, grow and lead. We attract and retain the best talent by investing in our employees and empowering them to develop themselves and their careers. Experience the challenges, rewards and opportunity of working for one of the world’s
Date: Dec 21, 2017 Location: Baku, BA, AZ, AZ1065 We are looking for the right people — people who want to innovate, achieve, grow and lead. We attract and retain the best talent by investing in our employees and empowering them to develop themselves and their careers. Experience the challenges, rewards and opportunity of working for one of the world’s
Date: Dec 20, 2017 Location: Baku, BA, AZ, AZ1065 We are looking for the right people — people who want to innovate, achieve, grow and lead. We attract and retain the best talent by investing in our employees and empowering them to develop themselves and their careers. Experience the challenges, rewards and opportunity of working for one of the world’s
Date: Dec 17, 2017 Location: Mumbai, KA, IN, 400093 We are looking for the right people — people who want to innovate, achieve, grow and lead. We attract and retain the best talent by investing in our employees and empowering them to develop themselves and their careers. Experience the challenges, rewards and opportunity of working for one of the world’s
June 2018
M T W T F S S
« May    
 123
45678910
11121314151617
18192021222324
252627282930