CO_2相变点的激光测试

LASER TEST OF CO_2 PHASE CHANGE

油气生产过程是油气在地层压力的驱使下的渗流流动 ,地层流体的高压物性是很重要的参数。如何提高地层流体高压物性的测试准确度 ,对于地层流体高压物性的测试具有重要意义。运用激光测试理论 ,考虑气体处于气相和液相时消光截面的变化 ,导致透过气体的光强发生变化。建立了一套激光测试装置 ,在多个温度下对CO2 的露点进行了反复测试 ,结果与《HanbookofPhysicalPropertiesofLiquidsAndGases》手册中的标称值进行了对比 ,证明了测试装置具有很高的测试精度 。

The production of oil and gas is a process that the oil and gas fluid flow under high pressure in porous media. The high pressure property of stratum fluid is a very important parameter. How to increase the testing accuracy of the stratum fluid, it is an important significance for the test of formation fluid high pressure property. According to the testing theory of laser, it is considered that the change of the scatter section in gas and liquid phase led to the change of the intensity of light through the gas. We established a set of testing device of laser. The test equipment proceeded to test repeatedly at several temperatures, the results were compared with the Handbook of Physical Properties of Liquids and Gases, and it was proved that our results were more accurate than that of the Handbook. It provided the foundation to further study the phase change in the porous medium.