CN114607349A - Oil and gas well testing equipment and oil and gas well testing method - Google Patents

Abstract

The embodiments of the present application disclose an oil and gas well testing equipment and an oil and gas well testing method, which belong to the technical field of oil and gas exploitation. The method includes: determining the size of the rupture disc circulation valve, the pressure transfer joint and the opening assembly based on the oil and gas well parameters of the oil and gas well to be tested, and assembling the oil and gas well testing equipment; lowering the oil pipe and the oil and gas well testing equipment to the oil and gas well testing equipment to be tested Preset position in the well; pressurize the annular space between the tubing and the casing in the oil and gas well to be tested until the pressure in the annular space allows the perforating assembly to complete perforation; obtain the fluid to be tested and calculate the to-be-tested oil and gas well Test parameters. The construction efficiency is improved; the construction cost is reduced, and the components constituting the oil and gas well testing equipment have high pressure and temperature resistance, high operability and safety, increase the controllability of the oil and gas well testing work, and are easy to operate. Helps to speed up the process of oilfield exploration.

Description

Oil and gas well testing equipment and oil and gas well testing method

technical field

The embodiments of the present application relate to the technical field of oil and gas exploitation, and in particular, to an oil and gas well testing equipment and an oil and gas well testing method.

Background technique

In the process of oil and gas production, it is usually necessary to conduct production testing of oil and gas wells before the formal production, to obtain parameters such as production, pressure, temperature, and liquid properties of the test layer, so as to select appropriate equipment and methods for subsequent production.

In the related art, a common oil and gas well testing method is the full-bore (Annular Pressure Responsive, APR) test, that is, in the case of not moving the tubing string, pressurization and pressure relief are performed through the annulus between the tubing and the casing to achieve The test valve of the downhole APR test tool is turned on and off multiple times to obtain test parameters.

However, the current APR testing process is complex, the construction steps are cumbersome, and the APR testing tool has a complex structure and high cost, which is not conducive to improving the testing efficiency of oil and gas wells under the current situation of strengthening the development of new petroleum areas.

SUMMARY OF THE INVENTION

The embodiments of the present application provide an oil and gas well testing equipment and an oil and gas well testing method. The technical solution is as follows:

On the one hand, an embodiment of the present application provides an oil and gas well testing equipment, and the oil and gas well testing equipment includes:

Rupture disc circulation valve, used to provide a flow path for the fluid to be tested in the open state;

a pressure transmission joint for transmitting the axial pressure of the oil and gas well testing equipment, and one end of the pressure transmission joint close to the wellhead is connected to the end of the pressure gauge holder close to the bottom of the well;

A mechanical packer for separating the annular space between the oil and gas well testing equipment and the corresponding casing of the oil and gas well to be tested, the mechanical packer is located between the pressure transfer joint and the opening assembly ;

the hole-opening component is used to provide a flow channel for the fluid to be tested in an open state;

a perforating assembly for perforating the oil and gas well to be tested;

The bottom end of the positioning sub is connected to the wellhead end of the rupture disk circulation valve through a first connecting pipe, and the shock absorber is connected to the wellhead end of the shock absorber. The second connecting pipe is connected.

In an optional embodiment, one end of the oil and gas well testing equipment near the wellhead is connected to the oil pipe, and one end of the oil and gas well testing equipment near the bottom of the well is provided with a wire plug, and the wire plug is used to seal the oil and gas well Test Equipment.

In an optional embodiment, the aperture assembly includes:

a pressure transmission pipe for transmitting the axial pressure in the oil and gas well testing equipment;

an upper joint for fixed connection with the mechanical packer;

an outer cylinder, the outer cylinder is provided with a pressure transmission hole for providing a flow channel for the fluid to be tested;

a first sealing ring, used for sealing the gap between the upper joint and the outer cylinder;

a sliding sleeve, wherein an inner hole for providing a flow channel for the fluid to be tested is provided in the sliding sleeve;

a pin assembly for fixedly connecting the sliding sleeve and the outer cylinder;

a second sealing ring, used for sealing the gap between the lower joint and the outer cylinder;

A lower joint for fixedly connecting with a shock absorber, the shock absorber being arranged between the opening assembly and the perforating assembly, the shock absorber being used to reduce the vibration intensity of the oil and gas well testing equipment ;

The sliding sleeve sealing ring is used for sealing the gap between the sliding sleeve, the pressure transmission pipe and the lower joint.

