CN102798499A - Multi-tube type minimum mixed-phase pressure measuring method and device - Google Patents
Multi-tube type minimum mixed-phase pressure measuring method and device Download PDFInfo
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- CN102798499A CN102798499A CN2012102897991A CN201210289799A CN102798499A CN 102798499 A CN102798499 A CN 102798499A CN 2012102897991 A CN2012102897991 A CN 2012102897991A CN 201210289799 A CN201210289799 A CN 201210289799A CN 102798499 A CN102798499 A CN 102798499A
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Abstract
The invention relates to a multi-tube type minimum mixed-phase pressure measuring method and device. The multi-tube type minimum mixed-phase pressure measuring device comprises multiple slim pipes connected in parallel, wherein each slim pipe is internally filled with quartz sands for simulating loose sandstone in a stratum; two ends of each slim tube are respectively connected with a fluid inlet and a fluid outlet; an injection pump is connected with the fluid inlet through a middle container; the fluid outlet is connected with a back-pressure valve; an inlet-end reciprocation pump is connected between the fluid inlet and the middle container; an outlet-end reciprocation pump is connected between the fluid outlet and the back-pressure valve; and two ends of each slim tube are provided with interface control valves capable of connecting or disconnecting each slim tube with both the fluid inlet and the fluid outlet. The multi-tube type minimum mixed-phase pressure measuring method, disclosed by the invention, enables gas and crude oil to flow in a reciprocation manner for multiple times in each slim tube by depending on a displacement force, so that the gas and the liquid can be mixed fully. Each slim tube can finish the test of one pressure point, and the measuring data of multiple pressure points can be obtained sequentially through multiple slim tubes, so that the accuracy of the data measurement is improved; and convenience for operation and short test period are obtained.
Description
Technical field
The present invention relates to a kind of method and device that is used to measure minimum miscible pressure, minimum miscible pressure measuring method of especially a kind of multitube and device belong to oil physical property measuring technique.
Background technology
Minimum miscible pressure (MMP) is a most basic oil physical-property parameter in the gas drive development plan design of oil field.Big quantity research confirms, the raising oil recovery that the gas drive the mixed phase state under exploitation can be by a relatively large margin, thereby laboratory study confirms that the minimum miscible pressure under the reservoir condition is very important.
The method of the minimum miscible pressure of present known measurement mainly contains tubule experimental method and interfacial tension method, and wherein the tubule experiment is the measuring method that generally adopts in the practical applications design.Wherein, known tubule measurement mechanism 1 is as shown in Figure 1, and experimental implementation is main with displacement; Promptly through injection pump 12; Displacement gas pump in the intermediate receptacle 11 is got into tubule 10 inlets, crude oil in the tubule 10 is come out through check valve 14 displacements by outlet, collect by graduated cylinder 13.Intermediate receptacle 11, the tubule 10 of this known configurations all are arranged in the constant temperature oven.The effect of tubule 10 is in 20 meters length, and gas composition relies on displacement power and diffusivity fully to mix with oil component, and under the condition greater than minimum miscible pressure, gas and crude oil can be mixed into single-phase (being mixed phase).There is certain pore texture between the loose sand grains in the tubule 10, mixed process is exerted an influence, really process such as simulating oil deposit inner fluid seepage flow and component exchange.
Known tubule device is 6 millimeters of 20 meters long, diameter, and the steel tube of inner back-up sand is with the pore texture of simulation understressed sand.Displacing medium is made approximate piston type one dimension and is advanced, and can simulate the process of gaseous component and oil phase component mass transfer.The standard that its evaluation gas phase and oil phase reach the mixed phase state is the pressure that oil recovery reached 90% o'clock, and a large amount of at home oil fields of this standard draw on the sample actual measurement basis.Tubule is inconsistent along the mixability of gas phase in the journey and oil phase under this state in theory; Even part mixed phase not; But not only be fit to very much practical applications with recovery ratio 90% as a criterion, and unified foundation be provided for the research evaluation of different experiments chamber.
The key step that the tubule experimental method is measured minimum miscible pressure is under the reservoir temperature environment, the recovery ratio when testing 6 different pressures respectively with certain gap, and common recovery ratio should be no less than 2 spot pressures greater than 90% spot pressure.After the test, according to 6 point data match recovery ratio and pressure dependence curve, then the corresponding pressure in knee point place is the minimum miscible pressure of oil sample under this reservoir temperature.
The advantage of tubule experimental method is that measured value is fit to practical applications very much, and the personnel that have been studied widely approve.Experimental principle is simple, determination methods is clear.But also there are following 3 shortcomings in this method:
1. characteristics such as tubule has that diameter is little, distance and back-up sand are loose, these factors produce at displacement process easily also that latch up phenomenon, particularly viscosity are high, heavy constituent (colloid, the pitch) crude oil that content is high simultaneously.
The tubule experiment measuring cycle long, every group of experiment takes cycle of the 1-2 month.Experimental procedure comprises: saturated oil, displacement and cleaning tubule (using toluene, methyl alcohol, sherwood oil and nitrogen purge respectively).
3. under the high-temperature and high-pressure conditions, when corrosive gas is adopted in experiment, pipeline burn into seepage phenomenon often taking place in longer cycle, causes prolong experimental period.
Because the defective that above-mentioned known technology exists; The inventor is according to the production design experiences of being engaged in this area and association area for many years; Develop minimum miscible pressure measuring method of multitube of the present invention and device; Shortening test period, and improve the measuring speed and the precision of minimum miscible pressure effectively.
Summary of the invention
The purpose of this invention is to provide a kind of method of utilizing many short tubes to carry out minimum miscible pressure measurement.
Another object of the present invention provides the minimum miscible pressure measurement mechanism of a kind of multitube.
