RU99111003A - METHOD FOR CLEANING A HORIZONTAL WELL FROM A SAND PLUG IN A CAPITAL REPAIR PROCESS - Google Patents
METHOD FOR CLEANING A HORIZONTAL WELL FROM A SAND PLUG IN A CAPITAL REPAIR PROCESSInfo
- Publication number
- RU99111003A RU99111003A RU99111003/03A RU99111003A RU99111003A RU 99111003 A RU99111003 A RU 99111003A RU 99111003/03 A RU99111003/03 A RU 99111003/03A RU 99111003 A RU99111003 A RU 99111003A RU 99111003 A RU99111003 A RU 99111003A
- Authority
- RU
- Russia
- Prior art keywords
- gas
- pressure
- wellbore
- coefficient
- reservoir
- Prior art date
Links
- 238000004140 cleaning Methods 0.000 title claims 6
- 238000000034 method Methods 0.000 title claims 3
- 239000007789 gas Substances 0.000 claims 8
- 238000005187 foaming Methods 0.000 claims 5
- 239000004576 sand Substances 0.000 claims 5
- 239000011261 inert gas Substances 0.000 claims 4
- 239000007788 liquid Substances 0.000 claims 4
- 239000002245 particle Substances 0.000 claims 4
- 239000006260 foam Substances 0.000 claims 3
- 239000012459 cleaning agent Substances 0.000 claims 2
- 239000007799 cork Substances 0.000 claims 2
- 230000005484 gravity Effects 0.000 claims 2
- 238000005086 pumping Methods 0.000 claims 2
- 230000001133 acceleration Effects 0.000 claims 1
- 238000005273 aeration Methods 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 239000012530 fluid Substances 0.000 claims 1
- 238000011010 flushing procedure Methods 0.000 claims 1
- 238000007373 indentation Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000004642 transportation engineering Methods 0.000 claims 1
Claims (1)
где Vж - объем порции пенообразующей жидкости, м3;
n - средняя величина коэффициента открытой пористости песчаной пробки;
F - площадь поперечного сечения призабойной части горизонтального ствола, закольматированного песчаной пробкой, м2;
ΔP - расчетная величина депрессии, Па;
ρг - плотность газа в пластовых условиях, кг/м3;
ф - коэффициент формы частицы, кольматирующих отложений, равный 1 для сферических частиц;
dn - максимальный диаметр частиц кольматирующих отложений, м;
μ - коэффициент вязкости газа при пластовых условиях, Па • с;
То - температура при стандартных условиях (ст.у.), 293 К;
zo - коэффициент сжимаемости газа при ст.у.;
Ро - давление при ст.у., 101325 Па;
Тпл - пластовая температура, К;
zпл - коэффициент сверхсжимаемости при пластовых условиях;
Re - критерий Рейнольдса для скорости потока газа, отвечающий скорости "витания" частиц кольматирующих отложений;
α - степень аэрации пены,
причем продавливание осуществляют инертным газом до фиксации скачка давления на устье скважины, а депрессию в стволе скважины создают снижением давления на устье до величины, определяемой по формуле
где Ру - давление на устье скважины при создании депрессии, Па;
Рпл - пластовое давление, Па;
ρж - плотность пенообразующей жидкости, кг/м3;
g - ускорение свободного падения, м/с2;
hж - высота столба пенообразующей жидкости, м;
γ - относительный удельный вес газа в стволе скважины;
hг - высота столба газа в скважине над уровнем пенообразующей жидкости, м;
Тср - средняя температура газа в стволе скважины, К;
Zcp - средний коэффициент сверхсжимаемости газа в стволе скважины,
причем транспортирование кольматирующих отложений на дневную поверхность осуществляют с помощью циркуляции дополнительной порции пены, подаваемой с устья скважины через гибкую насосно-компрессорную трубу, а затем при закрытом затрубном пространстве продавливают пену инертным газом в очищенный интервал продуктивного пласта под давлением, не превышающим давление опрессовки эксплуатационной колонны, производят допуск гибкой насосно-компрессорной трубы на длину очищенного интервала и при открытом затрубном пространстве продувают забой инертным газом, а по установленной длине допуска труб определяют цикличность процесса по зависимости
N = L/l,
где N - количество технологических циклов для полной очистки горизонтального ствола скважины, целые числа;
L - полная длина песчаной пробки, м;
l - длина участка горизонтального ствола скважины, очищенного от песчаной пробки, определяемая по длине допуска труб, м,
и при необходимости повторяют операции.A method of cleaning a horizontal well from sand plugs during the overhaul process, including pumping a cleaning agent and forcing it, creating a depression in the wellbore, taking out the clogging deposits and transporting them to the day surface by circulating a flushing agent, characterized in that a flexible pumping pump is additionally lowered into the well the compressor pipe and record the depth of descent, and as an cleaning agent use an inert gas injected through a flexible tubing under yes a phenomenon that does not exceed the pressure of the test casing, and a foaming fluid pumped through the annulus, the portion size of which is calculated by the formula
where V W - the volume of the portion of the foaming liquid, m 3 ;
n is the average value of the coefficient of open porosity of a sand plug;
F is the cross-sectional area of the bottom-hole part of the horizontal trunk, sealed with a sand cork, m 2 ;
ΔP is the calculated value of depression, Pa;
