Case Study: Wellbore Production - Nigeria 6

30 Years old and as good as new.

In 1989 an operator drilled a well onshore in Nigeria using water based mud. Over the years the production in the well continued to drop and ultimately oil flow was 0 bbl/day. No further production was forthcoming.

On a number of occasions the well was acidized but all attempts to stir the well to life were in vain. The screen was completely blocked and there was also wax in the tubing.

The SAS Solution

Fast forward to 2019 and SAS Production Services chemistry is called in to try and bring the well back to life. Using our microemulsion chemistry and using our micro-dispersant for the wax the chemicals were put to work via coiled tubing in the well. The chemical blend was pumped down into the reservoir section. Injection into the reservoir was made possible by series of pump and relax sequence until the near wellbore pores opened enough to allow smooth and steady pumping rate into the formation.

After a soak period, the well was opened and measurements were taken to see if our chemistry had brough the oil flow back to life.

Results

Results show that production increased from 0 Bpd to 2,880 Bpd on 32/64” choke and with a BSW of 5%.

It goes without saying that the customer was pleased with the production gain. Four more well are coming up and we will let you know how we get on those wells.

For now, if you want to see what we can do with your well, please do get in touch. We would love to hear from you!

From 0 to 1,200 with SAS Breaker

The story you know - Well Performance

When it comes to well performance every story starts the same. An operator in Nigeria approached us with a well drilled in 1992 using water based mud and with a current production of 0 bbl/day. Over the years production had gradually declined until finally oil flow stopped entirely. The oil for this particular well was quite heavy at 16 API and gas lifts and acid treatments had all come to nothing.

The story we want - Well Stimulation

We love ourselves a challenge and a non-producing well where the competition has not had any results is almost too good a challenge to ignore.

And so the SAS Breaker 162B was called into action. This microemulsion product has shown itself effective around the world from India to the North Sea and the Middle East. This time Nigeria was the destination for the SAS Breaker 162B.

The well itself was a vertical in sandstone. Using a coiled tubing unit the product was placed in the well and left to soak. It restored the near-wellbore permeability by completely removing the near wellbore damage and water-wetting the sand grains.

After the soak period both strings were opened. The short string production increase from 0 Bopd to 450 Bopd (without gas lift), while the long string production increased from 0 Bopd to 750 Bopd (with gas lift). Both strings have 0% BSW.

A completely dead well was revived and brought back to life producing 1,200 barrels of quality oil per day. Not bad for a happy ending!