CAJ | 학술논문

酸蚀裂缝导流能力是影响酸压效果和评价酸液性能的重要指标.根据API行业标准,利用酸蚀裂缝导流装置室内开展了地面交联酸及其闭合酸化后裂缝导流能力的测试.结果表明,闭合压力40 MPa时地面交联酸的酸蚀裂缝导流能力为150μm2·cm,55 MPa时依然在80μm2·cm以上;地面交联酸酸压后经过闭合酸化,40 MPa下酸蚀裂缝导流能力为269μm2·cm,较未闭合酸化前提高了1.7倍;酸岩反应后的溶蚀形态好,沟槽明显,深度多在0.5~4.5 mm,可承载高闭合压力和提高长期导流能力;同时,其导流能力值远高于5级普通酸和5级稠化酸,显示出更为优良的液体性能.
산식렬봉도류능력시영향산압효과화평개산액성능적중요지표.근거API행업표준,이용산식렬봉도류장치실내개전료지면교련산급기폐합산화후렬봉도류능력적측시.결과표명,폐합압력40 MPa시지면교련산적산식렬봉도류능력위150μm2·cm,55 MPa시의연재80μm2·cm이상;지면교련산산압후경과폐합산화,40 MPa하산식렬봉도류능력위269μm2·cm,교미폐합산화전제고료1.7배;산암반응후적용식형태호,구조명현,심도다재0.5~4.5 mm,가승재고폐합압력화제고장기도류능력;동시,기도류능력치원고우5급보통산화5급주화산,현시출경위우량적액체성능.
@@@@Acid?etching?fracture?conductivity?is?an?important?indicator?of?affecting?acid?fracturing?effect?and?evaluating?acid?fluid?performance. According to the API industry standard, fracturing conductivity of surface cross-linked acid and closed acidization labora-tory experiments were carried out using etching fracture conductivity device. The results show that the fracture conductivity of surface cross-linked acid was 150μm2.cm under 40 MPa closing pressure, and still higher than 80μm2.cm when closing pressure up to 55 MPa;Surface cross-linked acid fracturing after closed acidization, acid etching fracture conductivity was up to 269μm2.cm under 40 MPa closing?pressure?which?increased?1.7?times?compared?to?before?closure?acid.?The?corrosion?morphology?appears?fine?after?acid-rock?reaction and have obvious groove with depth of more than 0.5-4.5 mm, which could bear high closure pressure and improve long-term conductivity. Meanwhile, the conductivity is better than 5-stage common acid and 5-stage gelled acid, showing much more better liquid properties.