CN110118081B - Gas cut monitoring device and method for marine riser - Google Patents

Abstract

The invention discloses a marine riser gas cut monitoring device and a method, wherein the marine riser gas cut monitoring device comprises a ground host, a data acquisition and transmission system and a power supply system, the data acquisition and transmission system comprises an underwater acoustic communication device, an underwater host, a signal converter and an ultrasonic device, the underwater acoustic communication device comprises an underwater acoustic communication overwater component and an underwater acoustic communication component, and the underwater acoustic communication overwater component is wirelessly connected with the underwater acoustic communication underwater component. The marine riser gas invasion monitoring device disclosed by the invention is characterized in that a power supply system consisting of a power supply switch, a remote awakening device and a battery pack supplies power to an underwater host and an ultrasonic device, so that the power supply of underwater equipment is ensured; the cable connection is not adopted between the above-water equipment and the underwater equipment, but the underwater acoustic communication bidirectional transmission mode is adopted between the above-water equipment and the underwater equipment, so that the underwater installation of the cable along with the marine riser is avoided, the installation difficulty is reduced, the installation time is saved, and the labor consumption is reduced.

Description

A riser gas intrusion monitoring device and method

technical field

The invention relates to the technical field of petroleum exploitation, in particular to a riser gas intrusion monitoring device and method.

Background technique

In the process of oil drilling, blowout accidents are inevitable. In order to strengthen the risk monitoring of blowout accidents, gas intrusion monitoring must be carried out, and the occurrence of well kick, overflow and blowout can be predicted in advance through gas intrusion monitoring. At present, the offshore air intrusion monitoring method includes riser air intrusion monitoring. The air intrusion monitoring point is selected on the riser, the air intrusion monitoring equipment is installed on the pipe wall at the bottom of the riser, and the water part is equipped with a ground host for control and display. The above-water equipment and underwater equipment of the gas intrusion monitoring equipment are connected by cables, and the cables are installed along the riser pipe wall at the same time, which not only provides power, but also serves as a signal transmission channel. The cable connection between the above-water equipment and the underwater equipment ensures the power supply of the underwater equipment, but there are the following problems: the process of lowering the cable into deep water with the riser is time-consuming and cumbersome.

Contents of the invention

The purpose of the present invention is to provide a riser gas intrusion monitoring device and method, which can solve the complicated, time-consuming and labor-intensive installation of cables connecting the above-water equipment and underwater equipment on the basis of ensuring the power supply of the underwater equipment. question.

The invention provides a riser gas intrusion monitoring device, which includes a ground host, a data acquisition and transmission system, and a power supply system. The data acquisition and transmission system includes an underwater acoustic communication device, an underwater host, a signal converter, and an ultrasonic device. The underwater acoustic communication device includes an underwater acoustic communication component and an underwater acoustic communication component, the underwater acoustic communication component is wirelessly connected to the underwater acoustic communication component; the ground host and the underwater acoustic communication The above-water components are all used to be arranged above the water surface, and the underwater acoustic communication above-water components are connected to the ground host by wire; the underwater acoustic communication underwater components, the underwater host, the signal converter and the ultrasonic The devices are all used to be installed underwater, between the ultrasonic device and the signal converter, between the signal converter and the underwater host, and between the underwater host and the underwater acoustic communication underwater components They are sequentially connected by wires; the power supply system is connected with the data acquisition and transmission system by wires.

Further, the power supply system includes a power supply switch, a remote wake-up device and a battery pack, the remote wake-up device has a built-in power supply, the battery pack and the power supply switch are connected by wires, and the power supply switch is connected to the ultrasonic The devices, the battery pack and the underwater host are all connected by wires; the remote wake-up device has a built-in communication interface, and the communication interface of the remote wake-up device communicates with the underwater sound through a communication line. The components are connected, and the remote wake-up device is connected with the power supply switch by wire.

