阅读说明：本技术 一种同层啮合射孔方法及装置 (Same-layer meshing perforation method and device ) 是由 张维山 王朝晖 胡津辉 王宪超 吕巍 隋朝明 张唯一 张凯 景阳 马庆国 韩向男 于 2019-09-26 设计创作，主要内容包括：本发明提供了一种同层啮合射孔方法及装置,涉及石油勘探的技术领域,所述装置包括：封隔器、环空加压装置,压力传递装置、纵向啮合展开装置、相位啮合射孔器；从井口到目的层依次安装环空加压装置、压力传递装置,封隔器、纵向啮合展开装置、相位啮合射孔器；相位啮合射孔器包括相连的第一射孔枪以及第二射孔枪。通过本发明提供的方法提供的方法和装置可以降低现有技术中由于射孔方式而造成的施工风险,同时提高原油产能。(The invention provides a same-layer meshing perforation method and a device, which relate to the technical field of oil exploration, and the device comprises: the device comprises a packer, an annular pressurizing device, a pressure transmission device, a longitudinal meshing deployment device and a phase meshing perforator; sequentially installing an annular pressurizing device, a pressure transmission device, a packer, a longitudinal meshing and expanding device and a phase meshing perforator from a wellhead to a target layer; the phase engagement perforator includes a first perforating gun and a second perforating gun connected. The method and the device provided by the invention can reduce the construction risk caused by a perforation mode in the prior art and simultaneously improve the crude oil productivity.)

1. A same-layer engagement perforating device, comprising: the device comprises a packer, an annular pressurizing device, a pressure transmission device, a longitudinal meshing deployment device and a phase meshing perforator;

sequentially installing the annular pressurizing device, the pressure transmission device, the packer, the longitudinal meshing deployment device and the phase meshing perforator from a wellhead to a target layer;

the phase engagement perforator includes a first perforating gun and a second perforating gun connected.

2. The device of claim 1, wherein the longitudinally-engaging deployment device comprises an outer barrel, a stop step, a central tube, and a pin;

in an initial state, the central tube is inserted into the outer barrel, the longitudinal meshing unfolding device is pressurized to enable the central tube to cut off the pin, and the central tube moves to the limiting step to achieve stretching and retracting of the longitudinal meshing unfolding device.

3. A method of using the apparatus of claim 1, in particular according to the following steps:

s1: connecting the whole tool to a target layer, and performing depth correction work to seal the packer on the well wall for sealing;

s2: pressurizing the annulus so that the pressure is transmitted into the annulus below the packer through the annulus pressurizing device and the pressure transmission device, and detonating the bottom perforating gun of the first-phase engagement perforator to complete perforation;

s3: pressurizing the longitudinally-engaged deployment device to cause the central tube to cut off the pin, the central tube moving to the limit step to achieve the expansion and contraction of the longitudinally-engaged deployment device;

s4: wellhead pressure is transmitted into the interior of the central tube to cause the pressure initiation device to detonate the second phase engagement perforator.

Technical Field

The invention relates to the technical field of oil exploration, in particular to a same-layer meshing perforation method and device.

Background

In oil exploration and development, perforation is a key link in the well completion process. At present, the most widely applied method is to adopt a shaped perforator, perforate a casing and a well cementation cement sheath to communicate a shaft and an original stratum for subsequent production.

The perforator consists of perforating bullet, perforating gun and other firer fittings, and its main indexes include penetration depth, aperture, hole density and phase position, the penetration depth and aperture are determined by the performance of the perforating bullet itself, and the hole density and phase position are determined by the arrangement density and arrangement mode of the perforating bullet in the perforating gun. The penetration depth is the premise of whether the shaft and the stratum can effectively reach communication or not, and the size of the seepage area determined by the aperture is not considered due to the fact that the penetration depth and the aperture are in an inverse proportion relation under the limitation of a perforating bullet structure. Therefore, in order to improve the perforation effect, the loading density is reasonably increased, the arrangement mode of loading is improved, the seepage area in a unit shaft is increased, and the productivity of an oil well can be effectively improved under the condition of ensuring the penetration depth. Due to the limitation of the geometrical sizes of the perforating gun and the perforating bullet, the loading density of a single perforator cannot be improved to a certain degree, and therefore repeated perforation in the same layer is an effective means for increasing the hole density.