In an optional embodiment, the number of the pressure transmission holes and the inner holes are the same, and when the pin assembly is in a broken state, the pressure transmission holes and the inner holes are in one-to-one correspondence.

In an optional embodiment, the perforating assembly includes an ignition device and a perforating gun, the ignition device contains time-delayed gunpowder and explosives, and the ignition device is used for igniting the said ignition device when a preset pressure condition is reached Delayed gunpowder, which is used to ignite the explosive, and the explosive is used to power the perforating gun, which is used to test the to-be-tested when a preset power condition is reached Oil and gas wells are perforated.

On the other hand, an embodiment of the present application provides a method for testing oil and gas wells, the method comprising:

Based on the oil and gas well parameters of the oil and gas well to be tested, determine the size of the rupture disc circulation valve, the pressure transfer joint and the opening assembly, and assemble the oil and gas well testing equipment, the oil and gas well parameters include the testing depth, and the oil and gas well testing equipment consists of The rupture disk circulation valve, the pressure transfer joint, the mechanical packer, the perforation assembly and the perforation assembly are composed;

lowering the oil pipe and the oil and gas well testing equipment to a preset position in the oil and gas well to be tested, and the oil and gas well testing equipment is connected with the bottom end of the oil pipe;

pressurizing the annular space between the tubing and the casing in the oil and gas well to be tested until the pressure in the annular space causes the perforating assembly to complete perforating;

The fluid to be tested is acquired and the parameters to be tested of the oil and gas well to be tested are calculated.

In an optional embodiment, before the oil pipe and the oil and gas well testing equipment are lowered to a preset position in the oil and gas well to be tested, the method includes:

The oil and gas well to be tested is passed through the oil pipe, and a scraper is installed on the outer wall of the oil pipe;

The scraper is used to scrape the inner wall of the casing pipe section corresponding to the mechanical packer.

In an optional embodiment, the oil and gas well testing equipment is further provided with a positioning sub;

The lowering of the tubing and the oil and gas well testing equipment to a preset position in the oil and gas well to be tested includes:

In response to reaching a preset number of scraping times or the inner diameter of the casing corresponding to the pipe section of the mechanical packer is greater than the outer diameter of the scraper, connecting the oil pipe and the oil and gas well testing equipment and starting to run down;

Each time the preset depth is lowered, a liquid cushion is added in the oil pipe, and the liquid cushion is used to balance the pressure on the inner and outer sides of the oil pipe;

In response to the oil and gas well testing equipment being lowered to the preset position, the positioning sub is used to calibrate the position of the oil and gas well testing equipment.

In an optional embodiment, the annular space between the tubing and the casing in the oil and gas well to be tested is pressurized until the pressure in the annular space causes the perforating assembly to complete perforating ,include:

installing a test tree for the tubing and the casing at the wellhead of the oil and gas well to be tested;

The annular space between the tubing and the casing is pressurized until the perforating assembly completes perforating.

In an optional embodiment, after acquiring the fluid to be tested and calculating the parameters to be tested of the oil and gas well to be tested, the method includes:

Pressurizing the annular space between the oil pipe and the casing until the rupture disk circulation valve is opened, and performing well flushing and well killing operations on the oil and gas well to be tested;

In response to the completion of the well flushing and well killing operations, the oil and gas well testing equipment is removed from the well to be tested.

The beneficial effects brought by the technical solutions provided in the embodiments of the present application include at least:

In the embodiment of the present application, the oil and gas well testing equipment is assembled by using relatively mature and low-cost tools and components, which can adjust the size of some components according to specific well conditions, and has a wide range of applications, especially for offshore oil testing operations, which improves the construction efficiency. It is efficient, and the components that constitute the oil and gas well testing equipment have high pressure and temperature resistance, high operability and safety, and solve the complex technical process, complex tool structure, cumbersome construction steps and equipment costs related to APR testing. The high problem increases the controllability of the oil and gas well testing work, and the operation is convenient, which helps to speed up the process of oilfield exploration.

