Productivity prediction is the core of oil and gas field development. Productivity well testing method and productivity prediction method are produced. In view of "Dense oil (gas) well testing analysis and productivity evaluation software development", a large number of domestic and abroad investigations have been carried out, through the research on the characteristics of dense oil (gas) and the existing productivity evaluation methods, on the basis of the existing productivity evaluation methods, combined with the actual characteristics of oil (gas) reservoir, a new concept of instantaneous productivity prediction based on pressure recovery well testing is put forward, the related software is developed and the exploration and development of dense oil are served.

Establishment of a dense oil (gas) well testing interpretation model:

The relationship between the seepage velocity and the displacement pressure is statistical analysis, and the non-linear seepage model of the dense reservoir is established. In addition, that method for explain the historical simulation method of the well testing pressure of the low-permeability reservoir is perfected.

The method of well testing interpretation for dense oil (gas).

Prediction of production capacity of dense oil (gas):

Due to the low well testing data loading of the dense oil during oil test, there are long-time production data, it helps a lot to the application of the later well testing analysis if the data is utilized well, which not only needs the constant pressure (production) prediction but also required the prediction of a well in which both the flow pressure and the production are reduced.

Dense oil (gas) well testing analysis and production capacity evaluation software development.

Dense oil and gas exploration and development in China are just in the initial stage, and there is no dense oil and gas well testing interpretation and analysis software in China. The software products have made technical innovations: Using PEBI grid division method to realize the fine modeling of multi-stage fracturing in horizontal wells, considering the influence of "Pseudo-starting pressure gradient" and "Pressure-sensitive effect" of multi-stage fracturing in horizontal wells, the calculation model of nonlinear seepage equation of dense oil is established, which improves the accuracy of multi-stage fracturing analysis results of horizontal wells. The combined after-pressure evaluation of fracturing fluid "Back flow, production and well testing data analysis" is realized, and the reliability of the evaluation effect of the scheme is improved.