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老井重复压裂是石油开采领域面临的重大技术课题。分析了低渗透油藏高含水期油田生产特点 ,提出了一种新的重复压裂技术 ,即堵老缝压新缝重复压裂 ;阐述了其技术原理和配套工艺技术 ;研究开发了一种满足性能要求的老裂缝堵剂。该套技术在长庆油田应用取得了十分显著的经济效果 ,证明了重复压裂可以形成新裂缝。
Re-fracturing in old wells is a major technical issue in the field of oil exploration. This paper analyzes the production characteristics of oilfields with high water cut in low permeable reservoirs and puts forward a new technology of repeated fracturing, that is, fracturing of old fractures with new fractures; expounds its technical principle and supporting technology; Meet the performance requirements of the old crack plugging agent. This set of technologies has achieved remarkable economic results in the application of Changqing Oilfield, proving that repeated fracturing can form new cracks.