Description of drawings

1 is a schematic structural diagram of an oil and gas well testing equipment provided by an exemplary embodiment of the present application;

2 is a schematic structural diagram of an oil and gas well testing equipment provided by another exemplary embodiment of the present application;

3 is a schematic structural diagram of a hole opening device provided by an exemplary embodiment of the present application;

4 is a flow chart of a method for testing oil and gas wells provided by an exemplary embodiment of the present application;

FIG. 5 is a flow chart of a method for testing oil and gas wells provided by another exemplary embodiment of the present application.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

As used herein, "plurality" refers to two or more. "And/or", which describes the association relationship of the associated objects, means that there can be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, A and B exist at the same time, and B exists alone. The character "/" generally indicates that the associated objects are an "or" relationship.

In the related art, a common oil and gas well testing method is APR testing, that is, under the condition of not moving the tubing string, pressurizing and depressurizing through the annulus between the tubing and the casing to realize the test valve of the downhole APR testing tool multiple times. Switch well operations to obtain test parameters. However, the current APR testing process is complex, the construction steps are cumbersome, and the APR testing tool has a complex structure and high cost, which is not conducive to improving the testing efficiency of oil and gas wells under the current situation of strengthening the development of new petroleum areas.

In order to solve the above technical problems, the embodiments of the present application provide an oil and gas well testing equipment and an oil and gas well testing method, which can reduce the oil and gas well testing cost and improve the oil and gas well testing efficiency. FIG. 1 shows a structural side view of the oil and gas well testing equipment provided by an exemplary embodiment of the present application.

As shown in FIG. 1 , the oil and gas well testing equipment at least includes: rupture disk circulation valve 104 , pressure transfer joint 106 , mechanical packer 107 , perforation assembly 108 , and perforation assembly 111 . Among them, the rupture disc circulation valve 104 is used to provide a flow channel for the fluid to be tested in an open state. The pressure transmission joint 106 is used to transmit the axial pressure of the oil and gas well testing equipment, and the end of the pressure transmission joint 106 near the wellhead is connected with the end of the pressure gauge holder 105 near the bottom of the well. The mechanical packer 107 is used to separate the annular space between the oil and gas well testing equipment and the corresponding casing of the oil and gas well to be tested, to obtain an annular space 115a and a closed annular space 115b, and the mechanical packer 107 is located in the pressure transfer joint 106 and the opening assembly between 108. The aperture assembly 108 is used to provide a flow channel for the fluid to be tested in the open state. The perforating assembly 111 is used for perforating the oil and gas well to be tested, and the perforating assembly 111 includes a firing head 111a and a perforating gun 111b. The oil and gas well testing equipment is shown without contact with the bottom hole 113 .

As shown in FIG. 2 , optionally, the oil and gas well testing equipment may also be provided with a positioning sub 102, and the positioning sub 102 is used to correct the position of the oil and gas well testing equipment in the oil and gas well to be tested. Optionally, a pressure gauge holder 105 can also be provided in the oil and gas well testing equipment, and the pressure gauge holder 105 is used to carry the pressure gauge. connected. Optionally, a shock absorber 109 may also be provided in the oil and gas well testing equipment. The shock absorber 109 is used to reduce the vibration intensity of the oil and gas well testing equipment. connected. Fig. 2 only shows a setting mode of the positioning sub, the pressure gauge holder and the shock absorber in the oil and gas well testing equipment, in other possible implementations, the positioning sub, the pressure gauge holder and the shock absorber It may also be set at other positions of the oil and gas well testing equipment, which is not limited in this embodiment of the present application.

In a possible implementation manner, the bottom end of the positioning sub is connected to the wellhead end of the rupture disc circulation valve through a first connecting pipe, and the shock absorber is close to the bottom hole and the perforation assembly is close to the wellhead. connected by a second connecting pipe.

The working principle of the oil and gas well equipment provided by the embodiments of the present application will be described in detail below:

After the oil and gas well testing equipment reaches the preset position in the oil and gas well to be tested, the mechanical packer in the setting state separates the annular space between the oil and gas well testing equipment and the casing, as shown in Figure 1, the oil and gas well testing equipment The annular space with the inner wall of the sleeve 114 is divided into an upper annular space 115a and a lower sealed annular space 115b. Among them, the casing is the steel pipe used to support the wall of the oil and gas well, so as to ensure the normal operation of the entire oil well after the drilling process and completion.

