SU817231A1 - Method of determining flooding intervals of a producing formation - Google Patents
Method of determining flooding intervals of a producing formation Download PDFInfo
- Publication number
- SU817231A1 SU817231A1 SU792767419A SU2767419A SU817231A1 SU 817231 A1 SU817231 A1 SU 817231A1 SU 792767419 A SU792767419 A SU 792767419A SU 2767419 A SU2767419 A SU 2767419A SU 817231 A1 SU817231 A1 SU 817231A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- intervals
- producing formation
- flooding
- determining
- oil
- Prior art date
Links
- 238000000034 method Methods 0.000 title description 6
- 230000015572 biosynthetic process Effects 0.000 title description 5
- 241000566515 Nedra Species 0.000 claims 1
- 239000011229 interlayer Substances 0.000 claims 1
- 239000012530 fluid Substances 0.000 description 4
- 238000005755 formation reaction Methods 0.000 description 4
- 238000005553 drilling Methods 0.000 description 3
- 239000013505 freshwater Substances 0.000 description 3
- -1 for example Substances 0.000 description 2
- 230000003472 neutralizing effect Effects 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004927 clay Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Geophysics And Detection Of Objects (AREA)
Description
(54) СПОСОБ ОПРЕДЕЛЕНИЯ ИНТЕРВАЛОВ ОБВОДНЕНИЯ ПРОДУКТИВНОГО ПЛАСТА(54) METHOD FOR DETERMINING INTERVALS OF WATER SUPPLY INTERVALS
Способ осуществл етс в следующей последовательности/The method is carried out in the following sequence /
Продуктивные разрабатываемые пласты, в которых предполагак1|Т присутствие заводненных пресной водой интервалов, вскрывают при бурении скважины с промывкой забо непбл ризующей диэлектрической жидкостью, например буровым раствором на нефт ной основе. В качестве такого раствора может быть использован состав, содержащий 70% обессоленной нефти и 30% глинопорощка. Могут быть применены и другие аналогичные растворы. После подъема инструмента исследуемый интервал скважины, в котором имеютс продуктивные пласты, заполн ют непол ризующейс диэлектрической жидкостью, например буровым раствором на нефт ной основе, и провод т измерение потенциалов собственной пол ризации ПС в интервале продуктивных пластов. Дл создани электрического контакта между измерительным электродом 5 и горной породой электрод прижимают прижимным устройством 4. Электрод 5 соединен жилой кабел 6 с измерительным гальванометром 7, наход щимс на поверхности. По знаку и величине скачка потенциалов собственной пол ризации, зарегистрированной в процессе измерени , определ ют интервалы пласта, заводненные пресными закачиваемыми водами.Productive development layers, in which the presumption of freshwater watered intervals is assumed, are opened when drilling a well with flushing a non-flashing dielectric fluid, for example, oil-based drilling mud. As such a solution can be used a composition containing 70% desalted oil and 30% dry mud. Other similar solutions may be used. After the tool is lifted, the test interval of the well, in which there are productive formations, is filled with a non-neutralizing dielectric fluid, for example, oil-based drilling mud, and the potentials of self-polarization PS are measured in the interval of productive formations. To create an electrical contact between the measuring electrode 5 and the rock, the electrode is pressed by the pressing device 4. The electrode 5 is connected to the living cable 6 with the measuring galvanometer 7 located on the surface. The sign and the magnitude of the potential jump of its own polarization, recorded during the measurement process, determine the intervals of the reservoir flooded by the fresh injected water.
При заполнении ствола скважины непол ризующей жидкостью отсутствует ЭДС пол ризации в системе скваЖинна жидкость - горна порода. Благодар этому изменение потенциала ПС происходит на границе пластов с равной литологией (глиНаресчаник ), а в пределах продуктивного пласта - на границе сред с различной концентрацией солей в одной фазе, например на границе нефтеносного и заводненного пресной водой интервала пласта. Эпюры изменений потенциала ПС против нефтеносныхWhen the wellbore is filled with non-neutralizing fluid, there is no emf of polarization in the wellbore fluid – rock system. Due to this, the PS potential changes at the boundary of the strata with equal lithology (GlyNaverschanik), and within the reservoir at the boundary of media with different salt concentrations in the same phase, for example, at the boundary of the oil-bearing and freshwater-watered interval of the reservoir. Plots of changes in PS potential against oil-bearing
И заводненных интервалов пласта песчаника и глинистых пластов показаны на фиг. 2 и 3. Предлагаемый способ позвол ет, определ ть интервалы пласта, обводненные пресной водой, по отрицательной аномалии ПС по отнощению к уровню глин, а нефтеносные интервалы выдел ют по положительным значени м ПС по отнощению к уровню глин. Кроме того, применение предлагаемого способа позвол ет повысить точность выделени интервалов пласта, заводненных пресными водами, особенно в том случае, когда обводненный интервал находитс в середине продуктивного пласта.And the flooding intervals of the sandstone and clay beds are shown in FIG. 2 and 3. The proposed method makes it possible to determine the intervals of the reservoir flooded with fresh water, by the negative PS anomaly relative to the level of clays, and oil-bearing intervals are distinguished by positive PS values relative to the level of clays. In addition, the application of the proposed method makes it possible to increase the accuracy of the separation of the formation intervals flooded by freshwater, especially in the case when the watering interval is in the middle of the producing formation.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU792767419A SU817231A1 (en) | 1979-04-09 | 1979-04-09 | Method of determining flooding intervals of a producing formation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU792767419A SU817231A1 (en) | 1979-04-09 | 1979-04-09 | Method of determining flooding intervals of a producing formation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU817231A1 true SU817231A1 (en) | 1981-03-30 |
Family
ID=20828237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU792767419A SU817231A1 (en) | 1979-04-09 | 1979-04-09 | Method of determining flooding intervals of a producing formation |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU817231A1 (en) |
-
1979
- 1979-04-09 SU SU792767419A patent/SU817231A1/en active
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