摘要
针对徐深气田深度≥3000 m、井温≤150℃、冬季时间长、气温低的特点,以马来酸酐、十六胺、无水亚硫酸钠为原料,通过酰胺化反应和磺化反应两步合成了阴离子表面活性剂棕榈酰胺磺基丁酸二钠(ASB-16A).将ASB-16A与优选的起泡剂月桂基葡糖苷(APG1214)、防冻剂乙醇、去离子水混合制得耐寒耐高温泡排剂(CYY-1).评价了CYY-1的泡沫性能、耐高温性能、低温稳定性、与地层水的配伍性,并在徐深气田进行了现场应用.结果表明,CYY-1的最优配方为:10%ASB-16A、10%APG1214、44%乙醇,其余为去离子水.CYY-1的起泡性和稳泡性较好.在80℃下,1.25%CYY-1溶液的初始泡沫高度为150 mm,静置3、5 min的泡沫高度分别为150、75 mm,携液量为1100 mL.在150℃、pH=8.5的弱碱条件下老化24 h,对CYY-1的泡沫性能影响较小.CYY-1的低温稳定性好于常用的低温泡排剂.在-35℃冷冻7 d,CYY-1变浑浊,但仍可在管线中流动,满足装置自动加注要求.CYY-1与地层水的配伍性良好,0.5%～10.0%的溶液在常温下静置48h后仍澄清透明,可以实施自动化泡排加注.在现场试验2口井,某井日产气量由2.46×104 m3增至3.07×104 m3,日产水量由5.77 m3降至3.70 m3,实现稳定带水生产.CYY-1适用于井温≤150℃、矿化度≤16 g/L、pH值为8.5的气井的泡沫排水采气.
Abstract
The depth of Xushen gas field is greater than or equal to 3000 m,the well temperature is less than or equal to(le)150℃,meanwhile,the climate character is long wintertime and low temperature.Aiming at these characteristics,the anionic surfactant palmitamide sulfobutyrate disodium(ASB-16A)was synthesized using maleic anhydride,cetamide and anhydrous sodium sulfite by two steps of amidation and sulfonation reaction.ASB-16A was mixed with foaming agent lauryl-glucoside(APG1214),antifreeze ethanol,and deionized water to prepare a bubble agent(CYY-1)with cold and high temperature resistance.The foam performance,high temperature resistance,low temperature stability and compatibility with formation water of CYY-1 were evaluated.Finally,CYY-1 was applied in Xushen gas field.The results showed that the optimum formula of CYY-1 was obtained as follows:10%ASB-16A,10%APG1214,44%ethanol,and deionized water.CYY-1 showed better foaming and steady blebbing properties.At 80℃,1.25%CYY-1 solution had an initial foam height of 150 mm,a foam height of 150 mm and 75 mm for 3 min and 5 min standing time,respectively,and a liquid volume of 1100 mL.The aging under weak base conditions,such as 8.5 pH value,150℃and 24 hours,had little effect on the foam performance of CYY-1.The stability at low temperature of CYY-1 was better than that of commonly used low temperature bubble agent.After freezing at-35℃for 7 d,CYY-1 became cloudy.But it could still flow in the pipeline,which met the requirements of automatic filling of device.The compatibility of CYY-1 with formation water was good.0.5%—10.0%solution was still clear and transparent after standing for 48 hours at room temperature,so automatic bubble filling could be implemented.Two wells were tested in the field.The daily gas production of one well increased from 2.46×104m3 to 3.07×104m3.Meanwhile,the daily water yield decreased from 5.77 m3 to 3.70 m3.Stable carrying water production was achieved.CYY-1 was suitable for foam drainage gas production of well temperature le 150℃,salinity le 16 g/L and pH value of 8.5.
基金项目
中国石油大庆油田有限责任公司科研项目(dqp-2021-cygcky-002)
NETL
NSTL
万方数据