When the pressure in the annular space between the tubing, the oil and gas well testing equipment and the casing increases, the pressure on the oil and gas well testing equipment increases, and the pressure transmission joint transmits the pressure axially to the opening assembly 108, so that the opening assembly 108 The perforation state is reached under the action of pressure, thereby providing a channel for fluid circulation; at the same time, when the pressure value reaches the perforation condition, the perforating assembly performs lateral perforation on the casing pipe wall and the well wall of the oil and gas well to be tested. Under the action of formation pressure, the fluid in the outer formation automatically flows into the closed annular space between the oil and gas well testing equipment and the casing through the holes in the well wall and the casing wall. When the fluid in the closed annular space gradually increases, When reaching the drilling equipment, it flows into the oil and gas well testing equipment through the drilling equipment. After the formation fluid flows into the well and the oil and gas well testing equipment, the construction personnel can obtain the corresponding fluid production, pressure, temperature, fluid properties and waiting test parameters of the oil and gas well to be tested according to the data collected by the oil and gas well testing equipment. Illustratively, measuring instruments such as temperature instruments and gamma instruments may also be set in the oil and gas well testing equipment.

In a possible implementation, at least one storage-type electronic pressure gauge is carried in the pressure gauge holder, the pressure gauge can collect and store pressure values, and store the measured pressure values, which is convenient for construction personnel to The pressure gauge is removed and the stored pressure value is read.

In a possible implementation, one end of the oil and gas well testing equipment near the wellhead is connected to the tubing, and one end of the oil and gas well testing equipment near the bottom of the well is provided with a plug, which is used to seal the oil and gas well testing equipment.

FIG. 3 shows an axial cross-sectional view of a borehole assembly in an oil and gas well testing device provided by an exemplary embodiment of the present application.

The hole opening assembly includes: a pressure transmission tube 301, an upper joint 302, an outer cylinder 303, a first sealing ring 304, a pin assembly 305, a sliding sleeve 308, a second sealing ring 309, a sliding sleeve sealing ring 310 and a lower joint 311, wherein, The outer cylinder 303 is provided with a pressure transmission hole 306 radially penetrating the cylinder wall, and the sliding sleeve 308 is provided with an inner hole 307 radially penetrating the tube wall of the sliding sleeve 308 . The pressure transfer tube 301 is used to transmit the axial pressure in the oil and gas well testing equipment. The upper joint 302 is used for fixed connection with the mechanical packer 107 in FIG. 1 . The first sealing ring 304 is used to seal the gap between the upper joint 302 and the outer cylinder 303 . The pin assembly 305 is used for fixedly connecting the sliding sleeve 308 and the outer cylinder 303 . The second sealing ring 309 is used to seal the gap between the lower joint 311 and the outer cylinder 303 . The lower joint 311 is used for fixed connection with the shock absorber 109 in FIG. 1 . The sliding sleeve sealing ring 310 is used to seal the gap between the sliding sleeve 308 , the pressure transmission pipe 301 and the lower joint 311 .

In a possible implementation manner, the number of the pressure transmission holes and the inner holes are the same, and when the pin assembly is in a broken state, the pressure transmission holes and the inner holes are in one-to-one correspondence.

The working principle of the perforated assembly provided by the embodiment of the present application will be described in detail below:

The pressure transmission pipe in the perforated assembly is used to transmit the pressure of the oil and gas well acquisition equipment in the axial direction. When the pressure value in the annular space above the mechanical packer increases, the pressure value transmitted by the pressure transmission pipe increases, and the pressure transmitted by the pressure transmission pipe increases. When the transmitted pressure value reaches the pressure value corresponding to the fracture condition of the pin assembly, the pin assembly is cut off. At this time, the sliding sleeve moves upward under the action of pressure, and is blocked by the upper joint when the upper end of the sliding sleeve reaches the convex surface of the upper joint. The inner hole in the sliding sleeve just communicates with the pressure transmission hole in the outer cylinder in a one-to-one correspondence, so that the fluid in the well flows into the opening assembly and then flows upward into the oil pipe.

In a possible implementation, the perforating assembly includes an ignition device and a perforating gun, the ignition device contains delayed powder and explosives, the ignition device is used to ignite the delayed powder when a preset pressure condition is reached, and the delayed powder It is used to ignite the explosive, which is used to power the perforating gun, which is used to perforate the oil and gas well to be tested when a preset power condition is reached.

