海上小井眼大通径一次多层压裂充填工具研究

渤海蓬莱油田平均每年进行约50口井的侧钻井作业,采用?177.8 mm尾管射孔的小井眼完井技术和单层压裂充填防砂工艺,保证其防砂效果和油井产能.但是,单层逐级压裂充填防砂的整体时效性差、费用高.现有的一次多层压裂充填防砂技术存在管柱通径小、细分层数少、压裂充填排量受限等不足.以?177.8 mm小井眼完井为例,研制了一...

Research on One-trip Multi-layer Fracture Packing Toolwith Large Bore Size in Offshore Slim Hole

On average about 50 wells were sidetracked every year in Penglai oilfield of Bohai. The 177.8 mm tail pipe perforation completion of single layer fracture packing sand control were basically used to ensure sand control effect and oil production capacity. However, the overall timeliness of single-layer fracturing and sand control is poor with high cost. The existing sand control technology of multi-layer fracturing have the disadvantages such as smaller pipe column path, less subdivision layers, limited pump rate. Taking Penglai 177.8 mm slim hole completion as an example, A one-trip six layers or more subdivision fracture packing sand control string and tool with 98.55 mm bore size was develoved. The strength analysis and lab experiments were carried out for key tools such as reciprocating and pressurized seal modules. The test results show that the various technical parameters of the tool can meet the operational needs of the Penglai oilfield, and are better than similar tools at home and abroad, with good application prospects.