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N-Line Tools
Paraffin Heater Treater Test at RMOTC
June 2005

PROJECT DESCRIPTION

N-Line Tools installed its downhole paraffin heater treater in a producing well at Teapot Dome Field (NPR-3) in Wyoming operated by the Department of Energy. The well was chosen by two petroleum engineers because of its severe problems with paraffin and its low reservoir temperature of about 74° F. Before the test began the well, which was producing from the Shannon Sandstone on rod, pump at less than 800 feet had been in production for over three months.

PURPOSE

The purpose of the test was to verify the effectiveness of a newer generation of digital downhole heaters designed to reduce or eliminate paraffin buildup in perforations (when placed close to the perforation), downhole production equipment including tubulars and rod string, surface flowlines and production facilities.

RESULTS

Prior to the installation of the downhole heater device, the well was making less than 15 barrels of fluid per day of which 1.5 to 2.0 barrels was oil. Following the proper installation of the digital downhole heater, and after several days of production, the well had a surface fluid temperature of about 110° F and a downhole temperature of 160° F. This resulted in an over 300% increase of total fluid production, 44.8 BFPD with an oil cut of about 17-18%, or about 4.5 BOPD that is an over 300% increase in oil production.

There was no evidence of paraffin in the flowlines, or on the rods or pump. When used with a rod pump, I would recommend using a pump that can tolerate the higher temperatures generated by the heater which will result in flawless long-term proper operation of the producing well.

BENEFITS

This equipment should be used in other similar type well and I believe, based on the recorded data that the increase in production was due to at least three factors. 1) continued proper operation of the insert type pump due to no paraffin buildup, 2) the higher downhole temperatures resulted in the clogged perforations being opened to their original aperture, and 3) the heater generated enough heat to prevent paraffin precipitation at some distance from the perforation resulting in a larger productive surface area and higher total production.

While the test was being run, I was the project manager for this project at RMOTC. Please feel free to contact telephone or email me if you have any questions.

Bryant Mook, B.S., M.E.
Petroleum Engineer and Geologist

 

N-Line Tools installed its downhole paraffin heater treater in a producing well with known paraffin problems. The well has been on production for three months.