Wherein, the ignition device is a pressurized ignition device. When the pressure received by the ignition device reaches a preset pressure condition, the delay gun powder is ignited, and the delay gun powder burns out and ignites the explosive after burning for a certain period of time (usually 6 to 10 minutes). , so as to provide power for the perforating gun, so that the perforating gun shoots the perforating projectile laterally, penetrates the casing and the well wall, and provides a channel for the fluid in the formation.

To sum up, the components used in the oil and gas well testing equipment provided by the embodiments of the present application are relatively mature, have low manufacturing costs, and have a wide range of applications, especially for offshore oil testing operations, improve construction efficiency, and constitute oil and gas well testing equipment. The components have high pressure and temperature resistance, high operability and safety, and solve the problems of complex APR testing and other related technologies, complex tool structure, cumbersome construction steps and high equipment costs, increasing the number of oil and gas wells. The controllability of the test work and the convenient operation help to speed up the process of oilfield exploration.

FIG. 4 shows a flow chart of a method for testing oil and gas wells provided by an exemplary embodiment of the present application. The embodiment of the present application is described by taking the method applied to the oil and gas well testing equipment shown in FIG. 1 as an example, and the method includes:

Step 301 , determine the size of the rupture disk circulation valve, the pressure transfer joint and the opening assembly based on the oil and gas well parameters of the oil and gas well to be tested, and assemble the oil and gas well testing equipment. The oil and gas well parameters include the test depth.

Among them, the oil and gas well testing equipment is the oil and gas well testing equipment shown in Figure 1, which is composed of a rupture disk circulation valve, a pressure transfer joint, a mechanical packer, a perforation component, and a perforation component.

The construction personnel first need to determine the depth of the layer to be tested in the oil and gas well to be tested, and then determine the size of the rupture disc circulation valve, pressure transfer joint and opening assembly according to the depth. After the components required for the oil and gas well testing equipment are prepared, the construction personnel assemble the oil and gas well testing equipment according to the structure of the oil and gas well testing equipment shown in Figure 1, and check the tightness of the equipment.

Step 402 , lower the oil pipe and the oil and gas well testing equipment to a preset position in the oil and gas well to be tested, and the oil and gas well testing equipment is connected to the bottom end of the oil pipe.

After the oil and gas well testing equipment is assembled, the construction personnel connect it with the oil pipe, and lower the oil and gas well testing equipment from the casing to the preset position in the oil and gas well to be tested, that is, lower the perforating components in the oil and gas well testing equipment to the required position. Depth of perforation.

Step 403 , pressurize the annular space between the tubing and the casing in the oil and gas well to be tested, until the pressure in the annular space enables the perforating assembly to complete the perforation.

When the oil and gas well testing equipment reaches the preset position, the construction personnel open the mechanical packer, so that the mechanical packer expands and seals the annular space between the oil and gas well testing equipment and the casing, and the mechanical packer goes down to the bottom of the well The annular space is closed.

After the setting is completed, the construction personnel pressurize the annular space above the mechanical packer. In the embodiment of the present application, the personnel directly pressurize the wellhead, that is, the liquid used for washing and killing the well in the previous oil and gas well is used for direct pressure transfer. Complete perforation. After the pressure value of the oil and gas well testing equipment reaches the pressure value required by the perforation conditions, the casing pipe wall and the well wall are laterally perforated through the perforating assembly, so that the fluid in the formation flows into the airtight seal below the oil and gas well to be tested through the holes. in annular space.

In step 404, the fluid to be tested is acquired and the parameters to be tested of the oil and gas well to be tested are calculated.

In the process of pressurizing the annular space, the hole-opening component in the oil and gas well testing equipment enters the hole-opening state under the action of pressure, that is, the inner hole is connected with the pressure transmission hole, which provides a flow channel for the fluid to be tested in the well, and completes the fluid flow. Circulation in the well. The construction personnel seek production after the perforation is completed, and shut down the well and measure the pressure after obtaining the parameters to be tested.

To sum up, in the embodiments of the present application, the oil and gas well testing equipment is assembled by using relatively mature and low-cost tools and components, and the size of some components can be adjusted according to specific well conditions, and has a wide range of applications, especially for offshore oil testing. The operation improves the construction efficiency, and the components constituting the oil and gas well testing equipment have high pressure and temperature resistance, high operability and safety, and solve the complex technology, complex tool structure and cumbersome construction steps of APR testing and other related technologies. As well as the high cost of equipment, the controllability of oil and gas well testing work is increased, and the operation is convenient, which helps to speed up the process of oilfield exploration.

