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Recognition method of lithology of sand-shale-carbonatite

An identification method and carbonate rock technology, applied in earthwork drilling, wellbore/well components, etc., can solve the problem that the automatic identification of sedimentary rock-carbonate rock cannot be realized, and the characteristic parameters of carbonate rock are not given, etc. problems, to achieve the effect of improving development efficiency, accurate lithology identification results and accurate identification

Pending Publication Date: 2019-06-25
CHINA PETROCHEMICAL CORP +4
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Problems solved by technology

However, this method does not give the characteristic parameters of carbonate rocks, and cannot realize the automatic identification of sedimentary rock-carbonate rock lithology.

Method used

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  • Recognition method of lithology of sand-shale-carbonatite

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Embodiment

[0051] The ZY-LLA laser lithology automatic identification instrument produced by Sinopec Zhongyuan Petroleum Engineering Co., Ltd. logging company is used. The identification instrument includes a controller, an industrial computer, a spectrometer, a laser, a sample stage and a power supply. The laser is connected to the sample stage through an optical fiber. The sample stage is connected to the spectrometer through an optical fiber, the spectrometer is connected to the input end of the controller through a data cable, the output end of the controller is connected to the industrial computer through a data cable, and the controller, the industrial computer, the spectrometer and the laser are respectively connected to the power source through a power cable; Place the cuttings sample on the sample stage. After starting the identification device, the controller controls the laser to emit high-energy laser light to irradiate the surface of the cuttings sample placed on the sample st...

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Abstract

The invention provides a recognition method of lithology of sand-shale-carbonatite. The method is characterized by comprising the following steps: S1) detecting the content of Si, Al, Ca and Mg elements in a to-be-detected rock debris sample; and S2) calculating the total content XSS of SiO2 and Al2O3 and the total content XLD of CaO and Mgo in the to-be-detected rock debris sample; and judging the lithology of the to-be-detected rock debris sample according to the XSS and the XLD. Compared with the prior art, the method provided by the invention has the beneficial effects that firstly, the content of the Si, Al, Ca and Mg elements in the rock debris sample is detected, and the data of the content of the XSS and the XLD is calculated, so that quick, automatic and accurate recognition of the sand-shale-carbonatite is realized; the defects existing in the prior art are overcome; the method is convenient to operate; a recognition result of the lithology is accurate; and the method is beneficial to the recognition of oil and gas resource reservoirs, can improve the exploration and development benefits of oil and gas resources, and guides safe and efficient well drilling construction.

Description

technical field [0001] The invention belongs to the technical field of oil and natural gas exploration and development, and particularly relates to a method for identifying the lithology of sand mudstone-carbonate rock. Background technique [0002] In the process of oil and gas exploration and development, sedimentary rock and carbonate rock strata are the main strata for the generation, migration and storage of oil and natural gas resources, and are affected by the different characteristics of the strata. rock formations are identified. Relevant geological theories show that sand mudstone is mainly composed of minerals such as quartz and clay, and the main component of oxide is SiO 2 and Al 2 O 3 , SiO in sand and mudstone 2 and Al 2 O 3 Carbonate rocks are mainly composed of dolomite and calcite, and carbonate rocks such as limestone and dolomite have a large content of CaO or CaO+MgO, and SiO 2 , Al 2 O 3 The equivalent content is generally less than 10%. Theref...

Claims

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Application Information

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IPC IPC(8): E21B49/00
Inventor 佘明军李油建万利夏相成王新玲何慧莹
Owner CHINA PETROCHEMICAL CORP
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