The Importance of Scale-Inhibitor Analysis - A State-of-the-Art Overview
- Adam Wilson (JPT Special Publications Editor)
- Document ID
- Society of Petroleum Engineers
- Journal of Petroleum Technology
- Publication Date
- September 2016
- Document Type
- Journal Paper
- 107 - 109
- 2016. Society of Petroleum Engineers
- 1 in the last 30 days
- 73 since 2007
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This article, written by Special Publications Editor Adam Wilson, contains highlights of paper SPE 179900, “The Importance of Scale-Inhibitor Analysis in Scale Management—A State-of-the-Art Overview To Provide Cost-Effective Scale Control From Simple to Complex Production Scenarios,” by Stephen Heath, SPE, Baker Hughes; Gill Ross, Shell; and Gordon Graham, SPE, and Kirsty MacKinnon, Scaled Solutions, prepared for the 2016 SPE International Oilfield Scale Conference and Exhibition, Aberdeen, 11–12 May. The paper has not been peer reviewed.
The accurate and precise analysis of scale inhibitors plays an important role in making key decisions on the efficiency of scale-squeeze and continuous-chemical-injection treatments. Numerous techniques exist for scale-inhibitor analysis, ranging from the simpler methods to more-complex techniques such as high-pressure liquid chromatography (HPLC) and mass spectroscopy (MS). This paper presents a state-of-the-art review of scale-inhibitor-analysis techniques and describes how these techniques can be used to provide cost-effective scale management.
Inorganic-scale deposition is a major problem encountered during production of oil and gas and is often managed by the use of chemical scale inhibitors to prevent scale from forming in the system through continuous chemical injection or by periodic batch squeeze treatments. In most cases, scale prevention through chemical inhibition is the preferred method of maintaining well productivity. Scale-inhibitor squeeze treatments provide one of the more common and efficient methods for preventing the formation of carbonate and sulfate scales in the near- wellbore region, tubing, and topside facilities of production wells.For any scale-management strategy where squeeze treatments are deployed, the objective will be to achieve the longest possible treatment lifetime to maximize oil production and minimize the number of costly well interventions, especially in complex production scenarios. In order to achieve the required longevity for squeeze treatments, it is essential to use a scale inhibitor that is fit for purpose for the proposed squeeze application (i.e., good scale-inhibition performance, nondamaging, good retention/ release properties, and readily and selectively detected to low levels in produced fluids). Indeed, the accurate and precise detection of the scale inhibitor in the produced fluids to low levels at or below the minimum inhibitor concentration (MIC) is a key factor to enable long treatment lifetimes and prevent wells from scaling.
|File Size||6 MB||Number of Pages||3|