Fig. 5 shows a flow chart of a method for testing oil and gas wells provided by another exemplary embodiment of the present application. The embodiments of the present application are described by taking the method applied to the oil and gas well testing equipment shown in FIG. 2 as an example, and the method includes:

Step 501 , determine the size of the rupture disc circulation valve, the pressure transfer joint and the opening assembly based on the oil and gas well parameters of the oil and gas well to be tested, and assemble the oil and gas well testing equipment, where the oil and gas well parameters include the test depth.

For the specific implementation of step 501, reference may be made to the foregoing step 401, and details are not described herein again in this embodiment of the present application.

In step 502, the oil and gas well to be tested is passed through the oil pipe, and a scraper is installed on the outer wall of the oil pipe.

Drilling a well refers to dredging a wellbore. When carrying out some downhole operations (such as well logging, casing running, etc.), in order to ensure the success of the operation, it is often necessary to open the well first. The method of opening the well is to run the drilling tool into the well, and use the drilling tool to pass through the wellbore to make the wellbore unblocked. In the embodiment of the present application, the oil and gas well to be tested is passed through the oil pipe. In a possible implementation manner, a casing scraper is provided on the outer wall of the oil pipe for scraping the casing after the well is passed.

Step 503, using a scraper to scrape the inner wall of the casing pipe section corresponding to the mechanical packer.

Scraping refers to the operation of running a pipe string with a scraper in the well, scraping the inner wall of the casing, and removing the cement, hard wax, salt scale and other debris on the inner wall of the casing. The purpose is to make the inner wall of the casing smooth and unobstructed. Run tools such as oil and gas well testing equipment to clear obstacles.

In a possible implementation, in the oil and gas well testing equipment of the examples of the present application, the mechanical packer is the component with the largest diameter. Therefore, after passing the well, the construction personnel need to scrape the inner wall of the complete casing, namely From the wellhead to the bottom of the well, it is also necessary to additionally scrape the inner wall of the casing section corresponding to the mechanical packer.

Step 504, in response to the preset scraping times, connect the tubing and the oil and gas well testing equipment and start running.

Illustratively, in the embodiment of the present application, the construction personnel perform at least three scraping operations on the inner wall of the casing pipe section corresponding to the mechanical packer. When the scraping operation is complete, the tubing is withdrawn from the well and the oil and gas well testing equipment connected to the tubing is lowered into the well.

In a possible embodiment, when the oil and gas well testing equipment is located on the ground, the rupture disc circulation valve is in a closed state, the pressure difference between the inner and outer pressures of the rupture disc circulation valve is 0, the inner and outer pressures are balanced, and the hole opening device is in the downhole is also closed.

Step 505 , adding a liquid cushion in the oil pipe every time the preset depth is lowered, and the liquid cushion is used to balance the pressure on the inner and outer sides of the oil pipe.

In the process of lowering the tubing string, the construction personnel add a liquid cushion to the tubing for each preset depth, so as to balance the internal and external pressure of the tubing in the well and prevent the tubing from being too large due to the excessive pressure difference between the inner and outer pressure during the lowering process and the subsequent pressurization process. and rupture.

Illustratively, the construction personnel add a liquid cushion every time 10 columns of oil pipes (ie, 100m) are lowered, until they are lowered to the design depth calculated according to the negative pressure. During the deployment process, the on-site technicians need to closely observe the well conditions in the annular space to determine whether there is any leakage of the downhole pipe string.

Step 506, in response to the oil and gas well testing equipment being lowered to a preset position, use the positioning sub to calibrate the position of the oil and gas well testing equipment.

When the oil and gas well testing equipment is lowered to a preset position, it is necessary to further accurately calibrate the position of the oil and gas well testing equipment. In a possible implementation, the oil and gas well testing equipment is further provided with a positioning sub, and the construction personnel use the positioning sub to position the oil and gas well testing equipment.

Usually, the pipeline positioning in oil and gas wells adopts the method of magnetic positioning, and uses the rays emitted by the natural radioactive substances contained in the formation itself to determine the position of the positioning subsection.

After the calibration work was completed, construction crews inflated the mechanical packer to seal the annular space between the setting casing and the well testing equipment.

Step 507, install a test tree for the tubing and casing at the wellhead of the oil and gas well to be tested.

When the construction personnel ensure that the oil and gas well testing equipment reaches the preset position and the mechanical packer is correctly clamped, install the test tree at the wellhead of the oil and gas well to be tested, set the wellhead position, and connect the blowout preventer and blowout preventer to the upper part. and other equipment, the lower part is connected with the tubing, and the flow head is usually equipped with a rotating sub, which is used to rotate the lower tubing string, such as a packer, etc., so as to control the tubing in the well and the oil and gas well testing equipment.

Step 508, pressurize the annular space between the tubing and the casing until the perforating assembly completes the perforation.

In one possible implementation, the construction crew pressurizes the annular space between the tubing and the casing until the perforating assembly completes the perforation. For the pressurization process, reference may be made to the foregoing step 403, and details are not described herein again in this embodiment of the present application.

Step 509: Acquire the fluid to be tested and calculate the parameters to be tested of the oil and gas well to be tested.

For the specific implementation manner of step 509, reference may be made to the foregoing step 409, and details are not described herein again in this embodiment of the present application.

Step 510 , pressurize the annular space between the tubing and the casing until the rupture disk circulation valve is opened, and perform well flushing and well killing operations on the oil and gas well to be tested.

After the test is completed, the construction personnel need to carry out back pressure from the annular space between the tubing and the casing, and open the rupture disc circulation valve to complete the fluid circulation of the fluid to be tested in the well.

In a possible implementation, in order to prevent the dirt attached to the inner wall of the oil and gas well to be tested (the inner wall of the casing) from polluting the environment and affecting the operation safety, etc., the construction personnel need to remove the oil pipe and the oil and gas well testing equipment before pulling out the oil pipe and the oil and gas well testing equipment. Clean the inside and outside of the oil and gas well testing equipment, that is, carry out the cleaning operation; while the killing is to make the static night column pressure in the wellbore greater than or equal to the formation pressure, so as to obtain enough safe time to complete the wellhead disassembly, take out the tubing and oil and gas well testing equipment, restore Wellhead and other operations to ensure operational safety.

Step 511 , in response to the completion of the well flushing and well killing operations, remove the oil and gas well testing equipment from the oil well to be tested.

When the cleaning and killing operations are completed, the construction personnel take out the oil and gas well testing equipment from the oil well to be tested, and restore the wellhead to complete the oil and gas well testing operation.

In the embodiment of the present application, the steps of using oil and gas well testing equipment to perform pressure-controlled perforation testing are relatively simple and easy to operate, and the test can be completed in one downhole operation, which improves the efficiency of oil and gas well testing; It is necessary to adjust the size of some components in the oil and gas well testing equipment, which improves the application scope and utilization rate of the oil and gas well testing equipment, and further reduces the realization cost of the oil and gas well testing work.

The above descriptions are only optional embodiments of the present application, and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection of the present application. within the range.

Claims (10)

1. An oil and gas well testing apparatus, comprising:

a burst disk circulation valve for providing a flow path for a fluid to be tested in an open state;

the pressure transmission joint is used for transmitting the axial pressure of the oil-gas well testing equipment, and one end of the pressure transmission joint, which is close to a well head, is connected with one end of the pressure gauge support cylinder, which is close to a well bottom;

the mechanical packer is used for separating an annular space between the oil-gas well testing equipment and the sleeve corresponding to the oil-gas well to be tested, and is positioned between the pressure transmission joint and the opening component;

the opening component is used for providing a flow channel for the fluid to be tested in an opening state;

the perforation assembly is used for perforating the oil-gas well to be tested;

one end of the positioning short joint close to the well bottom is connected with one end of the rupture disc type circulating valve close to the well top through a first connecting pipe, and one end of the shock absorber close to the well bottom is connected with one end of the perforation assembly close to the well top through a second connecting pipe.

2. An oil and gas well test device as claimed in claim 1, wherein the end of the oil and gas well test device near the well head is connected with an oil pipe, the end of the oil and gas well test device near the well bottom is provided with a plug, and the plug is used for sealing the oil and gas well test device.

