Long-Term Scale Inhibition Using a Solid Scale Inhibitor in a Fracture Fluid
| Autor: | Sandra L. Noe, Gary Gallup, James Michael Brown, Steve Szymczak |
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| Rok vydání: | 2006 |
| Předmět: | |
| Zdroj: | All Days. |
| DOI: | 10.2118/102720-ms |
| Popis: | Prolonged scale inhibition in excess of one year is a desirable benefit of oil and gas well formation squeeze treatments. Traditionally liquid inhibitors have given the requisite inhibitor residual for up to one year. Operators desire longer inhibition periods. This paper describes a new scale inhibitor technology that extends scale inhibition beyond one year. All of the components of a hydraulic fracturing package must be compatible to insure that the rheology of the fluid is not affected. The placement of a scale inhibitor onto a formation requires a suitable inhibitor that will adsorb to the mineral surfaces and return slowly with the produced water. Adding a solid scale inhibitor to a frac package required limited compatibility testing and reformulation in order to meet the fluid integrity and product effectiveness criteria. The scale inhibitor dosage was designed for a three-year life. The accepted method of monitoring the effectiveness of a scale inhibitor squeeze is through measuring the scale inhibitor residual in the produced water. Traditional liquid scale inhibitors give a high initial residual (>1000-ppm) and deplete to a minimal level (1-10 ppm) within a year. The solid inhibitor placed on the formation during the frac released a residual below 50 ppm at the first reading and has maintained an acceptable level for the life of the placement (as of this writing the residuals are still above the minimum level). Operators of offshore and remote area wells that are prone to scale deposition must undertake significant intervention measures to remediate scale deposition.1 This new chemical technology extends the life of a scale inhibitor placement beyond the current expectations. The advancement of this technology will save operators money and encourage the development of properties that might be viewed unprofitable due to the high frequency and cost of intervention. |
| Databáze: | OpenAIRE |
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