Analysis And Model The Impact Factors Of The Natural Decrease

Natural decline rate is the measure of a oil field development management level ofmain index, also is the key to complete the tasks of oil field of the annual production. Soit is an important task to achieve continuous and stable development in currentmaturing field. For a field or block, natural decline rate is related not only with theintegrant of production in some years ago but also with many factors such as theinjection-production adjustment measures, the old wells management and also on inthis year. In order to determine the influence of natural decrease in production, first weshould analysis theory, then application the theory to practical field development. Atpresent, many oil fields lack quantitative research in influence factors of the naturaldecrease, consequently, it is difficult to quantitative determination the main factorswhich affect the natural decrease.Since the1978, years Shanghe oil field experience initial development, adjustsubdivision of reservoir, primary and second well pattern thickening,and partialsubdivision and improvement in well groups in extra high water cut stage.According to Shuanghe oil field â…¥ oil group of the actual production conditions,first analysis of this block diminishing rationality, then respectively set up the model ofthe natural decrease with its influential factor, finally establish many factors and thenatural decrease integrated model, and presented technical countermeasures to slow thenatural decrease.It is the innovation points which use production data calculation relativepermeability and establish the theoretical model of diminishing in this paper.Now, Shuanghe oil field has been in extra high water cut stage, in order to ensurereservoir development in economic effectively, we must carry out technology researchin well nets adjustment to make sure the oil field better development. Especially oilfield is in serious deficiency of reserves, and the production zone is in the stage of lowyield, high water cut, and difficult to keep the stable production, so it is significancemeans to achieve the next step of domestic and foreign similar reservoir developmentthat carry out the "oil field â…¥ oil group the natural decrease the influence factors andthe control countermeasures study".