For this reason, the present invention proposes the minimum miscible pressure measuring method of a kind of multitube, comprising:
A, tubule are filled and presented, in every tubule, insert can simulated formation in the silica sand of understressed sand, with the tubule two ends add filtering plug, pressure cap is fastening;
B, every tubule is carried out the saturated oil operation;
The inlet end of C, said tubule is connected with a reciprocating pump respectively with endpiece;
D, selection be a tubule wherein; Carry out the gas drive experiment under first pressure condition; Gas and crude oil are back and forth flowed at least one time in single tubule,, make two to reach sufficient mixing mutually by said tubule inner pore effect on structure; And obtain the fluid that this root tubule is discharged under first pressure condition, draw the recovery ratio of this root tubule under first pressure condition;
E, the other tubule of selection, repetition above-mentioned steps D obtains the recovery ratio under the different pressures condition successively under another pressure condition;
F, utilize the measured data of respectively organizing, match pressure and recovery ratio relation curve obtain minimum miscible pressure value according to knee point.
The present invention also proposes the minimum miscible pressure measurement mechanism of a kind of multitube, and it comprises:
Many tubules are connected in parallel, and are filled with the silica sand of understressed sand in the simulated formation in every said tubule, and the two ends of said tubule are connected with fluid egress point with fluid intake respectively;
One injection pump is connected with said fluid intake through an intermediate receptacle, and said fluid egress point is connected with pressing valve together; Wherein, be connected with an inlet end reciprocating pump between said fluid intake and the intermediate receptacle, be connected with the endpiece reciprocating pump between said fluid egress point and the check valve;
The two ends of every said tubule are provided with can control the interface operation valve that it is communicated with or closes with fluid intake and fluid egress point.
Compare with known tubule experimental technique, the present invention has the following advantages:
1, minimum miscible pressure measuring method of multitube and device have kept the measuring principle of known experimental technique; Utilize the repeatedly to-and-fro movement in the hole in a tubule of fluid; Realized fully contacting of gas and liquid, promptly guaranteed the influence of pore texture the component mass transfer.Tubule length is reduced to 1-3 rice by 20 meters simultaneously, has effectively stopped because of viscosity of crude is high, the high latch up phenomenon that causes of heavy constituent content.
2, method of the present invention is short measuring period, and be 23 weeks every group of experimental period, and more known measuring method reduced about 3 weeks.Because shortened the length of tubule significantly, so the tubule cleaning process is more easy, the cost of multitube tubule measurement mechanism is 1/3 of a known configurations, if experimental duties are nervous, can remove the tubule cleaning process from, replaces new tubule and gets final product in addition.
3, because measuring period of the present invention is short, and the corrosive gas that experiment is adopted is very little to the pipeline corrosion influence, improved the success ratio of experiments of measuring.
4, measuring method of the present invention can qualitative description the complexity of the alternate mixed phase of different gas-liquids.Gas-liquid after the to-and-fro movement repeatedly, reaches even admixture in single tube, if carry out the component analysis of gas phase or liquid phase this moment, can the alternate component mass transfer degree of clear and definite gas-liquid, and promptly reflected the mixed phase degree.And known tubule method can't be accomplished this point, can only use minimum miscible pressure to describe.
The minimum miscible pressure measuring method of the multitube that the present invention proposes is acted on principle and the testing process of pore texture to the mixed process influence; Rely on displacement power to make gas and crude oil in single tubule; (its number of times that back and forth flows is confirmed according to requirement of experiment) repeatedly back and forth flows; By the influence of pore texture, make gas-liquid two-phase reach well-mixed purpose.Every tubule can be accomplished the test of a spot pressure; Can obtain the measurement data of a plurality of spot pressures successively through many tubules; Can also carry out correct operation or additional survey through one or more tubule of extra increase, improve the accuracy of measurement data.The present invention is easy to operate, and test period is short.
Description of drawings
Following accompanying drawing only is intended to the present invention is done schematic illustration and explanation, not delimit the scope of the invention.Wherein,
Fig. 1 is known minimum miscible pressure measurement mechanism structural representation;
Fig. 2 is the minimum miscible pressure measurement mechanism of a multitube of the present invention structural representation;
Fig. 3 is that the tubule assembly master of the minimum miscible pressure measurement mechanism of multitube of the present invention looks synoptic diagram;
Fig. 4 is the tubule assembly schematic side view of the minimum miscible pressure measurement mechanism of multitube of the present invention;
Fig. 5 is the end cap cross-sectional schematic of the minimum miscible pressure measurement mechanism of multitube of the present invention;
Fig. 6 is the diagrammatic cross-section along A-A line among Fig. 5.
The drawing reference numeral explanation:
1, known tubule measurement mechanism 10, tubule 11, intermediate receptacle
12, injection pump 13, graduated cylinder 14, check valve
2, measurement mechanism of the present invention 20, tubule 201,202, end cap
203, interface operation valve 204, fluid intake 205, fluid egress point
206, tubule interface 207, connection runner 208, sprue
209, path 21, intermediate receptacle 22, injection pump
23, measuring container 24, check valve 25, constant temperature oven
26, inlet end reciprocating pump 27, endpiece reciprocating pump 28, side contiguous block
29,30, interface tube block 31, main contiguous block 32, rapid-acting coupling
Embodiment
The present invention proposes the minimum miscible pressure measuring method of a kind of multitube, and it mainly comprises:
A, tubule are filled and presented, in every tubule, insert can simulated formation in the silica sand of understressed sand, with the tubule two ends add filtering plug, pressure cap is fastening;
B, every tubule is carried out the saturated oil operation;
The inlet end of C, said tubule is connected with a reciprocating pump respectively with endpiece;
D, selection be a tubule wherein; Carry out the gas drive experiment under first pressure condition; Gas and crude oil are back and forth flowed at least one time in single tubule,, make two to reach sufficient mixing mutually by said tubule inner pore effect on structure; And obtain the fluid that this root tubule is discharged under first pressure condition, draw the recovery ratio of this root tubule under first pressure condition;
E, the other tubule of selection, repetition above-mentioned steps D obtains the recovery ratio under the different pressures condition successively under another pressure condition;
F, utilize the measured data of respectively organizing, match pressure and recovery ratio relation curve obtain minimum miscible pressure value according to knee point.
