By a good number of experiments, the dynamic law of natural water imbibition injection and pressure-pulse water imbibition injection for Da'anzai low permeability fracturing reservior were obtained, which can provide theoretical and.

Determination of the scheme and parameters of coal seam water injection in large-scale full-mechanized caving;

Physicochemical properties of magnetized water are analyzed and the mechanism of coal seam injection of magnetized water is studied by theoretical analysis in order to increase effect of coal seam water injection in this paper.

Based on the results of the experiments in Yaoqiao Coal Mine and the data obtained in laboratory, the water injection properties of coal seam are determined, the suitable method and parameters of coal seam water injection designed, and the opimum concentration of wetters is achieved.

Technology of separate layer water injection on inclined shaft in Nanpu Oilfield

A new type separate layer water injection and testing technology was put forward to use in high angle deviated hole.

The quality of layering water injection is up to stealing state of packer under layering water injection well in direct,and it influences on the effectiveness of water injection seriously in the oil field.

Concrete actions include that conception design for initial production is made, local well pattern adjustment is carried out during stable production, layering water injection is conducted, well pattern is reconstructed at production decline period a.