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the drainage regime of the pressure of marginal and plantar waters is manifested over time.
Each of the horizons under consideration is an independent operational object with its own design grid of wells. Therefore, the use of DC technology will significantly reduce the number of wells for drilling, and, consequently, the material and technical costs associated with drilling the field as a whole. Literature
1. Сандахчиев И.С., Атамамедов Е. Проект пробной эксплуатации Корпе-джинской группы месторождений //Отчет// 85.4315.86, ТуркменНИ- ПИнефть. - Небит-Даг, 1986 - С. 37.
2. Сандахчиев И.С. Проект пробной эксплуатации нефтяных залежей месторождения Корпедже //Отчет// 21/88, ТуркменНИПИнефть. - Небит-Даг, 1988-С. 95.
3. Прокудин А.В. Результаты внедрения оборудования ОРЭ на месторождениях ООО Лукойл - Западная Сибирь / Прокудин А.В. // Инженерная практика. - 2013. № 2. стр. 42-44.
4. Разработка и результаты испытаний оборудования для одновременно-раздельной эксплуатации скважин с установками электроцентробежных насосов/ Валеев М.Д., Газаров А.Г., Масенкин В.А. [и др.] // Нефтяное хозяйство. -2008. -№2. стр. 86-88.
© Деряев А.Р., 2022
УДК 608
Деряев Аннагулы Реджепович,
Научно-исследовательский институт природного газа ГК «Туркменгаз»,
г. Ашгабат, Туркменистан
АНАЛИЗ СУЩЕСТВУЮЩИХ СХЕМ УСТАНОВОК ДЛЯ ОДНОВРЕМЕННО-РАЗДЕЛЬНОЙ ЭКСПЛУАТАЦИИ ПЛАСТОВ
Аннотация
Обязательные требования ко всем схемам одновременно-раздельной эксплуатации -возможность раздельного освоения и пуска в эксплуатацию каждого пласта, замера дебитов нефти каждого пласта в отдельности, а также раздельного замера каждого пласта на обводненность, газосодержание и исследование каждого пласта на приток нефти и газа.
Ключевые слова
Расширенный ствол, пакер, мандрель, подъемный агрегат, извлекаемый забойный отсекатель,
центрабежный насос, двухлифтовая установка.
Deryaev Annaguly Rejepovich
Scientific Research Institute of Natural Gas of the State Concern "Turkmengas",
Ashgabat, Turkmenistan
ANALYSIS OF EXISTING INSTALLATION SCHEMES FOR DUAL COMPLETION OF LAYERS
Abstract
Mandatory requirements for all schemes of dual completion (DC) are the possibility of separate
development and commissioning of each reservoir, measurement of oil flow rates of each reservoir separately, as well as separate measurement of each reservoir for water content, gas content and examination of each reservoir for oil and gas inflow.
Keywords
Expanded barrel, packer, mandrel, lifting unit, extractable bottom-hole cut-off, centrifugal pump, two-lift installation.
DC is carried out by equipping wells of conventional design with equipment that separates productive formations, or by using wells of special design. In Russia, the method of of dual completion is used by different oil companies mainly in Tatarstan by OAO «Tatneft». Since the oil fields of Tatarstan are at a late stage of development, only those technological schemes that can be used for mechanized production of well products were considered. In wells of a special design, production columns are lowered into the unsettled trunk in parallel rows, then they are cemented. The opening of oil reservoirs is carried out with directional perforators so as not to damage adjacent columns. As a result, a multi-stem (multi-row) well or several independent wells of small diameter united by a common trunk are obtained. Each of these wells operates only one of the layers with conventional equipment (Fig. 2.).
Fig. 1 - Multi-barrel borehole
In wells of conventional construction, layers separated by packers are connected to the mouth by several lift (parallel or concentric) columns (Fig. 2). At the same time, each layer is operated separately. The scheme allows simultaneous extraction (or injection) from both layers, as well as pumping water into one of them, and extracting oil from the other. According to this scheme, the production of layers is extracted separately, which facilitates its accounting [1].
There is a scheme when two layers separated by a packer are alternately operated by one pump. In this case, the pump can be of any type - rod, hydrodynamic, electric submersible. Switching it from one layer to another is carried out by raising, lowering or rotating a column of elevator pipes. To do this, the wellhead is equipped in such a way that the movement or rotation of the pipe column can be carried out manually or automatically according to a given program without installing a lifting unit.
Fig. 2 - Two-lift installation
Each reservoir can be operated by its own pump. An example is a scheme in which two rod pumps are driven by one column of rods and operate each layer separately (Fig.3). There are schemes with two screw or electric centrifugal pumps [1].
The DC scheme of two layers in a well using a differential pumping unit consists of two rod pumps and two packers. At the same time, extraction from the upper layer is carried out due to the difference in the cross-sectional areas of their plungers, and the liquid is lifted through the inter-tube space [2].
The advantages of a single-lift DCI scheme in comparison with a two-lift one are the use of only one tubing column (lower cost), the possibility of separate injection of water into two layers or more.
Baker Huges has developed a two-lift pumping unit for one lifting operation. Hydraulic packers can be installed after completion of work in the well, eliminating the need to use rope equipment. The tubing string nipples located below each packer provide the temporary clogging required to install the packer, or as needed throughout the life of the well. A sliding sleeve mounted on a long column above the lower packer provides circulation or injection of liquids for processing the upper interval or the possibility of operating the upper interval through a long column. Borehole safety valves installed on both columns above the double packer ensure automatic shutdown of the well in case of damage to the wellhead equipment or the tubing column above the packer, as required when completing wells at sea. This system provides the ability to extract the entire pumping system in one lifting operation.
