阅读说明：本技术 高压高气油比油井电磁加热节流方法及装置 (High-pressure high gas-oil ratio oil well electromagnetic heating throttling method and device ) 是由 戚亚明 黄强 詹有辉 夏新宇 蒋旭 罗国勤 王龙 田啊林 张斌 胡筱波 燕纪星 于 2020-07-06 设计创作，主要内容包括：本发明涉及油井采出液井口加热节流技术领域,是一种高压高气油比油井电磁加热节流方法及装置,前者按照下述方法进行：高压油井采出液出采油树通过引接管进入加热段后,由加热段的电磁加热节流装置先对对高压油井采出液进行加热；加热后的高压油井采出液进入节流油嘴,经电磁加热节流装置再进行节流降压至油田集输管网所需的压力后,送入油田集输管网。本发明工艺简单,操作便利,通过电磁加热段和高压节流段采用加热后再节流的方法,可有效增加采出液与电磁加热段的换热时间,提高装置的加热效率,降低油田开发过程中能量的消耗,提高油田开发效益。(The invention relates to the technical field of oil well produced liquid wellhead heating throttling, in particular to an electromagnetic heating throttling method and device for a high-pressure high-gas-oil ratio oil well, wherein the electromagnetic heating throttling method is carried out according to the following steps: after the high-pressure oil well produced liquid is discharged from the Christmas tree and enters the heating section through the lead pipe, the high-pressure oil well produced liquid is heated by the electromagnetic heating throttling device of the heating section; the heated high-pressure oil well produced liquid enters a throttling oil nozzle, is throttled and depressurized by an electromagnetic heating throttling device to reach the pressure required by an oil field gathering and transportation pipe network, and then is sent to the oil field gathering and transportation pipe network. The invention has simple process and convenient operation, adopts a method of heating and then throttling through the electromagnetic heating section and the high-pressure throttling section, can effectively increase the heat exchange time of the produced liquid and the electromagnetic heating section, improves the heating efficiency of the device, reduces the energy consumption in the oil field development process and improves the oil field development benefit.)

1. An electromagnetic heating throttling method for a high-pressure high-gas-oil-ratio oil well is characterized by comprising the following steps of: firstly, after the produced liquid of the high-pressure oil well flows out of the Christmas tree and enters the electromagnetic heating throttling device through the guide connection pipe, the produced liquid of the high-pressure oil well is heated by an electromagnetic heating section of the electromagnetic heating throttling device; and secondly, the heated high-pressure oil well produced liquid enters a high-pressure throttling section of the electromagnetic heating throttling device, is throttled and depressurized to the pressure required by an oil field gathering and transportation pipe network, and is sent to the oil field gathering and transportation pipe network.

2. The method of claim 1, wherein the pressure of the high pressure oil well production fluid is from 5MPa to 50 MPa.

3. The high pressure high gas oil ratio oil well electromagnetic heating throttling method of claim 1 or 2, characterized in that the electromagnetic heating section heats the high pressure oil well produced fluid to a temperature of 30 ℃ to 35 ℃.

4. The method of claim 1, 2 or 3 for throttling the oil well by electromagnetic heating, wherein the pressure required by the oil field gathering and transportation pipe network is 0.3MPa to 2.5 MPa.

5. An apparatus for implementing the high pressure high gas-oil ratio oil well electromagnetic heating throttling method according to any one of claims 1 to 4, characterized in that the apparatus comprises a Christmas tree, an electromagnetic heating throttling device, a pipe wall temperature sensing element, an in-situ thermometer, a temperature transmitter, an in-situ pressure gauge, a pressure transmitter and a control unit, wherein a plug is fixedly arranged at the left port of the small four-way at the upper part of the Christmas tree, a conversion joint is fixedly arranged at the right port of the small four-way at the upper part of the Christmas tree, a connection pipe is fixedly arranged between the outlet of the conversion joint and the inlet of the electromagnetic heating throttling device, a first oil outlet pipe is fixedly communicated with the liquid outlet of the electromagnetic heating throttling device 2, a second oil outlet pipe is fixedly communicated between the right port of the large four-way at the lower part of the Christmas tree 1 and the first oil outlet pipe, a second pressure detection pipeline is fixedly communicated with the second oil outlet pipe, the device comprises a control unit, a temperature detection throttling device, an electromagnetic heating throttling device, a pipe wall temperature sensing element, a local thermometer, a temperature transmitter, a local pressure gauge and a pressure transmitter, wherein the control unit is connected with the control unit through a control end.

