SPE Member

Abstract

This paper will explain and demonstrate a method to increase production in individual wells or fields with skin damage, due to production in individual wells or fields with skin damage, due to paraffin accumulations, corrosion, emulsion and scale formation, paraffin accumulations, corrosion, emulsion and scale formation, utilizing an individual treatment design from a library of facultative anaerobic microorganisms.

These neutrally charged marine organisms, in a saline solution of nutrients, are naturally occurring, non-pathogenic, non-toxic, non-carcinogenic, non-combustible and require no permits from the Environmental Protection Agency for storage, transportation or disposal. Environmentally, these microorganisms are as safe as any product in our industry to control and reduce skin damage.

Paraffin, corrosion, emulsion and scale formation have resulted Paraffin, corrosion, emulsion and scale formation have resulted insignificant economic losses, reducing profitability for producers and operators. The resulting skin damage can be producers and operators. The resulting skin damage can be controlled and reduced through proper treatment by locating microorganisms in the immediate formation, perforations, and in the case of most problem preventing restrictions in production streams or failures in lifting equipment. Traditional control methods for treatment involve implementing techniques such as hot oiling, paraffin cutting, chemical and condensate treatments. These techniques have been marginally successful, economically prohibitive and temporary at best. Many of these traditional prohibitive and temporary at best. Many of these traditional methods are dangerous from a safety standpoint and often have caused serious long term damage to the productive life of the well (especially in the case of hot oiling).

Introduction

Paraffin skin damage can either be naturally occurring or man-made Paraffin skin damage can either be naturally occurring or man-made due to repeated hot oil-hot water treatments down the annulus, Naturally occurring paraffin is due to a formation temperature lower than the cloud point of the fluids produced. Paraffins created by hot oil-hot water treatments can cause a large amount of skin damage due to the liquids burning off the lighter hydrocarbons and pushing the heavier ends, possibly pulled from the bottom of a stock tank, downhole. Both types of damage reduce the effective permeability and porosity at or near the formation face while a hot permeability and porosity at or near the formation face while a hot oil treatment can cause plugged perforations and restrictions in the wellbore.

Since the microorganisms thrive at the oil/water or water/ paraffin contact, they will naturally seek out the paraffin skin paraffin contact, they will naturally seek out the paraffin skin damage and gradually remediate the high carbon chain paraffins with a cloud point above the formation temperature. This remediation process will gradually biodegrade the skin damage that is process will gradually biodegrade the skin damage that is interfering with the natural inflow of fluids into the wellbore and control formation of paraffin accumulations in the production system.

Bio Tech, Inc. is monitoring ninety-one (91) wells throughout Oklahoma, since December of 1990, for an independent oil and gas operator.

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