Research On The Seepage Characteristic And Injection-Production Parameters Of Fine Controlled Fractured Reservoirs In Xing-9 Block

The main body of Xingjiu Developed Area is hyposmosis thin and poor reservoir that has the characteristics of low permeability, poor reservoir physical property, strong anisotropism and bad natural energy supply. The second and third wells in Developed Area took the thin and poor reservoir with effective thickness less than 0.5m as major exploitation object, well pattern in production Wells composite water cut is high, the single well production is low. Well currently use situation under conditions have improved overall, but the use of condition of the thin and poor reservoir is still poor, the specific performance of a single sand body Injection-production imperfect, water flooding low degree of control and the use of thin and poor reservoir thickness and low problem. The outer layer of third well adopted current-limiting fracturing production before putting into operation, due to the influence of construction scale, crack interference, and difficult reservoir, the producing degree of oil reservoir was lower. Apply fine control fracturing can improve the producing degree of reservoir of the thickness of thin and poor reservoir, however, the validity period is short and the Decline Rate is large. Therefore, it is necessary to understand the percolation mechanism of thin and poor reservoir under the influence of fine control fracturing horizontal fracture so as to deeply research the percolation rule of thin and poor reservoir of fine control fracturing.This article aims to define the distribution character and physical characteristic of reservoir at Xingjiu Developed Area, and analyze the developing dynamic characteristic of typical fine control fracturing well groups and the problems in current fine control fracturing of thin and poor reservoir. According to the experimental principle of hydropower simulation, it reasonably formulated experiment plan and flow, carried out the physical simulation of percolation characteristic on fine control fracturing five-spot injection-production well group, and analyzed the percolation characteristic of thin and poor reservoir before and after fine control fracturing; thus, it understood the influences of different reservoir characteristics, fracture parameters and well patterns as well as spacing on reservoir percolation characteristic. By using the reservoir engineering method and numerical simulation method, it ultimately determined the reasonable injection-production parameters of thin and poor reservoir, such as flowing bottomhole pressure, injection-production ratio and injection-production pressure.The quantitative description of thin and poor reservoir percolation characteristic under different influencing factors plays instructive role in in-depth research of percolation mechanism and guidance of production practice. According to the impact fracturing of fine control of the flow characteristics instruct the implementation of fine control fracturing, extend measure validity, and provide technical support for governing low-yielding and inefficient well.