水平井穿层压裂技术研究与应用

Research and application on horizontal well translayer fracturing technology

大庆油田低丰度葡萄花层薄互层发育,采用常规水平井开发储量损失大、注采关系不完善。为此,打破传统压裂控缝高理念,通过压裂工艺参数优化,使人工裂缝沟通纵向储层,提高储层动用程度。对水平井穿层压裂技术原理进行了分析,对穿层压裂效果进行评价,探讨提高穿层压裂成功率的方法。现场试验165口井,穿层工艺成功率93%,单井纵向目的层小层动用率100%,与同区块常规压裂水平井对比,施工规模为0.97倍,而压后初期单井日增油为1.25倍,累计增油为1.26倍,取得了明显的增产效果,水平井可控穿层压裂技术实现了少井高产和难采储量的整体动用。

Because Daqing oilfield is low abundance Putaohua thin interbed development, the loss reserves is larger and the relationship between injection and production is imperfect when using the conventional horizontal wells development. The reservoir producing ratio can be increased by breaking the traditional high fracturing fracture-control philosophy and optimizing fracturing process parameter. The horizontal well translayer fracturing technology principle was analyzed, the effects of fracturing were evaluated and the improving translayer fracturing success rate method was discussed in this paper. 165 wells have been tested on site. The translayer technology success rate is 93%. The producing ratio of single well longitudinal object layer is 100%. Compared with block of the same conventional fracturing horizontal wells, the construction scale is 0.97 times. After initial period of the translayer fracturing for single well, the increasing oil per day is 1.25 times, cumulative increasing oil is 1.26 times, some better yield-increasing effects can be achieved. The higher yield-increasing with less wells and overall use of the difficult-to-produce reserves can be realized by the technology of controllable translayer fracturing for the horizontal well.