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A method for obtaining potassium ion content in sandstone brine layer from well logging data

A technology of logging data and potassium ions, which is applied in the field of obtaining potassium ion content in sandstone brine layers from natural gamma ray spectrum logging data

Active Publication Date: 2016-06-01
EXPLORATION & DEV RES INST OFSINOPEC JIANGHAN OILFIELD +1
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Problems solved by technology

At present, there is no calculation method for calculating the content of trace elements including potassium ions in the brine layer from geophysical logging data

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  • A method for obtaining potassium ion content in sandstone brine layer from well logging data
  • A method for obtaining potassium ion content in sandstone brine layer from well logging data
  • A method for obtaining potassium ion content in sandstone brine layer from well logging data

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Embodiment Construction

[0053] In order to better understand the present invention, the content of the present invention is further illustrated below in conjunction with the embodiments, but the content of the present invention is not limited to the following embodiments.

[0054] Wells 3909.4-3911.8m and 3916.0-3922.4m of Senior 1 are a sandstone brine layer (see attached figure 2 ), the time difference of the two layers is 213~227μs / m, and the density is 2.52~2.45g / cm 3 . Select the density to calculate the porosity, by calculating the shale content V sh The average is 0.15, the average porosity is 9.6% and 9.8% (see the table below), and the salinity calculated by resistivity is 253.22g / L; then the functional relationship between the brine salinity and density in this area is used (see the appendix). image 3 ) to calculate the density of the brine layer, and the density of the brine layer is 1.153g / cm 3 ; the potassium skeleton value K of the sandstone ma =1.05%, potassium measurement K for ...

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Abstract

The present invention relates to the evaluation of brine grade in underground brine exploration and development, specifically a method for obtaining the content of potassium ions in a sandstone brine layer by using natural gamma ray logging. Property logging, physical logging, natural gamma ray spectrum logging; 2) Divide sandstone layer and pure mudstone, and calculate the shale content Vsh of sandstone layer; 3) Calculate sandstone layer porosity φ, and divide sandstone brine 4) Using the natural gamma ray spectrum logging data to obtain the total potassium content K in the sandstone brine layer, the potassium content Ksh in the pure mudstone near the sandstone brine layer, and the potassium content Kma in the dry sand layer near the sandstone brine layer; 5 ) to obtain the mass content of potassium ions in the sandstone brine layer. The invention is a brand-new method for calculating the potassium ion content in deep well brine, has high precision, and meets the logging interpretation requirements of the potassium ion content.

Description

technical field [0001] The invention belongs to the field of geological exploration, and relates to the evaluation of brine grade in underground brine exploration and development, in particular to a method for obtaining potassium ion content in sandstone brine layers by using natural gamma energy spectrum logging data. Background technique [0002] In the exploration and development of underground brine, after drilling the stratum by drilling, using the data obtained by logging to interpret the brine layer and evaluate the grade of brine (salinity and content of trace elements), it is an important work to carry out water testing in the next step. At present, it is very mature to use logging data to classify water layers of sandstone types, including the use of spontaneous potential (SP), natural gamma (GR), well diameter (CAL), photoelectric absorption cross-section index (PE) and other lithologic logging data. The sandstone layer is then divided into the water layer and the...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V11/00G01N33/00
Inventor 黄华张士万余嫦娥张连元
Owner EXPLORATION & DEV RES INST OFSINOPEC JIANGHAN OILFIELD
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