Based on the wetting theory, the wettability between different kinds of asphalt and mixture has been studied. The adhesion work is calculated by the data of asphalt surface tension and contact angle test, and the quantitative evaluation of the wettability between the asphalt and mixture in different temperature is carried out through the data of the adhesion work. The results show that, the adhesion work data between the same kinds of asphalt and different kinds of mixture are close at the same temperature, and it will be quite different if the type of asphalt is changed. The data variation of the adhesion work between asphalt and mixture with temperature presents the conic relationship, and there is a maximum point in the curve. Therefore, asphalt and mixture can keep in an optimum wetting condition in the specific temperature. The greater the viscosity and the soft point of asphalt, the higher temperature is need for asphalt and mixture getting to the optimum wetting condition. If the type of asphalt is in the same, the temperature of its optimum wetting condition is close. The maximum point of the adhesion work represents the optimum wetting condition between asphalt and mixture, which can be used to guide the selection of the best mixing temperature for asphalt and mixture.

The formula and performance of the microemulsion that is applicable for development of low permeability reservoirs are studied. Based on the method of equation coefficient method, the microemulsion formula suitable for the low permeability reservoir of Chaoyanggou is determined by laboratory experiment as 1% mahogany sulfonate+1% butanol+1.38%

There are many sand and shale interbed in Daniudi gas field. Although the horizontal well exploitation can realize the maximum utilization of the single layer reserves, it is impossible to exploit several reservoirs in the longitudinal direction. A systematical and significant influencing the Daniudi gas field exploitation technology called layers penetration fracturing that between the pay zone He-1 and Shan-2 has been developed by associate with the characteristic of pay zone. The treatment parameter such as discharging rate and fluid viscosity also researched for the aim of proposing the treatment advice and optimal method in different conditions, in order to form the penetration principle and a technique that could identify controllable factors. Associated with the precise single well stress explanation results and well temperature monitoring, the layers penetration model and principle's reliability have been verified, which presented the steerable layers penetration fracturing treatment and parameter optimization method.

Taking the shallow heavy oil reservoir of Shawan group in 510 block at Chepaizi area of Xinjiang oilfield as the object of the research, mechanism of CO₂ assistant cyclic steam stimulation was analyzed a by method of PVT physical properties at high pressure. Against the problems of steam overlap, steam channeling and sand producing during development, the technology was applied at this block. Practical application results show that the average oil production increment is 206 tones and the water cut decrement is 23 percentage for treated well. Currently the accumulative oil increment is up to 6 792 tones and get profit of 15.64 million yuan. Therefore the technology of CO₂ assistant cyclic steam stimulation can obviously enhance development effect and have great practical guiding significance for similar oil reservoir block.

According to the characteristics of Hangjinqi Gas Field and the problems existing in exploitation, a calculation model was established by using OLGA software,then the optimization study on gathering process was carried out. The relative errors of the results calculated using the calculation model were less than 3%, so the actual operation conditions of the pipelines could be simulated accurately. Based on the calculation model, the amount of hydrate formation on high and low wellhead pressure, gathering distance with water and without water was calculated, respectively. The results showed that:The downhole choke, no wellhead heating, no alcohol injecting low pressure gathering process with water was most suitable for Hangjinqi Gas field, and it could resolve the problems of complex geomorphological conditions effectively, such as low point effusion, hydrate plugging, poor dehydration effect when liquid production was high at the early stage of high pressure gathering process. The single well entering station gathering distance was 6.5 km((DN80), two wells were 7 km(DN80-DN100) and three wells were 4 km(DN80-DN80-DN100).