石油钻采工艺2025，Vol.47Issue(3)：357-364,8.DOI:10.13639/j.odpt.202504004
低渗致密砂岩压驱压裂用双卡瓦防解封封隔器
Double-slip anti release packer for driving-fracturing of low permeability tight sandstone
摘要
Abstract
The casing of offshore low-permeability tight sandstone fractured wells mainly has an outer diameter of 177.8 mm and 244.5 mm.The formation temperature and pressure are high,and the number of injection cycles is large.Conventional Y441 packers are used in combination with hydraulic anchors for fracturing operations.The pressure in the annulus below the packer can be converted into an upward unseating force on the packer.There is a risk of the packer being unseated when the pressure difference between the tubing and the annulus is low or when the hydraulic anchor slips.A double slips anti-unseating structure was designed for the fracturing packer.Numerical and physical simulations were carried out in the set state and during the annulus pressurization process to verify its anti-unseating performance.The API-11D1-V3 test was also conducted at a maximum temperature of 150℃,and the feasibility of fracturing without a hydraulic anchor was analyzed.The field application results show that the double slips anti-unseating packer can be used for multiple cycles of single-layer or multi-layer fracturing operations in casings with an outer diameter of 244.5 mm.It is suitable for fracturing wells with a wellhead operating pressure not exceeding 50 MPa and a reservoir temperature not exceeding 150℃.The hydraulic anchor can be omitted by adding an expansion joint above the packer or applying a certain tonnage of downward pressure.The research on the double slips anti-unseating packer provides a new technical direction for the design of offshore fracturing tubing strings and offers reference experience for the development of fracturing packer tools.关键词
双卡瓦防解封封隔器/提前解封/多轮次压驱压裂/防解封能力/API-11D1-V3测试Key words
double-slip anti release packer/unseal in advance/multiple rounds of driving-fracturing/anti unsealing capability/API-11D1-V3 testing分类
能源科技引用本文复制引用
刘鹏,罗建伟,张云驰,罗振清,王立新,刘传刚..低渗致密砂岩压驱压裂用双卡瓦防解封封隔器[J].石油钻采工艺,2025,47(3):357-364,8.基金项目
中海油能源发展科研基金"增储上产关键技术/产品研究重大专项(稳油控水、化学驱、低渗压裂方向)"(编号:HFKJ-ZX-GJ-2023-02)部分成果. （稳油控水、化学驱、低渗压裂方向）
