宽带暂堵转向多缝压裂技术在苏里格气田的应用

为了提高水平井裸眼滑套-封隔器完井、套管固井完井、桥塞分段多簇压裂等施工过程中分级压裂多缝封隔的可靠性，在实验室条件下对暂堵材料进行了分散性测试、降解性分析以及抗压破碎能力评价，并将宽带暂堵转向多缝压裂技术在苏里格气田进行现场应用，取得了较好的转向效果。应用结果表明，采用宽带暂堵转向多缝压裂技术，减少了桥塞、封隔器相关的操作，减少了电缆入井次数，降低了施工风险，提高了施工效率；同时，利用压裂产生的多条裂缝或裂缝网络与气藏富含区域连通，增加了裂缝的长期导流能力，对比同区块水平段长度及钻遇条件相当的水平井，试气无阻流量提高21.1%，投产1年，平均单井累产气量增加3.24×106 m3。暂堵剂与纤维在气田储层温度在90~120℃范围内可实现10d以内完全降解，完全符合安全环保生产要求。

Application of Diversion through Broadband Temporary Plugging Multi-Fracture Fracturing Technology in Sulige Gas Field

To improve the reliability of insulating multi fractures for staged fracturing job in horizontal well completion operation such as open-hole sliding sleeve-packer completion and casing cementing well completion as well as bridge plug segmented multi-cluster fracturing, temporary plugging agents were evaluated in laboratory experiment for their dispersibility, degradability and compression resistance. The diversion through broadband temporary plugging multi-fracture fracturing technology was used in Sulige gas field with good diverting effect. Field application showed that, using diversion through broadband temporary plugging multi-fracture fracturing technology, operation of bridge plug and packer was simplified, number of cable running reduced, operational risk mitigated and operation efficiency improved. Meanwhile, the long-term flow conductivity of fractures can be increased by the connection of multi fractures or fracture network produced by the fracturing operation to gas-rich zones. Compared with offset horizontal wells with similar horizontal lengths and downhole conditions, the open flow rate of gas during well test was increased by 21.1%. After one year of production, the average cumulative gas production of a single well was increased by 3.24×106 m3. The temporary plugging agents and fibers used can be completely degraded in 10 days at reservoir temperature of 90-120℃ in Sulige gas field, fully meeting the requirements of safe and environmentally friendly production.