SU661102A1 - Method of isolating water flow to oil well - Google Patents
Method of isolating water flow to oil wellInfo
- Publication number
- SU661102A1 SU661102A1 SU741997364A SU1997364A SU661102A1 SU 661102 A1 SU661102 A1 SU 661102A1 SU 741997364 A SU741997364 A SU 741997364A SU 1997364 A SU1997364 A SU 1997364A SU 661102 A1 SU661102 A1 SU 661102A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- water
- water flow
- oil well
- oil
- isolating water
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/502—Oil-based compositions
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Description
Изобретение относитс к нефтедобывающей промышленности, в частности к способам изол ции притока вод в скважины и зон поглощени .The invention relates to the oil industry, in particular, to methods for isolating water inflow into wells and absorption zones.
Известен способ изол ции воды в скважине путем закачки в пласт парафина, растворенного в углеводородах 1.There is a method for isolating water in a well by injection of paraffin dissolved in hydrocarbons 1 into the formation.
Способ недостаточно эффективен при изол ции вод с высокой минерализацией.The method is not effective enough to isolate waters with high mineralization.
Известен способ изол ции притока вод в нефт ную скважину путем закачки в обводненную часть продуктивного пласта углеводородной жидкости 2.There is a method for isolating the inflow of water into an oil well by pumping a hydrocarbon liquid 2 into the water-cut part of the reservoir.
Снособ не .может быть использован в скважинах с притоком вод различной минерализации .The method can not be used in wells with the influx of water of different salinity.
Целью изобретени вл етс повышение эффективности изол ции вод различной минерализации .The aim of the invention is to increase the efficiency of isolation of waters of various salinity.
Цель достигаетс тем, что одновременно с углеводородной -жидкостью в пласт ввод т серную кислоту в соотношении 1:1.The goal is achieved by the simultaneous introduction of sulfuric acid in the ratio 1: 1 into the formation along with hydrocarbon liquid.
Способ осуществл ют следующим образом .The method is carried out as follows.
Определ ют интервал притока воды из продуктивного пласта. Спускают насоснокомпрессорные трубы (НКТ) ниже интервала перфорации. После этого по НКТ заканчивают буферную жидкость в объеме 2- 3 м (например, дизтопливо), а затем концентрированную серную кислоту, а по заколонному пространству-безводную нефть в соотношении с кислотой. 1:1. После закачки расчетного объема нефти и кислоты повторно заканчивают буферную .жидкость и ведут продавку. Давление закачки подбирают таким образом, чтобы нефть и кислота поступали лишь в зону интервала притока воды . В пласте в результате .перемешивани нефти и серной кислоты образуетс высоков зка масса кислого гудрона. Одновременно с гудроном происходит образование гипса за счет химической реакции серной кислоты с карбонатными составл ющими скелета продуктивного пласта. По мере продавки в пласт кислоты и нефти происходит перемешивание гудрона и гипса и образование в пласте тампонирующего материала, который по мере увеличени его объема закупоривает пути водопритока и высокопроницаемые обводнивщиес участки пласта. Посл окончани продавки скважину до забо The interval of inflow of water from the reservoir is determined. Downpump pipes (tubing) below the perforation interval. After that, the tubing is finished with a buffer fluid in a volume of 2–3 m (for example, diesel fuel), and then concentrated sulfuric acid, and in the annular space — anhydrous oil in relation to the acid. 1: 1. After injection of the estimated volume of oil and acid, the buffer liquid is again terminated and displaced. The injection pressure is selected so that oil and acid flow only into the zone of the water inflow interval. In the formation, as a result of the mixing of oil and sulfuric acid, a highly acidic mass of acid tar is formed. Simultaneously with tar, the formation of gypsum occurs due to the chemical reaction of sulfuric acid with carbonate components of the skeleton of the reservoir. As the acid and oil are pumped into the reservoir, tar and gypsum mix up and formation of tamping material in the reservoir, which, as its volume increases, clogs the water inflow paths and highly permeable watering areas of the reservoir. After the completion of the well
промывают пластовой водой, трубы приподнимают от забо и скважину оставл ют на ожидание окончательного реагировани кислоты с нефтью, пластовой водой и карбонатами пласта.the reservoir is washed with water, the pipes are raised from the bottom and the well is left to wait for the final acid to react with the oil, formation water and formation carbonates.
Эффективность изол ционн 1х работ по предлагаемому способу не зависит от состава нефти и поступающей в скважину воды. Доступность и дешевизна матер,иалов, используемых при осуществлении способа позвол ют снизить стоимость проводимых операций . Способ может быть с успехом применен при изол ции подощвенной воды и при изол ции поглощающих и водопро вл ющих горизонтов при бурении скважин.The effectiveness of insulation 1x work on the proposed method does not depend on the composition of the oil and the water entering the well. The availability and cheapness of the mats, pots used in the implementation of the method allows to reduce the cost of operations. The method can be successfully applied for isolating sub-basal water and for isolating absorbing and water-bearing horizons when drilling wells.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU741997364A SU661102A1 (en) | 1974-02-15 | 1974-02-15 | Method of isolating water flow to oil well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU741997364A SU661102A1 (en) | 1974-02-15 | 1974-02-15 | Method of isolating water flow to oil well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU661102A1 true SU661102A1 (en) | 1979-05-15 |
Family
ID=20576161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU741997364A SU661102A1 (en) | 1974-02-15 | 1974-02-15 | Method of isolating water flow to oil well |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU661102A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2530006C1 (en) * | 2013-07-02 | 2014-10-10 | Открытое акционерное общество "Татнефть" имени В.Д. Шашина | Method of production string sealing |
-
1974
- 1974-02-15 SU SU741997364A patent/SU661102A1/en active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2530006C1 (en) * | 2013-07-02 | 2014-10-10 | Открытое акционерное общество "Татнефть" имени В.Д. Шашина | Method of production string sealing |
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