3. The oil and gas well testing apparatus of claim 1, wherein the opening assembly comprises:

the pressure transmission pipe is used for transmitting axial pressure in the oil-gas well testing equipment;

the upper joint is used for fixedly connecting with the mechanical packer;

the outer cylinder is provided with a pressure transfer hole for providing a flow channel for the fluid to be tested;

the first sealing ring is used for sealing a gap between the upper joint and the outer cylinder;

the sliding sleeve is internally provided with an inner hole for providing a flow channel for the fluid to be tested;

the pin assembly is used for fixedly connecting the sliding sleeve and the outer cylinder;

the second sealing ring is used for sealing a gap between the lower joint and the outer cylinder;

the lower joint is fixedly connected with a shock absorber, the shock absorber is arranged between the hole opening assembly and the perforation assembly, and the shock absorber is used for reducing the vibration intensity of the oil and gas well testing equipment;

and the sliding sleeve sealing ring is used for sealing a gap between the sliding sleeve and the pressure transmission pipe and between the sliding sleeve and the lower joint.

4. An oil and gas well testing device as claimed in claim 3, wherein the number of the pressure transmitting holes is the same as that of the inner holes, and the pressure transmitting holes are communicated with the inner holes in a one-to-one correspondence when the pin assembly is in a broken state.

5. The oil and gas well testing equipment according to any one of claims 1 to 4, wherein the perforation assembly comprises an ignition device and a perforating gun, the ignition device contains time-delay gunpowder and explosive, the ignition device is used for igniting the time-delay gunpowder when a preset pressure condition is reached, the time-delay gunpowder is used for igniting the explosive, the explosive is used for providing power for the perforating gun, and the perforating gun is used for perforating the oil and gas well to be tested when a preset power condition is reached.

6. An oil and gas well testing method, wherein the method is performed based on the oil and gas well testing apparatus of any one of claims 1 to 5, the method comprising:

determining the sizes of a rupture disc type circulating valve, a pressure transmission joint and a hole opening component based on oil and gas well parameters of an oil and gas well to be tested, and assembling oil and gas well testing equipment, wherein the oil and gas well parameters comprise testing depth, and the oil and gas well testing equipment consists of the rupture disc type circulating valve, the pressure transmission joint, a mechanical packer, the hole opening component and a perforation component;

lowering an oil pipe and the oil-gas well testing equipment to a preset position in the oil-gas well to be tested, wherein the oil-gas well testing equipment is connected with the bottom end of the oil pipe;

pressurizing an annular space between the oil pipe and a casing in the oil-gas well to be tested until the pressure in the annular space enables the perforation assembly to complete perforation;

and acquiring the fluid to be tested and calculating the parameters to be tested of the oil-gas well to be tested.

7. The method of claim 6, wherein prior to lowering the tubing and well testing apparatus to a predetermined position in the well to be tested, the method comprises:

the oil pipe is used for drifting the oil-gas well to be tested, and a scraper is mounted on the outer wall of the oil pipe;

and scraping the inner wall of the mechanical packer corresponding to the casing pipe section by using the scraper.

8. The method of claim 7, wherein a locating sub is also provided in the oil and gas well testing apparatus;

with oil pipe with oil gas well test equipment transfers to the preset position in the oil gas well of awaiting measuring includes:

connecting the oil pipe and the oil and gas well testing equipment and starting to lower in response to reaching the preset scraping times;

adding a liquid cushion in the oil pipe every time the oil pipe is lowered by a preset depth, wherein the liquid cushion is used for balancing the pressure of the inner side and the outer side of the oil pipe;

and responding to the lowering of the oil and gas well testing equipment to the preset position, and utilizing the positioning short section to calibrate the position of the oil and gas well testing equipment.

9. The method of any one of claims 6 to 8, wherein pressurizing an annulus between the tubing and a casing in the well to be tested until pressure in the annulus causes the perforation assembly to complete a perforation, comprises:

installing a test tree for the oil pipe and the casing at the wellhead of the oil-gas well to be tested;

pressurizing an annular space between the tubing and the casing until the perforation assembly completes perforation.

10. The method according to any one of claims 6 to 8, wherein after said obtaining of said fluid to be tested and calculating of said parameters to be tested of the hydrocarbon well to be tested, the method comprises:

pressurizing an annular space between the oil pipe and the casing pipe until the rupture disc type circulating valve is opened, and performing well flushing and killing operations on the oil and gas well to be tested;

and in response to the completion of the well flushing and killing operation, removing the oil and gas well testing equipment from the well to be tested.

Images