中国石油大学学报(自然科学版)
中國石油大學學報(自然科學版)
중국석유대학학보(자연과학판)
JOURNAL OF CHINA UNIVERSITY OF PETROLEUM(EDITION OF NATURAL SCIENCE)
2009年
6期
136-141
,共6页
马代鑫%徐赋海%王增林%隋春艳%李力行%王维波
馬代鑫%徐賦海%王增林%隋春豔%李力行%王維波
마대흠%서부해%왕증림%수춘염%리역행%왕유파
甜菜碱%变黏分流酸%流变性%变黏机制%岩心流动
甜菜堿%變黏分流痠%流變性%變黏機製%巖心流動
첨채감%변점분류산%류변성%변점궤제%암심류동
betaine%variable viscosity diverting acid%rheological property%viscosity variation mechanism%core flow
根据黏弹性表面活性剂(VES)理论,研制一种性能优良的甜菜碱类变黏分流酸,分析其胶束结构特点和变黏性能,考察剪切速率对油酸酰胺丙基甜菜碱质量分数、pH值和不同温度下变黏分流酸流变性的影响,探讨pH值对胶束结构的影响,得出变黏分流酸的变黏机制.结果表明:油酸酰胺丙基甜菜碱在10 %HCl中为球型胶束,在5% HCl中为球型棒型过渡类型和棒状胶束,在2% HCl中为蠕虫状胶束;变黏分流酸随着酸液质量分数降低表观黏度逐渐增加,当油酸酰胺丙基甜菜碱质量分数大于临界胶束浓度(w_cmc)时,变黏分流酸增黏后具有剪切稀释的黏弹流体特点;变黏分流酸在酸化过程中压力有先上升后下降的趋势,发生液流转向进入中低渗层,对储层无伤害.
根據黏彈性錶麵活性劑(VES)理論,研製一種性能優良的甜菜堿類變黏分流痠,分析其膠束結構特點和變黏性能,攷察剪切速率對油痠酰胺丙基甜菜堿質量分數、pH值和不同溫度下變黏分流痠流變性的影響,探討pH值對膠束結構的影響,得齣變黏分流痠的變黏機製.結果錶明:油痠酰胺丙基甜菜堿在10 %HCl中為毬型膠束,在5% HCl中為毬型棒型過渡類型和棒狀膠束,在2% HCl中為蠕蟲狀膠束;變黏分流痠隨著痠液質量分數降低錶觀黏度逐漸增加,噹油痠酰胺丙基甜菜堿質量分數大于臨界膠束濃度(w_cmc)時,變黏分流痠增黏後具有剪切稀釋的黏彈流體特點;變黏分流痠在痠化過程中壓力有先上升後下降的趨勢,髮生液流轉嚮進入中低滲層,對儲層無傷害.
근거점탄성표면활성제(VES)이론,연제일충성능우량적첨채감류변점분류산,분석기효속결구특점화변점성능,고찰전절속솔대유산선알병기첨채감질량분수、pH치화불동온도하변점분류산류변성적영향,탐토pH치대효속결구적영향,득출변점분류산적변점궤제.결과표명:유산선알병기첨채감재10 %HCl중위구형효속,재5% HCl중위구형봉형과도류형화봉상효속,재2% HCl중위연충상효속;변점분류산수착산액질량분수강저표관점도축점증가,당유산선알병기첨채감질량분수대우림계효속농도(w_cmc)시,변점분류산증점후구유전절희석적점탄류체특점;변점분류산재산화과정중압력유선상승후하강적추세,발생액류전향진입중저삼층,대저층무상해.
Based on visco elastic surfactant theory, a new variable viscosity diverting acid (VVDC) with good performance was developed, and its micelle structure characteristics and viscosity variation property were analyzed. The influence of shear rate on the concentration of oleic amide propyl betaine, pH and rheological property of VVDC for different temperature was studied. The influence of the pH on micelle structure was discussed, and the viscosity variation mechanism of VVDC was obtained. The results show that the micelle structures of VVDC in the HCl of 10%, 5%, 2% (mass fraction) are globular, rod and the transitional form between globular and rod, and wormlike respectively. The apparent viscosity of VVDC increases with the acid concentration decreasing, and it has the dilution shearing feature when the oleic amide propyl betaine concentration is higher than the critical micelle concentration. During the acidizing process, the pressure of VVDC is reduced after increasing. And the flow of acid turned into the low-medium permeability reservoir, which does no harm to the reservoir.