Hydrajet fracturing has the advantages which not only include perforating without compacted zone, creating fracture exactly, but also include controlling fracture height, shortening the working cycle, reducing operation risk and etc.[. Through studying the optimization of nozzle materials and combination, string structure, operation pressure of surface casing and annular displacement, the hydraulic jet multistage fracturing technology is formed. This technology is successfully used and proves it has good popularization and application.
Aiming at the southern areas of Bohai glutenite reservoir natural capacity is low, without obvious interlayer, filter lost badly, cause conventional hydraulic facturing in short of effect on increasing production, the paper conducted the research and application of technology on Y104-6 well. According to the reservoir geological characteristics and well conditions, the paper studied on fracturing scale determination, the perforating section, and the optimization of fracturing material selection, and application. Completed the injection into well fluid amount 1491.9 m3, proppant 188 m3, displacement of pump 7.5 m3/min. After treatment, average fluid flowing production achieved 18.6 t/d, average daily oil production 6.8 t, stimulate effect and the economic benefit is remarkable. This well fracturing technology, make the successful application of the southern areas of Bohai glutenite reservoir a significant breakthrough, recoverable reserves get promoted for big thick section glutenite reservoir development and vertical fracturing of the organization and implementation has provided valuable experience.
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