缝网压裂技术在鄂尔多斯盆地适用性探证

Discussion of applicability of fissure-network-formed fracturing technology in Ordos Basin

鄂尔多斯盆地致密砂岩不同于北美页岩，国内缝网压裂技术研究处于起步阶段，无现成技术模式可供参考通过研究鄂尔多斯盆地长7储层的地质特点，对鄂尔多斯盆地长7缝网压裂适用性进行了分析结果表明．鄂尔多斯盆地长7储层具有发育良好的结构弱面、渗透率低、脆性指数高、水平最大主应力与天然裂缝有低的逼近角等地质特征，满足缝网压裂改造的基本储层条件利用裂缝监测技术和现场生产数据对近年实施的部分并进行效果分析．开辟新的高效开发技术思路，为缝网压裂技术的完善与现场规模化应用奠定了坚实的理论基础。

Tight sandstone in Ordos Basin is unlike the shale in North America. Researches of fissure-network-formed fracturing technology at home are in its infancy, no ready-made technology model for reference. By studying the geological features of Chang7 reservoirs, applicability of fissure-network-formed fracturing of Chang7 reservoirs in Ordos Basin is analyzed in the paper. The results show that： the Chang＇/reservoirs have geological characteristics such as well-developed weak structure surface, low permeability, high fragility index, low approaching angle between the maximum horizontal principal stress and natural fractures. They can fulfil the basic reservoir conditions of fissure-network-formed fracturing. The effect of parts of wells implemented in recent years is analyzed by use of fracture monitoring technology and field production data. It opened up a new technology idea of efficient oilfield development, but also laid a solid theoretical foundation for the improvement and large-scale field application of fissure-network-formed fracturing technology.