钻井用耐盐抗高温发泡剂的制备和性能研究

PREPARATION AND PERFORMANCE OF AN ANTI SALT AND HIGH TEMPERATURE FOAMER FOR DRILLING WELLS

为开发和控制低压低渗油气藏钻井工艺的需要 ,将十二醇在TBE催化剂存在下 ,与环氧氯丙烷作用 ,生成氯代脂肪醇醚Ⅰ ,在NaOH溶液中进行环氧化得到中间产物Ⅱ ,将Ⅱ和NaHSO3 作用合成出阴离子表面活性剂AGES。用WaringBlender法对合成的产品在不同条件下的泡沫性能进行研究 ,结果表明 ,AGES起泡能力强 ,泡沫稳定性好 ,在Ca2 + 浓度为 5 0 0 0mg/L ,矿化度为 5 .0× 10 4 mg/L的混合盐水中或有 2 0 %煤油存在下的泡沫性能均优于SDS和ABS ,而且在 2 5 0℃下滚动加热 6hr也很少分解。

A foaming agent AGES for drilling wells has been synthesized for meeting needs of drilling technology with low pressure, low permeability oil and gas reservoir. It is synthesized by reacting dodecanol with epicholorodydin under catalyst TBE to produce choloro dodecanol ether Ⅰ, which epoxidated in NaOH solution to form intermediate product Ⅱ, and then reacted with NaHSO 3 to obtain an anionic surfactant AGES. The properties of the product were tested by Waring Blender. Results show that AGES has excellent performance in aqueous solution with Ca 2+ 5000 mg/L, salinity 5.0×10 4 mg/L, or in 20% kerosene. It didn't decompose when used in 250℃ for 6 hours.