SU1265297A1 - Method of identifying producing oil-bearing formations while drilling - Google Patents
Method of identifying producing oil-bearing formations while drilling Download PDFInfo
- Publication number
- SU1265297A1 SU1265297A1 SU853883133A SU3883133A SU1265297A1 SU 1265297 A1 SU1265297 A1 SU 1265297A1 SU 853883133 A SU853883133 A SU 853883133A SU 3883133 A SU3883133 A SU 3883133A SU 1265297 A1 SU1265297 A1 SU 1265297A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- oil
- increase
- microns
- drilling
- optical density
- Prior art date
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 7
- 230000015572 biosynthetic process Effects 0.000 title claims 2
- 238000000034 method Methods 0.000 title abstract description 6
- 238000005755 formation reaction Methods 0.000 title 1
- 230000003287 optical effect Effects 0.000 claims abstract description 15
- 239000003921 oil Substances 0.000 claims abstract description 13
- 239000012530 fluid Substances 0.000 claims abstract description 5
- 238000010521 absorption reaction Methods 0.000 claims abstract description 4
- 239000010734 process oil Substances 0.000 claims abstract description 3
- 238000002329 infrared spectrum Methods 0.000 claims abstract 3
- 230000015556 catabolic process Effects 0.000 claims abstract 2
- 238000011010 flushing procedure Methods 0.000 claims abstract 2
- 238000005070 sampling Methods 0.000 claims abstract 2
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 abstract description 5
- 238000005259 measurement Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 4
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
- 238000000862 absorption spectrum Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
СПОСОБ ВЬЩЕЛЕНИЯ ПРОДУКТИВНЫХ НЕФТЯНЫХ ПЛАСТОВ В ПРОЦЕССЕ БУРЕНИЯ , заключающийс в поинтервальном отборе проб промывочной жидкости на устье скважины с прив зкой их по глубине и измерении оптической плотности характеристических полос поглощени в их ИК-спектре, отличающийс тем, что, с целью повьшгени достоверности вы влени продуктивного нефт ного пласта в разрезе бур щейс скважины, определ ют дискретно дл каждой пробы прсмывочной жидкости величину отношени оптической плотности, соответствующей длине волны 14,93 мкк, продуктивного нефт ного пласта к разности оптических плотностей, соответствующих длинам волн 5,85 мкм, характерi ной дл технологической нефти, и г (Л 14,93 мкм, и по увеличению этой величины отношени по сравнению с предшествующей пробой суд т о прохождении продуктивного нефт ного пласта.THE METHOD OF SUBSTITUTING PRODUCTIVE OIL STRUCTURES IN THE DRILLING PROCESS, consisting in the interval sampling of the washing fluid at the wellhead with depth reference and measurement of the optical density of the characteristic absorption bands in their IR spectrum, characterized by the fact that, in order to increase the reliability, the absorption bands in their IR spectrum, differing from the oil reservoir in the section of the drilling well, determine discretely for each sample of the flushing fluid the value of the ratio of the optical density corresponding to a wavelength of 14.93 microns, oil density to the difference in optical densities corresponding to a wavelength of 5.85 µm, characteristic of process oil, and g (L 14.93 µm, and to increase this value of the ratio compared with the previous breakdown, reservoir.
Description
елate
NDND
Изобретение относитс к исследовани м скважин в процессе бурени , в к вьщелению продуктивных нефт ных пластов в процессе бурени This invention relates to well studies during drilling, and to the distribution of productive oil reservoirs during drilling.
Цель изобретени - повьшение достоверности вы влени продуктивных интервалов в разрезе бур щейс скважины.The purpose of the invention is to increase the reliability of detection of productive intervals in the section of a drilling well.
