南海X井射流泵排液井筒凝固风险分析  

Analysis of wellbore solidification risk in X well of South China Sea

作　　者：张冬雪 Zhang Dongxue(CNOOC Energy Development Co.,Ltd.Engineering Technology Shenzhen Branch,Shenzhen 518067)

机构地区：[1]中海油能源发展股份有限公司工程技术深圳分公司,广东深圳518067

出　　处：《石化技术》2024年第7期287-289,共3页Petrochemical Industry Technology

摘　　要：对于高含蜡油井,射流泵在排液过程中,动力液的温度、排液速度及含水率直接影响井筒蜡沉积~([1]),利用软件建立井筒多相流动的数学模型,通过三种蜡沉积模型对井筒内的蜡沉积及凝固情况进行数值模拟。分析不同动力液注入量下油管入口温度,模拟瞬态、稳态排液工况,井流物凝固风险的敏感性,预测出X井在射流泵以上约1070m管段与采油树位置有蜡沉积风险。蜡沉积总质量与总体积分别约为1.6kg与1850cm~3,蜡沉积最厚位置在采油树且厚度约为0.6mm。为后续井筒排液过程中采取有效措施进行抑制井筒结蜡、除蜡、防止凝固,提供了重要依据。For Wells with high wax content,in the process offluid discharge by jet pump,the temperature,velocity offluid discharge and moisture content of the dynamicfluid directly affect the wax deposition in the wellbore[1].The mathematical model of multi-phaseflow in the wellbore is established by software,and the wax deposition and solidification in the wellbore are numerically simulated by three kinds of wax deposition models.By analyzing the inlet temperature of tubing under different injection amounts of dynamicfluid,simulating the transient and steady discharge conditions,and the sensitivity of the wellfluid solidification risk,it is predicted that there is a risk of wax deposition in the 1070m pipe section above the jet pump and the location of the tree in well X.The total weight and volume of wax deposition are about 1.6kg and 1850cm3,respectively,and the thickness of wax deposition is about 0.6mm in the tree.It provides an important basis for taking effective measures to restrain wellbore wax formation,remove wax and prevent solidification in the follow-up process of wellbore drainage.

关 键 词：凝固 蜡沉积 结蜡 

分 类 号：TE5[石油与天然气工程—油气田开发工程]