摘要
长庆油田华庆长6油藏为典型的超低渗透油藏，水平井注水开发技术可提高开发效果，如何进行压裂裂缝优化设计是提高开发效果的关键。在对油藏特征分析的基础上，结合注采井网对水平井压裂裂缝长度、改造段数、布缝方式及施工参数进行了优化研究，提出了适合华庆长6超低渗透油藏水平井的改造参数。24口水平井矿场实践表明，该参数组合具有较好的适应性，水平井产量达10．3t／d，为直井的5倍，对类似油藏水平井压裂参数优化具有借鉴意义。
Chang6 reservoirs in Huaqing, PetroChina Changqing Oilfield Company, are of typical ultra-low permeability. Waterflood- ing technology in horizontal wells can improve effectiveness of oilfield development. How to optimize fracture design is the key to im- prove lhe development effectiveness. Based on the analysis of the oil-reservoir characteristics, the fracture length from the horizontal well, the number of stimulated intervals, fracture distribution patterns, and construction parameters are optimized by comtfining with iujector-prnduccr patterns. The suitable stimulation parameters are proposed fbr horizontal wells in uhra-low permeability Chang6 reservoirs of Huaqing oilfield. Field practice of 24 horizontal wells shows that the combination of the parameters has better adaptability. The production rate of horizontal wells reaches 10.3 t/d, 5 times as many as that of vertical wells. This can be reference for parameter optimization of fracturing horizontal wells in similar reservoirs.
关键词
超低渗透油藏
水平井
压裂裂缝
优化设计
tra-low permeability reservoir
horizontal well
induced fracture
optimal design