6. The device of claim 5, wherein the electromagnetic heating throttling device comprises an electromagnetic heating controller, an electromagnetic heating section and a high-pressure throttling section, the electromagnetic heating section is fixedly communicated with the high-pressure throttling section, a heat insulating layer is arranged on the outer side of the pipe wall of the electromagnetic heating section, the heat insulating layer comprises an inner heat insulating layer, a heating layer, an outer heat insulating layer and an outer protective layer, the outer side of the pipe wall of the electromagnetic heating section is fixedly arranged with the inner side of the inner heat insulating layer, a pipe wall temperature sensing element is arranged between the outer side of the pipe wall of the electromagnetic heating section and the inner side of the inner heat insulating layer, the outer side of the inner heat insulating layer is fixedly arranged with the inner side of the heating layer, the outer side of the heating layer is fixedly arranged with the inner side of the outer heat insulating layer, the outer side of the outer heat insulating layer is fixedly arranged with the inner, the outlet on the right side of the high-pressure throttling section is fixedly provided with a plug, and the electromagnetic heating controller is electrically connected with the heating layer.

7. The device of claim 6, wherein the heating layer is a wound coil capable of heating the wall of the electromagnetic heating throttle device, and the wound coil is electrically connected with the electromagnetic heating controller.

8. The apparatus according to claim 5 or 6 or 7, wherein a high-sealing sampling cut-off valve is fixedly installed on the first pressure detection line between the first oil outlet pipe and the pressure transmitter.

9. The apparatus of claim 5 or 6 or 7 wherein a steel ball valve is fixedly mounted on the first flow line between the temperature sensing line and the first flow line outlet.

10. The apparatus of claim 8 wherein a steel ball valve is fixedly mounted on the first flowline between the temperature sensing line and the first flowline outlet.

Technical Field

The invention relates to the technical field of oil well produced liquid wellhead heating throttling, in particular to an electromagnetic heating throttling method and device for a high-pressure high gas-oil ratio oil well.

Background

At present, in oil fields at home and abroad, a well field heating process is mostly adopted for the problem of high condensation point of produced liquid, namely, after the produced liquid of an oil well is decompressed by a choke throttling device arranged on an oil production tree, the low-pressure produced liquid enters a heating device arranged on the well field to be heated to a certain temperature so as to meet the requirement of gathering and transportation temperature. However, for an oil well with a large gas-oil ratio, the temperature is reduced after the wellhead choke is adopted, the problem of freezing and blocking of the choke frequently occurs, the normal production of the oil well is influenced, and huge hidden dangers are brought to the safe production of the oil field.

Meanwhile, along with the reduction of the pressure after throttling, the flow velocity of the produced liquid of the oil well is increased to dozens of times before throttling, the effective retention time of the produced liquid in a heating device is greatly shortened, the heating effect of the produced liquid is poor, and the requirement of gathering and transporting the oil field cannot be met.

Disclosure of Invention

The invention provides an electromagnetic heating throttling method and device for a high-pressure high gas-oil ratio oil well, overcomes the defects of the prior art, and can effectively solve the problems of well mouth throttling and freezing blockage under the condition of high gas-oil ratio and potential safety hazard caused by failure in meeting the gathering and transportation temperature requirement.

One of the technical schemes of the invention is realized by the following measures: an electromagnetic heating throttling method for a high-pressure high-gas-oil ratio oil well is carried out according to the following method: firstly, after the produced liquid of the high-pressure oil well flows out of the Christmas tree and enters the electromagnetic heating throttling device through the guide connection pipe, the produced liquid of the high-pressure oil well is heated by an electromagnetic heating section of the electromagnetic heating throttling device; and secondly, the heated high-pressure oil well produced liquid enters a high-pressure throttling section of the electromagnetic heating throttling device, is throttled and depressurized to the pressure required by an oil field gathering and transportation pipe network, and is sent to the oil field gathering and transportation pipe network.

The following is a further optimization or/and improvement of one of the above-mentioned technical solutions of the invention:

the pressure of the high-pressure oil well produced liquid is 5MPa to 50 MPa.

The electromagnetic heating section heats the high-pressure oil well produced liquid to a temperature of 30-35 ℃.

The pressure required by the oil field gathering and transportation pipe network is 0.3MPa to 2.5 MPa.

