CN-116792076-B - Device and method for dynamically measuring scale formation amount of shaft

CN116792076BCN 116792076 BCN116792076 BCN 116792076BCN-116792076-B

Abstract

The invention provides a shaft scaling quantity dynamic measurement device and method, wherein the shaft scaling quantity dynamic measurement device comprises a reaction kettle system, a rotary scaling system, a sample preparation system and a measurement system, wherein the reaction kettle system is divided into a top cover, a kettle body and a bottom cover, through holes are formed in the top cover and the bottom cover and are connected with other parts, the rotary scaling system comprises a motor and a hollow deposition rod, the hollow deposition rod is fixed on the top cover through a strong magnetic metal block, the motor drives the hollow deposition rod to rotate, the sample preparation system comprises a high-pressure displacement pump and an intermediate container, the sample preparation system is connected with the reaction kettle system, experimental fluid is pumped into the reaction kettle body through the high-pressure displacement pump after the intermediate container is configured, and the measurement device is connected with the sample preparation system through a pipeline and is used for detecting the gas-liquid ratio of the experimental fluid. The invention has the advantages that the scale formation amount can be tested under different conditions, the electromagnetic principle is utilized to drive the rotary scale formation system, the tightness of the reaction kettle is ensured, and meanwhile, the dynamic experiment can be carried out.

Inventors

WANG CHUNPU
TANG HUAJIA
HU YANG
XIE YANG
CHEN JIE
SUN LI
XIN JUN
XIAO GAOMIAN
LIU JINKU
YU JIA
Yang Chichen

Assignees

中国石油天然气集团有限公司
中国石油集团川庆钻探工程有限公司

Dates

Publication Date: 20260508
Application Date: 20220317

Claims (11)

