论文标题
通过断裂交叉口的支撑剂流量和运输动力学的实验研究
Experimental Investigation of Proppant Flow and Transport Dynamics Through Fracture Intersections
论文作者
论文摘要
本文研究了典型的与现有液压裂缝相交的相交裂缝相交裂缝中的支撑剂流量和转运。支撑剂是小的颗粒材料，在地热和碳氢化合物储层刺激期间被置于液压裂缝中，并在储层利用过程中支撑流体路径。这项研究使用了通过高级图像分析增强的有机玻璃实验室插槽实验，用于识别粒子轨迹和量化浆液速度。尽管已经广泛研究了支撑剂的流量和运输，但是相交裂缝角的影响尚未，尤其是与流体粘度，流速和支撑剂体积浓度效应相结合的效果。本文特别研究了中间断裂角的作用，这些角度被确定为当新的液压骨折拦截现有裂缝时最常发生。结果表明，交叉路口后的支撑剂流量和运输行为对携带流体粘度和流速改变非常敏感，而区分支撑剂体积浓度的效果有限。断裂交点角度本身对支撑剂流速和支撑剂沉降有明显的影响。此外，它增强了流体粘度，流体流速和支撑剂体积浓度的影响。
This paper investigates proppant flow and transport in intersected fractures at angles typical for intersections of pre-existing and new hydraulic fractures. Proppant is small granular material, which is placed into hydraulic fractures during geothermal and hydrocarbon reservoir stimulation and props the fluid paths open during reservoir exploitation. This study uses plexiglas laboratory slot experiments enhanced with an advanced image analysis for identifying particle trajectories and quantifying slurry velocities. Although proppant flow and transport has been broadly studied, the effects of intersecting fracture angles have not, especially coupled with fluid viscosities, flow rates, and proppant volumetric concentration effects. This paper specifically investigates the role of intermediate fracture angles, which have been identified to occur most frequently when the new hydraulic fractures intercept the existing ones. Results show that proppant flow and transport behavior after the intersection is very sensitive to carrying fluid viscosity and flow rates alteration, while differentiating proppant volumetric concentrations have a limited effect. Fracture intersection angle itself has a clear effect on proppant flow velocities and proppant settlement; furthermore, it enhances the effects from fluid viscosity, fluid flow rates, and proppant volumetric concentrations.
