It is known that the parameters of the perforation depth, the
perforation density, the perforation phase angle, the anisotropy of each phase of the
formation, the radius of the perforation hole and so on, the production capacity of the
actual oil and gas well is calculated, and the skin factor (the perforation skin, the
damaged skin, the total skin) are also given.
Given a certain perforating gun, the perforation optimization
design is carried out, that is, with known perforation depth, the anisotropy of the
formation and the radius of the perforation hole, calculate the productivity of oil and gas
wells with different perforation density, phase angle and format, so as to select the scheme
with best economic benefit.
The parameters like the perforation depth are known, the
three-dimensional pressure distribution under the unstable condition is calculated, the
numerical value of the bottom hole pressure varies with time of the slug flow or the
self-production well under the unstable condition is calculated and the curve is plotted,
And calculating the value of the section plug flow bottom hole flowrate over time and
drawing a curve.
The parameters of perforation depth and so on 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 given.
Optimized perforating technology based on the guaranteed wellbore
safety, the p-t curve is obtained by the explosion calculation of the perforating bullet in
different loading, different pore density and different perforation format, and the safety
pressure of the casing is calculated to achieve the purpose of process design optimization.