Method for confirming oil drainage front edge with consideration of starting pressure gradient
A technology of starting pressure gradient and front edge, which is used in earth-moving drilling, surveying, wellbore/well components, etc., can solve the problem of low permeability, difficult to obtain data of radial flow characteristics, and difficult to accurately obtain effective formation permeability and other problems, to achieve the effect of huge economic benefits
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[0016] In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments are listed below and described in detail in conjunction with the accompanying drawings.
[0017] Such as figure 1 as shown, figure 1 It is a flow chart of the method for determining the oil drainage front considering the start-up pressure gradient of the present invention.
[0018] In step 101, multiple formation physical and fluid parameters are obtained according to the logging interpretation results, well completion geological reports, and high-pressure physical property analysis reports. In one embodiment, the multiple formation physical and fluid parameters include porosity Φ, formation effective thickness h, water saturation S w , oil saturation S o , well radius r w , oil volume coefficient B o , formation oil compressibility C o , formation water compressibility C w . Among them, the parameter porosity Φ is a decimal, ...
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