CC BY
8
UDK 608
Deryaev A.R.
Candidate of Technical Sciences, Senior Researcher, Scientific Research Institute of Natural Gas of the State Concern Turkmengas",
Ashgabat, Turkmenistan
METHOD OF DUAL COMPLETION OF TWO PRODUCTIVE HORIZONS USING A SINGLE WELL
Abstract
The method of dual completion from several productive horizons allows to reduce the cost of hydrocarbon production by reducing the costs of operation and maintenance of production wells, reducing capital investments in the construction of reservoirs, oil collections and reducing costs during their operation and repair, as well as reducing capital investments for drilling production wells.
Keywords
expanding packer, slit filter, clay-sand plug, double-row packer, liner, filtration, coiled tubing, gas lift valve.
There is a known method of dual completion (DC) of two layers by one well [1]. The method has a number of disadvantages, namely the complexity of the selection, installation and dismantling of equipment. The use of an analog requires the arrangement of couplings of long and short rows of tubing in different places. It is difficult to combine them inside the operational column with diameters of 168-178 mm, so they have to be lowered simultaneously in parallel rows. And this requires an additional special device for lowering the tubing, which complicates the manufacturability of the method. In addition, it is impossible to reach the upper horizon filter interval due to the concentric arrangement of the long row and the reduction in the size of the annular space.
A method of sequential development of a multi-object well is known [2], including perforation of two productive intervals, descent into the well of an arrangement consisting of a landing device from bottom to top, a shank, a packer located below the upper productive interval, a column of pipes with a knock-down valve at the level of the upper productive interval and at the mouth of a tee with an overlapping outlet and an overlapping branch pipe above the tee, packer planting, swabbing along the pipe column of the lower productive layer, building a level recovery curve for the lower productive layer, assessment of the productivity of the lower productive layer, after swabbing the lower layer and restoring the liquid level in the well, discharge into the pipe column and placement of a shut-off device in the landing device, creating pressure in the pipe column and opening the knock-down valve, swabbing along the pipe column of the upper productive layer, constructing a level recovery curve for the upper productive layer, assessing the productivity of the upper productive layer, lifting the layout from the well, lowering the deep-pumping equipment and operating the well.
The disadvantages of this method include: the need to use adjustable valves in most cases, the difficulty in processing the bottom-hole zone of the well and determining the flow rate (pick-up rate) of each operated object.
Another significant disadvantage of this method is that when installing multi-packer installations, there is no possibility of crimping the tightness of the packers and the difficulty in extracting them due to equipment grabs at the bottom. The reason for the tacks is the tight connection between several packers, the inability to balance the annular and in-tube pressure before their failure, sprinkling of packers with mechanical impurities and corrosion products.
The technical objective of the invention is to increase the manufacturability of using the method during
completion, operation and repair of oil and gas wells.
The technical result of solving the technical problem is achieved by perforating two productive intervals from the bottom up, first perforating the lower layer with an unfiltered polymer-lime liquid for silencing wells (without clay particles) [3], with the following component ratio, mass%: lime - 25-40; soda ash (Na2OCO3) - 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. 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.
The method is carried out as follows.
Two productive intervals are punched sequentially (from bottom to top): first, the lower horizon is filled with a special liquid without clay particles, the well is mastered, the parameters of the formation and the operation of the well are determined, after which the perforated interval of the lower horizon is covered with a clay-sand mixture. Then the upper horizon is perforated. A long row with layouts is lowered into the well, 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-plug), a two-row packer located below the upper productive interval, a column of elevator pipes (with a circulation valve, with a heat stabilizer, if necessary, and a gas lift valve or other equipment). After that, the packer is packed, by creating the required pressure inside the tubing, within 8,0 MPa - 12,0 MPa and further increasing the pressure to 18,0 MPa - 35,0 MPa, the packed packer is pressed for tightness. Then another short row of tubing with layouts is lowered, consisting from bottom to top 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 with the help of coiled tubing, 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.
The novelty of the method is that:
- standard 73 mm non-coupling tubing pipes are used as long and short tubing rows, if necessary in an anticorrosive design. They are designed for separate oil extraction from each reservoir separately and the implementation of independent technological processes separately without stopping production, while a long row of tubing is installed eccentrically, and a short row of tubing in a suspended version;
- as a disconnector of the lower layer, an operational packer with two eccentrically arranged trunks is used, one trunk of which is closed with a plug plug in a non-working shank, and the second is used for a long row of tubing. At the same time, the displacement of the tubing is excluded and free access (passage) to the subpacking zone of the well is provided by cable equipment or coiled tubing, which is an important factor that increases the manufacturability of the method. According to the prototype, an operational packer is used as a disconnector of the lower layer, with one concentrically arranged trunk, in which there is a displacement of the tubing of a long row;
- an unfiltered polymer-lime solution (without clay particles) is used as a well jamming fluid according to
T.P. Turkmenistan №. 380 [3], and according to the prototype, a special expensive liquid based on calcium bromide is used as a jamming fluid;
- as a cut-off valve, a landing unit of a well repair device is used [4], which provides the possibility of crimping tubing on cable equipment.
A comparative analysis of the technical solution with the prototype shows that the essential differences of the invention are: the use of a two-row operational packer with eccentrically arranged trunks, one trunk of which is closed with a plug in a non-working shank, and the second is used for a long row of tubing; the use of a device for repairing wells according to [4]; ensuring the possibility of checking each row of tubing for tightness separately; the use of a polymer-lime solution unfiltered into the formation (without clay particles) according to [3]; and the use of a special method of disrupting and extracting the packer. Therefore, the claimed technical solution meets the criterion of the invention "inventive level".
Literature
1. Задора Г.И. Оператор по добыче природного газа. - М., «Недра», 1980, с 261 (стр. 55).
2. Патент РФ 2483208, Способ последовательного освоение многообъектной скважины.
3. ВП Туркменистана №380, 19.10.2004 С09К 7/02, Жидкость для глушения скважин.
4. А.С. СССР №1406337, Е21В 43/13, Устройство для ремонта скважин.
© Deryaev A. R., 2022
УДК 69
Ильин Е.А.,
магистрант 2-ого курса
Санкт-Петербургского государственного архитектурно-строительного университета,
г. Санкт-Петербург, РФ
ОСОБЕННОСТИ ВНЕДРЕНИЯ В1М-МОДЕЛИРОВАНИЯ В СУБПОДРЯДНЫЕ ОРГАНИЗАЦИИ НА ПРИМЕРЕ ВНУТРЕННИХ ИНЖЕНЕРНЫХ СИСТЕМ НА ЭТАПЕ ПРОЕКТИРОВАНИЯ И МОНТАЖА
В РОССИЙСКОЙ ФЕДЕРАЦИИ
Аннотация
Нехватка компетентных кадров, зависимость от генподрядчика, высокая налоговая ставка, многоэтапная процедура документооборота, рост инфляции, вот с чем сталкиваются субподрядчики в нынешнее время на строительном рынке России. Некоторые из представленных проблем можно решить следующим образом: внедрение Ыт-моделирования в учебные программы высших и средних учебных заведениях; осуществление практики для молодых специалистов без опыта в кампании со специалистами, имеющие огромный стаж работы; централизованное внедрение программного софта государством; цифровизация процесса ведение документаоборота.
Ключевые слова
Bim-моделирование, инженерные сети, субподрядные организации, строительство,
внедрение, строительный рынок.
