胜利油田单六块超稠油乳化降粘室内实验研究  

A Laboratory Study on Viscosity Reduction by Emulsification for Super-Heavy Crude Oil of Faulted Block Reservoir Shan-6 in Shengli

作　　者：曹均合[1] 孙克己[2] 麻金海[2] 郭省学[2] 盖平原[2] 王秋霞[2] 唐培忠[2] 

机构地区：[1]中国石化胜利石油管理局科技处,山东东营257026 [2]中国石化胜利油田采油工艺研究院,山东东营257000

出　　处：《油田化学》2003年第2期103-105,108,共4页Oilfield Chemistry

摘　　要：在实验室评价了质量比7/3的阴离子/非离子混合表面活性剂降粘剂SB 3(有效物含量≥30%)对胜利滨南油田单6断块蒸汽吞吐井超稠油井筒乳化降粘的性能。所用油样为脱气脱水单6 12 X42井原油,在10s-1下50℃粘度为6.4×104mPa·s,60℃粘度为3.3×104mPa·s;水相为模拟地层水,含NaCl1.5×104mg/L,Ca2+800mg/L,Mg2+200mg/L及设定量SB 3。实验研究结果表明:体积比为90/10～50/50的原油和水在60℃时形成油包水乳状液,其粘度较原油大幅上升;在水相中加入2.0×104mg/LSB 3后,相同体积比的原油和水在60℃时形成水包油乳状液,60℃、50s-1下乳状液粘度为260mPa·s(油水体积比70/30)和～130mPa·s(60/40);温度由35℃升到80℃时,油水体积比70/30的乳状液的粘度(50s-1)由579mPa·s降至65mPa·s;SB 3加量增大时(≤5.0×104mg/L)乳状粘度还会降低;SB 3不影响稠油乳状液的化学破乳脱水。因此,SB 3可用于胜利滨南油田单6断块超稠油的井筒乳化降粘。图3表4参3。An anionic/nonionic mixed surfactant (mass ratio 7/3) in ≥30% aqueous solution, denoted as SB3, is evaluated in Laboratory for improving flowability of superheavy crude in tubing of steam huffpuff wells of faulted block reservoir Shan6 of Binnan, Shengli. The degased and dehydrated crude taken from well Shan612X42 as crude sample has viscosity 64 Pa·s at 50℃ and 33 Pa·s at 60° (10 s-1). The aqueous phase used is a simulation formation water (SFW) containing 15 g/L NaCl, 0.8 g/L Ca2+, and 0.2 g/L Mg2+ and a given quantity of SB3. It is shown that the crude and SFW in volume ratios 90/10—50/50 form at 60℃ W/O emulsions with significantly enhanced viscosity; with the help of SB3 of dosage 20 g/L in SFW, O/W emulsions are created in the same volume ratio range at 60℃ and 50 s-1 with viscosity of 0.6 Pa·s (O/W ratio 70/30) and ～0.13 Pa·s (60/40); the viscosty of O/W (70/30) emulsions decreases from 0.579 to 0.065 Pa·s when temperature raises from 35℃ to 80℃ (50 s-1);increasing SB3 dosage up to 50 g/L in SFW further decreases the viscosity of O/W emulsions; SB3 exerts no negative influence on chemical demulsification/dehydration of the crude emulsions. It is concluded that SB3 can be used as emulsifier/viscosityreducer for downhole emulsification of superheavy crude in faulted block reservoir Shan6 in Binnan, Shengli.

关 键 词：胜利油田单六块 超稠油 乳化降粘 室内实验 阴离子/非离子混合表面活性剂 

分 类 号：TE39[石油与天然气工程—油气田开发工程]