Further, the ultrasonic device includes an ultrasonic sending probe and an ultrasonic receiving probe, the ultrasonic sending probe and the ultrasonic receiving probe are respectively arranged on the outer wall of the riser and are located in the same cross section of the riser; the ultrasonic sending probe and the ultrasonic receiving probe are The power supply switch is connected through a wire, and the ultrasonic receiving probe is connected with the signal converter through a data wire.

Further, the signal converter includes a Doppler signal converter and a digital signal converter connected by wire, the Doppler signal converter is connected to the ultrasonic device by wire, and the digital signal converter is connected to the The underwater host is connected by cable.

The present invention also relates to a riser air intrusion monitoring method, using the above-mentioned riser air intrusion monitoring device, the air intrusion monitoring method includes the following steps:

Step S1: The data acquisition and transmission system, the power supply switch, the remote wake-up device and the battery pack are arranged on the pipe wall of the underwater part of the riser, and the battery pack and the power supply switch are connected by wires, so that The power supply switch and the ultrasonic device, the battery pack and the underwater host are all connected through wires, and the communication interface of the remote wake-up device is connected with the underwater acoustic communication underwater components through communication lines, The remote wake-up device is connected to the power supply switch by wire; the ultrasonic device includes an ultrasonic sending probe and an ultrasonic receiving probe, and the ultrasonic sending probe and the ultrasonic receiving probe are respectively arranged on the outer wall of the riser and located In the same cross section; the ultrasonic sending probe is connected to the power supply switch through a wire, and the ultrasonic receiving probe is connected to the signal converter through a data line;

Step S2: The ground host sends a power switch wake-up signal to the underwater acoustic communication component,

The wake-up signal of the power supply switch is sent wirelessly to the underwater acoustic communication component,

The underwater acoustic communication underwater component transmits the power switch wake-up signal to the remote wake-up device;

The remote wake-up device immediately sends a power supply start signal to the power supply switch after receiving the wake-up signal from the power supply switch;

The power supply switch receives the power supply start signal, and closes the switch;

The ultrasonic device and the underwater host are powered on at the same time, and the underwater host changes from a dormant state to an awakened state;

Step S3: After the ultrasonic device is powered on, the ultrasonic sending probe immediately sends ultrasonic waves;

The ultrasonic receiving probe collects the ultrasonic signal in the riser and sends the ultrasonic echo signal to the signal converter;

Step S4: the signal converter converts the ultrasonic signal into a digital signal, and transmits the digital signal to the underwater host;

Step S5: the underwater host transmits the digital signal to the underwater acoustic communication underwater component;

The underwater acoustic communication underwater component receives the digital signal, and sends the digital signal to the underwater acoustic communication underwater component via wireless;

The underwater acoustic communication water component sends the digital signal to the ground host.

Further, the signal converter includes a Doppler signal converter and a digital signal converter, and the Doppler signal converter and the digital signal converter are connected by wire, and the step S4 includes the following steps:

Step S41: the Doppler signal converter converts the ultrasonic signal into a Doppler signal, and transmits the Doppler signal to the digital signal converter;

Step S42: the digital signal converter converts the Doppler signal into a digital signal, and transmits the digital signal to the underwater host.

Further, the underwater host is connected to the ultrasonic device through a cable, and the frequency at which the ultrasonic receiving probe receives ultrasonic waves is controlled by the underwater host; when the underwater host is in the awakened state, the The underwater main engine has two working modes: low sampling rate mode and high sampling rate mode, and the low sampling rate mode and the high sampling rate mode are switched as the depth of the drill bit penetrates into the formation. Before the high-risk layer of the layer, the underwater host is adjusted to a low sampling rate mode, and the underwater host controls the ultrasonic receiving probe to receive ultrasonic waves at a low frequency; when drilling into a non-reservoir high-risk layer and a reservoir , the underwater host is adjusted to a high sampling rate mode, and the underwater host controls the ultrasonic receiving probe to receive ultrasonic waves at a high frequency.

