AICV®
Autonomous Inflow
Control Valve

Increasing oil production worldwide

Through several successful installations in Norway, Saudi Arabia, Canada and China, the leading edge AICV® technology has demonstrated significant increase of oil production. At the same time the gas oil ratio (GOR) and/or water cut (WC) have been reduced significantly.

 

The first field installation of AICV® was presented in the Kingdom of Saudi Arabia during The SPE 2016 Annual Technical Symposium and Exhibition in Dharan the 26th – 28th of September 2016. The paper Optimizing Reservoir Performance through Utilization of Autonomous Inflow Control Valve describes lessons Learnt from this World’s First Installation August 2015.

The novel Autonomous Inflow Control Valve (AICV®) shuts off unwanted fluids completely ensuring optimum gas or oil production and recovery.

Several successful installations
In addition to Saudi Arabia, the AICV® technology have been successfully installed and tested in several wells around the world, including Norway, Canada and China. The installations have been onshore and offshore, in carbonate and sand stone reservoir, in new and existing wells.

More information?
Some of our early partners are already in the process of planning for use and implementation of the AICV® technology in their next wells. Now we are looking for more business partners around the world. Please contact us for more information

About the AICV®
The patented AICV®, Autonomous Inflow Control Valve, is the first and only known technology that can shut-off the gas and/or water autonomously and locally in the well. The AICV® combines the best from passive Inflow Control Device (ICD), Autonomous ICD (AICD) and smart wells (ICV). The AICV® will significantly reduce the water cut (WC) and gas oil ratio (GOR) in your well. Read more about the features and benefits of the AICV® technology:

Making oil fields more profitable

The AICV® technology can make mature and marginal fields more profitable.

An important issue is to improve oil recovery from existing fields by developing and implementing new technologies that can make mature and marginal fields more profitable. In most oil fields, the draining mechanism is based on pressure support from gas and/or water. This means that after a period of production, all wells will have gas and/or water breakthrough. As a breakthrough expands along the horizontal well, production has to be limited due to excessive gas and/or water production. This means that production from the well has to be choked or stopped, even if there is oil left along the wellbore. Inflow Control Device (ICD) and the early versions of Autonomous Inflow Control Devices (AICD) have shown that oil production and recovery can be increased significantly with better inflow control along the well. However, neither ICD nor AICD is able to shut off unwanted gas and water production completely. The newly developed and patented Autonomous Inflow Control Valve (AICV®) can shut off unwanted liquids completely. This novel technology is a major step for improved oil recovery, both in new and old wells.

Autonomous and robust

AICV® is completely self-regulating, and does not require any form of control, electronics or connection to the surface.

This provides the operator with significantly more efficient production and increased recovery. The AICV® technology also makes it possible to drill longer wells and achieve maximum reservoir contact from each one.

Shuts off water completely and locally

The AICV® autonomously and almost completely shuts off unwanted liquids such as gas and/or water.

In the event of a gas/water breakthrough, the AICV® will immediately shut off the flow. Oil production will continue from the other inflow zones along the well, ensuring optimum oil production and recovery. This means that oil production can continue at undiminished high flow rates in the zones that are not affected by the gas or water breakthrough.

Flexible and adaptable

The AICV® can be designed for your applications

That means that your ICD strength and partly or full choking of gas. steam and/or water. The AICV® can be adjusted to fit your reservoir strategy.

Retrofitable

The AICV® can be installed in both new and old wells.

Simple

The construction of the AICV® is solid and uncomplicated with very low risk of failure.

Reversable

The AICV® allows oil production after an earlier breakthrough.

Compatible

The AICV® is adaptable and compatible with standard completions (screens).

