Hydraulic fracturing has been widely applied to stimulate the natural gas and oil production
from unconventional reservoirs. To optimize the design of hydraulic fracturing in this …

Understanding of hydraulic heterogeneity of the reservoir is the basis for Enhanced
geothermal systems (EGS) optimization. This, however, is challenging, as there are limited …

It is essential to evaluate the blasting-enhanced permeability (BEP) feasibility of a low-
permeability sandstone-type uranium deposit. In this work, the mineral composition …

Modified zipper fracturing in horizontal wells is an effective tool for promoting the energy
productivity of hot dry rock based enhanced geothermal system. However, the following two …

Impact cracks near the borehole are beneficial to geothermal energy development in many
aspects, such as hydraulic fracturing, perforation and so on. However, the quantitative …

Rock properties near the wellbore are particularly important for the development of
geothermal wells, but few people have studied them. The mechanical properties of granite …

In response to the issue of increased bottom-hole stress leading to higher rock strength and
reduced rate of penetration, a novel drilling technology has been proposed. This technology …

Microcracks have a significant effect on the physical and mechanical properties of rocks.
Inducing artificial microcracks in rocks can reduce rock strength and decrease the energy …

With advantages of high efficiency and low cost, DTH hammer drilling has been highly
applied in various drilling projects. When drilling in unconsolidated formations, it is prone to …

Reverse circulation impact drilling has the advantages of high drilling efficiency and less
dust, which can effectively form holes in hard rock and gravel layer. As integral reverse …