1. A dynamic measuring device for the scale formation of a shaft is characterized by comprising a reaction kettle system, a rotary scale formation system, a sample preparation system and a measuring system, wherein, The reaction kettle system comprises a first valve, a reaction kettle, a temperature control box and a back pressure control and filtering unit, wherein the reaction kettle comprises a top cover, a bottom cover and a kettle body, the kettle body is a hollow cylinder body which is vertically arranged, the top cover and the bottom cover are fixedly and hermetically connected with the upper end and the lower end of the kettle body, a first through hole and a second through hole which penetrate through the top cover and the bottom cover are respectively arranged on the top cover and the bottom cover, the first valve is connected with the first through hole through a first pipeline so as to supply experimental fluid to the inside of the kettle body, the back pressure control and filtering unit is connected with the second through hole through a second pipeline so as to control the back pressure of the reaction kettle and collect inorganic salt scale in the discharged experimental fluid, the reaction kettle is arranged in the temperature control box, and the temperature control box can control the temperature inside the reaction kettle; The back pressure control and filtering unit comprises a second valve, a high-pressure filter element, a back pressure controller and a liquid collecting bottle, wherein the liquid collecting bottle is connected with the second through hole through a second pipeline, the second valve is arranged between the back pressure controller and the second through hole, the high-pressure filter element is arranged between the second valve and the liquid collecting bottle, and the back pressure controller is arranged between the high-pressure filter element and the liquid collecting bottle; The rotary scaling system comprises a motor, a support frame, a first strong magnetic metal block, a second strong magnetic metal block, a metal sealing bearing and a hollow deposition rod, wherein the motor is fixedly arranged at the upper end of a top cover by the support frame, an output shaft of the motor is vertically downward, the first strong magnetic metal block is fixedly arranged on the output shaft of the motor, the metal sealing bearing, the second strong magnetic metal block and the hollow deposition rod are all arranged in a kettle body, the second strong magnetic metal block is rotatably connected with the lower end of the top cover through the metal sealing bearing, and the upper end of the hollow deposition rod is fixedly connected with the lower end of the second strong magnetic metal block; the sample preparation system is connected with the reaction kettle system and can supply experimental fluid with preset pressure, flow and gas-liquid ratio into the reaction kettle; the sample preparation system comprises a first sample preparation unit and a second sample preparation unit, wherein a first intermediate container is arranged in the first sample preparation unit, and oil or gas is stored in the first intermediate container; the measuring system is connected with the sample preparation system to measure the gas-liquid ratio of the experimental fluid.
2. The device for dynamically determining the scale formation amount of a shaft according to claim 1, wherein the top cover and the bottom cover are fixedly and hermetically connected with the kettle body through threads, and loading and unloading holes are further formed in the top cover and the bottom cover for convenient disassembly and assembly.
3. The wellbore scaling quantity dynamic measurement device according to claim 1, wherein the sample preparation system further comprises a gas-liquid mixing pipeline and a third valve, the first sample preparation unit and the second sample preparation unit are respectively connected with one end of the gas-liquid mixing pipeline, the other end of the gas-liquid mixing pipeline is communicated with the first pipeline, and the third valve is arranged on the gas-liquid mixing pipeline.
4. The wellbore scaling quantity dynamic measurement device according to claim 1, wherein the first sample preparation unit further comprises a first high-pressure displacement pump, a first pressure gauge, a fourth valve and a fifth valve, wherein a third through hole and a fourth through hole are respectively formed in the top and the bottom of the first intermediate container, the first high-pressure displacement pump is communicated with the fourth through hole through a third pipeline, the fourth valve is arranged on the third pipeline, the first pressure gauge is arranged on the third pipeline and is positioned between the first high-pressure displacement pump and the fourth valve, the third through hole is connected with a gas-liquid mixing pipeline through a fourth pipeline, and the fifth valve is arranged on the fourth pipeline; The second sample preparation unit further comprises a second high-pressure displacement pump, a second pressure gauge, a sixth valve and a seventh valve, wherein a fifth through hole and a sixth through hole are respectively formed in the top and the bottom of the second intermediate container, the second high-pressure displacement pump is communicated with the fifth through hole through a fifth pipeline, the sixth valve is arranged on the fifth pipeline, the second pressure gauge is arranged on the fifth pipeline and located between the second high-pressure displacement pump and the sixth valve, the sixth through hole is connected with a gas-liquid mixing pipeline through a sixth pipeline, and the seventh valve is arranged on the sixth pipeline.
5. The wellbore scaling quantity dynamic measurement device according to claim 1, wherein grooves are formed in the top and the bottom of the top cover, and the first ferromagnetic metal block and the second ferromagnetic metal block are located inside the grooves.
6. The wellbore scale formation dynamic measurement apparatus according to claim 3, wherein the measurement system comprises a seventh pipeline, an eighth valve, an eighth pipeline, a gas meter, an analysis level and a capped liquid collection bottle, wherein the capped liquid collection bottle is arranged on an analytical balance, one end of the seventh pipeline is connected with the gas-liquid mixing pipeline, the other end of the seventh pipeline extends into the capped liquid collection bottle, the eighth valve is arranged on the seventh pipeline, and the gas meter is connected with the capped liquid collection bottle through the eighth pipeline so as to meter gas in experimental fluid.
7. A method for dynamically measuring the scale of a well bore, wherein the measuring method is realized by the device for dynamically measuring the scale of a well bore according to any one of claims 1 to 6, and the measuring method comprises the steps of: Starting a sample preparation system to prepare experimental fluid for an experimental sample to be tested according to the actual field gas-water ratio, pressurizing to an experimental set pressure value and maintaining; Vacuumizing the reaction kettle, pumping experimental fluid into the reaction kettle, and stopping pumping the experimental fluid when the pressure in the reaction kettle reaches an experimental set value; opening a back pressure controller to load back pressure into the reaction kettle so that the back pressure is equal to the experimental set pressure, and opening a temperature control box so that the temperature in the reaction kettle is equal to the experimental set temperature and is constant; starting a rotary scaling system to enable the hollow deposition rod to rotate according to the experimental set rotating speed, so that inorganic salt scale in experimental fluid in the reaction kettle is fully deposited on the hollow deposition rod; Closing the rotary scaling system and the temperature control box, and reducing back pressure to enable all experimental fluid in the reaction kettle to enter the liquid collecting bottle; Taking out the hollow sedimentation rod and the high-pressure filter element, weighing after drying, and calculating the scaling amount of the experimental fluid; The scale amount is calculated by formula 1, formula 1 being: Wherein W s is the scale formation amount, mg/L, m 1 is the initial mass of the hollow deposition rod, mg, m 2 is the initial mass of the high-pressure filter element, m 3 is the mass of the hollow deposition rod after the experiment, m 4 is the mass of the high-pressure filter element after the experiment, mg, and V is the volume of the reaction kettle and L.
8. The method of claim 7, further comprising detecting whether the gas-water ratio of the test fluid configured by the sample preparation system is acceptable by using a detection system, and if so, continuing the test, and if not, preparing again.
9. The method of claim 7, further comprising cleaning the reactor, changing experimental conditions, repeating the experiment, measuring the amount of scale under different experimental conditions, and plotting the change in the amount of scale under different experimental conditions, wherein the changing experimental conditions comprises changing at least one of experimental temperature, experimental test pressure, rotational speed of the motor, roughness of the hollow deposition rod, and experimental fluid gas-water ratio.
10. The method of claim 7, further comprising fitting the experimental data to obtain an empirical formula for the amount of well bore fouling that considers temperature, pressure, fluid flow rate, surface roughness, and gas-water ratio factors.
11. The method for dynamically determining the scale formation of a shaft according to claim 7, wherein the experimental set temperature is room temperature to 200 ℃, the experimental set pressure is 0.1 to 100mpa, and the gas-water ratio of the experimental fluid is 1000 to 2000m 3 /m 3 .

