压裂过程中地面和井下倾斜场的主控因素研究

水力压裂技术改造储层已经成为非常规油气开发的重要技术手段，以井下测斜仪为代表的远场测量技术进行裂缝形态监测已经逐步应用于压后裂缝效果评价。采用不同的裂缝分析模型对压裂过程中地面和井下倾斜场进行了正演研究，验证了模型的正确性，并采用矩形张裂缝模型对影响压裂倾斜场的地层和裂缝参数进行了定量分析。研究表明，（1）地面倾斜场对于裂缝的方位角和倾角变化较为敏感，对于裂缝的尺寸及裂缝中心深度变化不敏感；（2）井下倾斜场值对于裂缝的尺寸、裂缝中心深度变化较为敏感，对于裂缝的方位角及倾角变化不敏感。研究结果可应用于储层水力压裂优化设计中。

Investigation on major factors controlling surface and subsurface inclined fields upon hydraulic fracturing

Hydraulic fracturing is an important technique for unconventional oil and gas reservoir. The far field measurement technology has represented by down-hole gauge, the split extending shape has been applied to the effect evaluation of hydraulic-fracture. The major factors on surface and subsurface inclined fields are studied upon hydraulic fracturing; and then the model is verified to be correct. Using rectangle crack model, a quantitative analysis of the formation and fracture parameters are carried out. Research results show: (1) The ground tilt field is sensitive to the change of azimuth and dip angle of the crack, the crack size and depth of the crack centre is not sensitive. (2) The inclination of the field is sensitive to the crack size and depth of the crack; but to the azimuth and dip angle of the crack is not sensitive. The results can be applied to optimization design of hydraulic fracturing in reservoir.