致密砂岩气藏水平井压裂裂缝特征评价

Features of Induced Fracture for Horizontal Well in Tight Sandstone Gas Reservoirs

针对川西地区致密砂岩气藏水平井压后缺乏有效的裂缝监测和评价手段的问题,从现场试验和室内评价两方面入手,开展了井下微地震裂缝现场试验,进行了三维压裂模型拟合分析评价,得出了川西水平井各级压后均能形成裂缝,多簇射孔及限流压裂工艺能保证两条以上裂缝起裂等结论。

Almost no effective tools are used to monitor and evaluate induced fracture from horizontal well in tight sandstone gas reservoirs, western Sichuan Basin. So, starting with field experiments and lab evaluation, we carry out some experiments on microseismic fractures, and implement an evaluation of 3D fracture model. Finally, two conclusions, containing to induce fracture after different stage fracturing, and to generate more than two fractures after both multi- cluster perforation and limited entry fracturing, are made.