The beneficial effects of the present invention are:

The invention discloses a riser gas intrusion monitoring device and method. The riser gas intrusion monitoring device designs the underwater acoustic communication device into two parts: the underwater acoustic communication component and the underwater acoustic communication component, and the underwater acoustic communication component is connected to the underwater component The underwater parts of the acoustic communication are connected wirelessly, and then the power supply system is used to supply power to the underwater host and the ultrasonic device, which ensures the power supply of the underwater equipment; the air intrusion monitoring method includes the following steps: first, the ultrasonic device sends out Ultrasonic signal and collect the ultrasonic signal, then convert the ultrasonic signal into a digital signal by the signal converter, transmit the digital signal to the underwater component of the underwater acoustic communication through the underwater host, and send the digital signal to the underwater acoustic communication through wireless components, and finally sent to the ground host. The riser air intrusion monitoring device and method disclosed in the present invention, the power supply system composed of a power supply switch, a remote wake-up device and a battery pack, supplies power for the underwater host and the ultrasonic device, ensuring the power supply of the underwater equipment; the water equipment and There is no cable connection between the underwater equipment, but the two-way transmission method of underwater acoustic communication between the underwater equipment and the underwater equipment, which avoids the installation of cables with the riser, reduces the difficulty of installation, and saves the installation time of cables , reducing manpower consumption and improving the efficiency of gas intrusion monitoring.

Description of drawings

Fig. 1 is a structural schematic diagram of a riser gas intrusion monitoring device provided by the present invention.

Detailed ways

Example 1

Embodiment 1 provides a riser gas intrusion monitoring device, the structure of which will be described in detail below.

Referring to Fig. 1, in order to ensure the power supply of the underwater equipment of the riser gas intrusion monitoring device, the riser gas intrusion monitoring device also includes a power supply system in addition to the ground host 1 and the data acquisition and transmission system, wherein the ground host 1 is installed on the ground to display ultrasonic digital signals and control other equipment; the data acquisition and transmission system is used to transmit and receive ultrasonic waves, and convert ultrasonic signals into digital signals; the power supply system is used to provide power for underwater equipment.

The data acquisition and transmission system includes an underwater acoustic communication device 2, an underwater host 3, a signal converter 4 and an ultrasonic device 5. The underwater acoustic communication device 2 includes an underwater acoustic communication component 21 and an underwater acoustic communication component 22. The underwater acoustic communication The above-water component 21 is set on the ground, and realizes two-way transmission with the underwater acoustic communication underwater component 22 through a wireless connection; 1 through a wired connection; the underwater acoustic communication component 22, the underwater host 3, the signal converter 4 and the ultrasonic device 5 are all used to be installed underwater, between the ultrasonic device 5 and the signal converter 4, and between the signal converter 4 and the The underwater hosts 3, and the underwater host 3 and the underwater acoustic communication underwater component 22 are sequentially connected by wires. Wherein, when the underwater host 3 is not powered on, it is in a dormant state; when the underwater host 3 is powered on, it is in an awakened state.

As a specific embodiment, the ultrasonic device 5 includes an ultrasonic sending probe and an ultrasonic receiving probe, the ultrasonic sending probe and the ultrasonic receiving probe are respectively arranged on the outer wall of the riser and are located in the same cross section of the riser; the ultrasonic sending probe and the power supply switch 6 are connected through wires, and the ultrasonic receiving probe is connected with the signal converter 4 through data wires.

As a specific embodiment, the signal converter 4 includes a Doppler signal converter 41 and a digital signal converter 42 connected by wire, the Doppler signal converter 41 is connected to the ultrasonic device 5 by wire, and the digital signal converter 42 is connected with underwater host 3 by wired. Specifically, the Doppler signal converter 41 may be a DSP module, and the digital signal converter 42 may be an A/D module.

Further, the power supply system includes a power supply switch 6, a remote wake-up device 7 and a battery pack 8. The remote wake-up device 7 is a low-power device with a built-in power supply; the battery pack 8 is composed of a plurality of high-capacity batteries, and is connected with the The power supply switches 6 are connected by wires; the power supply switches 6 and the ultrasonic device 5, the battery pack 8 and the underwater host 3 are all connected by wires; the remote wake-up device 7 has a built-in communication interface, and the communication interface of the remote wake-up device 7 It is connected with the underwater acoustic communication underwater component 22 through a communication line, and the remote wake-up device 7 is connected with the power switch 6 through a cable.

Wherein, the underwater acoustic communication underwater component 22 sends a power switch wake-up signal to the remote wake-up device 7, and the remote wake-up device 7 receives the power switch wake-up signal, and immediately controls the start of the power switch 6;

The power supply switch 6 controls the battery pack 8 to disconnect and close the power supply path of the underwater host 3 and the ultrasonic device 5, so as to realize the power supply to the underwater host 3 and the ultrasonic device 5;

After the ultrasonic device 5 is powered on, the ultrasonic sending probe starts to emit ultrasonic waves. The ultrasonic sensor is fixed on the surface of the outer wall of the riser. The ultrasonic wave passes through the wall of the riser again and is received by the ultrasonic receiving probe;

The signal converter 4 first converts the ultrasonic signal into a Doppler signal, and then converts the Doppler signal into a digital signal; the underwater host 3 transmits the digital signal to the underwater acoustic communication component 22; the underwater acoustic communication component 22 Receive the digital signal, and send the digital signal to the underwater acoustic communication water component 21 via wireless; the underwater acoustic communication water component 21 sends the digital signal to the ground host 1

Example 2

Embodiment 2 provides a riser air intrusion monitoring method, using the above-mentioned riser air intrusion monitoring device, the riser air intrusion monitoring method includes the following steps:

Step S1: The data acquisition and transmission system, the power supply switch 6, the remote wake-up device 7 and the battery pack 8 are arranged on the pipe wall of the underwater part of the riser, and the battery pack 8 and the power supply switch 6 are connected by wires, and the power supply switch 6 and the ultrasonic device 5, the battery pack 8 and the underwater host 3 are all connected by wires, the communication interface of the remote wake-up device 7 is connected with the underwater acoustic communication underwater component 22 through a communication line, and the remote wake-up device 7 is connected with the The power supply switch 6 is connected; the ultrasonic device 5 includes an ultrasonic sending probe and an ultrasonic receiving probe, and the ultrasonic sending probe and the ultrasonic receiving probe are respectively arranged on the outer wall of the riser and are respectively located at two ends of the riser cross section; the ultrasonic sending probe and the power supply switch 6 Connected by a wire, the ultrasonic receiving probe is connected with the signal converter 4 by a data wire;

Step S2: The ground host 1 sends a power switch wake-up signal to the underwater acoustic communication component 21,

The wake-up signal of the power supply switch is sent to the underwater acoustic communication underwater component 22 by wireless,

The underwater acoustic communication underwater component 22 transmits the power switch wake-up signal to the remote wake-up device 7;

The remote wake-up device 7 receives the wake-up signal of the power supply switch, and immediately sends a power supply start signal to the power supply switch 6;

The power supply switch 6 receives the power supply start signal, closes the switch, and the wires connected between the battery pack 8 and the ultrasonic device 5, and between the battery pack 8 and the underwater host 3 are connected;

The ultrasonic device 5 and the underwater host 3 are powered on simultaneously;

Step S3: After the ultrasonic device 5 is powered on, the ultrasonic sending probe immediately sends ultrasonic waves;

The ultrasonic receiving probe collects the ultrasonic signal in the riser and sends the ultrasonic echo signal to the signal converter 4;

Step S4: The signal converter 4 converts the ultrasonic signal into a digital signal, and transmits the digital signal to the underwater host 3;

Step S5: The underwater host 3 transmits the digital signal to the underwater acoustic communication component 22;

The underwater acoustic communication underwater component 22 receives the digital signal, and sends the digital signal to the underwater acoustic communication underwater component 21 via wireless;

The underwater acoustic communication component 21 sends the digital signal to the ground host 1 .

Preferably, the signal converter 4 includes a Doppler signal converter 41 and a digital signal converter 42 connected by wire,

Step S4 comprises the following steps:

Step S41: the Doppler signal converter 41 converts the ultrasonic signal into a Doppler signal, and transmits the Doppler signal to the digital signal converter 42;

Step S42: The digital signal converter 42 converts the Doppler signal into a digital signal, and transmits the digital signal to the underwater host 3 .

Preferably, the underwater host 3 and the ultrasonic device 5 are connected by wire, and the frequency at which the ultrasonic receiving probe receives ultrasonic waves is controlled by the underwater host 3; when the underwater host 3 is in a wake-up state, the underwater host 3 has a low sampling rate mode There are two working modes: low sampling rate mode and high sampling rate mode, and the low sampling rate mode and high sampling rate mode are switched as the depth of the drill bit penetrates into the formation. Before drilling into a high-risk layer other than the reservoir, the underwater host 3 is adjusted In low sampling rate mode, the underwater host 3 controls the ultrasonic receiving probe to receive ultrasonic waves at a low frequency; The ultrasonic receiving probe receives ultrasonic waves at high frequency.

Although the present invention has been described in detail with general descriptions and specific examples above, it is obvious to those skilled in the art that some modifications or improvements can be made on the basis of the present invention. Therefore, the modifications or improvements made on the basis of not departing from the spirit of the present invention all belong to the protection scope of the present invention.

Claims (7)

1. A riser gas invasion monitoring device is characterized by comprising a ground host (1), a data acquisition and transmission system and a power supply system,

the data acquisition and transmission system comprises an underwater acoustic communication device (2), an underwater host (3), a signal converter (4) and an ultrasonic device (5),

the underwater acoustic communication device (2) comprises an underwater acoustic communication water part (21) and an underwater acoustic communication underwater part (22), and the underwater acoustic communication water part (21) is in wireless connection with the underwater acoustic communication underwater part (22);

the ground host (1) and the underwater acoustic communication waterborne part (21) are arranged above the water surface, and the underwater acoustic communication waterborne part (21) is connected with the ground host (1) through a wire;

the underwater acoustic communication component (22), the underwater host (3), the signal converter (4) and the ultrasonic device (5) are arranged underwater, and the ultrasonic device (5) is connected with the signal converter (4), the signal converter (4) is connected with the underwater host (3), and the underwater host (3) is connected with the underwater acoustic communication component (22) sequentially through wires;

the power supply system is connected with the data acquisition and transmission system through a lead;

arranging the data acquisition and transmission system, a power supply switch (6), a remote awakening device (7) and a battery pack (8) on the wall of the underwater part of a marine riser, connecting the battery pack (8) with the power supply switch (6) through leads, connecting the power supply switch (6) with the ultrasonic device (5) and the battery pack (8) with the underwater host (3) through leads, connecting a communication interface of the remote awakening device (7) with the underwater acoustic communication component (22) through a communication line, and connecting the remote awakening device (7) with the power supply switch (6) through a wire; the ultrasonic device (5) comprises an ultrasonic transmitting probe and an ultrasonic receiving probe, and the ultrasonic transmitting probe and the ultrasonic receiving probe are respectively arranged on the outer wall of the marine riser and are respectively positioned at two ends of the cross section of the marine riser; the ultrasonic transmitting probe is connected with the power supply switch (6) through a lead, and the ultrasonic receiving probe is connected with the signal converter (4) through a data line; wherein the underwater host (3) is in a dormant state;

the ground host (1) sends a power supply switch wake-up signal to the underwater acoustic communication water part (21),

the power supply switch wake-up signal is wirelessly sent to the underwater acoustic communication component (22),

the underwater acoustic communication component (22) transmits the power supply switch wake-up signal to the remote wake-up device (7);

the remote awakening device (7) receives the power supply switch awakening signal and immediately sends a power supply starting signal to the power supply switch (6);

the power supply switch (6) receives the power supply starting signal and closes the switch;

the ultrasonic device (5) and the underwater host (3) are electrified simultaneously, and the underwater host (3) is changed from a dormant state to a awakened state.

2. Riser gas cut monitoring device according to claim 1, wherein the power supply system comprises a power switch (6), a remote wake-up device (7) and a battery pack (8),

a power supply is arranged in the remote awakening device (7), the battery pack (8) is connected with the power supply switch (6) through a lead, and the power supply switch (6) is connected with the ultrasonic device (5) and the battery pack (8) is connected with the underwater host (3) through leads;

the underwater sound communication remote awakening device is characterized in that a communication interface is arranged in the remote awakening device (7), the communication interface of the remote awakening device (7) is connected with the underwater acoustic communication component (22) through a communication line, and the remote awakening device (7) is connected with the power supply switch (6) through a wire.

3. The riser gas migration monitoring device of claim 1,

the ultrasonic device (5) comprises an ultrasonic transmitting probe and an ultrasonic receiving probe, and the ultrasonic transmitting probe and the ultrasonic receiving probe are respectively arranged on the outer wall of the marine riser and are respectively positioned at two ends of the cross section of the marine riser;

the ultrasonic transmitting probe is connected with the power supply switch (6) through a lead, and the ultrasonic receiving probe is connected with the signal converter (4) through a data line.

4. The riser gas migration monitoring device of claim 1,

the signal converter (4) comprises a Doppler signal converter (41) and a digital signal converter (42) which are connected through a wire, the Doppler signal converter (41) is connected with the ultrasonic device (5) through a wire, and the digital signal converter (42) is connected with the underwater host (3) through a wire.

5. A riser gas cut monitoring method using a riser gas cut monitoring device according to any one of claims 1 to 4, the riser gas cut monitoring method comprising the steps of:

step S1: after the ultrasonic device (5) is electrified, the ultrasonic transmitting probe immediately transmits ultrasonic waves;

the ultrasonic receiving probe collects ultrasonic signals in the marine riser and sends ultrasonic echo signals to the signal converter (4);

step S2: the signal converter (4) converts the ultrasonic signal into a digital signal and transmits the digital signal to the underwater host (3);

and step S3: the underwater host (3) transmits the digital signal to the underwater acoustic communication part (22);

the underwater acoustic communication part (22) receives the digital signal and wirelessly transmits the digital signal to the underwater acoustic communication part (21);

the underwater acoustic communication water part (21) sends the digital signal to the ground host (1).

6. Riser gas invasion monitoring method according to claim 5, characterised in that said signal converter (4) comprises a Doppler signal converter (41) and a digital signal converter (42), and said Doppler signal converter (41) and said digital signal converter (42) are connected by wire;

the step S2 includes the steps of:

step S21: the Doppler signal converter (41) converts the ultrasonic signal into a Doppler signal and transmits the Doppler signal to the digital signal converter (42);

step S22: the digital signal converter (42) converts the Doppler signals into digital signals and transmits the digital signals to the underwater host (3).

7. The riser gas invasion monitoring method according to claim 5, wherein said underwater host (3) is connected with said ultrasonic device (5) by wire, and the frequency of said ultrasonic receiving probe receiving ultrasonic wave is controlled by said underwater host (3);

when the underwater host (3) is in the awakened state, the underwater host (3) has two working modes of a low sampling rate mode and a high sampling rate mode, and the low sampling rate mode and the high sampling rate mode are switched along with the depth change of the drill bit penetrating into the stratum,

before drilling into a high-risk layer other than a reservoir layer, the underwater host (3) is adjusted to be in a low sampling rate mode, and the underwater host (3) controls the ultrasonic receiving probe to receive ultrasonic waves at a low frequency;

when the high-risk layer and the reservoir layer which are not the reservoir layer are drilled, the underwater host (3) is adjusted to be in a high sampling rate mode, and the underwater host (3) controls the ultrasonic receiving probe to receive ultrasonic waves at high frequency.

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