沁水盆地南部3号煤压裂曲线特征及施工建议

由于煤岩的非均质性强，储层物性差异大，其压裂施工曲线形态各异。通过对沁水盆地南部3号煤层200多口井的压裂施工曲线分析，总结出前置液阶段分为下降型、下降波动型、稳定型和下降稳定型，携砂液阶段分为下降型、下降稳定型、上升型、稳定型和波动型，测压降阶段分为压力下降较陡型和压力下降较缓型。同时，阐述了每种类型产生的原因。最后给出压裂施工相关建议。

Characteristic of fracturing curve of seam NO.3 in south of Qinshui basin and suggestion about operation

Due to strong heterogeneity and big differences of properties in coal reservoir, the fracturing curves show various shapes. Based on analysis of the fracturing operation curve of over 200 wells in seam 3 in southern Qinshui basin, it is summed up that the prepad fluid stage was divided into descending type, descending-undulating type, stable type and descending-stable types, and the sand-carrying fluid stage into descending type, descending-stable type, ascending type, stable type and undulating type, the pressure drop measurement stage into sharp pressure drop type and slow drop type. At the same time, the reasons for each type were explained. Finally, related suggestions were given for fracturing operation.