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通过室内实验研究,明确储层特征及敏感性情况,系统分析了储层损害机理,并结合超前注水,研究制定出“先期防膨、早期分注”与“控制注水强度、保持注采平衡”对策措施,形成了先期分层、梯度式防膨与后期注水过程中段塞脉冲式防膨相结合的工艺技术,确定了合理的注入压力和注入量等参数。投入现场实施后效果显著,百71井区白碱滩组油藏注入压力保持稳定,吸水状况良好,动用程度良好。
Through laboratory experiments, the reservoir characteristics and sensitivity were clarified, and the mechanism of reservoir damage was analyzed systematically. Combined with advanced water injection, a study was made on the control of waterflooding strength by “early swelling prevention, early distribution” and “control” Mining balance "measures to form a pre-stratified, gradient-type anti-swelling and water injection in the latter part of the plug pulse-type anti-swelling combined process technology, to determine a reasonable injection pressure and injection parameters. After the project was put into operation, the effect was remarkable. The injection pressure of Baijiatan Formation in Ba 71 well area remained stable, the water absorption was good and the degree of utilization was good.