Wherein, When every tubule is carried out the saturated oil operation; Mainly comprise: open the inlet end and the endpiece interface operation valve of each said tubule, in each said tubule, pump into crude oil with first pressure, and the check valve pressure that is connected with the endpiece of said tubule is set at first pressure; When displacement volume during greater than the twice of every tubule void volume sum, the interface operation valve that only keeps tubule two ends is opened the interface operation valve of closing all the other said tubule two ends; When continuing the single tubule volume of voids of one times of displacement, the interface operation valve of closing these root tubule two ends; The interface operation valve of opening another root tubule two ends repeats above-mentioned steps, and each root tubule is carried out displacement, accomplishes until seven whole saturated oil of tubule, and closes the interface operation valve of every tubule.
Further; In the gas drive experimentation: the valve of at first opening the inlet end reciprocating pump that gas intermediate receptacle valve is connected with said tubule inlet end; Through middle the appearance gas is pushed in the tubule device, the endpiece reciprocating pump that is connected with said tubule endpiece simultaneously moves back pump automatically under the first constant pressure state; When the gas volume in getting into said tubule is 1.5 times of tubule void volume, closes intermediate receptacle and stop air feed; Then, start the endpiece reciprocating pump, and the fluid in the said endpiece reciprocating pump is oppositely pushed in the said tubule, and said inlet end reciprocating pump then is set at the first constant pressure state and moves back pump automatically with constant speed; After the endpiece reciprocating pump is all released the pump inner fluid, be set to moving back pump automatically with the first constant pressure state, this moment, the inlet end reciprocating pump then was set at constant speed state and startup; Repeat once above-mentioned startup endpiece reciprocating pump, the inlet end reciprocating pump is set at and moves back pump automatically; Close the endpiece reciprocating pump, the endpiece of said tubule is communicated with the check valve that is connected said tubule endpiece, and collect the fluid that said tubule endpiece is discharged.
For realizing the measuring method of above-mentioned minimum miscible pressure; The present invention also proposes the minimum miscible pressure measurement mechanism of a kind of multitube; It comprises: many tubules are connected in parallel; Be filled with the silica sand of understressed sand in the simulated formation in every said tubule, the two ends of said tubule are connected with fluid egress point with fluid intake respectively; One injection pump is connected with said fluid intake through an intermediate receptacle, and said fluid egress point is connected with check valve; Wherein, be connected with an inlet end reciprocating pump between said fluid intake and the intermediate receptacle, be connected with the endpiece reciprocating pump between said fluid egress point and the check valve; The two ends of every said tubule are provided with can control the interface operation valve that it is communicated with or closes with liquid inlet and liquid outlet.
The present invention utilizes many tubules, and makes fluid to-and-fro movement in tubule, the mode that has replaced conventional tubule to test single long lines, once flow, and principle coincidence measurement of the present invention requirement, test process is significantly simplified.And gas-liquid is in every tubule after the to-and-fro movement repeatedly; Reach even admixture; If carry out the component analysis of gas phase or liquid phase this moment; Can the alternate component mass transfer degree of clear and definite gas-liquid, promptly not only can realize that through method of the present invention and device minimum miscible pressure describes, but also can describe the complexity of the alternate mixed phase of gas-liquid.
Understand in order technical characterictic of the present invention, purpose and effect to be had more clearly; Below in conjunction with accompanying drawing and preferred embodiment; To embodiment, structure, characteristic and the effect of minimum miscible pressure measuring method of multitube of the present invention and device, specify as after.In addition, through the explanation of embodiment, when can being to reach technological means and the effect that predetermined purpose takes to be able to go deep into more concrete understanding to the present invention, yet institute's accompanying drawing only provides reference and explanation usefulness, is not to be used for the present invention is limited.
As shown in Figure 2, measurement mechanism 2 of the present invention comprises: many tubules 20 are connected in parallel, and are filled with the silica sand of understressed sand in the simulated formation in every tubule 20, and sand grains particle diameter and ratio are identical with known tubule method.Tubule 20 two ends add the metal filtration plug, and this filtering plug can prevent that fine grained sand runs off.Tubule 20 two ends are fastening through cutting ferrule and pressure cap, and the filtering plug at tubule two ends is compressed, and tubule, sand grains, filtering plug and pressure cap are integrally formed.The enclosed construction at these tubule 20 two ends can adopt conventional structure, repeats no more at this.Two ends with tubule 20 are connected with fluid egress point 205 with fluid intake 204 respectively again; One injection pump 22 is connected with fluid intake 204 through an intermediate receptacle 21, and fluid egress point 205 is connected with check valve 24; Wherein, be connected with an inlet end reciprocating pump 26 between fluid intake 204 and the intermediate receptacle 21, be connected with endpiece reciprocating pump 27 between fluid egress point 205 and the check valve 24; The two ends of every tubule 20 are provided with can control the interface operation valve 203 that it is communicated with or closes with fluid intake 204 and fluid egress point 205.
Wherein, intermediate receptacle 21, inlet end reciprocating pump 26, endpiece reciprocating pump 27, tubule 20 all are arranged in the constant temperature oven 25.
Check valve 24 is connected with measuring container 23, and measuring container 23 also is connected with endpiece reciprocating pump 27, thereby can accept the fluid of discharging in the endpiece reciprocating pump 27.
In a preferred embodiment, the useful space in inlet end reciprocating pump 26 and the endpiece reciprocating pump 27 is greater than 1.5 times of every tubule void volume.And the length of every tubule is 1m 3m.
The present invention adopts the many tubules short than known technology, can accomplish the test process of different pressures point successively, has shortened measuring period greatly, and the tubule cleaning process is more easy, and has practiced thrift the tubule scavenging period.
Please cooperate referring to Fig. 3, Fig. 4; In a feasible technical scheme; The two ends of tubule 20 are connected with end cap 201,202 respectively; End cap 201,202 is provided with a plurality of tubule interfaces 206 that match and be connected with tubule 20; One of them end cap 201 is provided with the fluid intake 204 that is connected with injection pump 22, and another end cap 202 is provided with the fluid egress point 205 that is connected with check valve 24, and tubule interface 206 can be connected with fluid intake 204 or fluid egress point 205 through the path 209 that is arranged in the end cap.
