彩票走势图

The perforation optimization system adopts component technology to develop and fully consider many complex factors. Through explosion and seepage calculation, the wellbore p - t curve and oil and gas well productivity are obtained, and the display and print of free combination graphics such as curve, chart, bitmap and so on can be realized. At the same time, the variation of bottom hole pressure, the change of flow rate can be calculated and the analysis of perforation sensitive parameters can be realized. According to the productivity calculation of oil and gas wells, the most economical and reasonable perforation scheme is optimized for conventional perforation, compound perforation and dynamic negative pressure perforation on the premise of ensuring the safety of wellbore.

The software is mainly used in oil field test production companies, downhole operation companies, oil production plant geological research institute and other units.

The process design: The numerical simulation of the composite perforation in different cases is carried out to obtain the wellbore pressure and the reagent combustion time to the peak pressure and the sustained action time of the pressure (p-t curve), the safety condition and the fracturing condition of the wellbore are determined, and the theoretical basis for the design of the perforation process is provided.

Steady-state capacity: The parameters such as perforation depth, the perforation density, the perforation phase angle, the anisotropy of each phase of the formation, the radius of the perforation hole, etc., are known, the productivity of the actual oil and gas well is calculated, and the skin factor (the perforation skin, the damaged skin, the total skin and so on) are given.

Transient production capacity: For dense oil and gas well, the production capacity is unstable, and the production capacity curves at different time are given.

Bottom hole pressure: Under the condition of known flow, the bottom hole pressure changes with time according to different geological conditions and production mode is calculated.

Calculate the output: Given the bottom-hole flow pressure, the change of the oil-gas well flow over time is calculated.

Perforation optimization: A certain perforating gun is given, and the perforation optimization design is carried out, namely, oil/gas well productivity with different perforation density, perforation phase angle and perforation format are calculated under the condition that the perforation depth, the anisotropy of each phase of the formation and the radius of the perforation hole are known, So as to select the best economic benefit perforation scheme.

Sensitive analysis: The parameters such as the perforation depth are known, and the curve of the flow over time under different pressures is calculated, and the effect of different perforation parameters on the perforation production ratio (sensitive parameter analysis) is also given.

Dynamic negative pressure perforation: Through the rapid absorption of the residual detonation energy in the well bore, the pressure in the well bore can be reduced instantly after the perforation, resulting in an instantaneous impact reflux, the flushing of the perforation tunnel and the surrounding compact belt of the channel, thereby releasing the compaction and improving the oil and gas well production.

Logging curve: The oil and gas section is determined according to the logging curve, and the perforation is carried out, and the perforation section and the logging curve are plotted on the same graph.