Well completion method
A technology for oil wells and reservoirs, applied in the development and completion of oil-producing layers, can solve the problems of reducing permeability, reducing oil well productivity, increasing construction value and time, etc.
Inactive Publication Date: 2012-05-23
帕维尔·德米特里耶维奇·亚历山德罗夫
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Problems solved by technology
In addition, the flushing fluid flowing into the oil-producing layer can significantly reduce the effective permeability and reduce the productivity of the oil well, resulting in a decrease in oil production, which is equivalent to increasing the value and time of construction
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Embodiment Construction
[0058] The oil well 1 provided with the wellhead 2 is equipped with additional equipment, so as to implement the initial development project of the oil production layer 5 . Oil well 1 li is filled with flushing liquid 4 earlier.
[0059] Wellhead 2 is installed with universal and ram type ( figure 1 ) of the blowout preventer (3) to prevent various reservoir fluids from spraying out, and the manifold is installed with a throttle valve ( figure 1 ) in order to be able to adjust the flow intensity of the flushing fluid flowing from the oil well 1 during the excavation operation of the oil well 1 .
[0060] The wellhead 2 is additionally equipped with an anti-rotation device ( image 3 ), so that it can be used to seal the downhole equipment (drill string) 10 and the wall near the wellhead 2 in the oil well 1 during the excavation operation of the oil well 1 .
[0061] The downhole equipment (drill string) 10 is provided with check valves (not shown). The check valve is insta...
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The method pertains to the oil and gas industry and can be used in the development of producing formations. A producing string (6) together with a sealing device (7) are lowered into a well (1) and the well (1) is divided into an upper cavity (8) and a lower cavity (9) with the aid of said sealing device (7) to establish a hydraulic connection between the well opening and the upper cavity and between the lower cavity and the producing formation, respectively. The installation of equipment (10) and a check valve is carried out stepwise. A washer fluid (4) is replaced by a washer fluid (15). The equipment (10) is passed through the sealing device (7) and the hydraulic connection between the well opening, the lower cavity and the producing formation is re-established along the annular channel. The well (1) is deepened using the equipment (10) until an inflow of formation fluids occurs, the differential pressure in the hydraulic system ''well opening - producing formation'' being adjusted using the check valve and a blowout preventer (3). The equipment (10) is withdrawn from the lower cavity (9) upon completion of deepening, the device (7) is closed during separation of the cavity (9) from the cavity (8) and cutting-off the hydraulic connection between the producing formation and the upper cavity. The technical solution increases the efficiency and quality of technical operations and prevents the undesired inflow of formation fluids.
Description
technical field [0001] The invention is related to the oil and gas industry, that is to say, related to the drilling and operation of oil and gas wells, and can be used for the development and completion of oil producing layers. Background technique [0002] RU No. 2283418C2, E21B21 / 00 patent dated September 10, 2006 discloses a method for the initial development of pay zones during the process of drilling oil and gas, which involves the use of different drilling fluid components to create optimal conditions for initial development. [0003] This method refers to the selection of various additives to be added to the drilling fluid depending on the construction stage in the development of the oil-producing layer. [0004] On October 27, 1999, RU No. 2140521C1, E21B33 / 13 patent disclosed another well completion method, which included the initial development of the oil production layer, the fixing of the oil production pipe, and the secondary development of the oil production l...
Claims
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IPC IPC(8): E21B43/00E21B7/00
CPCE21B43/12E21B7/00E21B33/10E21B33/126
Inventor 狄米崔·伊万诺维奇·亚历山德罗夫
Owner 帕维尔·德米特里耶维奇·亚历山德罗夫