Способ реализуетс следуюпрм образом ,The method is implemented in the following manner,
Через определенные интервалы бурени на устье скважины отбирают пpqбы выход щей из нее промывочной жидкости, провод т экстракцию нефти селективным растворителем, например четыреххлористым углеродом, центрифугируют полученную смесь дл отделени экстракта и очистки от взвеси глины. На спектрофотометре или полевом ИК-анализаторе с набором сменных оптических фильтров измер ют оптические плотности спектра ИК-поглощени , соответствующие длинам волн 14,93 и 5,85 мкм. Определ киг величину отношени оптическойплотности при 14,93 к разности оптических плотностей, соответствующих длинам волн 5,85 и 14,93 мкм дл данной пробы. Сравнивают полученную величину отношени с величинами отношений, полученных дл предшествующих проб. В случае увеличени отношени дл данной пробы по сравнению с ранее полученнымн значени ми суд т о прохождении продуктивного пласта. Дл количественной оценки нефтесодержани продуктивного интервала целесообразно определ ть суммарную концентрацию нефти в каждой пробе промьшочной жидкости по величине оптической плотности полосы поглощени с максимумом при 3,42 мкм. Увеличение концентрации нефти в промывочной жидкости при незначительном изменении величины отношени оптических плотностей свидетельствует об обогащении порции промывочной жидкости пластовой нефтью.At certain intervals of drilling at the wellhead, they are taken out of the washing liquid coming out of it, the oil is extracted with a selective solvent, such as carbon tetrachloride, and the mixture is centrifuged to separate the extract and remove the clay from the slurry. The spectrophotometer or IR field analyzer with a set of interchangeable optical filters measures the optical densities of the IR absorption spectrum corresponding to a wavelength of 14.93 and 5.85 µm. Determine the kig value of the ratio of optical density at 14.93 to the difference in optical densities corresponding to a wavelength of 5.85 and 14.93 µm for a given sample. Compare the obtained ratio value with the ratio values obtained for the previous samples. In the case of an increase in the ratio for a given sample compared to the previously obtained values, the production reservoir is judged. In order to quantify the oil content of the production interval, it is advisable to determine the total oil concentration in each sample of industrial fluid based on the optical density of the absorption band with a maximum at 3.42 µm. An increase in the concentration of oil in the washing liquid with a slight change in the value of the ratio of optical densities indicates the enrichment of a portion of the washing liquid with reservoir oil.
Пример. Дл осуществлени предлагаемого способа провод т исследовани скважины. Величина отношени оптической плотности при длине волны 14,93 мкм к разности оптических плотностей, соответствующих . длинам волн 5,85 и 14,93 мкм дл случа фонового содержани в промывочной жидкости технологической нефти, составл ет 1,024. .По увеличению величины отношени , которое сост авл ет 3,,219, фиксируют прохождение продуктивного пласта. Измерени провод т полевым ИК-анализатором с набором сменных оптических фильтров . Толщина кюветы 0,2 мм. Методом газового каротажа пласт не бьш зафиксирован .Example. For the implementation of the proposed method, well studies are conducted. The magnitude of the ratio of optical density at a wavelength of 14.93 µm to the difference in optical densities, corresponding. the wavelengths of 5.85 and 14.93 microns for the case of background content in the washing liquid of the process oil is 1.024. .In increasing the value of the ratio, which is 3,, 219, record the passage of the reservoir. The measurements are carried out by a field IR analyzer with a set of interchangeable optical filters. The thickness of the cuvette is 0.2 mm. The gas logging method was not recorded.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU853883133A SU1265297A1 (en) | 1985-04-12 | 1985-04-12 | Method of identifying producing oil-bearing formations while drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU853883133A SU1265297A1 (en) | 1985-04-12 | 1985-04-12 | Method of identifying producing oil-bearing formations while drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU1265297A1 true SU1265297A1 (en) | 1986-10-23 |
Family
ID=21172729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU853883133A SU1265297A1 (en) | 1985-04-12 | 1985-04-12 | Method of identifying producing oil-bearing formations while drilling |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU1265297A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2356030C2 (en) * | 2003-05-22 | 2009-05-20 | Шлюмбергер Текнолоджи Бв | Method of processing signals resulted from optical analysis of fluid medium |
-
1985
- 1985-04-12 SU SU853883133A patent/SU1265297A1/en active
Non-Patent Citations (1)
| Title |
|---|
| Киселев С.Б. и Моисеенко А.С. Обнаружение нефти в промывочной жидкости скважины методом инфракрасной спектрометрии. - Автоматизаци и телемеханизаци нефт ной промышленности. 1978, № 1, с. 9-10. * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2356030C2 (en) * | 2003-05-22 | 2009-05-20 | Шлюмбергер Текнолоджи Бв | Method of processing signals resulted from optical analysis of fluid medium |
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