RU102676U1 - DEVICE FOR INTEGRATED PROCESSING OF PRODUCTIVE LAYERS (OPTIONS) - Google Patents

Abstract

 1. A device for the integrated treatment of reservoirs, including a jet pump and a packer installed on a tubing string, characterized in that it further comprises a drill punch installed in the bottom of the tubing string. ! 2. A device for the integrated treatment of productive formations, including a jet pump and a packer installed on a tubing string, characterized in that it further comprises a hydraulic probe punch installed in the lower part of the tubing string. ! 3. A device for complex treatment of productive formations, including a jet pump and a packer mounted on a connecting pipe (s), characterized in that it further comprises a drill punch installed below the jet pump and a packer, and the connecting pipe (pipes) is made (made) in flexible tubing coiled tubing. ! 4. A device for complex treatment of productive formations, including a jet pump and a packer installed on a connecting pipe (s), characterized in that it further comprises a hydraulic probe punch installed below the jet pump and a packer, and a connecting pipe (pipes) is made (made) in the form of flexible tubing coiled tubing.

Description

The utility model relates to the oil and gas industry, to the field of drilling and well operation, and in particular to devices for the secondary opening and acid treatment of productive formations in order to intensify oil and gas production.

Known are the technologies for treating productive formations in order to stimulate the inflow, including the secondary opening of the production string by a cumulative perforator, possible subsequent acid treatment of the bottom-hole formation zone (PZP), and cleaning the well of reaction products by creating a depression using an inkjet unit including a jet pump and a packer (SU 1570384 A1, MPK-6 Е21В 43/11, 05/10/1996; SU 1572084 A1, MPK-6 Е21В 43/11, 11/20/1996; RU 2015317 C1, MPK-5 Е21В 49/00, 06/30/1994 g .; RU 2170857 C1, MPK-7 F04F 5/54, 07/20/2001; RU 2188342 C1, MPK-7 F04F 5/54, 08/27/2002) atkom these technologies is the use of unsafe cumulative, explosive perforation. Cumulative perforation creates an impact on the casing and can cause negative consequences associated with this - a violation of the integrity of the cement ring below and above the perforation interval, which can lead to annular flows. When cumulative perforation is used, especially in terrigenous sandstones, glass forms in the near-stem part of the formation and compaction of the adjacent rock occurs, which severely clogs the PPP. In some cases of explosive perforation, in the absence of a centering system, axial displacement of the cumulative charge arrangement lowered into the well can occur, which, when the perforator is triggered, causes the formation of local swelling of the column and a number of poor-quality holes and channels.

The safer and more effective drilling perforation technologies are known from the prior art: RU 2109129 C1, IPC Е21В 43/11, 04/20/1998; SU 1776771 A1, IPC Е21В 43/11, 11/23/1992; RU 19086 U1, IPC Е21В 43/11, 08/10/2001; RU 2190089 C1, IPC Е21В 43/112, 09/27/2002; RU 2236564 C1, IPC Е21В 43/112, 09/20/2004; RU 2286442 C1, IPC Е21В 43/11, 10.27.2006; RU 2278961 C2 IPC Е21В 43/11, 06/27/2006; RU 67173 U1, IPC Е21В 43/11, 10/10/2007; hydraulic probe perforation: SU 883350 A1, IPC ЕВВ 43/114, 11/23/1981; SU 916744, IPC Е21В 43/114, 03/30/1982; RU 2137915 C1, IPC Е21В 43/114, 09/20/1999.

Drilling and probe perforators allow the formation of perforation channels of long length in the production casing - up to 3 meters.

However, the well-known technologies for the use of drilling and hydraulic probe drills require, as a rule, sequential descent of devices for each stage of work to stimulate the inflow, each technological operation in the well (perforation, acid treatment, cleaning of the well) involves operations to raise and lower the corresponding devices (rotary hammer, jet installation).

The objective of the proposed utility model is to create an integrated device that allows, firstly, to carry out all the work on processing and development of the well in one round trip and, secondly, to increase the efficiency and safety of operations involving the processing of productive formations.

The safe and effective technology for complex processing of productive formations using a device according to utility model RU 92466 U1, IPC ЕВВ 43/25, 03/20/2010 is known from the prior art. This device is the closest to the proposed utility model and is taken as a prototype.

The prototype is a device for complex treatment of productive formations, including a jet pump and a packer installed on the tubing string, additionally containing a slotted punch or hydromechanical piercing punch installed in the lower part of the tubing string. The slotted perforator can be equipped with hydromonitor nozzles installed with the possibility of directional supply through them through the tubing of opening fluid for the formation of caverns in productive formations, as well as fluids for acid treatment (chemicals). The piercing punch can be made with a hydrochannel (s) in a punch (s), through which directional injection of opening fluid through the tubing can take place to form caverns in productive formations, as well as fluid for acid treatment (chemicals).

The device according to the prototype allows for one descent to carry out safe opening of the production string using a slotted or piercing puncher, to carry out the washing of caverns in the PZP in the presence of hydromonitor nozzles or hydraulic channels of the punches, and then immediately carry out the acid treatment of the PZP followed by pumping of the reaction products using a jet pump and well development. When using the device, the time between the opening of the column and the acid treatment of the bottomhole formation zone is minimized, the time of exposure of the working fluid (opening liquid) to the formation is reduced, which reduces the seizure of the bottomhole section and increases the efficiency of acidization due to faster and deeper penetration of chemicals into the reservoir.

The disadvantage of the prototype device is the relatively shallow depth of the perforation holes formed during perforation. Slot and piercing perforators, which are part of the prototype device, are not able to create long perforation channels.

