斜井多段压裂工艺开发致密油效果分析

Effect Analysis of Oblique Well Multi-Section Fracturing Technology for Development of Tight Oil Reservoirs

鉴于致密油勘探潜力巨大，但国内尚未形成储层改造的主体技术，为此引入了斜井多段压裂工艺。通过分析斜井多段压裂增产机理，建立斜井多段压裂选井条件的量化模型；根据室内岩心测试、小型测试压裂分析、裂缝拟合等技术手段确定储层改造参数；并针对庄211长6致密砂岩油藏进行了大量的现场试验。试验结果表明，该工艺能够显著扩大裂缝与油藏的接触体积，提高单井产量，对致密油开发具有借鉴意义。

Tight oil exploration has huge potential of exploration, but the mainstay technology of reservoir stimulation has not formed yet at home. For this purpose, a technology of muhi-section fracturing ill a slant well is introduced in Ihis paper. A quantitative model for well and layer selection of the slant well multi-section fl＇acturing is built up, based on the analysis of increasing mechanism of muhi-section fractnring in a slant well. parameters of the reservoir stimulation determined by the technical means of indoor core tests, small-scale diagnostic fracturing analysis, and fracture fitting, etc. a large number of pilot field tests in tight sandstone Chang6 oil reservoirs of Zhuang211 area is carried out. The results show that this technology can evidently expand the stimulated reservoir vol- ume contacted by the fractures, and improve the individual well production.