E&P Case Study: Technology to Improve Oil Recovery of Water Injection Wells

Here’s a new autonomous outflow control device developed by Tendeka to improve water injection conformance and potentially create a short-circuit to production wells.

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To improve oil recovery, several techniques have been applied to improve the water conformance of injection wells. While standalone passive flow control devices combined with sliding sleeves have been successful to improve the conformance in the wells, they may fail to provide the required performance in the reservoirs with complex/dynamic properties including propagating/dilating fractures or faults and may also require costly and complex intervention.

Compared to active inflow control devices (ICVs), which can change the inflow area and ultimately control the well in a proactive and/or reactive manner, passive devices, such as outflow control devices (OCDs) a.k.a. ICDs, are less expensive and create completion with a fixed configuration influencing the well’s outflow. However, the effectiveness could be limited if the well completion with the OCD is not properly designed. It can be even less effective if there are dynamic changes in reservoir properties. Although autonomous devices have been used in production wells, there have been no applications of autonomous devices in injection wells. 

Global production optimization specialist, Tendeka, has developed a new autonomous outflow control device (AOCD), FloFuse (Figure 1), to selectively choke the injection of fluid into the growing dilated/propagated thief zones such as fractures, faults and high perm streaks crossing the well. Therefore, this technology mitigates disproportional injection of fluid into the thief zone which could potentially create a short-circuit to production wells.

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