The proposed utility model eliminates this drawback by replacing the slotted or hydromechanical piercing punch in its design with a drilling punch or hydraulic probe punch and thus improving the well-known multifunctional installation, which allows to achieve the following technical result: the possibility of complex processing of the well in one round trip with formation long perforation channels while maintaining work safety and saving time The amount of time spent on processing and developing the well, and thereby increasing the efficiency of processing productive formations.

According to a utility model, a device for complex treatment of reservoirs, including a jet pump and a packer installed on a tubing string, further comprises a perforating drill installed in the bottom of the tubing string.

An embodiment of the utility model is also proposed, according to which a device for complex processing of productive formations, including a jet pump and a packer installed on the tubing string, further comprises a hydraulic probe punch installed in the lower part of the tubing string.

Utility model variants are proposed that are mounted not on a tubing string, but on flexible tubing coiled tubing. In this embodiment, a device for complex treatment of productive formations, including a jet pump and a packer mounted on a connecting pipe (s), further comprises a drill punch or hydraulic probe punch installed below the jet pump and a packer, and the connecting pipe (pipes) is made (made) in flexible tubing coiled tubing.

The drilling punch or hydraulic probe punch included in the device allows the column to be opened to form extended perforation channels, thereby increasing the efficiency of the device.

Immediately after perforation without additional trips, it is possible to conduct acid treatment of the PPP. In the process of acid treatment, chemicals are injected

a) directly through the tubing in a known manner, previously stopping the circulation of fluid in the perforator by knocking down the check valve (s) of the perforator or by other means, or

b) through the tubing through the probe and nozzle of the hydraulic probe punch, or

c) sequentially or simultaneously by both of the above methods.

The supply of chemicals through the probe and the nozzle of the hydraulic probe punch allows, in addition to the chemical, also directed mechanical action on the bottomhole formation zone, which actively destroys the mud and increases the permeability of the formations.

The use of a packer allows the injection of chemicals into the bottomhole formation zone, including through a hydraulic probe punch, at a pressure higher than the pressure of the production casing without impacting the casing, which reduces the injection time and, in some cases, facilitates deeper penetration of chemicals into the reservoir. In addition, using a packer, it is possible to carry out a cyclic hydrodynamic effect on the formation, including at elevated pressure, in order to intensify the flow and increase the injectivity of the formation.

The use of flexible tubing (coiled tubing) as a connecting element of the device allows you to get an additional technical result - reducing the time spent on hoisting operations.

The inventive device in one of the possible types of its execution is shown in the drawing.

The device contains sequentially installed on the tubing string 1 from top to bottom, a crimping unit 2, a plug-in jet pump 3, a packer 4 and a drilling perforator 6 installed in the lower part of the tubing 1. The perforator is made with a check valve 7.

The device operates as follows.

The device is lowered into the well on the tubing string 1 until the perforator 6 reaches the specified perforation interval, the column is opened by forming extended perforation channels, the well is washed, the tubing 1 is crimped, the packer 4 is unpacked, formation presence or injectivity is determined by known methods. If necessary, carry out a series of works on the hydrodynamic effects on the reservoir to increase injectivity. Then, chemicals are pumped through the tubing 1 in a known manner, previously stopping the circulation of fluid in the perforator 6, for example, by knocking down the check valve 7 of the perforator 6. After that, the necessary technological exposure is carried out, at the end of the reaction time the reaction products are removed from the well by creating a depression on the formation by a jet pump 3, and produce well development.

If the device has, as an option, a hydraulic probe punch, the device works in the same way: the device is lowered into the well on the tubing string until the punch reaches the specified perforation interval, the column is opened by forming extended perforation channels, the well is washed, the tubing is crimped, the packer is unpacked, determined the presence of inflow or injectivity of the reservoir by known methods. If necessary, carry out a series of works on the hydrodynamic effects on the reservoir to increase injectivity. Then, chemicals are pumped through the tubing through the probe and nozzle of the hydraulic probe punch, either directly through the tubing in a known manner, previously stopping the circulation of fluid in the punch, for example by knocking down the punch check valve, or sequentially or simultaneously by both methods through the probe and nozzle of the hydraulic probe punch and directly by tubing. After that, the necessary technological exposure is carried out, at the end of the reaction time, the reaction products are removed from the well by creating a depression on the formation with a jet pump, and the well is developed.

When mounting the device on flexible tubing (coiled tubing), the device is lowered into the well on flexible tubing until the perforator reaches the specified perforation interval, the column is opened by forming extended perforation channels, the well is washed, the packer is unpacked, formation presence or injection rate is determined by known methods. If necessary, carry out a series of works on the hydrodynamic effects on the reservoir to increase injectivity. Then, chemicals are pumped through the tubing using the methods described above, after which the necessary technological exposure is carried out. At the end of the reaction time, the reaction products are removed from the well by creating a depression on the formation with a jet pump, and the well is developed.

Claims (4)

1. A device for the integrated treatment of reservoirs, including a jet pump and a packer installed on a tubing string, characterized in that it further comprises a drill punch installed in the bottom of the tubing string. 2. A device for the integrated treatment of productive formations, including a jet pump and a packer installed on a tubing string, characterized in that it further comprises a hydraulic probe punch installed in the lower part of the tubing string. 3. A device for complex treatment of productive formations, including a jet pump and a packer mounted on a connecting pipe (s), characterized in that it further comprises a drill punch installed below the jet pump and a packer, and the connecting pipe (pipes) is made (made) in flexible tubing coiled tubing. 4. A device for complex treatment of productive formations, including a jet pump and a packer installed on a connecting pipe (s), characterized in that it further comprises a hydraulic probe punch installed below the jet pump and a packer, and a connecting pipe (pipes) is made (made) in the form of flexible tubing coiled tubing.