Description

Device and method for dynamically measuring scale formation amount of shaft Technical Field The invention relates to the field of oil and gas exploitation, in particular to a device and a method for dynamically measuring the scale formation amount of a shaft. Background For the existing scale formation amount measuring device and method, four experimental devices are provided, wherein the four experimental devices mainly comprise a normal pressure simple device, and the normal pressure simple device is used for placing experimental materials such as a metal hanging sheet, a stainless steel metal ball, a quartz sheet and the like into a beaker filled with stratum water under the condition of normal temperature and normal pressure, and calculating the scale formation amount and the scale formation speed by a weighing method. The second fluid phase analysis device can calculate the scale formation amount by the linkage of the device and an ion chromatograph on the premise of knowing the concentration of each ion in the formation water and by utilizing the concentration difference of the scale forming ions in ion test results at different temperatures and pressures for a plurality of times before and after. The three-tubule type dynamic scaling device is a tubule type dynamic scaling device, and the scaling thickness can be obtained by calculating the pipe diameter thickness by utilizing the pressure difference before and after the tubule according to a pipeline pressure drop formula. The thin tube type dynamic scaling device can only obtain the scaling thickness, the scaling quantity can not be obtained, the scaling thickness is the assumed average uniform thickness, the real situation of the scaling thickness can not be reflected, and the dynamic experimental device of the scaling influence caused by flow is a dynamic experimental device of the scaling influence caused by flow, wherein the scaling quantity is measured through the linkage of image recognition software and a turbidity probe. The dynamic experimental device for the influence of flow on scaling can only be carried out under normal pressure, and the accuracy degree of scaling quantity depends on the accuracy of an image software algorithm and has a certain error. In summary, the existing scale measuring device has similar principles, but considers a single scale factor. Chinese patent application with publication number CN108843314a, entitled "experimental apparatus and method for evaluating risk of scaling in water and gas producing well bore" discloses a method for calculating the amount of scaling in water and gas well bore. The experimental device in the patent is divided into a shaft simulation heat preservation system and an experimental fluid injection and collection system. The metal pipe simulating the shaft in the shaft simulating heat insulating system consists of a plurality of metal pipe pup joints, and when the scaling amount is calculated, the scaling amounts of the metal pipe pup joints are calculated and integrated respectively, so that errors are easy to generate. Disclosure of Invention The present invention aims to address at least one of the above-mentioned deficiencies of the prior art. For example, it is an object of the present invention to provide a device and method for dynamically determining the amount of wellbore fouling that is capable of modeling formation temperature, pressure, and true wellbore flow. In order to achieve the above object, according to an aspect of the present invention, there is provided a wellbore scaling amount dynamic measurement device, including a reaction kettle system, a rotary scaling system, a sample preparation system, and a measurement system, where the reaction kettle system includes a first valve, a reaction kettle, a temperature control box, and a back pressure control and filtration unit, where the reaction kettle includes a top cover, a bottom cover, and a kettle body, the kettle body is a hollow cylinder body in vertical arrangement, the top cover and the bottom cover are fixedly connected with the upper and lower ends of the kettle body in a sealing manner, the top cover and the bottom cover are respectively provided with a first through hole and a second through hole penetrating through, the first valve is connected with the first through hole through a first pipeline to supply an experimental fluid to the inside of the kettle body, the back pressure control and filtration unit is connected with the second through a second pipeline to control the back pressure of the reaction kettle and collect inorganic salt scale in the discharged experimental fluid, the reaction kettle is disposed in the temperature control box, and the temperature control box is capable of controlling the temperature inside the reaction kettle; The rotary scaling system comprises a motor, a support frame, a first strong magnetic metal block, a second strong magnetic metal block, a metal sealing bearing and a h