裸眼分段工具高温高压性能稳定性评价实验  

Experiments evaluating performance stability of stage tool under high-temperature and high-pressure conditions in open hole

作　　者：夏富国 米光勇 李成全 陆小锋 朱波 王洋 XIA Fuguo;MI Guangyong;LI Chengquan;LU Xiaofeng;ZHU Bo;WANG Yang(Development Division of PetroChina Southwest Oil&Gasfield Company,Chengdu,Sichuan 610011,China;Guanghan Chuan Oil Well Control Equipment Company,Guanghan,Sichuan 618300,China;Engineering Technology Research Institute of PetroChina Southwest Oil&Gasfield Company,Chengdu,Sichuan 610017,China)

机构地区：[1]中国石油西南油气田分公司开发事业部,四川成都610011 [2]广汉川油井控装备有限公司,四川广汉618300 [3]中国石油西南油气田分公司工程技术研究院,四川成都610017

出　　处：《油气井测试》2024年第1期43-48,共6页Well Testing

基　　金：中国石油天然气股份有限公司西南油气田分公司重大科研项目“双鱼石栖霞组超深大斜度水平井分段酸压及配套技术研究”(20200302-14)。

摘　　要：针对现有的井下工具测试系统不能模拟高温高压泥浆条件下工具稳定性测试的问题,研制了高温高压井下工具性能稳定性评价装置。该装置具备温度200℃、压力105 MPa,在多种流体介质中开展工具性能测试的能力。利用该装置,模拟井下工具在油基泥浆里的下入过程,设计开展了胶筒在油基泥浆中的高温高压老化腐蚀和分段工具的密封稳定性两个实验。结果显示胶筒在高温高压下发生膨胀,但整体膨胀的尺寸相对较小,不影响工具下入;实验后胶皮表面光滑、无开裂无鼓包;分段工具保压10 d,无压降。经XX001-H6井裸眼多段酸化施工应用,温度176℃,压力97.32 MPa,封隔器密封可靠、滑套性能稳定。本实验方案的顺利实施为高温高压工具稳定性实验提供了新的技术思路。The existing downhole tool testing systems cannot simulate the tool stability under high-temperature and high-pressure mud conditions.To solve this problem,a device for evaluating the performance stability of downhole tools under high-temperature and high-pressure conditions was developed.The device is capable of tool performance testing at temperatures up to 200℃and pressures up to 105 MPa,in various fluid media.By utilizing this device,experiments were designed to analyze the high-temperature and high-pressure aging corrosion of rubber sleeve in oil-based mud(OBM)and the sealing stability of stage tool during a simulated tool running process in OBM.The results show that the rubber sleeve expanded under high-temperature and high-pressure conditions,but the overall expansion size was relatively small,not affecting the tool running.The rubber surface remained smooth without cracks or bulges after the experiment.The stage tool maintained a constant pressure for 10 days with no drop.The field application in well XX001-H6,involving a seven-stage acidizing operation at 176℃and 97.32 MPa,demonstrated a reliable sealing and stable performance of the sliding sleeve.The successful implementation of this experiment approach provides a new technique for stability testing of stage tool under high-temperature and high-pressure conditions.

关 键 词：裸眼封隔器 滑套 胶筒 密封性 高温 高压 老化腐蚀 实验装置 

分 类 号：TE357[石油与天然气工程—油气田开发工程]