可取式液压封隔器耐高温胶筒优选与试验研究

Selection and Experimental Study of High Temperature Rubber for Retrievable Hydraulic Packer

近年来随着高温高压勘探开发技术的发展,西部油田井深逐渐增加,储层温度达到184～207℃,地层压力80～125 MPa,对井下工具的密封性能提出了更高的要求。胶筒元件作为井下封隔器实现井下封隔功能的核心部件,其性能的好坏直接影响井下工具的密封性能及工艺的成败。为此,对油田用高温高压密封材料及胶筒结构进行调研,优选出3款常用且性能指标较高的Ф193. 7 mm胶筒组件,根据要求对其结构及参数进行优化后,加工出3款胶筒样品;在模拟试验井筒内,分别对这3款封隔器胶筒进行高温条件下承压性能试验。试验结果表明:MESH双凹槽胶筒在耐温204℃条件下,长期耐压能够达到105 MPa,可以为后期研制性能达到105 MPa/204℃可取式封隔器提供密封胶筒。研究结果可为提高高温高压井开发效率提供技术支持。

With the well depth of the western oilfield has gradually increased, which puts higher requirements on the whose sealing performance of downhole tools. The rubber element is the core component of the downhole packer property directly affects the sealing performance of the downhole tool and the success of the operation. Through the investigation of oilfield high temperature and high pressure sealing materials and rubber element struc ture, three commonly used 193.7 mm rubber elements with highperformance are selected. The structures and pa rameters of the three rubber elements are optimized according to the requirements, producing three kinds of rubber element samples. In the testing wellbore, the pressure bearing capacity experiments were conducted using the three packer elements under high temperature. The test results show that the longterm pressure sealing capacity of the MESH double groove rubber element can reach 105 MPa under the temperature of 204 ℃, which can provide rub ber support for the future development of 105 MPa/204℃ retrievable packer, providing technical support for im proving development efficiency of high temperature and high pressure well.