摘要
根据海上蒸汽吞吐热采井产出液特征,采用高速分散机配制油包水乳状液,考察了含水率对乳状液黏度的影响、原油与乳状液的渗流规律、乳状液的微观特性以及乳状液的相态和岩心动态防乳化性能。研究结果表明,随着含水率的升高,乳状液的黏度大幅升高,油水质量比为5∶5时乳状液的黏度是原油黏度的5.74倍。相同渗流速度下,乳状液在渗透率为1002×10^-3μm^2的低渗管岩心中的压力梯度明显高于原油的压力梯度;在渗透率为3000×10^-3μm^2的高渗管中,相同渗流速度下乳状液与原油的压力梯度差距不明显。乳状液提高了蒸汽最高注入压力达3.15 MPa。乳状液中加入防乳破乳剂溶液后,水珠的数量大幅减少,防乳破乳剂在岩心中具有破乳与降低蒸汽注入压力的双重作用。
Water-in-oil emulsion was prepared using high speed dispenser based on the characteristics of the produced fluid from offshore steam huff and puff thermal production wells,and the effect of moisture percentage on the viscosity of emulsion,the permeability rule of crude oil and emulsion,the microcosmic properties of emulsion,the phase state of emulsion,and the dynamic anti-emulsifying property of core.The results of research have shown that the viscosity of emulsion increases substantially as the moisture percentage increases and that viscosity of viscosity is 5.74 times of that of crude oil when the mass ratio of oil to water is 5:5.The pressure gradient of emulsion in low permeability pipe core of the permeability of 1002×10-3μm2 is significantly higher than that of crude oil in the same low permeability pipe core at the same seepage velocity,and the pressure gradient of emulsion and that of crude oil differ slightly in high permeability pipe of the permeability of 3000×10-3μm2 at the same seepage velocity.The maximum steam injection pressure was increased by 3.15 MPa due to emulsion.The number of water globules dropped substantially after an anti-emulsion and emulsion breaking agent solution that can break emulsion and reduce steam injection pressure meanwhile was added to the emulsion.
作者
刘昊
王秋霞
张华
王弘宇
汪成
LIU Hao;WANG Qiuxia;ZHANG Hua;WANG Hongyu;WANG Cheng(CNOOC(China)Co.,Ltd.,Tianjin Company,Tianjin 300459;China Oilfield Services Limited,Tianjin Company,Tianjin 300459)
出处
《精细石油化工进展》
CAS
2020年第2期1-5,共5页
Advances in Fine Petrochemicals
基金
“十三五”国家重大专项“渤海油田高效采油工程及配套技术示范”子课题(2016ZX05058)部分研究成果。
关键词
热采井产出液
乳状液
渗流规律
防乳破乳剂
表观黏度
produced fluid from thermal production well
emulsion
permeability rule
anti-emulsion and emulsion breaking agent
apparent viscosity
