超高扩径不动管柱选层堵水工具及工艺  

Ultra-high Expansion Layer Selection and Water Plugging Tool and Technology without Tripping Tubing String

作　　者：邹先雄 李晨泓 何秀萍 Zou Xianxiong;Li Chenhong;He Xiuping(CNOOC EnerTech-Shanghai Drilling&Producing Branch;Shanghai Branch of CNOOC(China)Co.,Ltd.)

机构地区：[1]中海油能源发展股份有限公司上海工程技术分公司 [2]中海石油(中国)有限公司上海分公司

出　　处：《石油机械》2024年第1期82-87,共6页China Petroleum Machinery

基　　金：中国海洋石油集团有限公司重大科技专项“含水气藏排(堵)水采气工艺技术研究与实践”(CNOOC-KJ 135 ZDXM)。

摘　　要：海上油气开发过程中,由于管柱特殊性,需通过?73.0 mm油管在?244.5 mm套管内实施选层堵水,堵水工具要求扩径比达到424%、耐压15 MPa。已有可膨胀桥塞和封隔器工具仅能实现最高扩径比350%、封堵底层。鉴于此,利用小管径连续管可穿过常规油管优势,基于伞形扩径原理,研制了过油管双伞单封式超高扩径不动管柱选层堵水工具,并针对工具特点,对堵剂和施工工艺进行了优选与优化。试验结果表明,选层堵水工具可有效通过最小内径为55.6 mm的?73.0 mm油管,在内径为217.3 mm的?244.5 mm套管内实现选层坐封,封堵后过流通道内径25.4 mm,可实现不动管柱情况下一趟钻完成选层堵水,具有扩径比大、不动管柱、不使用火工品、作业周期短、费用低等显著优势。研究结果可为水淹井开发提供一项新的技术手段。In the process of offshore oil and gas development,due to the special nature of the pipe string,it is necessary to useø73.0 mm tubing to implement layer selection and water plugging inside theø244.5 mm casing,and the water plugging tool needs to have an expansion ratio of 424%and a pressure resistance of 15 MPa,while the existing expandable bridge plugs and packer tools can only achieve a maximum expansion ratio of 350%and seal the bottom layer.With the help of the advantage of small diameter coiled tubing to pass through conventional tubing,based on the principle of umbrella shaped expansion,a through tubing dual-umbrella single packer ultra-high expansion layer selection and water plugging tool without tripping tubing string was developed.Then,based on the characteristics of the tool,the plugging agent and operation process were optimized.The test results show that the layer selection and water plugging tool can effectively pass through theø73.0 mm tubing with a minimum inner diameter of 55.6 mm to realize layer selection and setting in theø244.5 mm casing with an inner diameter of 217.3 mm.After setting,the inner diameter of the flow passage is 25.4 mm,achieving layer selection and water plugging in one trip without tripping tubing string,so the tool has obvious advantages such as large expansion ratio,without tripping tubing string,without using initiating explosive devices,short operation cycle and low cost.The research provides a new technical means for the development of drowned wells.

关 键 词：选层堵水 堵水工具 超高扩径 不动管柱 堵水工艺 连续管 过油管 

分 类 号：TE244[石油与天然气工程—油气井工程]