Further; End cap 201,202 is provided with two row's tubule interfaces 206; Be connected through the connection runner 207 that is arranged in the end cap between a plurality of tubule interfaces 206 of every row; Be provided with fluid intake 204 between two row's tubule interfaces 206 of end cap 201; Be provided with fluid egress point 205 between two row's tubule interfaces 206 of end cap 202, fluid intake 204 or fluid egress point 205 are connected with each tubule interface 206 through sprue 208 and connection runner 207, and the connection runners 207 in the end cap 201,202 constitute I-shaped path 209 with sprues 208.Certainly; The position that is provided with of tubule interface 206, fluid intake 204, fluid egress point 205 is not limited thereto; Wherein, Fluid intake 204, fluid egress point 205 also can be arranged on the outside of two row's tubule interfaces, are communicated with fluid intake 204 and fluid egress point 205 or close just passable as long as can control every tubule 20 through interface operation valve 203.
In addition; The planform of end cap 201,202 with and the shape of interior path 209 do not limit; End cap 201,202 can form for being fastened by two halfbodies, covers the two parts that form said path 209 on the face at two, fastens the back and constitutes complete fluid passage.For the ease of processing; End cap 201,202 also possibly be spliced to form by a plurality of blocks, please cooperate referring to Fig. 4, Fig. 5, Fig. 6, in a specific embodiment; End cap 201,202 comprises two interface tube blocks, 29,30, one main contiguous block 31; Wherein, interface tube block 29,30 is provided with the more than one tubule interface 206 that can be connected with tubule 20, is connected by being communicated with runner 207 between each tubule interface 206; One side of the main contiguous block 31 of end cap 201 is provided with fluid intake 205, and a side of the main contiguous block 31 of end cap 202 is provided with fluid egress point 205, and fluid intake 204 or fluid egress point 205 are connected with the sprue 208 that connects said main contiguous block 31; The two ends of main contiguous block 31 are connected with interface tube block 29,30 respectively; The two ends of this sprue 208 are connected with the connection runner 207 of interface tube block 29,30 respectively; Constitute I-shaped path 209; And the two ends of main contiguous block 31 and with interface tube block 29,30 for being tightly connected, promptly be communicated with between runner 207 and the sprue 208 for being tightly connected, guarantee that flowing fluid can not leak in it.Wherein, in Fig. 5, Fig. 6, schematically shown the connection situation of end cap inner gateway 209.
In addition, the two ends of two rectangular tube interface body 29,30 are connected through bolt with a side contiguous block 28 respectively, the entire terminal cover 201,202 that constitute Stability Analysis of Structures, is connected firmly.
Specify the measuring method of the minimum miscible pressure of multitube below in conjunction with device of the present invention.
At first carry out filling and presenting of tubule 20, in every tubule 20, insert can simulated formation in the silica sand of understressed sand, with the tubule two ends add filtering plug, pressure cap is fastening; Then; With the two ends of every tubule 20 respectively with end cap 201 and end cap 202 on the tubule interface 206 that is provided be connected; Injection pump 22 is connected through the inlet of intermediate receptacle 21 with tubule 20, and the endpiece of tubule 20 is parallel with check valve 14, begins every tubule is carried out the saturated oil operation; After every tubule 20 whole saturated oil were accomplished, the interface operation valve 203 of closing all tubule two ends was connected with inlet end reciprocating pump 26 inlet end of tubule 20 respectively with endpiece with endpiece reciprocating pump 27, and disconnection check valve 14; Select wherein tubule 20; Carry out the gas drive experiment under first pressure condition; Gas and crude oil are back and forth flowed at least one time in single tubule,, make gas-liquid two-phase reach sufficient mixing by said tubule inner pore effect on structure; And obtain the fluid that this root tubule is discharged under first pressure condition, draw the recovery ratio of this root tubule under first pressure condition; Select an other tubule; Under another pressure condition, repeat above-mentioned gas drive experimental procedure; Recovery ratio when obtaining 6 different pressures like hope then need be carried out above-mentioned gas drive experiment respectively to 6 tubules under 6 pressure, obtain the recovery ratio under the different pressures condition successively; At last, utilize the measured data of respectively organizing, match pressure and recovery ratio relation curve obtain minimum miscible pressure value according to knee point, and this step is a known technology, repeats no more at this.
In a specific embodiment, above-mentioned saturated job step further comprises:
The inlet end of b1, each tubule 20 and endpiece interface operation valve 203 are all opened, and injection pump pumps into crude oil with first pressure P 1 in each tubule 20, and the check valve pressure that will be connected with the endpiece of tubule 20 is set at first pressure P 1;
B2, when displacement volume during greater than the twice of every tubule 20 void volume sums, the interface operation valve 203 that only keeps tubule two ends is opened the interface operation valve 203 of closing all the other tubule 20 two ends;
B3, when continuing the single tubule volume of voids of one times of displacement, the interface operation valve 203 of closing these root tubule 20 two ends;
B4, the interface operation valve 203 of opening another root tubule 20 two ends repeat above-mentioned steps b3, and each root tubule is carried out displacement one by one, accomplish until the every whole saturated oil of tubule, and close the interface operation valve 203 of every tubule 20.
