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大庆喇、萨、杏油田，由于长期注水开发，造成局部注采不平衡，地层压力发生了很大变化，形成在1口井中同时存在高压层和欠压层的复杂地质条件，在钻井和固井过程中极易发生井漏。调整井防漏水泥浆技术，从减阻入手，利用外加剂改善水泥浆的流变性能和封固性能。室内做了5个方面的试验：1．常规物理性能；2．流变性能；3．膨胀及界面强度；4.自由水；5.抗水窜性能。试验表明：DFL外加剂水泥浆各项指标优于未加外加剂的水泥浆。并得出：1．DFL低摩阻防漏水泥浆具有良好的流变性能，临界排量低，容易实现低速紊流顶管，在同等条件下，摩阻比原浆低74％，现场替浆泵压降低1MPa。2．DFL低摩阻防漏水泥浆体系稳定，无自由水析出。3．抗压强度与界面强度比原浆都有所提高，并有一定的膨胀和抗窜性能。4．外加剂加量少，且全部采用湿混形式，易在现场应用。
Daqing La, Sa and Xing oilfields, due to the imbalance of partial injection and production due to long-term water injection development, the formation pressure has undergone great changes, forming complex geological conditions that exist in both high pressure and under-pressure layers in one well. Lost prone process wells. Adjust the well to prevent leakage of cement slurry technology, start from the drag reduction, the use of additives to improve the rheological properties of cement slurry and sealing performance. Interior made five aspects of the test: 1. Conventional physical properties; 2. Rheological properties; 3. Expansion and interface strength; 4 free water; 5 anti-water channeling performance. The experiment shows that the indexes of DFL admixture grout are better than the grout without admixture. And draw: 1. DFL low friction anti-leakage grout has good rheological properties, low critical discharge, easy to achieve low-speed turbulence pipe jacking, under the same conditions, the friction resistance is 74% lower than that of the puree, the scene for the pump pressure is reduced by 1MPa. 2. DFL low-friction leak-proof slurry system stability, no free water precipitation. 3. Compressive strength and interface strength than puree have increased, and a certain degree of expansion and anti-channeling performance. 4. Add less additive, and all wet mixing form, easy to apply in the field.