Based on the typical oil sands of the 45° angle reservoir somewhere in Gansu province as the research object, an experimental model with the application of sodium hydroxide, sodium dodecyl benzene sulfonic acid and anionic polyacrylamide as the triple component ASP displacement agent was investigated using local oil sands as samples. The asp flooding on the secondary development of 45° angle oil sands reservoir effect after hotwater flooding was tested, and the changing laws of sweep area for displacement agent, flooding effect and production of different direction horizontal well were also studied. The results showed that, displacement agent flowed to transverse area and affected area increased significantly, making the oil sands recovery improved for 18.91%, and production of the horizontal well which parallel to inclination of the reservoir is higher.

In recent years the multilateral horizontal well plays a more and more important role in the development of low permeability oil and gas reservoir, which is the effective method to exploit shale reservoir and tight sandstone reservoir. In order to further improve the yield, hydraulic fracturing cracks could be used to increase oil and gas production of multilateral horizontal well. Based on the water and electricity resembling principle, the experiment inspected the crack length, osmotic conditions，branch number, the influence of horizontal segment of the openhole and closed conditions. The results show that there existed the optimal length of cracks and the yield of each branch horizontal well was different|there existed yield differences between openhole completion and closure completion under the conditions of the same branch.