阿姆河大斜度酸性气井永久分段完井工艺

Permanently-segregated completion technology of highly-deviated acidic gas well in Amu Darya

孙杰文 程维恒 吴志均 王鹏 邵昭媛

SUN Jiewen CHENG Weiheng WU Zhijun WANG Peng SHAO Zhaoyuan

中国石油勘探开发研究院廊坊分院，河北廊坊　065007 中国石油阿姆河天然气勘探开发公司，北京　100010 中国科学院渗流流体力学研究所，河北廊坊　065007

Langfang Branch of PetroChina Research Institute of Exploration and Development, Langfang 065007, China CNPC Amu Darya River Natural Gas Corporation, Beijing 100010, China Institute of Porous Flow and Fluid Mechanics, Chinese Academy of Sciences, Langfang 065007, China

分段完井已逐渐成为水平井、大斜度井储层保护、控水及分段改造的主要手段。基于膨胀橡胶的遇油遇水膨胀封隔器是分段完井的关键工具。系统总结了此类封隔器的技术特征与应用特性，进行了胀封机理、影响因素研究，给出了胀封后主要技术指标及5 种结构类型遇油膨胀封隔器的技术特点。研究结果表明，酸、碱、盐溶液对于已膨胀橡胶影响幅度小于10%，遇油膨胀封隔器具有结构简单、操作方便、坐封可靠、多次膨胀及永久膨胀等明显技术优势。阿姆河气田BP101D 井是一口高温、高压、高含硫大斜度井，预测产量超过110×104 m3/d，底部完井工艺设计采用遇油膨胀封隔器与增产滑套为核心工具的永久分段完井管柱组合，储层的成功分段为后期的找堵水、定点有效控水、分段改造提供了技术窗口，为高产气井可持续高效采气提供了技术支持和保障。

The segregated completion technique has been the main method to protect the reservoir of highly-deviated /horizontal wells, control water and perform staged stimulation. The oil/water swelling packer which is based on swelling rubber is the key tool for segregated completion technology. This paper summarizes the technical and application feature systematically, studies the swelling sealing mechanism and influence factors have been carried on research and providing the main technical indicators after packer swelling and technical features of five types of swelling packers. The results show that the influence of acid, alkali and salt on the swelling rubber are less than 10% and the oil swelling packer has the outstanding technical advantages of easy operation, reliable setting, multi-expansion and permanent expansion. For the application in BP101D, a highly deviated/high temperature, high pressure, high sulfur well in Amu Darya Gas Field, it is predicted that the yield is more than 110×104 m3/d. The bottom well completion technology use permanently-segregated completion string which takes the oil swelling packer and sliding sleeve as core tools. The successful segmentation of reservoir provides a technical window for future water blocking, effective water control at fixed point and staged stimulation, and the technical support and guarantee for continuous production of high-yield gas.

10.13639/j.odpt.2014.02.017