Chelating agents were introduced because of the several issues associated with inorganic
acids during oilfield stimulation. Carbonate and sandstone rocks have been stimulated …

Formation damage has become a major obstacle to the efficient drilling and economic
development for tight carbonate reservoirs with multiscale pore system and plenty of …

Injection of acidic formulations into a carbonate reservoir is commonly used in the oil
industry to enhance or restore well productivity. The purpose of this method is to create …

The low permeability of coalbed methane (CBM) reservoirs can be attributed to cementing
minerals, which make it difficult for water/gas to flow in the pores and fractures. Acid …

Iron is one of the essential elements for crop growth. Traditional iron fertilizer application
method by injecting iron into soil results in low utilization efficiency of iron fertilizer and a …

Emulsification in the flowback fluid after the acidification of oil wells is too severe to be
treated by electric dehydration. To study the emulsification mechanism of acidified flowback …

As an important part of acid fracturing technology for the carbonate reservoir, the
performance of the acid system directly affects the stimulation effect. In view of the current …

Complex emulsifying systems based on acid have been widely used in petroleum
production. The advantage of these agents is that the rock dissolution rate is slow and the …

Acid stimulation of carbonates is the most common method of production intensification in
practice of hydrocarbon field development. Injection of acid compositions improves …

Calcium sulfate (anhydrite) exists in most of the carbonate reservoirs, and its content can
reach more than 20%. The high content of anhydrite affects the efficiency of the acidizing …