3results about How to "Improve heterogeneity" patented technology

The invention discloses a method for improving the fracturing crossing effect and the far-well end seam height, which comprises the following steps: determining a crossing position index according to a horizontal well track index, a reservoir minimum horizontal ground stress size index, a reservoir fracture toughness value index and a reservoir filtration coefficient index, selecting a crossing fracturing position, and segmenting to obtain a segmentation result; perforation, radial well guide reaming, fracturing and crossing of a reservoir where a horizontal well hole track is located and fracturing of a penetrated reservoir are carried out on the first crossing fracturing section; a multi-particle-size temporary plugging agent is added, the temporary plugging agent is pumped with medium-high displacement and high-viscosity fracturing fluid, normal-viscosity fracturing fluid is continuously injected in a high-displacement and step mode, and a propping agent is added in a step mode till a preset fracture height is reached; and a packing bridge plug is pumped to the position of the previous cross-layer fracturing section for the remaining cross-layer fracturing sections, setting is conducted, and cross-layer fracturing and pumping operation is repeated till cross-layer fracturing of all the sections is completed. The fracturing volume scale and the far-end crack height of the thin interbed horizontal well can be greatly improved.

This invention discloses a road safety analysis method and system for eliminating heterogeneity in traffic accident samples, relating to the field of road safety technology. Specifically, firstly, accidents are clustered according to their occurrence characteristics, forming groups with different attribute characteristics. Then, based on the safety influencing factors of the accidents, traffic safety models are performed on different groups. A safety analysis model is applied to obtain the influencing factors of traffic road safety in the affected area, and a safety evaluation of the area is conducted. Through the technical solution of this invention, a precise, comprehensive, objective, and truthful road safety evaluation method that reflects the impact data is provided, with a wider range of applications. In particular, clustering based on accident characteristics can amplify the heterogeneity between accident samples, better characterizing the impact of the same influencing factors on different accident groups.

The invention relates to a diene gel chemical blocking and channeling sealing agent. The problems that the plugging effect is poor and well cementation accidents are easily caused after an existing superfine cement system is solidified in large pore channel or crack plugging are mainly solved. The adhesive is characterized by comprising the following components in parts by mass: 8-10 parts of acrylamide; 1 to 3 parts of N, N-dimethylacrylamide; 5-6 parts of superfine silicate; 0.1 to 0.5 part of a dissolution promoter; 0.5 to 2.0 parts of a cross-linking agent; 0.1 to 0.3 part of an initiator; 0.1 to 0.2 part of a reinforcing agent and 78 to 85.2 parts of water; the preparation method comprises the following steps: sequentially adding the acrylamide, the N, N-dimethylacrylamide and the dissolution promoter into quantitative clear water according to the formula proportion of the agent, stirring, adding the cross-linking agent and the initiator, continuously stirring, adding the superfine silicate and the enhancer, and stirring and dissolving to obtain uniform liquid. The blocking and channeling sealing agent can improve the field working efficiency, the blocking effect is good after solidification, and well cementation accidents are not prone to being caused.