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水力压裂工艺技术正面临着从传统的单一平面裂缝向产生弯曲裂缝网络和多条水力裂缝同时发育的概念性转变。这一新概念被用来分析火山岩地层中进行的两次加支撑剂的压裂处理。两次压裂虽然产能都增加了一倍,但是压裂是不成功的。压裂施工净压力很高,并且施工中出现了早期脱砂现象。传统的单一平面裂缝概念无法解释压裂压力动态或压后产能和压力动态,应用多裂缝几何形态可以很好地解释这一问题,并且能够成功地模拟压裂压力。这种裂缝几何形态与压裂施工中出现的早期脱砂现象以及压后生产动态完全一致。压裂压力和随后的生产动态综合分析证实在火山岩地层中产生了多条裂缝。
Hydraulic fracturing technology is facing a conceptual shift from the traditional single plane fracture to the development of a curved fracture network and the simultaneous development of multiple hydraulic fractures. This new concept was used to analyze fracturing treatment with proppants added twice in volcanic formations. Although both fractures doubled their capacity, fracturing was unsuccessful. The net pressure of fracturing is very high, and the phenomenon of early sand removal occurred during construction. The traditional concept of a single plane fracture can not explain the fracturing pressure dynamic or the post-press capacity and pressure dynamics. The application of multi-fracture geometry can well explain this problem and successfully simulate the fracturing pressure. This fracture geometry is consistent with the early occurrence of sand removal during fracturing and the post-press production dynamics. A comprehensive analysis of fracturing pressures and subsequent production dynamics confirmed that multiple fractures were generated in volcanic formations.