Neutral blocking remover composition for oilfield oil extraction and preparation method thereof

Abstract

The invention relates to a neutral blocking remover composition for oilfield oil extraction, which is prepared from the following components in parts by weight: 30-35 parts of acrylic acid-methyl acrylate copolymer, 44-50 parts of diethylene triamine pentaacetic acid, 30-35 parts of sodium polyepoxysuccinate, 30-35 parts of amine malate, 10-14 parts of sodium alkyl sulfonate, 5-8 parts of amine hydroxy ethylidene diphosphate, 10-14 parts of hydrolyzed polyacrylamide, 12-17 parts of atlapulgite, 20-25 parts of sodium persulfate, 7-10 parts of sodium lignosulfonate, 5-8 parts of tannin, 12-16 parts of sodium malate, 5-8 parts of sodium sulfosuccinate, 5-8 parts of starch, 9-12 parts of methyl lactate, 0.2-0.3 part of vanadium pentoxide and 0.1-0.3 part of diisobutyl carbinol. The neutral blocking remover composition for oilfield oil extraction has the advantages of high blocking removal speed, no corrosivity due to neutrality and no dead area, can quickly dissolve the material scales, clean the oilfield stratum and remove blocking, and does not generate the phenomenon of precipitation or secondary blocking; and the cleaning waste liquid does not need to be subjected to sewage treatment after returning to the ground.

Description

Technical field [0001] The present invention involves a subsidiary used by petroleum oil fields, especially an oil field of oil fields suitable for oil fields for oil fields. The present invention also involves the preparation method of oilfield oil recovery neutral solution composition. Background technique [0002] Waterfield water injection development is an effective means to maintain strata pressure and increase harvesting. It has been widely used at home and abroad.However, the original balance of the oil layer caused during the water injection process was destroyed, and the problems caused by various oil layer caused by this also followed.Oil layer scaling is a common type of oil layer damage during water injection development.The main reason for the scaling of the oil field is that the injecting water in the oil field is not compatible with the water and the strata water, which causes the dirt in the water in the water to meet with the dirt in the strata water.In the infu...

AI Technical Summary

Problems solved by technology

The crystal clusters grown in the original large channel make the fluid encounter greater resistance in its progress, which greatly reduces the permeability of the rock and seriously affects the recovery of crude oil

[0003] The use of ASP flooding system also causes fouling and clogging of reservoirs

Therefore, these inorganic salt scales, petroleum sulfonate scales of surfactants, and polymer scales will inevitably cause damage to the rock minerals of the oil layer, even serious damage, and the generated dirt will cause oil flow pores and throats in the formation to be blocked , affecting the recovery of crude oil

[0004] In order to alleviate the above-mentioned adverse effects, at present, acidification is mainly used to remove plugging, which is easy to produce scale and secondary sediments, resulting in secondary blocking of production wells and stuck oil pumps; Factors such as failure of the corrosion inhibitor, uneven emulsification of the corrosion inhibitor, or improper operation cause corrosion to the oil extraction equipment, etc.