本文以滤失量为指标,用正交设计试验方法确定了合成高粘度改性淀粉XP-1的最佳合成条件。试验结果显示,在最佳条件下合成的高粘度改性淀粉当在淡水泥浆中的加量为3g/L时,就可使泥浆的滤失水降低到7mL以下,表观粘度达到15mPa·s以上。XP-1能够更好地提高切力及动塑比值,配成的钻井液携带和悬浮性能与其他改性淀粉相比较均较好,具有较强地工程应用前景。 In this paper, the best synthetic conditions for the synthesis of high viscosity modified starch XP-1 were determined by orthogonal design test. The results showed that the best viscosity of the modified starch synthesized under the optimum conditions when the amount of freshwater slurry in the slurry is 3g / L, the filtrate can be reduced to less than 7mL mud, the apparent viscosity of 15mPa · s the above. XP-1 can better improve the shear and plastic-to-plastic ratio. The drilling fluid carried by the XP-1 is better than other modified starch in carrying and suspending properties and has strong engineering application prospect.