A Quick Calculation Method for Non-uniform Oil-Water Contact Reservoir Reserves

A technology for calculation of oil-water interface and reserves, applied in design optimization/simulation, special data processing applications, etc., can solve problems such as adaptability and deviation between the results of rapid calculation of reserves and the actual situation, so as to achieve good operability and reduce uncertainty Sexuality and risk factor, the effect of improving applicability

CN106777524BActive Publication Date: 2020-03-17CHENGDU NORTH OIL EXPLORATION DEV TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2020-03-17

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Abstract

The invention discloses a quick calculation method of oil reserves of non-uniform oil-water interfaces and solves problems that oil reserves are divided into reserve calculation units of multiple secondary uniform oil-water interfaces to be evaluated leading to larger difference between results of quick reserve evaluation and actual situation in existing quick reserve evaluation of non-uniform oil-water interfaces. The method includes: dividing longitudinal reserve calculation units; performing oil-water interface quantitative description according to oil-water interface distribution characteristics of different well zones of the oil reserves of the non-uniform oil-water interfaces; delineating the extent of oil reserves at all levels of the reserve calculation units, determining reserve calculation parameters and performing reserve calculation. The quick calculation method has the advantages that applicability of the reserve calculation method in non-uniform oil reserves is increased, and effect of accuracy and the like in the oil reserve calculation of the type is improved.
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Description

technical field

[0001] The invention relates to the field of reserve evaluation and calculation of oil reservoirs, in particular to a quick calculation method for reserves of non-uniform oil-water interface reservoirs. Background technique

[0002] Oilfield oil and gas geological reserves calculation and research run through the entire life cycle of oilfield exploration and development. However, in the initial stage of oilfield exploration and development or during the acquisition and evaluation of oil and gas resource projects, limited by the degree of data collection and research time, it is impossible to obtain rich seismic, Well logging and other single well data make it impossible to carry out 3D geological modeling of reservoirs and detailed evaluation of reserves. Therefore, the rapid evaluation of reserves is an important research content in the initial stage of oilfield exploration and development and in the evaluation process of oil and gas resource project acquisi...

Examples

Embodiment

[0059] Such as figure 1 As shown in , a fast calculation method for non-uniform oil-water contact reservoir reserves, including:

[0060] On the basis of the comparative study on the sub-layer division of the reservoir, analyze the relationship between the sub-layer reservoirs and interlayers to divide the reserve calculation unit; The interface description method is used to quantitatively describe the oil-water distribution range; according to the quantitative description results of oil-water distribution, combined with the delineation principle of the oil-bearing area range of reserves at all levels, the calculation range of reserves at all levels is determined; the effective thickness, porosity, and original oil-bearing area of ​​each reserve calculation unit are counted and calculated. Reserve calculation parameters such as saturation, original crude oil volume factor, and gas-oil ratio; finally, the volumetric method is used to calculate the reserves of each reserve calcu...