Further, above-mentioned miscible pressure gas drive experiment comprises:
1) valve of unlatching gas intermediate receptacle 21 valves and the inlet end reciprocating pump 26 that is connected with tubule 20 inlet ends; Injection pump, intermediate receptacle 21, inlet end reciprocating pump 26, a selected tubule 20, endpiece reciprocating pump are connected; Hold 21 gas pushed in the tubule device through middle, the endpiece reciprocating pump 27 that is connected with tubule 20 endpiece simultaneously moves back pump automatically under the first constant pressure state;
When 2) gas volume in getting into this root tubule 20 is 1.5 times of this tubule void volume, closes intermediate receptacle 21 and stop air feed;
3) start endpiece reciprocating pump 27, and the fluids in the endpiece reciprocating pump 27 are oppositely pushed in this tubule 20, and 26 in inlet end reciprocating pump is set at the first constant pressure state and moves back pump automatically with constant speed;
4) after endpiece reciprocating pump 27 is all released the pump inner fluid, be set to moving back pump automatically with the first constant pressure state, 26 in inlet end reciprocating pump is set at constant speed state and starts at this moment;
5) after inlet end reciprocating pump 26 is all released the fluid in it, repeating step 3) once;
6) close endpiece reciprocating pump 27, the endpiece of this tubule 20 is communicated with the check valve that is connected the tubule endpiece 14, inlet end reciprocating pump 26 is set at constant speed state and starts, collect the fluid of discharging by this tubule.
Wherein, In above-mentioned steps 6); Close after the pump inner fluid all flows out when inlet end reciprocating pump 26, continue in this tubule 20, to inject the gas of 1.5 times of volume of voids, the fluid in this tubule 20 can fully be discharged; The fluid of its discharge also counts this tubule of collecting in the lump and discharges in the total amount of fluid, thereby the recovery ratio that can guarantee this measured root tubule is accurate.So far, the experiment of the gas drive under pressure P 1 state finishes.When the gas drive experiment was opened, four plungers of inlet end reciprocating pump 26 and endpiece reciprocating pump 27 all were in the top of pump, do not have fluid before the pump inner plunger.
In order to make measurement data accurately, reliably, in a preferred embodiment, the radical of tubule 20 is set to Duo at least one than the spot pressure of required measurement.Thereby,, can utilize the tubule of increase to mend survey if one of them spot pressure measurement result is produced when querying in measuring process.
Be measured as specific embodiment to adopt seven tubules to carry out minimum miscible pressure below, further specify principle of work of the present invention.
In the present embodiment, have seven tubules 20, adopt stainless steel to process, can select internal diameter 6mm, wall thickness imm, withstand voltage iOOMPa, 200 ℃ of heatproofs, the tubule 20 of joint length 1m.At every tubule 20 inner filling silica sands, sand grains particle diameter and ratio are identical with conventional tubule method.The two ends of tubule 20 add the metal filtration plug of external diameter 6mm, length 1Omm.The filtering plug permeability is greater than 10 darcies, and the end face aperture prevents that less than 10 microns fine grained sand runs off.Tubule two ends outer wall is fastening by internal diameter 8mm cutting ferrule and pressure cap, can not only be connected with the tubule interface on the end cap, and the cutting ferrule of impaction state also compresses the filtering plug at tubule two ends, and tubule, sand grains, filtering plug and pressure cap are integrally formed.Measure minimum miscible pressure with known tubule experimental method and compare, the tubule 20 that the present invention adopted has reduced the length of tubule greatly, in known method; The length of tubule is 20m; And tubule 20 of the present invention is generally 1m-3m, therefore, compares with known technology; The present invention has shortened measuring period greatly, has improved the measuring speed and the measuring accuracy of minimum miscible pressure.
Please cooperate referring to Fig. 5, in the present embodiment, tubule 20 adopts the connected mode of rapid-acting couplings 32, the two ends of every tubule 20 is connected with end cap 201,202, thereby has improved the built-up time of measurement mechanism, has further improved operating efficiency.
As shown in Figure 4; Through two end caps 201,202 seven tubules 20 are together in parallel, and end cap 201,202 links to each other with the injection pump that carries out displacement test 22, intermediate receptacle 21, inlet end reciprocating pump 26 and endpiece reciprocating pump 27, check valve 24, measuring container 23 etc. respectively.The present invention is respectively equipped with seven tubule interfaces 206 on end cap 201,202; As shown in the figure, in the present embodiment, end cap 201,202 integral body are that two interface tube blocks 29,30, side contiguous block 28 and the main contiguous block 31 of rectangle formed; An interface tube block 29 is provided with four tubule interfaces 206 therein; Another interface tube block 30 is provided with 206, two interface tube blocks 29 of three tubule interfaces, is connected by main contiguous block 31 between 30, and both sides are connected by side contiguous block 28.Interface tube block the 29, the 30th, the bearing object that is connected with tubule 20, and they have path 209 to be connected with 31 of main contiguous blocks, at end face up and down, the path 209 that is connected with main contiguous block 31 through the single tubule 20 of interface operation valve 203 controls.Contiguous block 28 fitted bolts in side use, and play effect fastening, that stablize whole multitube tubule device.
Graduated cylinder 13 among the present invention not only is connected with check valve 14, also is connected with endpiece reciprocating pump 27 simultaneously, the fluid of discharging in the time of can accepting 27 emptyings of endpiece reciprocating pump.In endpiece reciprocating pump 27, have to a certain degree residual because fluid mixes the back, when particularly changing oil sample, must guarantee that guaranteeing does not have other fluid in it with 27 emptyings of endpiece reciprocating pump.
Carry out the measurement of minimum miscible pressure, tubule 20 is filled and presented in the preparation that at first experimentizes, and according to the strata condition of required simulation, packs into after the silica sand that chooses mixed in the every tubule 20, adds filtering plug at tubule 20 two ends, and fastening with cutting ferrule, pressure cap.The oil gas sample is prepared, and prepares saturatedly to use gas with crude oil and displacement.Parameters such as experimental temperature, spot pressure P1～P6 to be tested (from low to high) and displacing velocity are confirmed in experimental design.