.Mandrel with side pocket :i a well-knitted fluid regulator
With double tension packer
Mandrel with side pocket l a well-knitted fluid regulator
Removes packer LOK-SETA-3
Downhole fluid ^flow regulator
Rope end guide device
Figure 3 - Installation for DC with mandrels by Baker Huges
Figure 3 shows the pumping scheme for flooding several intervals. Pumping for flooding, requiring the injection of liquid in several intervals, can be economically implemented using single-column packers. Borehole flow regulators installed in mandrels with side pockets provide regulation of fluid volumes directed to the upper intervals. The profile of the lower profiled nipple, located under the lower packer, allows you to install a flow-through regulator to control the injection of liquid into the lower interval.
The DeepSet Splitter (DSS) system (Fig. 4) is based on a conventional separation design with an expanded Y-block. This system has standard sizes 13-3/8", 7-5/8", 7-5/8" it descends on a casing pipe with a diameter of 13-3/8" into a drilled and expanded trunk with a diameter of 17-1/2". After that, a riser is installed inside the DSS to provide a separate channel for cementing and cleaning the trunk during drilling at a sufficient speed.
The advantages of the DSS level system compared to other systems with multiple side barrels are as follows:
- elimination of the need to exit the casing and the associated formation of sludge;
- ensuring high tightness at the junction due to the use of a casing string;
- easy installation procedures and low risk;
- an additional riser system isolates the junction from the impact of drilling and cementing operations.
The layout shown in Fig. 4 represents one of the possible variants of the DSS with a funnel-shaped
discharge device. This module allows for separate extraction from each reservoir and lifting of products to the surface. The DSS with a funnel-shaped discharge device is self-oriented on a key that directs one tubing column to dock in a 7-5/8" packer with a sealed through passage. The second tubing string telescopically passes through the DSS with a funnel-shaped discharge device and enters the second 7-5/8" packer with a sealed through passage. Such a well allows production and allows re-entry as if the side shafts were two independent wells.
Turkmenistan has developed various devices and methods for dual completion of several layers.
For example, consider one of the simple methods developed for the DC of two productive horizons. Perforation of two productive intervals is carried out from the bottom up, first the lower layer is perforated with a polymer-lime liquid unfiltered into the formation for silencing wells (without clay particles) [3], with the following component ratio, wt.%: lime - 25-40; soda ash (Na2OCOs) - 2 - 2.1; polyacrylamide (PAA) - 0.3 -0.4; carboxymethylcellulose (CMC) - 0.9 - 1; starch - 1 - 1.1; soapstock - 2.0 - 2.1; water - the rest.
Fig. 4. - Baker Huges DSS system - installation for DC in a well with two horizontal shafts
Next, the well is put into temporary operation to study the parameters of the formation, and the perforated lower interval is covered with a clay-sand plug, the upper layer is perforated. Underground equipment consisting of two parallel rows of tubing is lowered into the well: one long row with layouts consisting (from bottom to top) of a working shank (with a socket coupling, a landing device, a landing nipple) and a non-working shank (with a landing nipple closed with a plug), a two-row packer located below the upper productive interval, columns of a long row of elevator pipes with a circulation valve, a heat stabilizer, (if necessary, and a gas lift valve or other equipment), a short row of tubing with layouts, consisting from the bottom up of a socket coupling, a landing device, a landing nipple (if necessary, and a gas lift valve or other equipment), while a short row of tubing is installed in a suspended version without a rigid connection with the packer. After washing the clay-sand plug, calling the inflow from the layers, developing the well using traditional technology, oil is extracted from the lower layer by a long row of tubing, and from the upper one by a short row of tubing.
This two-lift design, a method of dual completion of two horizons with one well, was used in the refined development project of the field "10 years of Independence", for drilling 4 gas wells with dual completion (III packs) of the first horizon and (III-IV packs) of the second horizon. (Well design is a method dual completion of two horizons with one well at the "10 years of Independence" field. Literature:
1. Оборудование для раздельной эксплуатации многопластовых нефтяных и газовых скважин: каталог/под ред. О.И. Эфендиева. - Баку: ЦИНТИХИМНЕФТЕМАШ, 1988. - 52 с.
2. Максутов Р.А. Доброскок Б.Е., Зайцев Ю.В. Одновременная раздельная эксплуатация многопластовых нефтяных месторождений. - М.: Недра, 1974. - 231 с.
3. Разработка и результаты испытаний оборудования для одновременно-раздельной эксплуатации скважин с установками электроцентробежных насосов/М.Д. Валеев, А.Г. Газаров, В.А. Масенкин [и др]//Нефтяное хозяйство. -2008. - № 2. 86-88 с.
© Деряев А.Р., 2022
Стукалин Андрей Александрович Полушкина Ирина Андреевна Стукалов Никита Евгеньевич Какунина Алина Сергеевна
ФГБОУ ВО «ВОРОНЕЖСКИЙ ГОСУДАРСТВЕННЫЙ ТЕХНИЧЕСКИЙ УНИВЕРСИТЕТ»,
г. Воронеж, РФ
ВЛИЯНИЕ СОУЮ-19 НА РАСПРОСТРАНЕНИЕ КОМПЬЮТЕРНЫХ ВИРУСОВ
Аннотация
В статье рассмотрены причины распространения компьютерных вирусов, а также статистика увеличения тенденции в период пандемии.
Ключевые слова Компьютерные вирусы, антивирусы.
