Oilfield displacement agent.when the oilfield cones into tertiary recovery period,single waterflodding oil displacement method,since its flow rate is higher than that of the underground crude oil it drives,will greatly reduce its spreading efficiency and increase water consumption,and greatly increase the water content of the crude oil collected.in addition,nonuniformity of oil pool’s geology will also reduce the spreading efficiency.for special oil layer of positive rhythm deposition.upper thick and lower thin,lower part permeability higher than the upper part.when displacing oil by single waterflooding,it usually spreads along the bottom,while leaving large amount of crude oil in the upper part the oil layer undisplaced,using polyacrylamide which can increase the viscosity of water in stead of single waterflooding will help to improve the spreading efficiency and reduce water content of crude oil,increase oil production.our company’s partial hydrolysis polyacrylamide fully meets up with requirements of oilfield’s tertiary recovery(EOR)users can select to use according to different characters of different oilfield such as formation temperature,mineralization,viscosity of polymer solution injected and etc.
Drilling mud is a fluid of appropriate physical and chemical characteristics, which can be air or gas, water, oil and water and oil combinations with different solids. It should not be toxic, corrosive or flammable, but inert to contaminants. The partially hydrolyzed PHPA is a polymer of high molecular weight anionic synthetic that is designed to inhibit clays to hydrate prone, leading to instability of the hole. The excellent condition of the hole experienced with the PHPA mud can be determined from a series of tests to confirm the quality thereof and in the case of water-gel and lignosulfonate mud, the polyacrylate is subjected to a study of the which include the determination of density, rheological properties, condition alkalinity or basicity.
Partially hydrolyzed polyacrylamide (PHPA) is a copolymer, substance formed when two or more substances are polymerized simultaneously, resulting in a product that is not a mixture of individual polymers, but a complex which has different properties from each polymer by separated. The PHPA case we refer to a polymer of high molecular weight whose main function is likely to inhibit shale hydration. The primary mechanism of inhibition is the polymeric encapsulation of the clay or shale perforated by attraction and anionic / cationic adhesion (oppositely charged). The resulting effective encapsulation prevents hydration of the hole and cuts. This polymer layer also protects the cuts to be made into thinner before or during the process of being separated from the solid mud system. The anionic high molecular weight polymers act as flocculants in low concentrations by binding many particles of clay. When concentrations are increased, the solids may be fully encapsulated, and the long chain polymer can act as deflocculant to prevent clays interact directly with each other.
Furthermore, the high molecular weight partially hydrolyzed polyacrylamide serving as viscosifier and encapsulant, and low molecular weight polyacrylate which acts as a thinner or flocculant. This polymer works best in water. It is stable at a temperature of 300°F. It is sensitive to PH and loses its effectiveness when the alkalinity is increased. It works well when you have a PH between 8.5 and 9.5; Calcium concentration less than 100 ppm. These polymers are highly thixotropic shear thinning properties. Polyacrylamide is also used as viscosifier casualties.