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Method and device for forecasting reservoir yield
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A prediction method and reservoir technology, applied in the field of petroleum geological exploration, can solve problems such as large errors in prediction methods, and achieve the effect of improving accuracy
Inactive Publication Date: 2010-12-08
PETROCHINA CO LTD
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[0004] The main purpose of the embodiments of the present invention is to provide a method and device for predicting reservoir production capacity to solve the problem of large errors in conventional production capacity prediction methods in the prior art
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Embodiment 1
[0032] Embodiments of the present invention provide a method for predicting reservoir productivity, such as figure 1 As shown, the method includes:
[0033] Step 101, obtaining formation parameters including formation pressure and fluidity according to the formation and fluid property information obtained by the cable formation tester;
[0034] Step 102, according to the flow process of the fluid from the bottom of the well to the wellhead, the wellhead pressure and the bottom hole flow pressure are obtained;
[0035] Step 103, generating natural production of bottomhole fluid according to formation parameters, skin coefficient, bottomhole flow pressure, and conventional logging information including oil well supply radius, wellbore radius, formation effective thickness, and fluid volume coefficient;
[0036] Step 104, obtaining fluid parameters including gas-oil ratio and fluid density according to the fluid property information;
[0060] An embodiment of the present invention also provides a reservoir productivity prediction device, which is preferably used to implement the above method. Such as image 3 As shown, the device includes:
[0061] A formation parameter acquisition unit 301, configured to acquire formation parameters including formation pressure and fluidity according to the formation and fluid property information obtained by the cable formation tester;
[0062] The wellhead bottomhole pressure acquisition unit 302 is used to acquire the wellhead pressure and the bottomhole flow pressure according to the flow process of the fluid from the bottom of the well to the wellhead;
[0063] Bottomhole fluid natural production unit 303, used to generate bottomhole fluid according to formation parameters, skin coefficient, bottomhole flow pressure, and conventional logging information including oil well supply radius, wellbore radius, formation effective thickness, and fluid volume coefficient natu...
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Abstract
The invention provides a method and a device for forecasting reservoir yield, wherein the method comprises the following steps of: acquiring stratum parameters including stratum pressure and fluidity according to the stratum and fluid property information which is acquired by using a cable type stratum tester; acquiring well head pressure and well bottom flowing pressure according to the flowing process of a fluid from a well bottom to a well head; generating the natural yield of a well bottom fluid according to the stratum parameters, skin coefficients, the well bottom flowing pressure and conventional well logging information comprising the oil supplyradius and the well bore radius of an oil well, the effective thickness of a stratum and the volume coefficient of the fluid; acquiring fluid parameters comprising a gas-oil ratio and a fluid density according to fluid property information; generating the yield of a well head fluid according to the well head pressure, the well bottom flowing pressure and the fluid parameters; acquiring a well head optimum coordination capacity according to the natural yield of the well bottom fluid and the yield of the well head fluid; and forecasting the reservoir yield according to the well head optimum coordination capacity. By using the invention, the forecasting precision of the reservoir yield can be greatly improved.
Description
technical field [0001] The invention relates to the field of petroleumgeological exploration, in particular to a method and device for predicting reservoir productivity. Background technique [0002] At present, the reservoir production prediction method is mainly the conventional production capacity prediction. This method calculates key parameters such as formation pressure, formation effective permeability, and formation fluidviscosity in the new area through regression or empirical methods based on existing data, so as to achieve the purpose of production prediction. [0003] However, this conventional production capacity forecasting method only predicts based on existing data, although it is economical and fast, it has large errors. Contents of the invention [0004] The main purpose of the embodiments of the present invention is to provide a method and device for predicting reservoir production capacity, so as to solve the problem of large errors in conventional pr...
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