渤海钻探二固井公司自研科技成果获国家发明专利

Core Viewpoint - The development of a new high-strength low-modulus water-soluble resin cement slurry by the Bohai Drilling Second Cementing Company has received national invention patent authorization, providing an innovative solution to enhance cementing quality and ensure long-term stability of oil and gas wells [1][2]. Group 1: Technology Development - The new cement slurry is designed with a unique resin-cement synergistic approach, addressing the urgent industry need for a cementing system that can withstand the demands of deep and complex formations [1]. - The technology utilizes a curable epoxy-based resin as a fluid that can penetrate the micro-gaps in cement stone, forming a three-dimensional network structure that significantly enhances interfacial bonding strength [1]. Group 2: Performance Improvement - Field applications have demonstrated that the new technology improves the bonding strength at the dual interfaces of cement stone with casing and formation by over 60% compared to conventional systems [2]. - The compressive strength is stabilized while the elastic modulus is reduced by more than 30%, effectively eliminating micro-gaps caused by stress changes in the formation [2]. - The quality rate of cementing has increased to over 95%, fundamentally improving the integrity and stability of the wellbore seal [2]. Group 3: Practical Application - The technology has been successfully applied in over 20 wells in the Su20 and Su76 blocks, validating its adaptability and practical utility in the field [2].