With the oilfield development, the oil-increasing effect by fracturing is worse gradually, the ratio of useless Wells is increasing.
随着油田开发时间的延长，葡萄花油田压裂增油效果逐渐变差，低效井比例增多。
It is important for us to find new targets of the exploration of oil-gas in Ordos Basin, with the oilfield development in Mesozoic stratum for a long time.
鄂尔多斯盆地中生界油气勘探开发历史较长，目前主要面临着寻找新的有利勘探区块和层位的任务。
With continuing an oilfield development, its formation pressure tends to decline along with the horizontal fractures being closed, the permeability drawdown and the productivity being damaged.
随着油田开发的进行，地层压力逐渐下降，水平裂缝趋于闭合，渗透率大幅下降，严重影响了生产能力。
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