Be the saturated oil process then; Under the experimental temperature of confirming, according to the experimental standard saturated oil, every tubule 20 is connected in parallel with check valve 14 through the fluid egress point 205 of end cap 202; In this process, cut off inlet end reciprocating pump 26 and endpiece reciprocating pump 27 and being connected of installing.The back pressure of check valve is set to first force value (P1), and injection pump 12 pushes multitube tubule device with the crude oil in the intermediate receptacle 11, under pressure P 1 condition, carries out saturated with the 0.05mL/min flow velocity.Every tubule 20 two ends of saturated initial stage control are communicated with fluid intake 204, the fluid egress point 205 of end cap 201,202 or the interface operation valve 203 that breaks off is all opened; When the displacement volume greater than 7 tubules 20 in during 2 times of total pore size volume; The interface operation valve 203 that adjustment control tubule 20 is communicated with or breaks off with endpiece end cap 202; The interface operation valve 203 that only keeps a tubule 20 is opened, and closes being communicated with of all the other six roots of sensation tubules 20 and end cap 202 inner gateways 209; Close the interface operation valve 203 of this root tubule and end cap 202 links when continuing the single tubule volume of voids of one times of displacement; Select an other tubule, that is, open the interface operation valve 203 of another root tubule 20; This tubule is carried out one times of single tubule volume of voids of displacement; Repeat this step, after seven tubules, 20 whole saturated oil are accomplished, close total interface operation valve 203.Recovery inlet end reciprocating pump 26 and endpiece reciprocating pump 27 are communicated with apparatus of the present invention, break off check valve 14 paths.
Carry out the gas drive experiment, obtain the recovery ratio under each pressure condition.Select No. 1 tubule 20 to carry out the gas drive experiment under first pressure (P1) condition, that is, only No. 1 tubule is connected with the sprue of main contiguous block 31, and all the other interface operation valves 203 all are in closed condition.4 plungers of inlet end reciprocating pump 26 and endpiece reciprocating pump 27 all are in the top of pump, promptly do not have fluid in the pump.A. open the valve of gas intermediate receptacle 11 and the valve of inlet end reciprocating pump 26, injection pump 12 pushes gas in the tubule device with the speed of 0.01mL/min, and simultaneously endpiece reciprocating pump 27 moves back pump automatically at the P1 pressure constant state; B. when the gas of 1.5 times of volume of voids (PV) gets into tubule 20, break off intermediate receptacle 11; C. endpiece reciprocating pump 27 is provided with constant speed state and the startup that changes to 0.01mL/min speed, 26 in inlet end reciprocating pump is set at the P1 pressure constant state and moves back pump automatically; D. after endpiece reciprocating pump 27 is all released the pump inner fluid, be set to the P1 pressure constant state moves back pump automatically 26 constant speed states that are set at 0.01mL/min speed of inlet end reciprocating pump this moment; E. repeating step c once; F. close endpiece reciprocating pump 27, the fluid egress point of end cap 202 is connected with check valve 14, inlet end reciprocating pump 26 is set at the constant speed state of 0.01mL/min speed and starts, and collects produced fluid.Inlet end reciprocating pump 26 cuts out after the pump inner fluid all flows out; Continue unlatching injection pump 12 and gas intermediate receptacle 11, inject 1.5PV gas with the speed of 0.01mL/min, guarantee the interior fluid (oil phase) of single tubule by abundant output, experiment finishes.Calculate the recovery ratio η 1 under the P1 pressure.
In above-mentioned saturated oil step and gas drive experimentation, (the recovery ratio η 1～η 6 under the pressure of P2～P6) that through to the measurement of every tubule under the different pressures condition, can obtain second to the 6th successively; When a certain pressure test effect was produced query, No. seven pipes capable of using were mended survey.
Confirm minimum miscible pressure.Utilize the 6 groups of data of surveying, match pressure and recovery ratio relation curve obtain minimum miscible pressure according to knee point.This step is identical with known method, repeats no more at this.
At above-mentioned experimentation, each stage flow rate of fluid is not limited to 0.01mL/min, and its concrete speed requires design according to actual experiment and decides, and for example can in 0.005～5mL/min scope, change.
Seven tubular type tubule measuring methods and conventional tubule method are carried out same experiment contrast, and comparing result is seen table 1.
The comparing result of two kinds of method of testings of table 1
Can know through above contrast:
Multitube tubule measuring method of the present invention guarantees smooth and easy the carrying out of individual event pressure test, and conventional tubule experimental technique is prone to stop up, and causes to remeasure, prolong experimental period.Measuring method of the present invention has realized concentrated saturated oil step, has avoided the step that will clean tubule before each the measurement in the conventional method.Measuring method of the present invention through the reciprocal time of fluid-mixing in tubule can qualitative description the complexity of the alternate mixed phase of different gas-liquids; Data presentation in the table 1; It is lower that multitube tubule measuring method records the result, proves that the exchange of the component between gas phase and oil phase is more abundant in tubule.
The above is merely the schematic embodiment of the present invention, is not in order to limit scope of the present invention.Any those skilled in the art, equivalent variations and the modification under the prerequisite that does not break away from design of the present invention and principle, done all should belong to the scope that the present invention protects.And need to prove; Each ingredient of the present invention is not limited in above-mentioned overall applicability; Each technical characterictic of describing in the instructions of the present invention can select one to adopt or select the multinomial use that combines separately according to actual needs; Therefore, other combination relevant with this case inventive point and concrete the application have been contained in the present invention in the nature of things.
Claims (19)
1. the minimum miscible pressure measuring method of a multitube comprises:
A, tubule are filled and presented, in every tubule, insert can simulated formation in the silica sand of understressed sand, with the tubule two ends add filtering plug, pressure cap is fastening;
B, every tubule is carried out the saturated oil operation;
The inlet end of C, said tubule is connected with a reciprocating pump respectively with endpiece;
D, selection be a tubule wherein; Carry out the gas drive experiment under first pressure condition; Gas and crude oil are back and forth flowed at least one time in single tubule,, make two to reach sufficient mixing mutually by said tubule inner pore effect on structure; And obtain the fluid that this root tubule is discharged under first pressure condition, draw the recovery ratio of this root tubule under first pressure condition;
E, the other tubule of selection, repetition above-mentioned steps D obtains the recovery ratio under the different pressures condition successively under another pressure condition;
F, utilize the measured data of respectively organizing, match pressure and recovery ratio relation curve obtain minimum miscible pressure value according to knee point.
