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低渗透油田主要的增产措施是压裂改造,常规压裂工艺只能重复改造老裂缝,随生产开发时间的增加,老裂缝周围剩余油逐年变少,重复压裂经济有效率逐年降低。利用污水杂质含量较高、粘度低、污染小特点,与常规压裂工艺组合,使近井蓄能,改变局部应力场,实现造新缝、造多裂缝,从而增加新的泄油通道,提高压裂单井增产效果。
The main stimulation measures in low permeability oilfields are fracturing. The conventional fracturing process can only rebuild old fractures repeatedly. With the increase of production and development time, the residual oil around old fractures decreases year by year, and the economic efficiency of repeated fracturing decreases year by year. Utilizing the characteristics of high content of impurities in sewage, low viscosity and small pollution, combined with the conventional fracturing technology, the near well is charged and the local stress field is changed to make new cracks and make multiple fractures so as to increase new drainage channels and increase Single-well fracturing stimulation effect.