Disclosure of Invention

In view of the above, the present invention provides a method and an apparatus for performing perforation in a same layer engagement, so as to reduce the risk of construction caused by the perforation method in the prior art and improve the crude oil productivity.

4. In a first aspect, embodiments of the present invention provide a same-layer meshing perforation device, including: the device comprises a packer, an annular pressurizing device, a pressure transmission device, a longitudinal meshing deployment device and a phase meshing perforator;

sequentially installing the annular pressurizing device, the pressure transmission device, the packer, the longitudinal meshing deployment device and the phase meshing perforator from a wellhead to a target layer;

the phase engagement perforator includes a first perforating gun and a second perforating gun connected.

And sequentially installing the annular pressurizing device, the pressure transmission device, the packer, the longitudinal meshing deployment device, the phase meshing perforator and the second phase meshing perforator from a wellhead to a target layer.

Specifically, the longitudinal meshing unfolding device comprises an outer barrel, a limiting step, a central pipe and a pin;

in an initial state, the central tube is inserted into the outer barrel, the longitudinal meshing unfolding device is pressurized to enable the central tube to cut off the pin, and the central tube moves to the limiting step to achieve stretching and retracting of the longitudinal meshing unfolding device.

On the other hand, the invention provides a same-layer meshing perforation method which specifically comprises the following steps:

s1: connecting the whole tool to a target layer, and performing depth correction work to seal the packer on the well wall for sealing;

s2: pressurizing the annulus so that the pressure is transmitted into the annulus below the packer through the annulus pressurizing device and the pressure transmission device, and detonating the bottom perforating gun of the first-phase engagement perforator to complete perforation;

s3: pressurizing the longitudinally-engaged deployment device to cause the central tube to cut off the pin, the central tube moving to the limit step to achieve the expansion and contraction of the longitudinally-engaged deployment device;

s4: wellhead pressure is transmitted into the interior of the central tube to cause the pressure initiation device to detonate the second phase engagement perforator.

The embodiment of the invention has the following beneficial effects: the invention provides a same-layer meshing perforation method and a device, wherein the device comprises: the device comprises a packer, an annular pressurizing device, a pressure transmission device, a longitudinal meshing deployment device and a phase meshing perforator; sequentially installing an annular pressurizing device, a pressure transmission device, a packer, a longitudinal meshing and expanding device and a phase meshing perforator from a wellhead to a target layer; the phase engagement perforator includes a first perforating gun and a second perforating gun connected. The method and the device provided by the invention can reduce the construction risk caused by a perforation mode in the prior art and simultaneously improve the crude oil productivity.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a diagram of a pre-longitudinal deployment phase engagement perforator bottom perforating gun alignment level perforation state provided by an embodiment of the present invention;

FIG. 2 is a diagram of a longitudinally-deployed post-phase-engagement perforator upper-end gun alignment-horizon perforation state provided in accordance with an embodiment of the present invention;

FIG. 3 is a comparative illustration of the deployment of single perforation and conventional repeat perforation perforations in casing provided by an embodiment of the present invention;

FIG. 4 is a schematic diagram of a longitudinally engaged stent according to an embodiment of the present invention;

fig. 5 is an assembly block diagram of a phase-engagement perforating gun according to an embodiment of the present invention.

Icon: 101-annulus pressurization means; 102-a packer; 103-longitudinally engaging the deployment device; 104-a second perforating gun; 105-a destination layer; 106-a first perforating gun; 401-limit step; 402-shear pins; 403-central tube.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Based on the fact that the construction risk is easily caused by the existing perforation mode and the crude oil productivity is reduced, the same-layer meshing perforation method and the same-layer meshing perforation device can slowly reduce the construction risk caused by the perforation mode in the prior art and improve the crude oil productivity.