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苏里格气田储层具有“低孔、低渗、低压”的特点,水力压裂改造成为开发该气田的主要手段。由于储层物性变化大、多薄层等原因,单井压裂改造裂缝参数在井网中效应的优化难度很大,施工参数很难考虑地应力剖面的纵向控制效果。因此,针对压裂改造中的突出难点,提出了相应的解决对策:建立单井与井网匹配优化模型,充分利用数值模拟、裂缝参数优化、应力剖面分析技术和裂缝闭合优化等技术。应用上述配套技术,使得压裂改造的裂缝参数与储层的匹配更加紧密;根据应力特征优化的参数更有针对性,有利于获得合理裂缝剖面;利用所提出的小型压裂技术进一步增强了对储层的认识和对压裂工艺的提升。为苏里格气田的储层改造和压裂效果的评估提供了技术支持。
The reservoirs in the Sulige gas field are characterized by “low porosity, low permeability and low pressure”, and hydraulic fracturing has become the major means of developing this gas field. Due to the large variation of reservoir physical properties and multiple thin layers, it is very difficult to optimize the effect of single well fracturing parameters in well pattern. It is very difficult to consider the vertical control effect of geostress profile in construction parameters. Therefore, in order to solve the salient points in fracturing, a corresponding countermeasure is put forward: matching optimization model between single well and well pattern is established, and the techniques of numerical simulation, optimization of fracture parameters, stress profile analysis and crack closure optimization are fully utilized. Applying the above matching technologies, the fracturing parameters of fracturing are more closely matched with those of reservoirs. The parameters optimized according to the stress characteristics are more pertinent to obtain a reasonable fracture profile. With the proposed fracturing technology, Reservoir understanding and improvement of the fracturing process. Provided technical support for the evaluation of reservoir reconstruction and fracturing effects in the Sulige gas field.