一种新型泡沫隔离液体系的研究及评价  

Research and evaluation on a new foam isolation liquid system

作　　者：丁玉 黄峰 DING Yu;HUANG Feng(Oilfield Chemical Division,COSL,Langfang Hebei 065201,China)

机构地区：[1]中海油服油田化学事业部,河北廊坊065201

出　　处：《石油化工应用》2024年第5期114-117,共4页Petrochemical Industry Application

摘　　要：受深水井身结构及水下井口系统限制,随着地层流体产出,由于流体的热传递,造成圈闭环空内的流体温度升高,出现套管圈闭环空内压力升高的现象(APB)。为此构建了一套泡沫隔离液体系,配方为:水+氮气+1%悬浮剂S30S+0.8%起泡剂AOS+0.2%OP-10+0.4%稳泡剂VIS+40%超细铁矿粉,泡沫隔离液流变性良好,在不同温度下都具有良好的稳定性;在一定温度下泡沫具有很好的稳定性,能完全满足施工时氮气的保存率;泡沫隔离液相比于水,当温度上升到130℃时,压力下降95.1%,在20.0 MPa初始压力下,压力也能下降82.5%,具有良好的弹性,能够有效缓解环空压力。Due to the limitation of deep well structure and underwater wellhead system,with the formation fluid production,due to the heat transfer of the fluid,the fluid temperature in the closed loop is increased,and the phenomenon of the pressure in the closed loop of the casing ring is increased(APB).For this purpose,a foam isolation liquid system was constructed with the formula,water+nitrogen+1%suspension agent S30S+0.8%foaming agent AOS+0.2%OP-10+0.4%foam stabilizer VIS+40%ultrafine iron ore powder.The foam isolation liquid has good rheology and stability at different temperatures.At a certain temperature,the foam has good stability and can fully meet the retention rate of nitrogen during construction.Compared with water,when the temperature rises to 130℃,the pressure of foam isolated liquid decreases by 95.1%,and at the initial pressure of 20.0 MPa,the pressure can also decrease by 82.5%,which has good elasticity and can effectively relieve the annular pressure.

关 键 词：深水井 环空带压 泡沫隔离液 

分 类 号：TE254.4[石油与天然气工程—油气井工程]