江汉油区高压高应力地层压裂工艺研究

压裂增油一直是江汉油田的主要增油手段之一,但近几年随着勘探开发范围的进一步扩大,遇到的高压、高应力储层不断增多。通过近1年多的压裂施工,对高压井进行统计分析,掌握了江汉油区高压、高应力储层的地质特征,并应用各种手段对储层施工压力和应力特征进行分析,提前预测出高压、高应力地层情况并对后续施工采取相对应的措施,特别是对一些突遇的异常高压井的压裂施工提出解决办法,取得了显著的改造储层效果。

On Fracturing Technology in High-pressure and High-stress Formation of Jianghan Oil Region

Fracturing Stimulation has been one of main stimulation methods in Jianghan Oilfield.But along with the further enlarging the scope of exploration and development in recent years,high-pressure and high-stress oil reservoirs increasingly appear.The authors,having experienced over-one-year fracturing construction and statistically analyzed high-pressure wells,summarize the geological characteristics of high-pressure and high-stress oil reservoirs,try to recognize the features of reservoir construction pressure and stress,pretest the formation condition with high pressure and high stress in advance,take countermeasures in follow-up construction,and,especially,put forth the solutions to fracturing construction of some unexpected abnormal high-pressure wells,which effectively reform the reservoirs.