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A method for measuring the salinity of shale pore water

A pore water and salinity technology, applied in measuring devices, by removing certain components, weighing, material excitation analysis, etc., can solve the problem of difficult detection of shale pore water salinity, and achieve convenient and efficient. and accurate results

Active Publication Date: 2019-10-25
杨梓艺
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Problems solved by technology

[0010] In order to solve the problem that the salinity detection of shale pore water is difficult in the above-mentioned prior art, the present invention provides a method for quickly and accurately measuring the quality of pore water for shale drying and weighing, and then performing subsequent salinity calculation. method

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  • A method for measuring the salinity of shale pore water
  • A method for measuring the salinity of shale pore water
  • A method for measuring the salinity of shale pore water

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Embodiment

[0046] This embodiment is a method for measuring the salinity of shale pore water in the corresponding area when shale gas is exploited. The method of crushing-weighing-drying-weighing is used to measure the quality of rock sample pore water; Then use the method of drying-crystallization-redissolution to extract the inorganic salts of shale pore water, test the salinity, and calculate the salinity of the formation water in the shale pores. Since there is no need to measure parameters such as shale porosity and skeleton density, the calculation accuracy is improved and the test cost is reduced.

[0047] Specific steps are as follows:

[0048] First prepare shale samples, the shale samples are fresh shale cores, and prepare 3-5 plunger-shaped core samples for detection.

[0049] Then measure the pore water content in the prepared shale sample, crush the prepared shale sample, then weigh it and record it as M 1 ; Then place the pulverized shale sample after pulverization and we...

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Abstract

The invention discloses a method for measuring the mineralization of shale pore water. The method comprises the following steps: G1, a fresh shale core is collected as a shale sample; G2, the contentof pore water in the well-prepared shale sample is determined; G3, the solute of the pore water in the shale sample is extracted for obtaining the aqueous solution of the solute; G4, the content of ions in the aqueous solution is detected and the original salinity C water of the shale pore water is obtained by calculation. The invention provides the method which calculates the mineralization basedon the weight of the pore water, which is fast and accurately measured by weighing the shale before and after dried, thereby overcoming the problem in the prior art that the pore water cannot be directly discharged out due to the reason that the shale has bad permeability, and also avoiding the problem of using the microanalysis technique such as an electron probe, and the like that the measuredvalue is not accurate due to the reason that the water sample can not be obtained or the porosity of the shale sample is directly determined, so that the mineralization of the pore water in the shalesample can be more conveniently, efficiently and accurately obtained.

Description

technical field [0001] The invention belongs to the technical field of shale gas exploitation, and in particular relates to a method for investigating the salinity of shale pore water in the region before shale gas exploitation. Background technique [0002] Shale gas is a natural gas resource that can be exploited in shale formations, and China has relatively large recoverable reserves of shale gas. The formation and enrichment of shale gas has its own unique characteristics, and it is often distributed in thick and widely distributed shale source rock formations in the basin. Compared with conventional natural gas, the development of shale gas has the advantages of long mining life and long production cycle. Most of the shale gas produced is widely distributed, thick, and generally contains gas, which makes shale gas wells stable for a long time. Gas production rate. Shale gas refers to unconventional natural gas that occurs in organic-rich shale and its interlayers, mai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/04G01N21/73G01N30/96
CPCG01N5/045G01N21/73G01N30/96
Inventor 杨梓艺
Owner 杨梓艺
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