 

The AICV features:

  • Autonomous: requires no external power or control
  • Simple: uncomplicated with low risk of failure
  • Effective: can stop gas/water completely
  • Reversible: allows oil production after an earlier breakthrough
  • Distribution: no limit in number of zones
  • Retrofitable: can be installed in new and old wells
  • Compatible: with standard completion (screens)
  • Flexible: can be adjusted to fit reservoir strategy
Our product range:

 

 

The historical development of oil wells and inflow control:

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Vertical Oil Wells

Until the 1970’s, most oil wells were vertical. However, the earliest known oil wells were drilled in China in 347 [AD]. These reached depths of up to about 240 metres and were drilled using bits attached to bamboo poles…

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In North America, the first commercial oil well entered operation in Oil Springs, Ontario in 1858, while the first offshore oil well was drilled in 1896 at the Summerland Oil Field on the California Coast. The earliest oil wells in modern times were drilled percussively, by repeatedly raising and dropping a tool attached to a cable into the ground. In the 20th Century, cable tools were largely replaced by rotary drilling, which could drill boreholes to much greater depths and in less time. Until the 1970s, most oil wells were vertical, although lithological and mechanical imperfections cause most wells to deviate at least slightly from true vertical. Read more about the history of oil drilling at Wikipedia

Horizontal Wells

The first horizontal wells were drilled in 1937 in Yarega, USSR. Several horizontal wells were drilled in the McConnelsville area in Ohio from 1939-41, followed by horizontal wells in the rest of the USA, China, Venezuela and others…

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However, until the 1970’s, most oil wells were vertical. In the late 70’s modern directional drilling technologies allowed for strongly deviated wells, and in some cases became horizontal. This was of great value, as reservoirs are usually horizontal, or sub-horizontal. A horizontal wellbore placed in a production zone has more surface area in the production zone than a vertical well, resulting in a higher production rate. The use of deviated and horizontal drilling made it possible to reach reservoirs several kilometres or miles away from the drilling location, allowing for the production of hydrocarbons located below locations that are either difficult to place a drilling rig on, environmentally sensitive, or populated.

The first offshore horizontal wells were operated by Elf in Italy in 1981.

Horizontal wells have been globally used to maximize reservoir contact and ultimately improve well performance. Variations in permeability, pressure and frictional pressure drop along horizontal sections can create non-uniform inflow profiles, which can lead to early breakthrough of water and gas in a reservoir with an aquifier and/or gas cap. Breakthrough typically occurs in regions of high permeability or at the heel of the lateral section in homogenous reservoirs. This ultimately leads to a reduction in reserve recovery and well performance.

oil rig

Passive Inflow Control Device (ICD)

The first known installation of passive inflow control devices (ICD) was Norsk Hydro at the Troll field in the North Sea in the early 1990’s as a means to enhance the oil recovery of the thin oil rim at Troll…

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The original ICD concept had a number of labyrinth channels installed within a pre-packed screen mounted on a solid base pipe. Most of the shortcomings of open hole horizontal wells were solved with the introduction of ICD. ICD introduced a pressure drop from the reservoir and into the well. Consequently, ICD systems managed better non-uniform inflow profiles along horizontal sections. All leading suppliers of technology to the upstream oil and gas industry have now developed their own passive ICD design (channels, orifice or nozzle) for the mechanism to create flow resistance. All designs can be mounted on a standalone screen.

aicv

Autonomous Inflow Control Device (AICD)

In the early 2000’s the Troll field used passive inflow control devices as standard to delay unwanted gas breakthrough…

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The production engineers realized that ICDs delayed gas breakthrough from the large gas cap, but were not able to stop it.

In 2006, Haavard Aakre and Vidar Mathiesen invented the RCP (Rate Controlled Production) valve, also known as the Statoil AICD. The RCP was the first autonomous inflow control device that was installed in a field test. It was successfully tested and implemented in a number of wells, i.e Q-21, P-13 and P-21. The RCP valve performance was verified by field testing and has been in operation for at least 5 years without any failure. Tests showed that oil production was increased by 20 % compared to passive ICDs.

Autonomous Inflow Control Valve - the AICV®

Autonomous Inflow Control Valve - the AICV®

The same people that invented and developed the first autonomous inflow control thought it was possible to improve water and gas choking…

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The newest generation of inflow control, named Autonomous Inflow Control Valve (AICV®) was invented in 2012 by the founders of InflowControl AS. Extensively development and qualification projects have been established. The 3 first field test installations on different applications such as light, medium and extra heavy oil respectively, were successfully performed in 2015.