Multiwell deconvolution application in the inverse solution of underground hydrodynamics

Abstract

Multiwell deconvolution allows to select a specific reaction to a change this or other well operation processes of a particular well and to obtain interpretation it in traditional methods. When using multiwell deconvolution opportunity appears to evaluate and to take account of noise effect on the pressure curve. In addition this approach greatly simplifies the interpreting of the curve since it allows to more easily and reliably diagnose the interpretative reservoir model. A new approach to the construction of the self-influence function and influence functions is proposed namely their representation as the sum of the elementary functions that characterize individual filtration modes in the reservoir. The influence of the wellbore storage is represented as an exponent, the bilinear flow is in the form of a fourth root, the linear flow is in the form of a square root, the radial flow is in the form of a logarithm, the influence of boundaries is in the form of a linear function. With this approach, the coefficients of the functions of influence and self-influence are represented linearly, so the Newton method can be used to determine them. This method was tested using the synthetic pressure curve. When achieving a good fit of simulated and deconvoluted pressure curves, it was found that the given in the simulation and received in the interpreting of synthetic and deconvoluted pressure curves parameters of the reservoir were match almost identically so this proposed approach is very effective.