Slickline Measurements: The Future is NOW!

21 Oct 2020

Our industry tends to think of slickline as a low tier option to make largely mechanical changes to the well later in its life. With the development and continuous improvement of memory tools there has been an ever-increasing role of slickline to deploy memory tools and later retrieve the information for analysis and interpretation.

We believe we are on the verge of a significant change in the way slickline is used and perceived. The evolution of slickline started with the first fiber optic slickline (~2010) when a Distributed Temperature survey (DTS) was deployed from a slickline drum into wells to measure flow profiles and do gas lift optimization. That huge step turned the entire line into an instrument which measured temperature along the full wellbore in real time. We saw that the performance of the reservoir was not static and gas lift valves chattered, opened and closed and rarely functioned exactly as designed.

Fast forward to today where Distributed Temperature Surveys (DTS), Distributed Acoustic Surveys (DAS) and an electrical signal can all be built into a single 4.8 mm (0.189 inch) or smaller line.

The possibilities are endless:

— Depth correlation via traditional gamma ray collar locator tools

— Flow profiles using DTS and DAS to give quantitative flow from perfs in non-horizontal wells

— Injection profiles from warm back data

— Leak detection using DAS and DTS

— Gas lift monitoring of the entire system at the same time – no station stops at a moment in time

— DAS to monitor for microseismic events from a nearby frac well to get frac height

— DAS to monitor strain and microseismic from an offset well for frac growth and prorogation

This new slickline technology combined with easy-to-use software and acquisition units will change the slickline industry to one where complex well analysis can be done in real time from the wellsite. Gas lift wells are run at the optimum production rate, frac analysis and modeling can be verified and improved for the local geological impacts.

Contact us for details on how this technology can improve your production and how we can implement it in your location in a cost-effective way to get answers quick.

Characterization of Cable Response on Acoustic Excitation Using Phase-Sensitive DAS

11 Aug 2020

A comparative test has been performed to check the acoustic sensitivity of different types of Wires&Bytes cables for vibroacoustic influences at our test center. The cables, including UniTEF, OPGW, metallic and non-metallic MultiSense designs were tested at different acoustic frequencies and their responses were recorded and observed using Distributed Acoustic System. Results obtained in the test show differences in acoustic performance of the cables when tested under the same conditions.

Introduction

The objective of this study was to qualitatively test and determine acoustic performance of several cable designs, that are different in configuration and material used. The aim was to give users a better understanding of the acoustic performance of different designs, both standard and special, help them in selection of cables for different applications as well as set new goals for the development of new cable designs. For example, for a pipeline leak detection, where high frequency response is required for the deployed cables, positioned at some distance from the pipe, the right cable selection will ensure optimum monitoring. Another example would be selection of fully dielectric cables deployed along electrically powered railways, where the use of metallic designs raises significant safety issues limiting deployment in many countries around the world.

Test set-up

The test procedure involved building a specific cable-acoustics test bench (Fig. 1) and acquisition of different acoustical equipment including phase-sensitive DAS equipment.

Fig. 1: Acoustic Test Set Up for FO Cables

The cable sample is sandwiched between two soft material panels, acoustically excited from the top (Fig. 2) and interrogated with commercial DAS equipment. Laser pulse repetition rate used (LPRR) was 10 kHz with gauge length set to 16m.

Fig. 2: Cable Sample Test Bench for Acoustic Response Evaluation; (a) completed bench with loaded sample, (b) sample laying inside the bench, (c) mounting of excitation head

DPS-P-32f
DPT-P-08f
OPGW-C-24f
TsOS-P-48f
TOS-P-16f
Metallic MultiSense
Non-metallic MultiSense

Fig. 3 Cables Samples tested

Only sinusoidal signals from both loudspeaker and subwoofer were used in the test. Acoustic signal frequencies recorded on each cable were: 40, 80, 160, 320, 640, 1280, 2560Hz – all multiples of 40 Hz to avoid possible interference with 50 Hz from the power supply network. Cables with the range dimensions, masses, configuration, and chemical compositions were sampled and used in the test.

Results

It is evident that cable characteristics such as mass, design, and fiber configuration and integration play an important role in acoustic response. Low frequency perturbation tends to have stronger impact than the higher frequencies.

To process signals at each of the frequencies, a narrow-band filter with a width of ± 5% of the signal frequency was used to eliminate ambient noise outside the studied frequency band (Fig. 4).

Fig. 4: Reconstructed signal value for different frequencies and cables

Conclusions

The results obtained in this test suggest that cable design can significantly contribute towards the performance of fiber optic sensing systems and their successful deployment and exploitation in the industry. The same level of response is expected when measuring strain. System designers need to take cable designs into consideration especially when a single cable should have mixed and multipurpose sensing features.

Implemented project

30 Jul 2020

Over 360 km of Wireline design WireCompoJack have been deployed and successfully operating at oil fields of one of Oil & Gas operators in Russia.

The cable provides connection of the surface interface unit with downhole measuring systems, lowered into the well.

Downhole measuring systems provide real-time monitoring of reservoir pressure and temperature at the pump intake. Thanks to this, the well operation modes are optimized.

All W&B cables pass the necessary qualification tests before delivery and show high operational reliability. Successful experience in the development and implementation of this type of cables allowed expansion of the Wireline family designs for Oil & Gas industry.

June Newsletter

25 Jun 2020

Wires&Bytes introduces downhole slickline cables for the Oil & Gas industry

Result of distributed temperature monitoring show immediate leak in tubing!

