AICV®
Heavy Oil

AICV® Heavy Oil

The AICV® Heavy Oil is open for Heavy Oil 10 < API < 22 and chokes back water and gas. The AICV® Heavy Oil is extensively tested and qualified for oil viscosity at reservoir conditions from 50 -500 cP. The first installations are planned onshore China and Europe during 2016.

The AICV® flow performance curve for single phase medium oil, water and gas is shown in Figure 1. The figure shows that unwanted production of gas and water is efficiently choked. Oil ICD strength can be varied, depending on the reservoir and well performance.

The choking sequences for the AICV can be optimized by the number of valves in each zone. Each zone is isolated with packers in the annulus along the horizontal section . The choking sequence for water is shown in Figure 2, and represents a zone with five AICVs. When pure oil is produced from the zone, all AICVs are open. When water breaks through the local water cut increases, and the AICVs start to choke. The AICVs close fully only when there is almost no oil (less than 2%). The AICVs will autonomously open when the zone is refilled with oil.

The choking sequences for gas are shown in Figure 3, and represent a zone with five AICVs. The closure sequence shows that with pure oil all AICVs are open. When the free gas increases in the zone, the local GVF increases and the AICVs start to choke. The AICVs close fully only when there is almost no oil (less than 2%). The AICVs will autonomously open when the zone is refilled with oil.

Figure 1: Typical flow performance curve for Heavy Oil AICV®.

Figure 1: Typical flow performance curve for Heavy Oil AICV®.

Figure 2: Closure sequence with inflow of water in a zone with five 4bar AICV®.

Figure 3: Closure sequence with inflow of gas in a zone with five 4bar AICV®.