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Method for measuring clay minerals relative content in quasi clastic rock gap filler

A clay mineral, relative content technology, applied in the direction of material analysis using radiation diffraction, etc., can solve problems such as inability to correctly evaluate reservoir sensitivity characteristics

Active Publication Date: 2009-06-17
PETROCHINA CO LTD
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Problems solved by technology

Therefore, directly using the X-ray diffraction analysis data of sedimentary rock clay minerals leads to the inability to correctly evaluate the reservoir sensitivity characteristics

Method used

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Experimental program
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Embodiment Construction

[0027] Specific steps:

[0028] (1) Firstly, according to the Petroleum and Natural Gas Industry Standard SY / T5368-2000 of the People's Republic of China for rock thin section identification, kaolinite K=4%, sandstone intergranular clay mineral E=1% and plastic cuttings B=5% were respectively identified percentage content.

[0029] (2) According to the relative content X-ray diffraction analysis method of the petroleum and natural gas industry standard SY / T5163-1995 of the People's Republic of China, the clay minerals composed of plastic cuttings and mud matrix (represented by adjacent mudstone) are respectively analyzed kaolinite, The relative percentages of illite, green smectite and illite smectite.

[0030] Take kaolinite K1=10% as an example.

[0031] (3) Calculate the percentage content A of all clay minerals in sandstone (including plastic cuttings and mud matrix)

[0032] A=K+E+B=4+5+1=10%

[0033] (4) Calculate the content A1 of plastic cuttings and matrix in sand...

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Abstract

The invention relates to a method for determining a relative content of a clay mineral in a clastic rock and a filling. The method comprises the following steps: firstly, identifying the clay mineral and plastic rock debris among sandstones according to a rock slice identification standard of the petroleum and natural gas industry standard SY / T5368-2000; analyzing the relative percentage contents of various clay minerals according to the relative content of the clay mineral in sedimentary rock in the standard SY / T5163-1995; respectively obtaining absolute percentage contents of the clay mineral in the clastic rock, the filling and a mud matrix, obtaining the absolute contents of the plastic rock debris and the mud matrix kaolinite in the clastic rock, and respectively obtaining the total weight of kaolinite in the rock clay mineral and the relative content of the kaolinite in the filling; finally, obtaining the relative content of the clay mineral of the clastic rock above that of the filling. The method can help accurately determine the relative content of the clay mineral in the clastic rock and the filling, and correctly evaluate sensitivity property of reservoir beds.

Description

technical field [0001] The invention relates to a method of correcting and directly using the X-ray diffraction analysis method to determine rich plastic debris (including phyllite, slate, mica, hydrated, muddy tuff, lava debris, and syngenetic debris) ) method to determine the relative content of clay minerals in clastic rock interstitials. Background technique [0002] The relative content analysis method of clay minerals in sedimentary rocks currently used in China is based on the Petroleum and Natural Gas Industry Standard SY / T 5163-1995 "X-ray Diffraction Analysis Method for Relative Content of Clay Minerals in Sedimentary Rocks" as the background technology. [0003] The disadvantage of this method of analysis is that when sandstone is separated from clay, the sample is crushed to a particle size of less than 5 mm. In this process, the plastic debris composed of illite, illite (I / S), chlorite, and chrysanthemum, which are crushed and soaked during the sample preparati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/20
Inventor 张丽霞李培俊李民王国先朱跃胜
Owner PETROCHINA CO LTD
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