管外光纤监测压裂单簇裂缝延伸强度现场试验

新疆油田石炭系火山岩储层非均质性较强，多簇压裂和暂堵转向压裂开发效果差异较大，主要原因在于常规压裂监测技术难以准确监测各簇裂缝进液和扩展情况从而采取针对性措施，为此进行了管外光纤监测技术现场实验。实验结果表明，管外光纤技术能实时测量井筒的温度分布，同时通过声波振动能实时了解压裂施工过程中各簇的进液情况。通过对测得温度数据和震动数据进行合理的解释后，可以得出各簇不均匀进液情况，针对性的设计暂堵或重复压裂改造工艺，促进各簇裂缝均匀进液扩展，从而较大幅度提高储层改造体积。根据管外光纤的实时现场结果，优选段内多簇+极限限流+暂堵压裂技术，在西北缘石炭系推广应用32井次，压裂后单井平均产量提高13%，取得了良好的应用效果。

Field Test of Single Cluster Fracture Extension Strength Monitoring by Optical Fiber Outside Casing

The carboniferous volcanic reservoir in Xinjiang Oilfield has strong heterogeneity, and the development effects of multi-cluster fracturing and temporary plugging and diversion fracturing are quite different. The main reason is that the conventional fracturing monitoring technology is difficult to accurately monitor the fluid inflow and expansion of each cluster fractures, unable to take targeted measures. Therefore, field experiments were carried out for the optical fiber monitoring technology outside the casing. The experimental results show that the outside-casing optical fiber technology can measure the temperature distribution of the wellbore in real time, while the acoustic vibration can provide real-time information about the fluid intake of each cluster during the fracturing construction. After reasonable interpretation of the measured temperature data and vibration data, the uneven liquid inflow of each cluster can be obtained, and the temporary plugging or repeated fracturing reforming process can be designed specifically to promote the uniform liquid inflow and expansion of each cluster's fractures, so as to significantly increase the volume of reservoir reconstruction. According to the real-time outside-casing optical fiber field results, the multi cluster + limit flow + temporary plugging fracturing technology in the optimized section has been popularized and applied in 32 wells of the Carboniferous System in the northwest edge. The average production of a single well after fracturing has increased by 13%, achieving good application results.