2results about How to "Good foaming performance" patented technology

This invention relates to the field of oilfield development technology, specifically to a high-temperature resistant oil displacement foaming agent, its preparation method, and its application. The method involves first preparing a main agent solution containing a high-temperature resistant additive and a main agent, then adding a foam stabilizer for compounding, and finally maturing to obtain the high-temperature resistant oil displacement foaming agent. The main agent includes alkyl aryl sulfonate derivatives, the high-temperature resistant additive is an acrylamide derivative, a styrene derivative, or an organophosphonate, and the foam stabilizer is modified guar gum. The compounding temperature is 120-150℃, the reaction pressure is 0.3-0.5 MPa, and the time is 4-6 hours. This method achieves synergistic effects among the main foaming agent, modified guar gum, and organophosphonate, forming a stable system. This high-temperature resistant oil displacement foaming agent possesses excellent thermal stability and interfacial activity; it exhibits both excellent high-temperature and salt resistance and efficient foaming, foam stabilizing, and oil displacement effects under ultra-high temperature, ultra-high salinity, and high calcium and magnesium ion environments.

The application discloses a high-salt-resistant foaming agent, which can meet the requirements of drilling construction in complex strata by coping with harsh geological conditions in the process of foam drilling and multiple requirements of foam inhibition and foaming capacity. The foaming agent is composed of the following components in percentage by mass: 12-60wt% main foaming agent, 10-30wt% auxiliary foaming agent, and the balance of water. The main foaming agent is a betaine zwitterionic surfactant containing a polyether chain segment, and the auxiliary foaming agent is an amino propionic acid type zwitterionic surfactant. The foaming agent system prepared by the application has the advantages of temperature resistance of 140 DEG C, salt resistance of 360000mg / L NaCl, excellent foaming effect, good salt resistance and good inhibition effect on hydration of mud shale.