CAJ | 학술논문

针对靖边南下古碳酸盐岩储层为白云石、方解石，充填程度较高，且与靖边气田相比，储层更致密，纵向上多层系特征明显，非均质性强．从提高酸液的有效作用距离、酸蚀裂缝导流能力角度出发，研发了新型清洁转向酸液体系．该体系以甜菜碱两性表面活性剂为主剂，依靠反应生成的盐类物质浓度自然调节酸液粘度，当酸液与地层内的烃类或大量水接触后，胶束结构转变为球状，残酸黏度迅速下降，有利于降低酸压后的返排阻力．该技术在G72‐13及G75‐13井获得了成功应用，平均无阻流量为23．54×104 m3／d ，对非均质储层的改造初见成效．
침대정변남하고탄산염암저층위백운석、방해석，충전정도교고，차여정변기전상비，저층경치밀，종향상다층계특정명현，비균질성강．종제고산액적유효작용거리、산식렬봉도류능력각도출발，연발료신형청길전향산액체계．해체계이첨채감량성표면활성제위주제，의고반응생성적염류물질농도자연조절산액점도，당산액여지층내적경류혹대량수접촉후，효속결구전변위구상，잔산점도신속하강，유리우강저산압후적반배조력．해기술재G72‐13급G75‐13정획득료성공응용，평균무조류량위23．54×104 m3／d ，대비균질저층적개조초견성효．
Jingbian south ancient carbonate reservoir of dolomite ,calcite have higher filling de‐gree .The reservoir are more dense ,multilayer characteristics and strong heterogeneity on longitudinal compared with JingBian gas field .To improve the effective distance of acid and acid corrosion fracture flow conductivity ,a new clean diverting acid was developed .This sys‐tem based on amphoteric surfactant as main agent ,rely on the reaction concentration of visco‐elastic surfactant with saline matter to adjust acid viscosity .when the acid contact with hy‐drocarbon or water ,micellar structures change to a ball ,the residual acid viscosity decreased rapidly ,which is beneficial to reduce the flowback resistance after acid fracturing .The tech‐nology has been successfully applied in the G72‐13 and G75‐13 well ,the average absolute open flow is 23 .54 × 104 m3/d ,it has good effect on the transformation of heterogeneous res‐ervoirs .