Study On Optimization Of Water Injection Well 2005 Area In Xingzichuan Oil Field

In this paper, the xingzichuan oilfield xing 2005 well Chang 4+5 and Chang 6 reservoir layer is the research object, through the analysis of the stratigraphic division and structural features of the study area study, the distribution of sand body, reservoir physical property of reservoir description method to determine the reservoir characteristics and types. And through the study of the reservoir layer water injection development percolation characteristics to determine the main factors influence the results of water flooding development, the use of waterflood development technology policy related techniques in the study area for the water injection optimization of.Studies have shown that xingzichuan oilfield xing 2005 well Chang 4+5 and Chang 6 reservoir layer belongs to low porosity and super low permeability reservoir, the types of reservoir porosity is secondary porosity, intergranular dissolution pores and throat types are mainly for necking shape. The characteristics of the pore throat were characterized by fine pore, micro fine throat, short throat and narrow throat.. The storage layer through the study on seepage characteristics of results show that, the storage layer of the oil-water two-phase flow range is narrow, partial hydrophilic, and there starting pressure gradient and nonlinear percolation feature by stress sensitivity tests showed that the pressure change has little effect on the porosity of the reservoir, but the reservoir seepage rate is very large, and is irreversible. According to the reservoir pressure sensitive problem, the reasonable production pressure difference and the pressure reduction rate of the oil well are maintained.. The advanced water injection is used to establish the effective displacement pressure, and the reservoir physical properties can be improved and then put into operation.. Through the damage test of water lock, it is shown that the lower permeability reservoir does exist the water lock effect, the lower the reservoir permeability, the more serious water lock damage.. By injecting fluid and formation fluid combined with experimental results, the well area of injected mifepristone of the presence of water and formation water, injection of mifepristone in water in the stratum will mainly produce precipitation, it is recommended in the injection station to join the main to precipitate the anti scaling agent, to minimize the incompatibility of fouling of formation damage. Through all kinds of test results, and ultimately determine the various factors affecting waterflooding, suggest the area with advanced water injection combined with surface active agent flooding of oil development investment, through the injection production well pattern optimization, injection pressure parameter optimization technology on the water flooding in the area of overall optimization and has carried on the forecast to the xing 2005 well long-term water flooding development indexes.