A method of measuring pressure with calibration control when firing perforating-explosive devices and stand-alone recorder pressure for its implementation

 

The invention relates to the oil industry and can be used for registration of the change in time of the pressure in the well when conducting perforating operations. The technical result of the invention is to improve the reliability and accuracy of registration of fast process operation perforating-explosive devices (PVA) different types of speeds which differ by several orders of magnitude, and the associated pressure changes in the borehole with the operational control calibration of the pressure sensor in the downhole conditions. For this purpose establish a stand-alone recorder pressure (DGS) on the logging cable at a distance, safe from the high temperature zone of impact for each type of PVA are determined by calculation from the mass of fuel or explosive charge in it. For operational calibration of the pressure sensor produces a stop DGS to record the hydrostatic pressure at scheduled points during the descent, and when lifting ARD after actuation of PVA. After processing the recorded information using the system software compares the values of hydrostatic pressure points stop with the estimated value is u se standalone DVR pressure allows you to quickly and securely lock the Registrar on the logging cable at any given distance from the perforating-explosive device. 2 S. and 1 C.p. f-crystals, 3 ill.

The invention relates to the oil industry and can be used to register the pressure in the well when conducting perforating operations, particularly when the impact on the formation of different pressure generator with the purpose of stimulation in oil and gas wells, as well as for recording the fact and completeness of the cumulative operation of drills used for drilling.

Registration of change of pressure in the borehole over time you can get important information about the triggering of the perforating-explosive device (PVA), about the time of stimulation, fracturing in the works for the purpose of stimulation, to reliably control over the work of the PVA and to promptly take the decision to conduct further operations. The effectiveness of conducting perforating operations in oil and gas wells can be significantly enhanced with continuous monitoring of the parameters occurring in the borehole processes, in particular pressure, and increase safety.

The known method gothicrainbow stimulation [1], where fast combustion processes reg the logging cable and start the supply of electric current on the cable simultaneously with the node of the ignition charge.

The disadvantage of this method is the inability to use it with different types of PVA. Upon stimulation with the use of a pressure generator, a liquid fuel-oxidizer compositions or in the application of cumulative drills for drilling, you need the electronic unit to be positioned at different distances from the apparatus, which differ by the order because of possible high-temperature. The time of combustion of the charge in a variety of vehicles also differ significantly for detailed registration of fast process, it is necessary to provide a different recording speeds that differ by several orders of magnitude and is determined by the speed of thermochemical decomposition of various fuels and explosives. In this way the feature is not available. In addition, when triggered PVA electronic unit is subjected to shock loads, therefore, required additional operational control of its health downhole conditions after each operation, which is also not ensured in this way.

Method [1] is not designed to measure the pressure in the well when triggered PVA of different types in the operational monitoring of health dacha of the present invention, related to method, is to ensure reliability and accuracy of registration of fast process of changing the pressure in the well when firing perforating-explosive devices of various types with operational control calibration of the pressure sensor in the downhole conditions.

The technical result is achieved by the fact that the proposed method includes programming modes offline Registrar pressure at different speeds for recording information in an electronic memory for recording the actuation PVA threshold pressure or at a specified time, at least one logging cable Autonomous Registrar pressure and PVA, and the distance between them is chosen by calculation depending on the type of PVA and propellant or explosive charge therein, a descent into the borehole on a logging cable in the interval exposure Autonomous Registrar pressure and PVA, a signal to actuate PVA, lifting and removing standalone DVR pressure from the well and the processing of information recorded on the computer using the system software for the operational calibration of the pressure sensor produces a stop at scheduled points during the descent univelt recorded values of hydrostatic pressure between themselves and with the calculated values of hydrostatic pressure at the point of stopping.

When the write speed fast process 500 to 1,000 measurements per second with high quality register actuating pressure generator of various types, and at a sampling rate of 10,000 samples per second and more, you can register the fact and completeness of the operation of jet guns or vehicles with two modules - punch and gas. This follows from the fact that the combustion of the charge of solid fuel in the well occurs within a fraction of a second, and the detonation of the shaped charges for tens of microseconds.

When triggered PVA in the hole created by the area occupied by the products of combustion of the fuel, where the maximum temperature reaches 1500-3000(The temperature of combustion of different fuel compositions). The upper boundary of this high-temperature region is moved up the borehole at a few tens or hundreds of meters. The lower boundary of the gas field remains stationary or moves down to a few meters (when using liquid fuel-oxidizer compositions is moved to the bottom) depending on the mass of burned fuel and the installation location of PVA in the well. The temperature in this region gradually decreases from the maximum on estvennoj vicinity of PVA, there is a danger of high temperature (>200(C) exposure to products of combustion and output of the Autonomous Registrar pressure of the system, and at great distance from the recorded pressure may be markedly different from the pressure in the processing interval. In this regard, stand-alone recorder pressure should be fixed at the lowest possible safe distance from perforating-explosive device. This distance is determined for each operation is calculated according to the results of mathematical modeling depending on the propellant or explosive substances. For example, for a pressure generator, which uses solid fuel, this distance is in the range of 30-100 m, when using such generators in the liquid fuel-oxidizer compositions 100-150 m, and for jet guns is not more than 30 meters

When triggered, conducting perforating apparatus in a borehole having a large shock load of about 2000 (with a maximum pressure of 100 MPa and the diameter of the Registrar 50 mm), which can damage the electronic unit and disable offline Registrar pressure. Health checks such measuring systems and re-calibration is carried out only in the stationary elaborate determine the reliability of recorded information. For this purpose, according to the proposed method with descent Autonomous Registrar pressure in the well and lifting it after tripping PVA carry out a stop, for example, within 20-40 seconds at scheduled points to receive the "shelves" of pressure. Scheduled points can be evenly distributed through the borehole. The measured hydrostatic pressure at the point of stopping after treatment compared between them and with the calculated values and conclude on the performance of the Registrar and accuracy of all recorded information in the implementation process in the well.

The proposed method helps to eliminate unwanted high temperature effects on stand-alone recorder pressure when triggered PVA and exercise operational control calibration of the pressure sensor.

The known device [2] contains a stand-alone electronic unit, not electrically connected with the cable, including self-powered and Autonomous storage device enclosed in a container that is fixed in the immediate vicinity of the perforating-explosive device.

A disadvantage of this device is its location in the immediate vicinity of the apparatus, therefore, the s stimulation using solid pressure generator. Another disadvantage is the inability of the operational health monitoring electronic unit after each operation in downhole conditions.

Closest to the proposed invention relating to a device offline Registrar pressure is marastoni module for the study of thermodynamic characteristics of wells in the process of perforating operations [3], containing impact-resistant casing, placed in it the pressure sensors, temperature and an electronic unit including a flash memory and a timer for controlling the operating modes, including a mode register pressure in fast combustion of the charge connector for connecting to a computer connecting cable and the battery.

This source indicated the possibility of the descent of the Autonomous Registrar pressure into the well on a cable scraper wire and pipes, and it is made in the form of an adapter between the cable lug and the perforator. This design does not allow to capture the Autonomous recorder pressure on the above mentioned different distances from PVA.

The aim of the invention relating to a device offline Registrar pressure for ucasinogameo distance from the perforating-explosive device while conducting tripping.

This goal is achieved by the fact that in the offline Registrar pressure containing housed in a shockproof casing pressure sensors, temperature and an electronic unit including a flash memory and a timer to control the operation modes, a connector for connection to the PC connection cable and battery power, shock resistant casing made with internal threads on both ends of the two metal plugs that have exterior threads and o-rings for sealing the casing, inside a high-impact casing is hosted chassis, which is fixed to the electronic unit, and one end of the chassis is rigidly connected to one of the plugs, with the channel hydraulic communication with the bore, with each stub has the same casing diameter and a longitudinal cut with a groove for the cable and hole fastening elements and stand-alone recorder pressure is fixed on the cable clamping overhead elements inserted into the longitudinal openings of the plugs and having symmetrically with them holes with threads for mounting elements and the grooves for the cable passing through the outer side surface of the casing.

Distinctive features of the proposed Autonomous Registrar pressure from above we know the plugs, with the channel hydraulic communication with the bore, sealing shockproof casing placed inside the chassis of the two metal plugs with threaded connection and a rubber o rings, as well as fixing of the Autonomous Registrar pressure to the cable by means of a clamping miscellaneous items inserted into the longitudinal openings of the plugs and having symmetrically with them holes with threads for mounting elements and the grooves for the geophysical cable passing through the outer side surface of the casing.

The proposed design of the Autonomous Registrar pressure quickly and safely secure it to the cable at any given distance from PVA, without breaking technological mode when conducting tripping.

In Fig.1 shows a stand-alone recorder pressure, mounted on the logging cable of Fig.2 - chassis with blank, Fig.3 - mounting the invoice element.

Stand-alone recorder pressure contains impact-resistant cylindrical casing 1, placed in it the chassis 6 with the cover 2, cover 3 and pressure overhead elements 4 for fixing the Registrar on the logging cable 5, passing through the outer side surface of the casing. Both sagii casing.

Trough-shaped chassis 6 is rigidly connected with the cover 2, having a fluid channel 10 communication with the borehole. Chassis installed the battery 7, the electronic unit 8, the pressure sensors and temperature 9.

Each of the plugs 2 and 3 has a longitudinal cut with a groove 12 for the cable and the hole 13 under fasteners (bolts). Pressure overhead elements 4 are symmetrically placed with caps, holes 14 with threads for fasteners (bolts) and the grooves 15 for the cable.

Example. You want to measure the pressure in the well when processing a productive formation in the range of 2900 - 2905 m with a density of perforations 24 resp/m generator PGD.BK-100M in the well at a depth of 3000 m

1. Programming stand-alone recorder pressure with the following modes:

- delay auxiliary Registrar pressure in the measurement mode for 30 minutes during the preparatory

operations before descent;

record pressure and temperature with low speed - 1 measurement per second for 1 hour 30 minutes (when descending);

record pressure at high speed - 1000 measurements per second threshold pressure of 40 MPa for 5 minutes (for detection of fast process when the operation of the generator of this type);

record the pressure is in the required fuel mass for fracturing and create fractures was 60 kg, and stand-alone recorder pressure must be removed from the generator at a distance of 70 meters Down on the cable generator into the hole on the estimated distance of 70 m, do stop and fix stand-alone recorder pressure on the cable by means of a clamping miscellaneous items.

