新疆油田利用地震资料预测套管变形技术

Application of Seismic-Based Casing Deformation Prediction Technology in Xinjiang Oil Field

随着水平井和水力压裂技术在新疆油田页岩油藏的应用,出现了越来越多的套管变形现象。一旦出现套管变形将会带来巨大的经济损失,如压裂施工无法正常进行、井段丢失和单井产量不高等问题。通过对套管变形处的地球物理响应特征分析,建立相关模型,利用三维地震属性在水平井压裂前开展套管变形预测,优化压裂方案,在施工过程中综合微地震监测成果开展套管变形预警,指导压裂施工,最大限度减少套管变形的发生,改善储层改造效果,提高单井产量。

With the application of horizontal well and hydraulic fracturing technology in the development process of shale oil in Xinjiang Oilfield,there have emerged more and more casing deformation cases,which bring huge economic loss.In addition,other problems such as abnormal fracturing operation,missing well sections and low individual well production also arise.In this paper,a relevance model is established by analyzing the geophysical response characteristics where casing deformation occurs,so that casing deformation can be predicted using the three-dimensional seismic attributes to optimize the fracturing program before a horizontal well is subjected to fracturing.Consequently,early warning for casing deformation during fracturing becomes possible after combing with monitoring results of microseismic to guide fracturing operation,which minimizes the occurrence of casing deformation,improves the effect of reservoir fracturing,and enhances the production of individual wells.