Experimental Research on Proppant Transport Performance of GRF-CO₂ Fracturing Fluid

Abstract

In this article, the experimental study on proppant transport performance of GRF-CO2 system is performed by using the large-scale foam fracturing fluid test system of high temperature and high pressure, and critical settling velocity and proppant settling velocity are obtained.Research results show that the critical settling velocity increases with the temperature rising, in foaming cases,decreases with the foam quality and sand ratio rising.The correlations for GRF-CO2 fracturing final proppant settling velocity within solution and the critical settling velocity have been obtained, all kinds of average error is less than 14%.

Biomimicry Surface-Coated Proppant with Self-Suspending and Targeted Adsorption Ability

“…Particularly in China, the unconventional petroleum and gas resource is spectacular, which is about 240 × 10 8 t and 100 × 10 12 m 3 , respectively. Using proppants in the mining process can effectively improve the production of unconventional petroleum and gas. , However, previously reported coated proppants lost liquid conductivity quickly under higher pressure, leading to the necessity to develop coating proppants with high liquid conduction to meet the condition of complex and complicated cracks in shale rocks. A previous study indicated that the difficulty of mining is directly related to fracture conductivity of the proppant structure and the size as well as the complexity of the fracture network in unconventional petroleum and gas shale reservoirs .…”