Measures Of Oilfield Development And Optimization Of Hypotonic Block The Ocean

The development of low-median permeability fault-block reservoirs is important potential for the stable development of petroleum industry.To do a good job of water injection in ocean low-median permeability fault-block reservoirs has important significance for improve reservoir recovery.Not only the fluid flow in low-median permeability fault-block reservoirs affected by threshold pressure gradient,but also the areal sweep efficiency is affected by reservoir heterogeneity and complex boundary conditions. In addition, whether the reservoirs can establishment a effective injection-production system or not in large well spacing, the degree of water flooding reserves of current well pattern,how to adjust the well pattern and what is the optimal development mode are the challenges faced by the development of low-median permeability fault-block reservoirs.This paper regard X oilfield as a research object, combined with the method of hydraulics, reservoir engineering and numerical simulation, this paper carry out the following work and obtained the correspondence research results:①. Study on the seepage characteristics of X oilfield;②. This paper has deduced a formula to calculate the pressure gradient distribution in skewed pattern and combined this formula with the threshold pressure gradient to set up the relationship between plane using rate and differential pressure;③.Based on the minimum pressure gradient on the line between injection Well and production well to judgment whether the injection well and production well can establish a effective injection-production system or not.This paper calculate the longitudinal sweep efficiency and obtain the relationship between longitudinal sweep efficiency and differential pressure;④.Combined with the method of the hydraulics theory of low-median permeability fault-block reservoirs and numerical simulation method,this paper study the optimal well pattern and the optimal development mode,and applied the result to X oilfield;⑤. According to the current development of X oilfield and the research results of this paper to put forward the adjustment opinion.