CAJ | 학술논문

致密砂岩油藏具有渗透率低、吼道细小、填隙物含量高等特点，因此要求压裂液必须具有低伤害，较高的返排能力和防膨能力的特点。为此，制备得到了低分子量，低粘（基液粘度小于10 mPa · s），压后能够有效破胶、易返排的多羟基醇压裂液体系。通过对该体系的流变性能、残渣含量、静态滤失特性、表面张力、破胶液防膨性能及对岩心伤害等进行室内实验评价，证明该压裂液抗剪切能力较强、破胶水化彻底、无残渣、滤失低、表界面张力低、能防止黏土膨胀、对地层损害小。现场10口井的现场试验表明，应用多羟基醇压裂液，平均返排率80％，平均单井试排产量增加6 m3/d ，实施效果显著。
치밀사암유장구유삼투솔저、후도세소、전극물함량고등특점，인차요구압렬액필수구유저상해，교고적반배능력화방팽능력적특점。위차，제비득도료저분자량，저점（기액점도소우10 mPa · s），압후능구유효파효、역반배적다간기순압렬액체계。통과대해체계적류변성능、잔사함량、정태려실특성、표면장력、파효액방팽성능급대암심상해등진행실내실험평개，증명해압렬액항전절능력교강、파효수화철저、무잔사、려실저、표계면장력저、능방지점토팽창、대지층손해소。현장10구정적현장시험표명，응용다간기순압렬액，평균반배솔80％，평균단정시배산량증가6 m3/d ，실시효과현저。
Tight oil reservoir has the characteristics of low permeability , small throat and high filler content ,therefore the fracturing fluid must have properties of low damage ,strong ability of backflow and anti-swelling .The polyhydroxy-alcohol fracturing fluid system with low molecular weight ,low viscosity (base fluid viscosity is less than 10) ,gel breaking effec-tively and easy backflow was prepared .Rheological properties ,the content of residue ,the static filtration characteristics ,surface tension ,gel breaking liquid anti-swelling properties and core damage have been tested in lab .Results of lab testing show that the shear perform-ance is stronger ,fracturing fluid can be fully breaking without residue ,and fracturing fluid has low filtration rate ,low surface tension ,better anti-swelling property and low formation damage .Ten well tests received significant effect ,which the average backflow rate is 80%and average oil increment is 6 m3/d .