高温液压旋转井壁取心仪的研制与应用  

Design and Application of a Hydraulic Rotary Sidewall Coring Tool at High Temperatures

作　　者：魏赞庆[1] 田志宾[1] 杨庚佳 彭嘉乐 WEI Zanqing;TIAN Zhibin;YANG Gengjia;PENG Jiale(China Oilfield Services Limited.,Beijing,101149,China;School of Energy and Power Engineering,Huazhong University of Science and Technology,Wuhan,Hubei,430074,China)

机构地区：[1]中海油田服务股份有限公司,北京101149 [2]华中科技大学能源与动力工程学院,湖北武汉430074

出　　处：《石油钻探技术》2023年第3期73-82,共10页Petroleum Drilling Techniques

基　　金：中国海洋石油集团有限公司科技项目“测录试关键技术与装备”子课题4“电缆地层取样技术与装备”(编号:YJB22YF003.04);国家科技重大专项“大型油气田及煤层气开发”课题4“超低渗地层测试技术与装备”(编号:2017ZX05019-004)资助。

摘　　要：为解决勘探井获取深地层岩心困难的问题,研制了一种最高工作温度达205℃、具有高可靠性的液压旋转井壁取心仪。该取心仪由地面系统、控制采集短节和机械液压节组成,并采用一体式保温瓶技术、被动式热管理技术和解卡技术,提高了取心仪的耐温性和工程安全性。通过模拟仿真和地面测试,验证了这些关键技术的功能。现场试验结果表明,该取心仪可在189℃高温高压环境、钻井液相对密度和地层压差较大的探井正常作业,平均岩心收获率大于90%,且具有耐高温、防压差卡钻、取心时效和岩心收获率高的特点,尤其是对存在扩径、缩径和井壁垮塌等问题的井段具有良好的适应能力和较高的安全可靠性。Since it is difficult to obtain stratigraphic cores in deep exploration wells,a hydraulic rotary sidewall coring tool with a maximum operating temperature of 205℃ and high reliability was developed.The coring tool is composed of a ground system,a control acquisition short section,and a mechanical hydraulic section,and adopts an integrated thermos bottle technology,passive thermal management technology,and stuck-freeing technology,which effectively improve its temperature resistance and engineering safety.The performance of these key technical functions was verified through simulation and ground tests.The actual operation results show that the tool can operate normally in exploratory wells with a high temperature of 189℃ and high pressure,high relative density of drilling fluid,and large formation pressure difference,and further,the average core recovery rate exceeds 90%.In addition,it has the characteristics of high temperature resistance,stick and jam prevention,and high coring efficiency and core recovery rate and shows excellent adaptability and high safety and reliability in solving problems in complex well sections,such as hole enlargement,hole contraction,and borehole collapse.

关 键 词：岩心 旋转井壁取心 一体式保温瓶 热管理 解卡技术 岩心收获率 

分 类 号：TE921.3[石油与天然气工程—石油机械设备]