A study on opposite phase emulsion polymerization and performance of MDNC——a new gelling agent of acidizing fluid;

Summarize unconventional acidizing fluid compared to mud acid in sandstone formation;

Considering the characteristics of small pore throat radius, high mud content and tiny hole development in Niu 35 Block of Shengli Oilfield, the acidizing experiments in lab have been conducted by use of several kinds of acidizing fluids, including merchandise acid, hydrochloric acids and mud acid fluids with different concentrations.

The phenomenon of acid fingering in pad acid fracturing treatment directly affects acid distribution, effective distance, fracture conductivity.

This paper presents the selection standards of preflush and acidizing fluid used in deep acid-fracturing for high temperature carbonate reservoir.

Acid Fluid for Treating High-temperture Sandstone Formation Renchao

In consideration of the shortcomings of more dissolved clay, less dissolved quartz and poor matrix reconstruction effect in a conventional acid fluid used for water injector acidizing in Henan Oilfield at present, a new acidizing system is developed, which is composed of organic acid, fluore-salt and a series additive.

Due to multiple organic plugs such as bacteria,polymers and inorganic plug during the course of acid stimulation,which leading to un-desired efficiency of removing plug,a new prescription and technique that use ClO_2 and acid fluid together to remove plug is developed basing on a series of indoor experiments and studies.