Use of a Combination Foamer, Corrosion and Scale Inhibitor to Improve Productivity in Tight Gas Formation
Enhancing Batch Chemical Efficiency: Extended ReleaseSemi-Continuous Corrosion Inhibitors
Steven J. Weghorn
Baker Petrolite Corporation
12645 West Airport Boulevard.
Sugar Land, TX 77478
Sunder Ramachandran (
Baker Petrolite Corporation)
,
Mack Duckworth (Devon Energy)
Kelly Johnson (Baker Petrolite)
, Bob Sharp (Baker Petrolite)
, Mike Hausam (Baker Petrolite)
12645 West Airport Boulevard.
Sugar Land, TX 77478
Vladimir Jovancicevic
Baker Petrolite Corporation
12645 West Airport Boulevard.
Sugar Land, TX 77478
Donald W. Stegmann
Baker Petrolite Corporation
369 Marshall Avenue
Saint Louis, MO 63119
ABSTRACT
ORIGINAL:
Of critical importance in the proper application of corrosion inhibitors within oil and gas producing wells is the timely delivery of the chemical throughout the system. In traditional batch treatment, an excess of chemical is required to ensure a sufficient quantity of corrosion inhibitor is applied to all metal surfaces. The performance of the chemical and the retreatment interval rely almost entirely upon the film persistency character of the traditional batch product. In contrast, using the encapsulated extended release (mass transfer controlled) solid corrosion inhibitor described in this paper the chemical performance and retreatment interval are based upon the inhibitor concentration in the system. That is, the extended release properties of the encapsulated product allow for significantly extended retreatment intervals while maintaining a more steady-state corrosion inhibitor concentration. The novel batch treatment regimen for application of this extended release product thus approximates in inhibitor level maintenance that targeted via a continuous inhibitor application. In this way, batch chemical treatment efficiency can be significantly enhanced and effective corrosion treatment can be more readily realized for remote wells and/or those that have treatment issues due to climate issues and other factors.
Suggested changes:
Although it is easy to find long -lived accumulations in fractured shale gas reservoirs, it is difficult to produce at economically viable gas rates from these reservoirs. Liquid loading, corrosion due to carbon dioxide, and solid deposition due to scale formation can limit gas production from wells operating from such a formation.
In this paper, specialty products that combinethat foamercombine foamer, corrosion and scale inhibition properties are described. One combination foamer, corrosion and scale product has been tested for capillary compatibility at temperatures as high as 280 F. When the product was used in the field, gas productivity from the wells increased considerably, greatly increasing the revenues from the field. The product was also used to prevent corrosion and scale formation in this field.
The presentation will talk about different features of the product with regards to gas well unloading, corrosion prevention, scale inhibition and field performance.
Timely delivery of corrosion inhibiting chemicals throughout oil and gas producing wells is critical to achieving protection against the destructive effects of corrosion. Of critical importance in Tthe proper application of corrosion inhibitors within oil and gas producing wells is critical so that is the timely delivery of a timely delivery of the chemical occurs throughout the system. In traditional batch treatment, an excess of chemical is required to ensure a sufficient quantity of corrosion inhibitor is applied to all metal surfaces. T the performance of the chemical and the retreatment interval rely almost entirely upon the film persistency character of the traditional batch product. Continuous application of inhibitor is more efficient from a chemical use standpoint, but may not be practical in many cases from an equipment and chemical storage perspective. In this paper the use of a semi-continuous mode of corrosion inhibitor application is presented. This semi-continuous approach is achieved using extended inhibitor release properties of a solid matrix encapsulated corrosion inhibitor. The result is a more efficient chemical treatment than conventional batch inhibitor application while approximating the more constant inhibitor levels targeted in continuous application. This technology affords the further advantage of being an effective means In contrasByt, using the encapsulated extended release (mass- transfer controlled) solid corrosion inhibitor described in this paper, the chemical performance and retreatment interval are based upon the inhibitor concentration in the system. That is, Tthe extended release properties of the encapsulated product allow for significantly extended retreatment intervals while maintaining a more uniformsteady-state corrosion inhibitor concentration. The novel batch treatment regimen for application of this extended release product thus approximates in inhibitor levels maintenance that are targeted via a continuous inhibitor application. This results in In this way, batch chemical treatment that is more efficientcy,, and can be significantly enhanced, and toof providinge effective corrosion treatment inhibition in can be more readily realized for wells that present treatment challenges due to climatic conditions or for those wells located in remote areas.wells and/or those that have treatment issues due to climate issues and other factors.