本文關(guān)鍵詞：低濃度胍膠壓裂液體系的研究與應(yīng)用　出處：《油田化學(xué)》2017年01期 　論文類型：期刊論文

  更多相關(guān)文章： 低濃度壓裂液 胍膠 有機硼交聯(lián)劑 低殘渣 新疆油田

【摘要】：針對常規(guī)胍膠壓裂液體系增稠劑濃度偏高,造成壓裂成本較高、壓裂液殘渣含量高和對儲層傷害較大的問題,用硼砂、多元醇和醚類助溶劑等合成了較高分子量的多核硼交聯(lián)劑DY-1,研究了胍膠加量對壓裂液黏度的影響,考察了壓裂液的各項性能,并在新疆油田進行了現(xiàn)場應(yīng)用。結(jié)果表明,胍膠加量在低于0.165%、高于0.135%時能與DY-1形成聚合物交聯(lián)體。低濃度胍膠壓裂液耐溫耐剪切性較好,胍膠加量為0.18%~0.4%時,壓裂液在30~140℃、170 s~(-1)下剪切60 min的黏度均大于100 mPa·s;30~100℃下壓裂液的流動行為指數(shù)n(0.3~0.7)和稠度系數(shù)k(1.3~1.8)總體變化較為平緩,壓裂液性能穩(wěn)定;壓裂液靜態(tài)懸砂性能較好,在30~80℃下通過增加壓裂液pH值可使陶粒的沉降速率降至0.05 cm/min;壓裂液能有效控制濾失,造縫性能良好;在30~100℃下胍膠壓裂液在3~4 h均能徹底破膠,破膠液黏度小于5 mPa·s,破膠液殘渣含量低至76 mg/L�，F(xiàn)場施工成功率100%,壓裂液成本降低15.2%,增油效果明顯,滿足新疆油田儲層改造的要求。
[Abstract]:Borax is used to solve the problems of high concentration of conventional guanidine gel fracturing fluid thickener resulting in high fracturing cost high residue content of fracturing fluid and great damage to reservoir. Polyol and ether co-solvent were used to synthesize high molecular weight polynuclear boron crosslinking agent DY-1. The effect of guanidine content on viscosity of fracturing fluid was studied and the properties of fracturing fluid were investigated. The field application in Xinjiang Oilfield shows that the dosage of guanidine gel is less than 0.165%. When the content of guanidine gel is higher than 0.135, the polymer crosslinking agent can be formed with DY-1. The low concentration guanidine gel fracturing fluid has good temperature and shear resistance. When the dosage of guanidine gel is 0.18 ~ 0.4, the fracturing fluid is at 3040 鈩，

本文編號：1395670