The second technical scheme of the invention is realized by the following measures: a device for implementing the electromagnetic heating throttling method of the oil well with high gas-oil ratio comprises a Christmas tree, an electromagnetic heating throttling device, a pipe wall temperature sensing element, an in-situ thermometer, a temperature transmitter, an in-situ pressure gauge, a pressure transmitter and a control unit, wherein a screw plug is fixedly arranged at the left port of a small four-way joint at the upper part of the Christmas tree, a conversion joint is fixedly arranged at the right port of the small four-way joint at the upper part of the Christmas tree, a guide connection pipe is fixedly arranged between the outlet of the conversion joint and the liquid inlet of the electromagnetic heating throttling device, a first oil outlet pipe is fixedly communicated with the liquid outlet of the electromagnetic heating throttling device 2, a second oil outlet pipe is fixedly communicated between the right port of a large four-way joint at the lower part of the Christmas tree 1 and the first oil outlet pipe, a second pressure detection pipeline is fixedly communicated with the second oil outlet pipe, the in-situ pressure gauge and the pressure transmitter are sequentially arranged on the second pressure detection, a temperature detection pipeline is fixedly communicated with a first oil outlet pipe between the second oil outlet pipe and the electromagnetic heating throttling device, a temperature transmitter and a local thermometer are sequentially arranged on the temperature detection pipeline, a first pressure detection pipeline is fixedly communicated with a first oil outlet pipe between the electromagnetic heating throttling device and the temperature detection pipeline, a local pressure gauge and a pressure transmitter are sequentially arranged on the first pressure detection pipeline, a pipe wall temperature sensing element is fixedly arranged in the electromagnetic heating throttling device, and signal output ends of the pipe wall temperature sensing element, the local thermometer, the temperature transmitter, the local pressure gauge and the pressure transmitter are electrically connected with a control end of a control unit.

The following is further optimization or/and improvement of the second technical scheme of the invention:

the electromagnetic heating throttling device comprises an electromagnetic heating controller, an electromagnetic heating section and a high-pressure throttling section, wherein the electromagnetic heating section is fixedly communicated with the high-pressure throttling section, a heat insulation layer is arranged on the outer side of the pipe wall of the electromagnetic heating section, the heat insulation layer comprises an inner heat insulation layer, a heating layer, an outer heat insulation layer and an outer protection layer, the outer side of the pipe wall of the electromagnetic heating section is fixedly installed with the inner side of the inner heat insulation layer, a pipe wall temperature sensing element is arranged between the outer side of the pipe wall of the electromagnetic heating section and the inner side of the inner heat insulation layer, the outer side of the inner heat insulation layer is fixedly installed with the inner side of the heating layer, the outer side of the heating layer is fixedly installed with the inner side of the outer heat insulation layer, a throttling oil nozzle is arranged on the high-pressure throttling section, a liquid outlet is arranged on the outer, the electromagnetic heating controller is electrically connected with the heating layer.

The heating layer adopts a winding coil which can heat the pipe wall of the electromagnetic heating throttling device, and the winding coil is electrically connected with the electromagnetic heating controller.

A steel ball valve is fixedly arranged on the first oil outlet pipe between the temperature detection pipeline and the outlet of the first oil outlet pipe.

And a high-sealing sampling stop valve is fixedly mounted on the second oil outlet pipe between the second pressure detection pipeline and the outlet of the first oil outlet pipe.

The invention has simple process and convenient operation, adopts a method of heating and then throttling through the electromagnetic heating section and the high-pressure throttling section, can effectively increase the heat exchange time of the produced liquid and the electromagnetic heating section, improves the heating effect of the device, effectively solves the problem of wellhead throttling and freezing blockage under the condition of high gas-oil ratio, solves the hidden trouble of influencing the safety production of an oil field, and ensures the requirement of the collecting and conveying temperature of the produced liquid of the oil well.

Drawings

FIG. 1 is a schematic process flow diagram of example 5 of the present invention.

Fig. 2 is a front sectional enlarged structural schematic view of the electromagnetic heating throttling device 2 in fig. 1.

The codes in the figures are respectively: the device comprises a Christmas tree 1, an electromagnetic heating throttling device 2, an in-situ thermometer 3, a temperature transmitter 4, an in-situ pressure gauge 5, a pressure transmitter 6, a second pressure detection pipeline 7, a crossover joint 8, a leading pipe 9, a first oil outlet pipe 10, a temperature detection pipeline 11, a first pressure detection pipeline 12, a steel ball valve 13, a high-seal sampling stop valve 14, an inner heat insulation layer 15, an inner heat insulation layer 16, an outer heat insulation layer 17, an outer protection layer 18, a throttling oil nozzle 19, a liquid outlet 20, a plug 21, a pipe wall temperature sensing element 22 and a second oil outlet pipe 23.

Detailed Description

The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention. The various chemical reagents and chemicals mentioned in the present invention are all well known and commonly used in the art, unless otherwise specified.

The invention is further described below with reference to the following examples: