Case Study: AICD Screen Eliminates Water Breakthrough in Horizontal Heavy Oil Well — Bohai Bay

At a Glance

• Location: Bohai Bay, Offshore China
• Well Type: Horizontal producer, 1,200m lateral section
• Formation: Unconsolidated sandstone, heavy oil (API 14°)
• Challenge: Uneven inflow profile, sand production, water breakthrough at heel
• Solution: Jingtao Energy AICD Screen , pure mechanical autonomous inflow control
• Result: Water cut reduced from 78% to 32%, oil production increased 41%, sand-free operation

The Challenge: Heel-Dominated Inflow and Premature Water Breakthrough

A major operator in Bohai Bay brought a horizontal heavy oil well online in early 2025. The 1,200-meter lateral section traversed an unconsolidated sandstone formation with significant permeability variation along the wellbore. Within months, the heel section dominated production while the toe contributed less than 15% of total flow.

More critically, water breakthrough occurred at the heel at month five, driving water cut to 78%. Conventional ICD (Inflow Control Device) screens, which rely on fixed orifice restrictions, could not adapt to the changing fluid composition , they choked all fluids equally, including the oil the operator needed most.

The Solution: Jingtao Energy AICD Screen Technology

Jingtao Energy proposed its proprietary Autonomous Inflow Control Device (AICD) Screen , a pure mechanical solution with zero electronics, zero moving parts, and zero chemical dependency. The AICD’s labyrinth flow channel geometry creates a viscosity-dependent flow restriction: high-viscosity oil flows freely, while low-viscosity water and gas encounter exponentially higher resistance.

Key Technical Specifications

• Filtration rating: 10, 20 μm ceramic-coated mesh
• Flow channel: Labyrinth geometry, no moving components
• Autonomy: Passive , responds to fluid viscosity in real time
• Material: Corrosion-resistant alloy, NACE MR0175 compliant
• Application range: Light to heavy oil (API 10°, 35°)
• Installation: Standard screen running procedure, no special tools required

Implementation: Rig-Less Workover with AICD Completion

The well was pulled and the original completion was replaced with a segmented AICD screen completion in Q3 2025. The 1,200-meter lateral was divided into 6 compartments using swellable packers, with AICD screens customized to each compartment’s permeability profile. Heel sections received more restrictive AICD flow channels to balance inflow, while toe sections received less restrictive channels to encourage contribution.

The screens were manufactured at Jingtao Energy’s 10,000+ ㎡ facility in Dongying, China’s oil equipment manufacturing hub. Each screen section underwent full flow loop testing with representative fluid samples before shipment.

Results: 90-Day Production Data

Metric	Before AICD	After AICD
Oil Production	62 bopd	87 bopd (+41%)
Water Cut	78%	32% (-59%)
Sand Production	Intermittent	None
Toe Contribution	<15% of total flow	34% of total flow
Gas-Oil Ratio	Stable	Stable throughout
Well Intervention	N/A	0 interventions in 6 months

At the 90-day mark, the AICD completion had fundamentally transformed the well’s production profile. Water cut dropped from 78% to 32% as the labyrinth channels autonomously choked water inflow at the heel while allowing oil to flow unimpeded. Oil production rose 41%, driven primarily by toe sections that had previously contributed almost nothing. Sand production, a persistent issue with the original completion, was eliminated by the ceramic-coated mesh filtration.

Why This Matters for Your Operations

• No electronics = no failure points. Unlike intelligent completions with downhole gauges and control lines, the AICD has zero electronic components, eliminating the most common failure mode in advanced completions.
• Chemical-free. The AICD requires no chemical injection, no power supply, and no surface control systems , reducing both CAPEX and OPEX compared to active flow control solutions.
• Retrofittable. The AICD screen runs on standard completion procedures with no special rig requirements, making it suitable for both new wells and workovers.
• Customizable. Jingtao Energy designs AICD flow channels specific to each well’s fluid properties, ensuring optimal viscosity-based discrimination between oil and water.

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Ready to Solve Your Well’s Water Breakthrough Problem?

Every horizontal well is different. Jingtao Energy’s engineering team will analyze your specific well conditions , fluid properties, permeability profile, and production targets , and design an AICD completion tailored to your reservoir.

Send us your well data and we’ll return a customized AICD design within 48 hours.

📊 Download AICD Technical Datasheet , Full specifications, flow loop test data, and material certifications.

Technology FAQ

How does AICD screen technology solve water breakthrough in horizontal heavy oil wells?

Autonomous Inflow Control Devices dynamically restrict water-producing zones while maintaining oil flow from productive sections. The passive valve technology requires no downhole power or surface control, responding purely to fluid viscosity differences between oil and water.