【摘要】：壓裂液是難動用儲量壓裂技術的重要內(nèi)容和關鍵環(huán)節(jié)之一。壓裂液及其性能是影響壓裂成敗和施工成本的諸多因素中最重要的因素。壓裂液類型及其性能對是否形成一條足夠尺寸的、有足夠?qū)Я髂芰Φ牧芽p和減少對儲層的傷害、最大程度改善增產(chǎn)效果是密切相關的。難動用儲量的壓裂液技術是壓裂液分子理論、壓裂液添加劑與配方體系和壓裂液工程應用技術的組合技術。由于常規(guī)植物膠和高分子聚合物系列壓裂液存在水不溶物、殘渣含量高,對低滲透油田儲層傷害嚴重等缺陷,不能滿足油氣田開發(fā)的需要。植物胍膠經(jīng)過羥丙基化后能大幅度降低水不溶物和在一定程度上提高耐溫性能,但破膠液的殘渣含量較高,特別是100℃以上高溫油氣井,為了保證壓裂液的耐溫耐剪切性能,不得不提高稠化劑的濃度,進而增加了破膠液的殘渣含量,對油氣層的傷害不容忽視。本項目結(jié)合吉林油田多年的壓裂技術和經(jīng)驗,通過大量室內(nèi)試驗與現(xiàn)場實驗的摸索,形成了一套以降低壓裂液對儲層的傷害,提高壓裂的適應性和有效性為目的的低濃度低傷害高溫壓裂液體系,該體系既保證了壓裂液的粘彈性又大幅度降低了稠化劑使用濃度和壓裂液破膠液殘渣對儲層巖石的傷害,在吉林油田得到了廣泛應用,取得了很好的經(jīng)濟效益。
[Abstract]:Fracturing fluid is one of the important contents and key links of hard-to-use reserves fracturing technology. Fracturing fluid and its performance are the most important factors affecting the success or failure of fracturing and operation cost. The type of fracturing fluid and its properties are closely related to the formation of a fracture with enough size and enough conductivity to reduce the damage to the reservoir and to improve the effect of increasing production to the greatest extent. The fracturing fluid technology with hard to produce reserves is a combination technology of fracturing fluid molecular theory, fracturing fluid additive and formula system and fracturing fluid engineering application technology. Because the conventional fracturing fluid of plant gum and polymer series has some defects such as water insoluble substance, high residue content, serious damage to reservoir in low permeability oil field, etc., it can not meet the needs of oil and gas field development. After hydroxypropylation, guanidine gum can greatly reduce the water insoluble matter and improve the temperature resistance to a certain extent, but the residue content of the gel breaking fluid is high, especially in the high temperature oil and gas wells above 100 鈩，

本文編號：2419622