Stimulating mature reservoir with Fishbones technology

Given success in the pilot well with the Fishbones technology, we believe we can revise and increase our resource base for the Valhall field.

(If this is a topic that interests you, please join our afternoon session day 2, June 12 or at lunch meet on day 3, June 13)

“The Aker BP Valhall chalk reservoir is challenging and interesting in many ways,” says Fabian Bjørnseth, Reservoir Engineer in Reservoir Development in Aker BP.

The giant Valhall field has produced since 1982 and accumulated production surpassed 1 billion barrels oil equivalents early in 2017, more than three times the original estimates.

“The porous, but low permeable chalk reservoir requires stimulation, which is currently delivered by proppant fracturing. This process is time consuming and costly, and a pilot well with stimulation using Fishbones technology is planned later this year,” Bjørnseth explains.

He is optimistic about the pilot. “Fishbones has the potential to reduce stimulation time, cost, stimulation pressure, provide controlled stimulation and reduce risk of chalk influx – a powerful combination indeed!”

The Fishbone Technology that will be used on Valhall involves a short pumping operation that jets numerous titanium tubes out from the mother bore to create up to 12 meter channels. This increases productivity by creating inflow points away from the mainbore, connecting up with existing fractures and bypassing barriers to flow.

“The original Fishbones technology had to be modified for chalk reservoirs, and the equipment has been developed in a joint effort to meet the challenges. Given success in the pilot well, we may be able to make well targets that are currently marginal economical. This way, more wells can be drilled and more resources gained from the old giant,” says Bjørnseth, hoping to add more volume to existing estimates and prolong production.

You are welcome to visit us at stand 950 in the Exhibition Hall

Aker BP at EAGE2018