长庆油田华庆长6水平井压裂裂缝优化设计研究

Study on Optimization Design of Huaqing Chang6 Horizontal Well in Changqing Oilfield

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10.3 t/d,为直井的5倍。

Huaqing Chang6 reservoir in Changqing oilfield is the typical ultra-low permeability one,at where water flooding technology for horizontal well can improve developing effectiveness,and how to optimize fracture design is the key to improve it. Based on the analysis of reservoir characteristics and combined with injection patterns,fracture length,the number of transformation segment,manner of arranging cracks and operation parameters of the horizontal wells are optimized and studied,and transformation parameters suiting for Huaqing Chang6 ultra-low permeability reservoir are proposed. 24 trail practices in horizontal wells show that the combination of parameters has better adaptability,and horizontal well production reaches 10. 3t / d,which is as 5 times as that of straight well.