ρ g - gas density in reservoir conditions, kg / m 3 ;
f is the coefficient of the shape of the particles, colmatizing deposits, equal to 1 for spherical particles;
d n - the maximum particle diameter of the mudding deposits, m;
μ is the coefficient of gas viscosity at reservoir conditions, Pa • s;
T about - temperature under standard conditions (Art. U.), 293 K;
z o - gas compressibility coefficient at the station;
P about - pressure at Art., 101325 Pa;
T PL - reservoir temperature, K;
z PL - coefficient of supercompressibility under reservoir conditions;
Re is the Reynolds criterion for the gas flow rate, which corresponds to the rate of "wandering" of particles of the mudding deposits;
α is the degree of aeration of the foam,
moreover, the indentation is carried out with an inert gas until the pressure jump at the wellhead is fixed, and depression in the wellbore is created by reducing the pressure at the wellhead to a value determined by the formula
where P y - pressure at the wellhead when creating depression, Pa;
P PL - reservoir pressure, Pa;
ρ W - the density of the foaming liquid, kg / m 3 ;
g is the acceleration of gravity, m / s 2 ;
h W - the height of the column of foaming liquid, m;
γ is the relative specific gravity of the gas in the wellbore;
h g - the height of the gas column in the well above the level of the foaming liquid, m;
T cf - the average temperature of the gas in the wellbore, K;
Z cp is the average coefficient of gas compressibility in the wellbore,
moreover, the transportation of clogging sediments to the day surface is carried out by circulating an additional portion of the foam supplied from the wellhead through a flexible tubing, and then, with the annulus closed, the foam is pressed with inert gas into the cleaned interval of the reservoir under pressure not exceeding the pressure of the production casing , allow the flexible tubing to be admitted to the length of the cleaned interval and, with the annulus open, blow inert gas fight, and according to the set pipe tolerance length, the cyclicity of the process is determined according to
N = L / l,
where N is the number of technological cycles for the complete cleaning of the horizontal wellbore, integers;
L is the total length of the sand cork, m;
l is the length of the section of the horizontal wellbore, cleaned of sand plugs, determined by the length of the pipe tolerance, m,
and if necessary, repeat the operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU99111003/03A RU2165007C2 (en) | 1999-05-25 | 1999-05-25 | Technology to clear horizontal well from sand plug in process of overhaul |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU99111003/03A RU2165007C2 (en) | 1999-05-25 | 1999-05-25 | Technology to clear horizontal well from sand plug in process of overhaul |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| RU99111003A true RU99111003A (en) | 2001-03-10 |
| RU2165007C2 RU2165007C2 (en) | 2001-04-10 |
Family
ID=20220349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| RU99111003/03A RU2165007C2 (en) | 1999-05-25 | 1999-05-25 | Technology to clear horizontal well from sand plug in process of overhaul |
Country Status (1)
| Country | Link |
|---|---|
| RU (1) | RU2165007C2 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7631698B2 (en) | 2005-06-20 | 2009-12-15 | Schlamberger Technology Corporation | Depth control in coiled tubing operations |
| RU2455476C1 (en) * | 2010-12-20 | 2012-07-10 | Рауф Нухович Рахманов | Method of heavy oil production |
| RU2455477C1 (en) * | 2011-02-07 | 2012-07-10 | Открытое акционерное общество "Газпром" | Development method of gas well under conditions of abnormally low pressure of formation (versions) |
| RU2466272C1 (en) * | 2011-06-07 | 2012-11-10 | Открытое акционерное общество "Татнефть" имени В.Д. Шашина | Method to call inflow of formation fluid from well |
| RU2470150C1 (en) * | 2011-07-08 | 2012-12-20 | Открытое акционерное общество "Татнефть" имени В.Д. Шашина | Method of causing fluid intrusion from well |
| RU2485305C1 (en) * | 2011-12-14 | 2013-06-20 | Открытое акционерное общество "Татнефть" имени В.Д. Шашина | Stimulation method of formation fluid influx from well |
| RU2544944C2 (en) * | 2013-02-26 | 2015-03-20 | Закрытое акционерное общество "ПРОММАШСЕРВИС" | Method for removing sand-clay plug in well and its development under conditions of abnormally low formation pressures |
| RU2630938C1 (en) * | 2016-07-27 | 2017-09-14 | Публичное акционерное общество "Татнефть" имени В.Д. Шашина | Method for cleaning and treating bottomhole zone of horizontal well in bitumen deposit |
| RU2658854C1 (en) * | 2017-06-19 | 2018-06-25 | Общество С Ограниченной Ответственностью "Газпром Добыча Надым" | Well operation method |
| RU2679779C1 (en) * | 2017-10-13 | 2019-02-12 | Публичное акционерное общество "Татнефть" имени В.Д. Шашина | Method of cleaning the filtration zone of a horizontal well with abnormally low last pressure |
-
1999
- 1999-05-25 RU RU99111003/03A patent/RU2165007C2/en not_active IP Right Cessation
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