致密油藏分段多簇压裂水平井开发效果评价

Evaluation of Development Results of Horizontal Wells with Multi-Staged and Multi-Clusters Fracturing in Compact Reservoir

针对国内目前致密油藏分段多簇压裂水平井近井渗流特征和开发效果评价研究较少,利用数值模拟方法研究了致密油藏分段多簇压裂水平井近井渗流特征,并从新的角度对分段多簇压裂水平井的产能影响因素进行了分析。结果证明,分段多簇压裂可以大幅度降低近井地带渗流阻力;分段多簇压裂水平井初期日产油量高,采油速度快,采出程度高;近井地带体积压裂改造区越大,破碎程度越高,分段多簇压裂水平井初期产能越高。

This paper,using numerical simulation method,explores near-wellbore percolation characteristics of multi-staged and multi-clusters fractured horizontal wells in compact reservoir and analyzes the productivity-influencing factors from the new angle.It is concluded that multi-staged and multi-clusters fracturing contributes to sharply reducing near-wellbore percolating resistance,that fractured horizontal wells are characterized by higher daily production rate,faster production speed and higher recovery degree at initial stage of production and that the bigger fracturing transformation area of near-wellbore zone is and the higher crushing degree is,the higher early productivity is.