2. the minimum miscible pressure measuring method of multitube as claimed in claim 1 is characterized in that above-mentioned steps B further comprises:
B1, the inlet end of opening each said tubule and endpiece interface operation valve pump into crude oil with first pressure in each said tubule, and the check valve pressure that is connected with the endpiece of said tubule is set at first pressure;
B2, when displacement volume during greater than the twice of every tubule void volume sum, the interface operation valve that only keeps tubule two ends is opened the interface operation valve of closing all the other said tubule two ends;
B3, when continuing the single tubule volume of voids of one times of displacement, the interface operation valve of closing these root tubule two ends;
B4, the interface operation valve of opening another root tubule two ends repeat above-mentioned steps b3, and each root tubule is carried out displacement, accomplish until the every whole saturated oil of tubule, and close the interface operation valve of every tubule.
3. the minimum miscible pressure measuring method of multitube as claimed in claim 1 is characterized in that above-mentioned steps D further comprises:
1) opens the valve of the inlet end reciprocating pump that gas intermediate receptacle valve is connected with said tubule inlet end; Gas is pushed in the tubule device through intermediate receptacle, the endpiece reciprocating pump that is connected with said tubule endpiece simultaneously moves back pump automatically under the first constant pressure state;
When 2) gas volume in getting into said tubule is 1.5 times of tubule void volume, closes intermediate receptacle and stop air feed;
3) start the endpiece reciprocating pump, and the fluid in the said endpiece reciprocating pump is oppositely pushed in the said tubule, and said inlet end reciprocating pump then is set at the first constant pressure state and moves back pump automatically with constant speed;
4) after the endpiece reciprocating pump is all released the pump inner fluid, be set to moving back pump automatically with the first constant pressure state, this moment, the inlet end reciprocating pump then was set at constant speed state and startup;
5) repeating step 3) once;
6) close the endpiece reciprocating pump, the endpiece of said tubule is communicated with the check valve that is connected said tubule endpiece, the inlet end reciprocating pump is set at constant speed state and starts, and collects the fluid that said tubule endpiece is discharged.
4. the minimum miscible pressure measuring method of multitube as claimed in claim 3; It is characterized in that; Said step 6) comprises that further said inlet end reciprocating pump cuts out, and continues in said tubule, to inject the gas of 1.5 times of volume of voids after the pump inner fluid all flows out; Fluid in the said tubule can fully be discharged, guarantee that the recovery ratio of every measured said tubule is accurate.
5. the minimum miscible pressure measuring method of multitube as claimed in claim 1 is characterized in that the quantity of said tubule is to Duo at least one than the spot pressure of required measurement.
6. the minimum miscible pressure measuring method of multitube as claimed in claim 5 is characterized in that, in measuring process, when one of them spot pressure measurement result is produced query, utilizes the tubule that increases to mend survey.
7. like the minimum miscible pressure measuring method of each described multitube of claim 1 to 6, it is characterized in that the length of said tubule is 1M-3M.
8. like the minimum miscible pressure measuring method of each described multitube of claim 1 to 6; It is characterized in that; When the gas drive experiment of carrying out above-mentioned steps D, four plungers of said inlet end reciprocating pump and endpiece reciprocating pump all are in the top of pump, do not have fluid before the pump inner plunger.
9. the minimum miscible pressure measuring method of multitube as claimed in claim 8 is characterized in that the useful space in said inlet end reciprocating pump and the endpiece reciprocating pump is greater than 1.5 times of every tubule void volume.
10. the minimum miscible pressure measurement mechanism of multitube is characterized in that, the minimum miscible pressure measurement mechanism of said multitube comprises:
Many tubules are connected in parallel, and are filled with the silica sand of understressed sand in the simulated formation in every said tubule, and the two ends of said tubule are connected with fluid egress point with fluid intake respectively;
One injection pump is connected with said fluid intake through an intermediate receptacle, and said fluid egress point is connected with check valve; Wherein, be connected with an inlet end reciprocating pump between said fluid intake and the intermediate receptacle, be connected with the endpiece reciprocating pump between said fluid egress point and the check valve;
The two ends of every said tubule are provided with can control the interface operation valve that it is communicated with or closes with fluid intake and fluid egress point.
11. the minimum miscible pressure measurement mechanism of multitube as claimed in claim 10; It is characterized in that; The two ends of said tubule are connected with end cap respectively, and said end cap is provided with the tubule interface that a plurality of and said tubule matches and is connected, and fluid intake or fluid egress point; Said tubule interface can be connected with said fluid intake or fluid egress point.
12. the minimum miscible pressure measurement mechanism of multitube as claimed in claim 11; It is characterized in that; Said end cap is provided with the said tubule interface of two rows; Be connected through the connection runner that is arranged in the said end cap between every row's a plurality of said tubule interface; Be provided with said fluid intake or fluid egress point between the said tubule interface of said two rows, said fluid intake or fluid egress point are connected with each said tubule interface through sprue and connection runner, and said connection runner and sprue in the said end cap constitute I-shaped path.
13. the minimum miscible pressure measurement mechanism of multitube as claimed in claim 11; It is characterized in that; Said end cap comprises two interface tube blocks, a main contiguous block; Wherein, said interface tube block is provided with the more than one tubule interface that can be connected with said tubule, is connected by being communicated with runner between each tubule interface; One side of said main contiguous block is provided with fluid intake or fluid egress point, and said liquid inlet or fluid egress point are connected with the sprue of the said main contiguous block of perforation; The two ends of said main contiguous block are connected with the interface tube block respectively, and the two ends of said sprue are connected with the connection runner of said interface tube block respectively, constitute I-shaped path.
14. the minimum miscible pressure measurement mechanism of multitube as claimed in claim 13 is characterized in that said two rectangular tube interface body two ends are fixedly connected with a side contiguous block respectively, constitute said end cap.
15. the minimum miscible pressure measurement mechanism of multitube as claimed in claim 10 is characterized in that said intermediate receptacle, inlet end reciprocating pump, endpiece reciprocating pump, tubule all are arranged in the constant temperature oven.
