The pressure profile adjustment reduces the high-pressured lamination strength, maintains the low-pressure lamination strength, realizes reduces to the oil layer pollution, reduces the drilling cost based on the existing oil-field development plan. 压力剖面调整是在现有的油田开发方案基础上,降低高压层压力,保持低压层压力,实现减轻对油层污染、降低钻井成本。