Fiber-only

Heavy duty

Elecro-optical

All Oil & Gas operators need access to data for reservoir management. Common applications are well integrity, well performance and well optimization. Leaks in the system can cause environmental expenses, inefficient artificial lift systems and costly unplanned workovers. These are difficult to detect and locate using conventional single point measurements.

The advent of Distributed Fiber Optic Sensing (DFOS) measurements allows operators to monitor the entire well length in real time for the duration of the survey which makes DFOS uniquely suited to detect hard-to-locate well integrity problems and to efficiently optimize gas lift systems. A key enabler to make real time DFOS measurements is a reliable fiber optic slickline. Together with the appropriate surface interrogation units, effective data processing and visualization software a fiber program can improve profitability.

A number of service providers are addressing fiber deployment issues specifically lowering the base cost which today limits the use of fiber optic technology. Advanced service providers are utilizing new low cost slickline deployment techniques which leverage existing infrastructure and require very little in the way of additional skills for technicians.

Wires&Bytes introduces a range of downhole hybrid slickline cables for application in coil tubing and well logging. These robust and retrievable cables, which can be exposed to the downhole environment including H2S and high temperature, are made of highly corrosion-resistant stainless steel wires. These cables are designed to have high breaking strength and can be used to perform for years of service.

SlickLight cable designs are available in the following configurations:

Fiber-only

This all-optical design comes with a range of fiber options, size, weight and rated breaking strength up to 7900 N. These cables are marketed with max deployment length of 5.0 km (16.400 ft).

Heavy duty

This heavy duty SlickLight cable is targeted for long and deviated wells with max rated breaking strength of 15800 N and max deployment length of 8.3 km (27.200 ft).

Electro-optical design

A hybrid version, which incorporates both optical fiber and copper. The optical fiber is used for DFOS measurement while copper is used for power and communication for electronic tools and tractors. Max rated breaking strength is 8200 N and max deployment length is 4.7 km (15.400 ft).

Important! Mechanical performance of fiber can be measured in our fully equipped lab according to your specifications or requirements.

Wires&Bytes has announced its expansion in the US with the launch of a new office and a key appointment!

17 Jun 2020

The Berlin-based company has opened its office in Arlington, TX, USA as part of global expansion plan and to meet growing demand for its technology and products in North and Latin America. The Texas office will be headed by Keith Russell who becomes Vice President of Business Development, Americas.

Prior to joining the company, Keith had various senior roles, most recent at Silixa as VP Operations, prior to that at Baker Hughes and Schlumberger as wireline, cased hole logging, artificial lift as well Fiber Optic sensing Specialist. Throughout his career, Keith has been actively involved in wireline applications, innovative sensing and monitoring technologies for Oil and Gas industry worldwide. Keith will be based in Houston to support the O&G customers.

Wires&Bytes is aiming to be one stop, customer oriented and market driven cable company, providing a suit of specialty cables, including slickline, wireline and permanently installed downhole cables for O&G as well as other harsh environment applications.

Alexander Smilgeivch, the President of Wires&Bytes, said: “We’re growing at a significant pace to support our customers and potential opportunities for our technology. We are investing in human resources as well in state-of-the-art equipment to cater this growth and challenges of these applications and opportunities. We’re excited you joined the team, Keith! Welcome onboard!”

Cryotest results

15 May 2020

The Specialty Cables for Oil & Gas require a stringent testing protocol before they are deployed in challenging applications.

Particularly, the cables used to monitor leaks for LNG pipelines and tanks need a well-defined qualification procedure. These cables are exposed to the harsh cryogenic temperature conditions and any underrated cable can fail to detect leaks and cause huge damages to human life and infrastructure.

Two cables design were tested in our testing facility. These cables were exposed to cryogenic temperatures (down to -170°C) in 4-hours cooling process and after it let warm up passively to the room temperature. The test results have shown no significant loss in optical fiber performance. Polyimide coated fiber was used in these cables.

Fig. 1 and 2: full and close up view charts of Samples 1 and 2

Fig. 3 and 4: Test results of Sample 1 and 2

Fig. 5: Optical loss test set-up at cryogenic temperatures

New design in SensoWire family

18 Feb 2020

Wires&Bytes presents a new design for wireline cabling. This cable was designed for oil and gas industry, in particular for logging into downhole for purpose of well intervention, reservoir evaluation, and pipe recovery.

Benefits of design:

1. Thanks to optical fiber, forming a part of new SensoWire, this design is used for industrial distributed sensing DTS/DAS.

2. Copper conductor incorporated in this design can provide power to equipment located at the end of the cable.

3. Double layer of stainless steel wires allows to lower equipment or measurement devices.

Discover more here

New state-of-the-art Brillouin analyzer

15 Jan 2020

Wires&Bytes test center introduced a new state-of-the-art measuring device: Brillouin analyzer based on Brillouin Optical Frequency Domain Analysis (BOFDA).

Unlike equipment measuring changes in signal phase and providing only averaged values of fiber elongation, with this device using Brillouin scattering it is possible to measure the distribution of mechanical stress and fiber elongation along the entire length.



With the help of this device, you get precise and complete information on the characteristics of specific delivery lengths of specialty cables used for distributed structural health monitoring.

This allows setting up the control system, which is faster and more efficient, ensuring predictable cable response to external events that need to be monitored.

Our clients from telecom sectors can be sure in high quality of cables, which means not only high characteristics of optical fiber, but also their reliability. BOFDA measurements ensure absence of critical fiber stresses inside the cable along the entire delivery length and under any external influences (tension, bending, torsion, high and low temperatures).