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Method for obtaining indication mark of oil layer through conventional logging

An oil layer indicator and conventional technology, applied in the field of obtaining oil layer indicator, can solve the problems of misjudging water layer as oil layer, interference, high porosity, etc., and achieve the effect of reducing cost

Inactive Publication Date: 2015-05-20
YANGTZE UNIVERSITY
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Problems solved by technology

[0002] Formation resistivity is one of the parameters reflecting the oil or gas content of the reservoir, but the vertical or lateral change of formation water salinity will cause the change of resistivity, which interferes with the judgment of oil and gas water layer: the influence of mud content makes the oil layer Resistivity decreases at the location, which interferes with the judgment of oil, gas and water layers: the borehole diameter expansion makes the porosity calculated by logging higher than the real porosity, which will misjudge the water layer as an oil layer

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  • Method for obtaining indication mark of oil layer through conventional logging
  • Method for obtaining indication mark of oil layer through conventional logging
  • Method for obtaining indication mark of oil layer through conventional logging

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Embodiment Construction

[0014] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments, but these embodiments should not be construed as limiting the present invention.

[0015] see figure 1 , the present invention obtains the method for oil layer indicating mark by conventional well logging, comprises the steps:

[0016] Step 1, read conventional well logging data from data file, described conventional well logging data comprises: depth (m), acoustic time difference (μs / m), borehole diameter (in or cm, in is inch), neutron ( %), density (g / cm 3 ), natural gamma ray (API), deep probe resistivity (Ω m), shallow probe resistivity (Ω m) and natural potential (mV);

[0017] Step 2, test and calculate the formation parameters of the local area, the formation parameters of the local area include:

[0018] Archie cementation index m,

[0019] Archie's constant a,

[0020] Formation water resistivity R w , R w Temperature correction...

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Abstract

The invention discloses a method for obtaining an indication mark of an oil layer through conventional logging. The method comprises the following steps that 1, conventional logging data are read from a data file; 2, stratum parameters of a local area are tested and computed; 3, the porosity phi is computed according to a logging curve; 4, the electrical resistivity of apparent formation water is computed; 5, the indication mark of the oil layer at a depth point is computed; 6, after computing of one depth point is finished, the first step is carried out again until computation of the whole depth section is finished. The method can effectively mark out the oil producing interval, is high in accuracy, obviously relieves the labor intensity of interpreters, and can be widely applied to the field of petroleum exploration and development.

Description

technical field [0001] The invention relates to petroleum exploration and development, in particular to a method for obtaining oil reservoir indicator marks through conventional well logging. Background technique [0002] Formation resistivity is one of the parameters reflecting the oil or gas content of the reservoir, but the vertical or lateral change of formation water salinity will cause the change of resistivity, which interferes with the judgment of oil and gas water layer: the influence of mud content makes the oil layer The resistivity at the place decreases, which interferes with the judgment of oil, gas and water layers: the borehole diameter expansion makes the porosity calculated by logging higher than the real porosity, which will misjudge the water layer as an oil layer. Contents of the invention [0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned background technology, and provide a method for obtaining oil la...

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Application Information

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IPC IPC(8): G06F19/00E21B49/00
Inventor 张超谟张泽宇张占松刘洪亮阚玉泉令狐松李军王晓畅
Owner YANGTZE UNIVERSITY
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