The Shape Factor Study And Application For Fractured Reservoir

Fractured reservoirs were possessed of considerable proportionment in gas-oilresource, but it's very difficult to empolder. Besides the difficulty in cognition,distributing prediction and quantificational token for fracture, the more seriousdifficulty is study for fracture seepage mechanism and model.This paper has taken into account the coarse degree of fracture surface and theflexural degree of liquid channel. At the same time, the kernel factor has been study inthis paper. Study indicated that the different shape factor could decide the differentflow mode. The constant shape can be used to solve non-compressible liquid, and thetime-dependent shape factor is very useful for compressible liquid. Someachievements have been exhibited as follows by productivity prediction and testingexplain.1) The influence of the coarse degree of fracture surface and the flexural degree ofliquid channel for liquid was substituted by tortuous degree. The relationship hasbeen existed between tortuous degree and fracture permeability, and theinfluence of circuitous degree for shape factor has been analyzed in this paper.2) The constant shape factor and time-dependent shape factor for 1-Dim, 2-Dim and3-Dim have been deduced. Studies indicate that the time-dependent shape factoris valid method to solve compressible liquid that could be steadied in a long time.3) Author has analyzed the influence of constant shape factor and time-dependentshape factor for matrix average press and accumulative flux in this paper. Andwe can understand it's significance for exploitation of fracturing reservoirs.4) This paper have studied the productivity of fracture reservoirs, analyzed theinfluence of all factor for productivity, and drawn the productivity theory plate offracture reservoirs. According to the application for Zhuang-xi oil field, thetheory result is consistent with the actual data of oil field. Having Studied theproductivity prediction of compressible liquid with time-dependent shape factor, and analyzed the influence of time-shape factor for productivity.5) The influence and meaning of shape factor that used in the testing have beenindicated in this paper. The choice of shape factor is very sensitive to theapplication of plate. The size of fracture space lies on the shape factor, which isvery important to the choice of grid size in the testing.