Over the Past 4 Years, Arkoma Has Had a Successful Condition Based Soap Injection Program

Re-Inventing Soap Applications in Arkoma

Alison Vergari (, 281-366-7547

British Petroleum

Abstract

Arkoma has had a successful Condition Based Soap Injection (CBSI) program during the past 4 years, with over 150 current installations. This soap application technique was originally developed by Arkoma personnel. We will review the CBSI process and present some well examples.

Arkoma is also refining how we soap our wells. A downhole video experiment allowed us to monitor the time for soap to reach bottom, and where water is dropping out in the wellbore. As a result, we've been able to reduce the shut-in time, which translates into more gas production. Here's a description of the main cameraviews shown during the5 minute video, and the key outcomes:

·  Perforations in the production zone and a water level in the production casing covering some of the perforations.

·  The camera view is looking down the wellbore, about 1 ft above the end of tubing. Can see whatthe soap batch looks like over time as it falls out of the casing and to the perforations.

·  The soap falls significantly faster than our previous "rule of thumb". 3700 ft/hr fall time from the video vs. 2000 ft/hr previous rule of thumb. This translates to being able to bring our wells on sooner after batches, provided the bottom hole pressure has built up enough.

·  Another camera view at shallower depths shows pitting on the pins, whichis typicallywhere our watercondenses out of the gas.The camera view also showsthe water build-upspinning in the couplings. This is our main corrosion mechanism.

·  Water foams in slugs, not a continuous foam column, as it is brought to the surface.

We are also leveraging our 250 existing soap installations to deliver corrosion inhibition chemicals. This has been achieved through development and testing of a foamer and corrosion inhibitor combination product designed exclusively for this application.