【摘要】：為提高江漢油田高鹽中低滲油藏注水開發(fā)后期的原油采收率,用起泡劑和穩(wěn)泡劑配制了泡沫體系,通過考察起泡劑類型、濃度及穩(wěn)泡劑濃度對(duì)泡沫體系發(fā)泡體積和半衰期的影響優(yōu)選了泡沫體系配方,研究了泡沫體系的耐油性、耐鹽性及耐老化性,對(duì)泡沫驅(qū)注入?yún)?shù)進(jìn)行了優(yōu)化,通過對(duì)并聯(lián)巖心的驅(qū)油實(shí)驗(yàn)考察了泡沫體系的封堵能力。研究結(jié)果表明,起泡劑和穩(wěn)泡劑質(zhì)量分?jǐn)?shù)均為0.4%時(shí),泡沫體系的發(fā)泡能力良好,發(fā)泡體積為110 mL,半衰期為427 min,泡沫體系與原油的界面張力較低(10~(-2)mN/m數(shù)量級(jí));泡沫體系耐油性較好,在含油量為30%時(shí)的半衰期為40 min;耐鹽性良好,在礦化度為300 g/L或鈣鎂離子為5 g/L時(shí)的半衰期大于350 min;耐老化性良好,在70℃下老化100 d的發(fā)泡體積和半衰期變化較小;低界面起泡劑氮?dú)怛?qū)最佳注入?yún)?shù)為:氣液比1.5∶1、注入段塞0.4 PV、注入速度1.2 mL/min,在此條件下泡沫體系可提高單管巖心采收率7.51%、并聯(lián)巖心采收率10.04%,對(duì)王場油田高鹽非均質(zhì)油層具有良好的調(diào)驅(qū)效果。
[Abstract]:In order to improve the oil recovery of high salt low permeability reservoir in Jianghan Oilfield, foam system was prepared with foaming agent and foam stabilizer, and the type of foaming agent was investigated. Effects of concentration and concentration of foam stabilizer on foaming volume and half-life of foam system, the formulation of foam system was selected, the oil resistance, salt resistance and aging resistance of foam system were studied, and the injection parameters of foam flooding were optimized. The plugging ability of foam system was investigated by oil displacement experiments of parallel cores. The results show that the foaming ability of foam system is good when the mass fraction of foaming agent and stabilizer is 0.4, the foaming volume is 110mL, the half-life is 427min, the interfacial tension between foam system and crude oil is lower (10 ~ (-2) mN/m order of magnitude), and the oil resistance of foam system is better. When the oil content is 30, the half-life is 40 min, the salt tolerance is good, the half-life is more than 350 min when the salinity is 300 g / L or the Ca / mg ~ (2 +) is 5 g / L, and the aging resistance is good, the foaming volume and half-life of 100 d aging at 70 鈩，

本文編號(hào)：2162478