Design research on the composite process of consecutive perforation-strong pulse fracturing for multiple oil layers and thick interlayer

摘要

Currently, most of Chinese oil companies have getting in the later production period, the oil wells are processed frequently and the cost is increasing. In view of the higher problems existed popular in the oil fields such as multiple layers, big interlayer, the technology composited perforation and high energy gas fracturing has to construct with every layer alone, operate long time, cost high. The author puts forward the design research on the composite process of consecutive perforation-strong pulse fracturing for multiple oil layers and thick interlayer This paper introduces the basic design principle and technology method. The design is realized by using the technology of the perforation-symmetrical overpressure fracturing technology, the multi-pulse multistage fracturing, to efficiently guarantee the effect of perforating and pulse fracturing in every layer. The designed multistage detonating device makes the once completed construction technology used in the single well of the multiple oil layers with big interlayer come true. The field test application has gained good effects, greatly reduced the construction cost, and also promoted the application and generalization of the technology composited perforation and high energy gas fracturing.