Additive Scale Removal Based on Noncorrosive Organic Acid for Handling Silica and Carbonate Scale in Oil and Gas and Geothermal Wells

U. Pasarai, S. PancaWahyudi, A. Haans, I. Widiantara, Budi Saroyo
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Abstract

The silica and carbonate scale that forms along the production pipeline is a significant problem in the oil and gas and geothermal industry because it disrupts production operations. Silica and carbonate scales on the inside of the pipe cause blockage of flow and an increase in pressure. Failure of downhole settlement equipment will reduce the production capacity of the well, and the maintenance burden will increase. The main objective of this research is to test the reactivity of an environmentally friendly non-corrosive organic acid system based on vegetable fatty acids and carbohydrates with high dissolution efficiency for the treatment of silica and carbonate scales in geothermal and oil and gas fields. This paper provides information on laboratory analysis in terms of analysis of the composition of scale samples obtained through XRD analysis, acid system developed testing for dissolution efficiency at 50°C and 100°C for 1 hour, compatibility and stability testing, and testing the corrosive impact on coupon metal AISI CS-1019 samples at 100°C for seven days in a closed aging cell. Testing the concentration of the new organic acid system in high dissolution efficiency and low corrosion effect was carried out through laboratory-scale studies before being applied to field-scale operations. The results showed that the dissolution efficiency of the scale sample against the developed organic acid system (100% concentration) at 50 and 100°C for 1 hour showed reactive effect. Reduction rate of silicate-07; silicate-29; silicate-L1; silicate-KB1; carbonate-A3 at 50°C were 7.825%; 3.823%; 6.177%; 2.014%; 8.211%, and at 100°C were 12.884%; 0.631%; 15.047%; 0.103%; and 32.909%. The newly developed organic acid system demonstrates stability and compatibility with formation waters with low formed solids, and it has a pH of 6. The results of the corrosion rate test were carried out without an inhibitor at 100°C for seven days and gave a yield of 77.340 mils per year, while other commercial additives gave a yield of 2,525.120 mils per year. The new eco-friendly organic acid system has a good effect in helping dissolve silica and carbonate scales, safe for production equipment, and lowers high maintenance costs. Keywords: Organic Acid Scale Remover, Silica and Carbonate Scale, Environmentally friendly
基于无腐蚀性有机酸的添加剂除垢法处理油气井和地热井中二氧化硅和碳酸盐结垢
在油气和地热行业中,沿生产管道形成的二氧化硅和碳酸盐结垢是一个严重的问题,因为它会破坏生产作业。管道内部的二氧化硅和碳酸盐结垢会导致流体堵塞和压力增加。井下沉降设备的故障会降低油井的生产能力,增加维修负担。本研究的主要目的是测试一种基于植物脂肪酸和碳水化合物的环保型无腐蚀性有机酸体系的反应性,该体系具有高溶解效率,用于处理地热和油气田中的二氧化硅和碳酸盐结垢。本文提供了实验室分析方面的信息,包括通过XRD分析获得的水垢样品的组成,开发的酸体系在50°C和100°C下1小时溶解效率测试,相容性和稳定性测试,以及在封闭老化槽中在100°C下7天对残余金属AISI CS-1019样品的腐蚀影响测试。在应用于现场作业之前,通过实验室规模的研究测试了新型有机酸体系在高溶解效率和低腐蚀效应方面的浓度。结果表明,在50℃和100℃条件下,水垢样品对所制备的有机酸体系(100%浓度)的溶解效率均为反应性效果。硅酸盐-07的还原率;silicate-29;silicate-L1;silicate-KB1;50℃时碳酸盐- a3为7.825%;3.823%;6.177%;2.014%;8.211%, 100℃时为12.884%;0.631%;15.047%;0.103%;和32.909%。新开发的有机酸体系具有稳定性和与低固相地层水的相容性,pH值为6。在不添加缓蚀剂的情况下,在100℃下进行了7天的腐蚀速率测试,结果表明,缓蚀剂的收率为每年77.340 mils,而其他商业添加剂的收率为每年2525.120 mils。新型环保型有机酸体系具有良好的溶解二氧化硅和碳酸盐垢的效果,对生产设备安全,降低了高昂的维护成本。关键词:有机酸除垢剂,二氧化硅和碳酸盐结垢,环保型
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