16. the minimum miscible pressure measurement mechanism of multitube as claimed in claim 10 is characterized in that said check valve is connected with measuring container, measuring container is connected with the endpiece reciprocating pump, can accept the fluid of discharging in the endpiece reciprocating pump.
17. the minimum miscible pressure measurement mechanism of multitube as claimed in claim 10 is characterized in that the quantity of said tubule is to Duo at least one than the spot pressure of required measurement.
18. the minimum miscible pressure measurement mechanism of multitube as claimed in claim 10 is characterized in that the length of said tubule is 1m-3m.
19. the minimum miscible pressure measurement mechanism of multitube as claimed in claim 10 is characterized in that the useful space in said inlet end reciprocating pump and the endpiece reciprocating pump is greater than 1.5 times of every tubule void volume.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104462753A (en) * | 2014-10-31 | 2015-03-25 | 中国石油化工股份有限公司 | CO2 flooding minimum miscrible pressure prediction method |
| CN105181222A (en) * | 2015-10-12 | 2015-12-23 | 东北石油大学 | Device for measuring carbon dioxide minimum miscible pressure in multiple modes |
| CN105258840A (en) * | 2015-11-12 | 2016-01-20 | 东北石油大学 | Method for measuring optimum miscible pressure and miscible region of carbon dioxide between injection and production wells |
| CN105403347A (en) * | 2015-11-27 | 2016-03-16 | 中国石油化工股份有限公司 | Measurement and determination method for minimum miscible pressure of CO2 flooding and special-purpose apparatus thereof |
| CN106840790A (en) * | 2016-12-23 | 2017-06-13 | 东北石油大学 | CO is tested based on tubule consolidated model long2The method and system of crude oil MMP |
| CN109184640A (en) * | 2018-10-25 | 2019-01-11 | 中国石油化工股份有限公司 | The experimental provision of heterogeneous water drive oil seepage flow in multitube simulation layer |
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| CN108952648B (en) * | 2018-08-30 | 2020-11-06 | 陕西延长石油(集团)有限责任公司研究院 | Minimum miscible pressure calculation method for carbon dioxide and formation crude oil in Ordos basin |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB639281A (en) * | 1947-11-26 | 1950-06-28 | Mini Of Supply | Improvements in or relating to pressure measuring apparatus |
| US3865549A (en) * | 1971-10-07 | 1975-02-11 | Wellcome Found | Auto-analytical apparatus and analytical methods |
| CN1129319A (en) * | 1994-10-05 | 1996-08-21 | 顺德珠江传感器厂 | Method for reading and processing data measured for petroleum product distillation |
| CN201583517U (en) * | 2009-12-17 | 2010-09-15 | 中国海洋石油总公司 | Testing device for generating and decomposing natural gas hydrate |
| CN202916038U (en) * | 2012-08-15 | 2013-05-01 | 中国石油天然气股份有限公司 | Multi-tube measurement apparatus for minimum miscible pressure |
-
2012
- 2012-08-15 CN CN201210289799.1A patent/CN102798499B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB639281A (en) * | 1947-11-26 | 1950-06-28 | Mini Of Supply | Improvements in or relating to pressure measuring apparatus |
| US3865549A (en) * | 1971-10-07 | 1975-02-11 | Wellcome Found | Auto-analytical apparatus and analytical methods |
| CN1129319A (en) * | 1994-10-05 | 1996-08-21 | 顺德珠江传感器厂 | Method for reading and processing data measured for petroleum product distillation |
| CN201583517U (en) * | 2009-12-17 | 2010-09-15 | 中国海洋石油总公司 | Testing device for generating and decomposing natural gas hydrate |
| CN202916038U (en) * | 2012-08-15 | 2013-05-01 | 中国石油天然气股份有限公司 | Multi-tube measurement apparatus for minimum miscible pressure |
Non-Patent Citations (1)
| Title |
|---|
| 许瀚元: "细管实验法确定最小混相压力的方法", 《内江科技》 * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104462753B (en) * | 2014-10-31 | 2018-09-18 | 中国石油化工股份有限公司 | A kind of CO2Drive the prediction technique of minimum miscibility pressure |
| CN104462753A (en) * | 2014-10-31 | 2015-03-25 | 中国石油化工股份有限公司 | CO2 flooding minimum miscrible pressure prediction method |
| CN105181222A (en) * | 2015-10-12 | 2015-12-23 | 东北石油大学 | Device for measuring carbon dioxide minimum miscible pressure in multiple modes |
| CN105258840A (en) * | 2015-11-12 | 2016-01-20 | 东北石油大学 | Method for measuring optimum miscible pressure and miscible region of carbon dioxide between injection and production wells |
| CN105258840B (en) * | 2015-11-12 | 2016-11-09 | 东北石油大学 | A kind of method measuring the optimal miscible pressure of carbon dioxide between injection-production well and mixed phase region |
| CN105403347A (en) * | 2015-11-27 | 2016-03-16 | 中国石油化工股份有限公司 | Measurement and determination method for minimum miscible pressure of CO2 flooding and special-purpose apparatus thereof |
| CN105403347B (en) * | 2015-11-27 | 2019-09-06 | 中国石油化工股份有限公司 | CO2Drive THE MINIMUM MISCIBLE PRESSURE method and dedicated unit |
| CN106840790A (en) * | 2016-12-23 | 2017-06-13 | 东北石油大学 | CO is tested based on tubule consolidated model long2The method and system of crude oil MMP |
| CN106840790B (en) * | 2016-12-23 | 2019-10-29 | 东北石油大学 | CO is tested based on long tubule consolidated model2The method and system of crude oil MMP |
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| CN109184640A (en) * | 2018-10-25 | 2019-01-11 | 中国石油化工股份有限公司 | The experimental provision of heterogeneous water drive oil seepage flow in multitube simulation layer |
| CN111579144A (en) * | 2020-04-08 | 2020-08-25 | 中国海洋大学 | Synchronous measurement device and method for double-dispersion interface pressure in emulsion and application |
| CN111364985A (en) * | 2020-05-15 | 2020-07-03 | 西南石油大学 | Thin tube experiment device with pressure covering function and using method |
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