Reservoir classification method based on rock electricity parameters

A classification method, rock-electric technology, applied in electric/magnetic exploration, acoustic re-radiation, radio wave measurement system, etc., can solve problems such as difficulty in classification and evaluation of pore-structured sandstone reservoirs

Active Publication Date: 2014-10-15
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

[0022] In order to solve the problem of difficult classification and evaluation of sandstone reservoirs with complex pore structur...

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  • Reservoir classification method based on rock electricity parameters
  • Reservoir classification method based on rock electricity parameters
  • Reservoir classification method based on rock electricity parameters

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Embodiment Construction

[0080] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0081] The embodiment of the present invention provides a reservoir classification method based on rock-electricity parameters. On the basis of the derivation of the existing rock-electricity experimental theoretical model, the theoretical range and range of theoretical values ​​of rock-electricity experimental data under different pore structures are formed. Finally, the reservoir pore structure partitions on the F-Ф chart of lithoelectric data are formed. On this basis, using the logging data widely collected in oilfield production, combined with rock electrical experiment data and mercury intrusion capillary pressure curve data, the rock electrical method quantitative classification evaluation basis for common complex sandstone reser...

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Abstract

The invention discloses a reservoir classification method based on rock electricity parameters, and belongs to the field of hydrocarbon reservoir evaluation. The method is based on rock electricity experiment theoretical model deduction, a theoretical value range and a value trend of rock electricity experiment data of reservoirs under different pore structures are formed, and reservoir pore structure subareas on a rock electricity data F-phi plate are formed; and corresponding electrical logging data are utilized in combination with rock electricity experiment data and mercury injection capillary pressure curve data to determine rock electricity method quantitative classifications, and the method at least includes: Step 1) establishing a rock electricity method classification bases; Step 2) forming a classification plate; Step 3) establishing a quantitative classification evaluation basis; and Step 4) determining classification grades of the reservoirs. According to the reservoir classification method based on rock electricity parameters in the invention, by checking distribution of the rock electricity data on the F-phi plate and discovering that rock samples of reservoirs of different classes fall on distinguishable different subareas on the F-phi plate, continuous evaluation knowledge can be provided, and a verification effect is good.

Description

technical field [0001] The invention relates to the field of classification of oil and gas reservoirs, in particular to a method for classification of reservoirs based on rock-electric parameters. Background technique [0002] As an important means of petrophysical research, lithoelectric experiment mainly calculates the four key parameters in Archie's formula by measuring the parameters of rock porosity, resistivity and saturation, and then accurately calculates the formation oil and gas saturation. [0003] Complicated lithology (such as glutenite, etc.), low porosity and low permeability, and fractured reservoirs all have more complex pore structures than conventional sandstone reservoirs. This complex pore structure is manifested in the difference in seepage capacity of rocks under the same porosity conditions significantly. That is to say, the reservoir has complex microscopic anisotropy under the background of macroscopic heterogeneity. In the current stratum evaluat...

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Application Information

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IPC IPC(8): G01V3/00G01V3/38
CPCY02A90/30
Inventor 程道解万金彬李东平王娟龚守捍白松涛冯俊贵田扬
Owner BC P INC CHINA NAT PETROLEUM CORP
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