CAJ | 학술논문

应用三轴岩石强度测试仪RTR-1000实验研究现有钻井液及改进钻井液体系对阜宁组泥页岩力学性质和强度特性的影响，并计算比较其对坍塌压力的影响，优选出能够降低地层坍塌压力的钻井液体系。实验所用岩心为苏北阜宁组露头岩心，实验结果表明：在钻井液中加入聚合醇或聚醚多元醇产品，利用其浊点效应对地层进行封堵，改进后的钻井液体系能够提高地层岩石的强度，降低地层坍塌压力（当量钻井液密度）0.19～0.30 g/cm3，扩大了安全钻井液密度范围。
응용삼축암석강도측시의RTR-1000실험연구현유찬정액급개진찬정액체계대부저조니혈암역학성질화강도특성적영향，병계산비교기대담탑압력적영향，우선출능구강저지층담탑압력적찬정액체계。실험소용암심위소북부저조로두암심，실험결과표명：재찬정액중가입취합순혹취미다원순산품，이용기탁점효응대지층진행봉도，개진후적찬정액체계능구제고지층암석적강도，강저지층담탑압력（당량찬정액밀도）0.19～0.30 g/cm3，확대료안전찬정액밀도범위。
In order to optimize a drilling fluid formula,which can decrease the collapse pressure of shale formation,the triaxial rock strength test device,RTR-1000,was operated to study the effect of current and polyether polyol type drilling fluid on mechanic property,strength behavior and collapse pressure.The experimental outcrop cores were taken from Fu-ning Formation in Jiangsu Oilfield.Experimental results show that when polyalcohol polyol or polyether product was added in drilling fluid,the improved drilling fluid which can plug the formation by its turbidity point effect,can increase the rock strength and reduce the collapse pressure,namely equivalent drilling fluid density,by 0 .19-0.30 g/cm3 .As a result,the improved fluid can expand the range of safety drilling fluid density.