【摘要】：實(shí)驗(yàn)室進(jìn)行了4種不同酸溶液的破膠實(shí)驗(yàn),應(yīng)用旋轉(zhuǎn)黏度計(jì)、馬爾文激光粒度儀、離心機(jī)、分光光度計(jì)等多手段測(cè)定了破膠液的黏度、殘?jiān)椒植�、殘�(jiān)考盀V液中的含糖量,優(yōu)選出了適用于低溫煤儲(chǔ)層的破膠劑。實(shí)驗(yàn)測(cè)試評(píng)價(jià)了該破膠液對(duì)煤儲(chǔ)層的傷害性。結(jié)果表明:溫度20℃時(shí)HXM+NH_4Cl復(fù)合酸破膠效果好,濃度越大破膠速度越快。使用濃度0.10%HXM+0.05%NH_4Cl的酸液進(jìn)行破膠,2 h內(nèi)壓裂液黏度可降到5 m Pa·s以下,破膠液殘?jiān)兄盗綖?6μm,殘?jiān)?0 mg/L。原始滲透率小于0.87×10~(-15)m~2時(shí),煤芯滲透率的傷害率小于20%;煤儲(chǔ)層的原始滲透率越大,破膠液對(duì)巖芯的傷害率越大。該復(fù)合酸破膠劑與常規(guī)氧化破膠劑相比,具有低溫下破膠徹底、殘?jiān)可�、傷害輕等優(yōu)點(diǎn)。
[Abstract]:The experiments of gel breaking of four different acid solutions were carried out in the laboratory. The viscosity and particle size distribution of the gel breaking solution were measured by rotating viscometer, Ma Erwen laser particle size meter, centrifuge, spectrophotometer, etc. The residue content and sugar content in filtrate are selected to be suitable for low temperature coal reservoir. The damage of the gel breaking liquid to coal reservoir was evaluated by experiment. The results showed that the HXM NH_4Cl compound acid had good gel breaking effect at 20 鈩，

本文編號(hào)：2350149