CAJ | 학술논문

辽河油田原油性质属稠油，富含沥青质和胶质，具有原油流动性差、脱水难度大、脱水效率低的特点。为提高原油采收率，增产增效，开展驱油剂、蒸汽吞吐剂、高温调剖剂的应用，导致采出液成分复杂，加剧了原油乳化。为解决联合站在运行过程中出现的脱水困难的问题，采用现场调研与室内热化学脱水实验相结合的方法，分析了多个因素（包括来液含水率、脱水温度、原油溶液 pH 值、破乳剂加药浓度、采出液成分等）对各区来液混合物油水分离的影响。研究表明：适当提高脱水温度（冬季开加热炉时保持一次沉降罐60～70℃、二次沉降罐85～90℃）、降低 pH 值至6～7.5、延长罐内沉降时间、控制破乳剂加药浓度在600×10-6至750×10-6内等都是提高联合站原油脱水效果的有效措施。
료하유전원유성질속주유，부함력청질화효질，구유원유류동성차、탈수난도대、탈수효솔저적특점。위제고원유채수솔，증산증효，개전구유제、증기탄토제、고온조부제적응용，도치채출액성분복잡，가극료원유유화。위해결연합참재운행과정중출현적탈수곤난적문제，채용현장조연여실내열화학탈수실험상결합적방법，분석료다개인소（포괄래액함수솔、탈수온도、원유용액 pH 치、파유제가약농도、채출액성분등）대각구래액혼합물유수분리적영향。연구표명：괄당제고탈수온도（동계개가열로시보지일차침강관60～70℃、이차침강관85～90℃）、강저 pH 치지6～7.5、연장관내침강시간、공제파유제가약농도재600×10-6지750×10-6내등도시제고연합참원유탈수효과적유효조시。
The heavy oil from Liaohe oilfield is rich in asphaltenes and colloids, has characteristics of poor mobility, and low dehydration efficiency. In order to improve oil recovery and increase efficiency, oil displacement agents, steam stimulation, and high-temperature profile control agents have been widely applied, which makes produced fluid composition more complicated, and exacerbates the oil emulsion. To solve the problem that the dehydration of crude oil is difficult in multi-purpose station during operation, by the method combining the field research with indoor dehydration experiments of thermal chemistry, influencing factors of separation of oil and water were analyzed, including liquid content, dehydration temperature, pH value of crude oil solution, demulsifier dosing concentration, produced fluid composition. The results show that increasing dehydration temperature, decreasing pH value at 6 to 7.5, extending the processing time of crude oil in sedimentation tanks, maintaining demulsifier dosing concentration at 600 ×10-6 to 750×10-6 ,are effective measures to improve crude oil dehydration effect in the multi-purpose station.