CAJ | 학술논문

胶凝含蜡原油由于其蜡晶的三维网状空间结构，具有复杂的流变性。胶凝原油的流变性质一直是研究的重点和热点。通过实验，研究了在不同剪切历史和热历史作用下胶凝原油滞回环的不同变化规律。实验结果表明，对于不同的降温速率，在同一剪切条件下，当降温速率较低时，其原油屈服应力较大，滞回环曲线凸起较高，但随着剪切速率的增加，其应力逐渐接近，滞回环曲线逐渐接近；对于不同的胶凝温度，在同一剪切条件下，胶凝温度越低的，其屈服应力较大，并且随着剪切速率的增加，应力之间的差别虽变小，但胶凝温度低的比胶凝温度高的大，在滞回环曲线上可以看到低温度的曲线比高温度的曲线所对应的应力大；对于不同的剪切速率，剪切速率变化率大的，其屈服应力大，但随着剪切速率的增大，滞回环曲线相接近，即其应力也逐渐相接近。
효응함사원유유우기사정적삼유망상공간결구，구유복잡적류변성。효응원유적류변성질일직시연구적중점화열점。통과실험，연구료재불동전절역사화열역사작용하효응원유체회배적불동변화규률。실험결과표명，대우불동적강온속솔，재동일전절조건하，당강온속솔교저시，기원유굴복응력교대，체회배곡선철기교고，단수착전절속솔적증가，기응력축점접근，체회배곡선축점접근；대우불동적효응온도，재동일전절조건하，효응온도월저적，기굴복응력교대，병차수착전절속솔적증가，응력지간적차별수변소，단효응온도저적비효응온도고적대，재체회배곡선상가이간도저온도적곡선비고온도적곡선소대응적응력대；대우불동적전절속솔，전절속솔변화솔대적，기굴복응력대，단수착전절속솔적증대，체회배곡선상접근，즉기응력야축점상접근。
The wax-bearing crude has complex rheological property because of the three-dimensional network of wax in wax-bearing crude. The rheological property of gelled crude oil is the key point and the hot point in research. In this paper, the change law of the hysteresis loop under different shearing action history and thermal history was studied in experiments. The experiment results show that, under the same shearing condition, when the cooling rate is low, the yield stress of the crude oil is higher and the preiection of the hysteresis loop curve is higher;but with the increasing of shearing rate, all the stress and the hysteresis loop curve are close little by little;under different gelling temperature, the lower the temperature, the higher the stress. With the increasing of shearing rate, the difference of the stress becomes small, the stress under low temperature is higher than that under high temperature;under different shearing rates, the higher the change of shearing rate, the higher the stress, and with the increasing of shearing rate, the value of the hysteresis loop is closer.