CAJ | 학술논문

针对磷酸酯/Al3+交联的油基压裂液交联速度慢,交联剂溶解性慢、稳定性差和价格高等缺点,首次对磷酸酯/Fe3+交联的油基压裂液体系进行了研究.通过对铁交联剂体系的优化,筛选一种磷酸酯/Fe3+交联的新型交联剂体系,并对磷酸酯/Fe3+油基冻胶压裂液性能进行了评价.结果表明:采用30%Fe2(SO4)3+15%二乙醇胺+55%水制备的新型交联剂体系,直接与磷酸酯混合即可形成油基冻胶,其性能不受放置时间的影响,交联速度快,成胶性能好,10 min就可达到最大黏度;压裂液的抗温抗剪切性能高,与常规铝交联剂体系比较,压裂液成胶速度提高了20倍,压裂液的抗温能力由原来100℃提高到135℃,并且压裂液的破胶性和滤失性等性能均能达到压裂施工的要求.
침대린산지/Al3+교련적유기압렬액교련속도만,교련제용해성만、은정성차화개격고등결점,수차대린산지/Fe3+교련적유기압렬액체계진행료연구.통과대철교련제체계적우화,사선일충린산지/Fe3+교련적신형교련제체계,병대린산지/Fe3+유기동효압렬액성능진행료평개.결과표명:채용30%Fe2(SO4)3+15%이을순알+55%수제비적신형교련제체계,직접여린산지혼합즉가형성유기동효,기성능불수방치시간적영향,교련속도쾌,성효성능호,10 min취가체도최대점도;압렬액적항온항전절성능고,여상규려교련제체계비교,압렬액성효속도제고료20배,압렬액적항온능력유원래100℃제고도135℃,병차압렬액적파효성화려실성등성능균능체도압렬시공적요구.
Hydrocarbon gels are used in the low penetrate,low pressure and the water-sensitive formation fracturing. We make a study on a kind of new phosphate ester and ferric iron to hand over the oil-based fracturing liquid to fasten in this paper. By optimizing iron crosslinking agent,We choose a new crosslinking agent reacted with phosphate diester,and evaluate the perfor-mance of phosphate diester/Fe3+oil-based gelled fracturing fluid. The results display the new crosslink system(30%Fe2(SO4)3+15%Diethanolamine+55%H2O)functions stabily,and it crosslinks quickly with gels,with good gum function. The new frac-turing fluid functions well in temperature resistance and shear resistance. Compared with conventional aluminum crosslinker, the new fracturing fluid is 20 times faster in gelation,and is able to resist a temperature of 135℃. Both the breaking and lossing of the new fracturing fluid meet the requirement of fracturing.