{"id":1044,"date":"2020-10-25T21:02:30","date_gmt":"2020-10-25T18:02:30","guid":{"rendered":"https:\/\/adcr.ru\/?p=1044"},"modified":"2020-10-26T15:00:52","modified_gmt":"2020-10-26T12:00:52","slug":"2010-4-12","status":"publish","type":"post","link":"https:\/\/adcr.ru\/en\/2010-4-12\/","title":{"rendered":"\"REPORTER of the Association of Drilling Contractors\" N 4, 2010"},"content":{"rendered":"
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\"\"<\/strong><\/h3>\n

GEOPHYSICAL METHODS OF ASSESSMENT OF WELL CEMENTING QUALITY<\/strong><\/p>\n

Dmitry F. Novokhatsky \u2013 PhD in Engineering, professor, OJSC \u201cNPO \u201cBurenie\u201d,
postmaster@npoburenie.ru postmaster@npoburenie.ru<\/a>;
Alexander V. Krivoshey \u2013 PhD in Engineering, professor, OJSC \u201cNPO \u201cBurenie\u201d,
postmaster@npoburenie.ru postmaster@npoburenie.ru<\/a>.<\/em><\/strong><\/p>\n

Key words:<\/strong>cementing quality; geophysical surveys; quality coefficient; density of contact with pipe string and rocks; density of cement bond;\u00a0 cementing of casing string\u00a0 , eccentricity.<\/p>\n

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GEOPHYSICAL METHODS OF ASSESSMENT OF WELL CEMENTING QUALITY<\/strong><\/p>\n

Dmitry F. Novokhatsky \u2013 PhD in Engineering, professor, OJSC \u201cNPO \u201cBurenie\u201d, postmaster@npoburenie.ru<\/a>
Alexander V. Krivoshey \u2013 PhD in Engineering, professor, OJSC \u201cNPO \u201cBurenie\u201d, postmaster@npoburenie.ru<\/a><\/em><\/strong><\/p>\n

Key words: <\/strong>cementing quality; geophysical surveys; quality coefficient; density of contact with pipe string and rocks; density of cement bond;  cementing of casing string  , eccentricity.<\/p>\n

The article describes a method of casing cementing quality using geophysical survey techniques: cement bond logging, acoustic cement bond logging, selective gamma-gamma ray logging, downhole gamma ray density fault detection.  Provided are formulas for calculation of cementing quality coefficient based on cement bond logging data: density of contact with cement bond and casing  \u041ac, rock \u041ar, integrated coefficient of quality of density of contact with casing and rock; there is an example of assessment of quality of centering in a particular interval and wellbore as a whole, \u041aeco.  There are examples of grading of cementing quality using the K coefficient.   The qualitative assessment of the quality of cementing and centering is based on desirability function that is widely used for experimental data processing.<\/p>\n

 <\/strong><\/h3>\n

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