调流剂颗粒在裂缝中的输送实验与数值模拟

Experiment and numerical simulation of transport behavior of flow-regulating particles in fracture

巫光胜 张涛 钱真 韩琦2

中国石化西北油田分公司石油工程技术研究院，新疆 乌鲁木齐 830011 西南石油大学石油与天然气工程学院，四川 成都 610500

Reserch Institute of Engineering Technology, Northwest Company, SINOPEC, Urumqi 830011, China College of Petroleum Engineering, Southwest Petroleum University, Chengdu 610500, China

通过实验和数值模拟方法，研究了低密度调流剂颗粒在碳酸盐岩缝洞型油藏裂缝中的运移沉降规律。在平板裂缝模型中开展不同携带液黏度和密度的调流剂颗粒输送实验，利用高清摄像机观测颗粒在裂缝进口和远端流场中的流动特征，以及砂堤的堆积位置和高度。为了能够量化颗粒输送过程中的运动参数，建立了基于CFD?鄄DPM的颗粒输送模型，并进行流体和颗粒相的双向耦合模拟，量化了在注入速度、携带液密度和黏度、颗粒直径等因素作用下调流剂颗粒的速度和沉降距离，进而得到了各因素与颗粒流的沉降剖面和颗粒沉降百分比之间的关系。

In this paper, experiment and numerical simulation are applied to study the transport and settlement law of flow-regulating particles with low density during the injection process in the fracture-vuggy carbonate reservoirs. The parallel plate experiment is conducted under different rate, fluid viscosity and particle density conditions. Meanwhile, by using a HD camera, the transport characteristics of the particles around the inlets and remote fluid field as well as position and height of the sandbed are investigated. Moreover, to quantify the motion parameters of particles, the simulation model of particle transport based on CFD-DPM method is established and the bi-directional coupling simulation of fluid and particle phase is completed. As a result, the characteristic parameters including velocity and settling distance are quantitatively analyzed under different flow conditions such as inlet velocity, fluid density, fluid viscosity and particle size, to obtain the relation between flow parameters and settling profile and particle settling ratio.

10.6056/dkyqt201805028