不动管柱多层压裂及排液一体化工艺技术研究与应用

为满足探井试油需要,研究了不动管柱多层压裂及排液一体化工艺技术.该技术包括3种形式：压裂两层及排液一体化管柱、选择压裂一层及排液一体化管柱及选择压裂两层及排液一体化管柱.该技术利用一趟管柱,对一个或两个层实施压裂,并在不动管柱的前提下,实现压后排液求产;同时通过管柱的结构设计与井下工具的合理设计,实现井下压力监测与压后井温测试,形成了集压裂、排液、求产、测压、测井温等于一体的完整配套的工艺技术.应用该技术在大庆外围油田及海拉尔地区的5口井中进行了现场试验,成功率100%.该技术使试油工序衔接得更加紧密,既可减少压裂液对储集层的浸泡时间,降低储集层的损害程度,又可降低作业成本,改善作业环境,实现绿色施工,具有广泛的推广应用前景.图6表4参8

Research and application of the multi-layer fracturing and flowing back without pulling string technology

The multi-layer fracturing and flowing back without pulling string technology is discussed. The technology can fracture one layer or two layers, and finish flowing back and the production testing after fracturing without pulling string; with the reasonable design of string structure and downhole tools, the pressure monitoring and well temperature measuring can be finished, and a complete set of technology is formed that contains multi-layer fracturing, flowing back, production testing, pressure monitoring after fracturing. The technology was applied to 5 wells of Daqing peripheral oilfields and the Hailar area and good results were obtained, the success rate was 100%. This technology can meet the need of uninterrupted growth of petroleum exploration and development and link up the production test working procedure more closely, h not only reduces the soak time of fracturing fluid to oil pay, the damage scale of oil pay, and the cost of operation, but also improves the operation environment and realizes non-pollution operations.