论文部分内容阅读
文章针对某高温高压含蜡凝析气井在开采过程中是否存在石蜡沉积展开实验评价研究 ,利用自行开发的固溶物沉积实验激光测试系统 ,测试了脱气油在不同压力下的析蜡温度和溶蜡温度。结果表明 ,脱气油的析蜡温度和溶蜡温度随压力降低基本呈直线下降 ,析蜡温度比溶蜡温度低 10～ 2 0℃ ,升温溶蜡曲线滞后于降温析蜡曲线 ,说明蜡一旦析出 ,更难溶化。该井压力在 0 .10～ 6 0MPa ,脱气油的析蜡温度在 38～ 4 9℃ ,溶蜡温度在 5 2～ 6 3℃ ,因此在地层中不会出现石蜡沉积 ,同时 ,只要井口温度不低于 38℃ ,井筒中也不会出现石蜡沉积。一旦有蜡析出 ,采用热清蜡技术的加热或热油温度必须高于 70～ 80℃。在常压下 ,粘温曲线法和密度温度曲线法测试的析蜡点与激光法接近。实验还发现 ,脱气油石蜡结晶在一定温度范围内具有触变性 ,表观粘度呈现出无规律的变化 ,这是因为结晶石蜡所形成的网状结构较弱 ,持续剪切使结晶石蜡网状结构容易被破坏。
In this paper, a waxy condensate gas well in a high temperature and pressure waxy gas well in the mining process whether there is paraffin deposition experiment evaluation study, the use of self-developed solid solution deposition experimental laser test system to test degassing oil waxing temperature under different pressures and Melting wax temperature. The results showed that the waxing temperature and waxing temperature of degassed oil decreased linearly with the decrease of pressure. The waxing temperature was 10 ~ 20 ℃ lower than the melting temperature, Precipitation, more difficult to melt. The pressure of the well is between 0 and 10 MPa, the waxing temperature of the degassing oil is between 38 and 49 ° C, and the temperature of the melting wax is between 52 and 63 ° C, so that paraffin deposition will not occur in the formation. At the same time, The temperature is not lower than 38 ℃, the paraffin deposit will not appear in the wellbore. Once the wax is precipitated, the heating or hot oil temperature using hot wax technology must be above 70-80 ° C. At atmospheric pressure, the viscosity-temperature curve method and the density of the temperature curve test waxing point close to the laser method. The experiment also found that degassed paraffin crystals have thixotropy within a certain temperature range, the apparent viscosity showed a random change, it is because the crystalline paraffin wax formed by the network structure is weak, continuous shear crystalline paraffin mesh Structure is easily damaged.