改性柚子皮降滤失剂的合成与评价研究

Synthesis and evaluation of modified pomelo peel fluid loss additives

摘要:

天然材料因其易降解、环境友好、来源丰富和价格低廉等优势，成为环保型钻井液处理剂研发的重要方向。在天然柚子皮的基础上，通过化学合成引入酰胺基和磺酸基，形成了一种可满足高温地层绿色、安全、高效钻进的改性柚子皮降滤失剂，并对其抗温性、抑制性和抗盐抗钙性能进行了评价。柚子皮富含植物酚和聚糖等活性成分，改性后的柚子皮抗温能力强，在150 ℃的滤失量降低率超过70%；滚动回收实验结果表明，在加量为0.3%的情况下，其抑制效果优于KCl；抗污染实验表明，改性柚子皮降滤失剂抗盐抗钙效果好，0.3%的加量下，在淡水基浆、盐水基浆、饱和盐水基浆中均能使滤失量保持在10 mL以下，在CaCl₂含量为3%时，滤失量降低率达到82.22%。改性后的柚子皮具有良好的降滤失性能，为环境友好型钻井液处理剂的开发提供了新的技术思路。

Abstract:

Natural materials have become an important direction for the research and development of environmentally friendly drilling fluid treatment agents due to their advantages of easy degradation， environmental friendliness， rich sources， and low prices. Based on natural pomelo peel， amide and sulfonic acid groups were introduced through chemical synthesis to form a modified pomelo peel fluid loss reducer that can meet the requirements of green， safe， and efficient drilling in high-temperature strata， and its temperature resistance， inhibition， and salt and calcium resistance performances were evaluated. Pomelo peels are rich in active ingredients such as plant phenols and polysaccharides. The modified pomelo peels have strong temperature resistance and a filter loss reduction rate exceeding 70% at 150℃. The rolling recovery experiment results show that at a dosage of 0.3%， its inhibitory effect is better than KCl. The anti-pollution experiment shows that the modified pomelo peel fluid loss additive has good salt and calcium resistance. At a dosage of 0.3%， it can keep the filter loss below 10 mL in fresh water base mud， salt water base mud， and saturated salt water base mud. When the CaCl₂ content is 3%， the filter loss reduction rate reaches 82.22%. The modified pomelo peels have significant fluid loss reduction properties， providing new technical ideas for the development of environmentally friendly drilling fluid treatment agents.