Sandstone matrix acidizing - an important oil-producing proppant technology

Sandstone described herein derived from classification geologic means of rock with a high quartz content. In addition to a clear quartz components, also contain other resin coated sand proppant minerals such as aluminosilicates, metal oxides, sulfur, chlorides, carbonates and amorphous silicate minerals, which is deposited in the original sediments mineral called debris. Most mineral water sensitive. When the fluid through the rock matrix, traction can transport these minerals, clogged pore throat.
Sandstone connate water contains many soluble natural mineral, which is due to the equilibrium resin coated ceramic proppant and partial pressure of dissolved gases (such as carbon dioxide) and the presence of other ions. As the fluid output, the pressure drop associated to break this balance and formation of normal saline ion content, and may block the formation of precipitation pore throat. This diagenesis produce it authigenic mineral species (such as calcium carbonate, and clay materials such as zeolite, illite, kaolinite and montmorillonite).
Many job well can lead to geological damage, for example, drilling and completion fluids often leak into the sandstone. Drilling and completion of the filtrate invasion can produce a completely different chemical environment, environmental acidification is carried out. Other formation damage can produce perforating, gravel packing, normal production and water injection job. Many pollutants and acid dissolution most mineral formations. Understand the chemical reaction of acid rock reaction is to choose the basis proppant type and proppant concentration.