3. Down the generator with independent Registrar pressure, stopping at depths of 500 m, 1000 m, 1500 m, 2000 m, 2500 m duration 30-40 seconds each.

4. Give a signal for operation of the generator when it reaches the processing interval.

5. Raise self-contained recorder pressure, stopping at the same depths and with the same duration as in the descent, and remove it from the hole.

6. Disconnect from the pressurized enclosure chassis with the electronic unit, connect it to the computer connection cable, reads the recorded information into a computer and processed using the system software. Document the results of measurements of pressure and temperature with output to the printer. Compare pressure points stop when climbing and make a conclusion about the health of the Autonomous Registrar pressure and accuracy of recording pressure when the operation of the generator.

When carrying out shooting-bursts is ovremenniy information about the failure can take the necessary safety precautions when removing the perforating-explosive device from the well. It is possible to provide a standalone recorder pressure, equipped with a telemetry system for transmitting data on surface and ground for recording readings in real-time. In this version stand-alone recorder pressure is placed in the gap of the geophysical cable on the calculated distance from the perforating-explosive device and connected to the logging cable with two standard connectors under geophysical head.

Thus, the present invention can reliably record the pressure in the well when working with perforating-explosive devices and to carry out operational control calibration Autonomous Registrar pressure in the well.

The proposed method of measuring pressure in a well-controlled calibration and self-contained recorder pressure tested at works well stimulation in the oil wells of different pressure generator solid fuel in the borehole fluid and liquid fuel-oxidizer composition, as well as when working with devices containing the cumulative punch and solid fuel generator pressure applied to the joint perforat is. the manual gothicrainbow stimulation.

2. Utility model RU 30832 U1, E 21 In 43/263. Device for controlling and accounting operations perforating-explosive devices.

3. Mycin M. L., Ter-Sahakyan Century, Technological complex "Caissa" for geophysical and gas dynamic studies of wells on the basis of Autonomous equipment with electronic non-volatile memory. // NTV "Carotenic". Tver: Ed. The AIS. 1998. Vol.43. C. 116-120.

Claims

1. A method of measuring pressure in a well-controlled calibration is triggered when conducting perforating apparatus, characterized in that the programming modes of operation standalone DVR pressure at different speeds for recording information in an electronic memory for recording the actuation perforating-explosive device threshold pressure or at a specified time, set on the same logging cable stand-alone recorder pressure and perforating apparatus, and the distance between them is chosen by calculation, depending on the type of perforating-explosive device and a propellant or an explosive charge therein, lowered into the borehole on a logging cable in the interval of exposure to the space, Breakfast is on the device, raised to the mouth and remove the stand-alone recorder pressure from the well and process the recorded information on the computer's system software, during the descent and the ascent of Autonomous Registrar pressure to produce a stop at scheduled points to write hydrostatic pressure, and after processing the recorded information compare these values with each other and with the calculated values of hydrostatic pressure at the point of stop and make a conclusion about the efficiency and accuracy of recording standalone DVR pressure.

2. Stand-alone recorder pressure containing housed in a shockproof casing pressure sensors, temperature and an electronic unit including a flash memory and a timer to control the operation modes, a connector for connection to the PC connection cable and the battery, wherein the impact resistant cover made with internal threads on both ends of the two metal plugs that have exterior threads and a rubber o ring to seal the casing, inside a high-impact casing is hosted chassis, which is fixed to the electronic unit, and one end of the chassis is rigidly connected to one of satr and longitudinal cut with a groove for the cable and hole fastening elements, and stand-alone recorder pressure is fixed on the cable clamping overhead elements inserted into the longitudinal openings of the plugs and having symmetrically with them holes with threads for mounting elements and the grooves for the cable passing through the outer side surface of the casing.

3. Stand-alone recorder pressure on p. 2, characterized in that when working offline Registrar pressure in real time it is equipped with a telemetry system for transmitting information to the surface by a geophysical cable and two standard connectors for geophysical head for attachment to the cable.

 

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FIELD: oil and gas extractive industry.

SUBSTANCE: device has pipe-like body with detachable upper and lower sleeves. Concentrically to body, with possible rotation relatively to it, a cover is mounted with blades with scrapers placed spirally on its surface. To lower sleeve a reactive end piece is connected with slit apertures. End piece hollow is filled with granulated material engaging in exothermal reaction with acid. Lower portion of end piece is provided with check valve. Upper sleeve is provided with check valve having locking element in form of sphere with shelf and centering elements, to be dropped from well mouth. Base of saddle of check valve is made in form of disc having diameter equal to diameter of body. Pass aperture of saddle in lower portion is overlapped with easily destructible and easily removed element. Length of sphere shelf is greater than height of pass aperture of saddle of check valve of upper sleeve.

EFFECT: higher reliability, higher efficiency, broader functional capabilities of device.

3 cl, 4 dwg, 1 tbl

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