CN113565480A

CN113565480A - Lipopeptide-containing composite oil displacement agent and use method thereof

Info

Publication number: CN113565480A
Application number: CN202110662681.8A
Authority: CN
Inventors: 黄文庆; 董喜贵; 赵劲毅; 李国桥; 郝金生; 孙琦; 孙远卓; 纪海龙; 闵洁; 仲丛欣; 董帅; 孙雨飞
Original assignee: Petrochina Co Ltd; Daqing Oilfield Co Ltd
Current assignee: Petrochina Co Ltd; Daqing Oilfield Co Ltd
Priority date: 2021-06-15
Filing date: 2021-06-15
Publication date: 2021-10-29
Anticipated expiration: 2041-06-15
Also published as: CN113565480B

Abstract

The invention relates to a lipopeptide-containing composite oil-displacing agent and a using method thereof, and the lipopeptide-containing composite oil-displacing agent comprises the steps of S1, injecting a weak base solution into a stirring chamber through a first injection port for stirring, injecting a first composition formed by petroleum sulfonate and lipopeptide into the stirring chamber through a second injection port for stirring with the weak base solution to form a second composition, injecting a polymer into the stirring chamber through a third injection port for mixing with the second composition to form the lipopeptide-containing composite oil-displacing agent; step S2, starting an infusion pump, conveying the lipopeptide-containing composite oil-displacing agent to an injection pipe through a detection pipe, starting an adjusting valve by a central control unit, and injecting the lipopeptide-containing composite oil-displacing agent into the natural core; in step S3, the central control unit controls the oil recovery device to recover oil. The invention is provided with a central control unit, the input amount of different materials is controlled by arranging different injection ports according to the real-time viscosity of the formed lipopeptide-containing composite oil displacement agent, and the recovery ratio of oil recovery is improved by adjusting the delivery pressure of an input pump and the opening area of an injection pipeline adjusting valve.

Description

Lipopeptide-containing composite oil displacement agent and use method thereof

Technical Field

The invention relates to the field of oil displacement agents, in particular to a lipopeptide-containing composite oil displacement agent and a using method thereof.

Background

The development of oil fields is divided into three processes: firstly, exploiting by utilizing natural energy such as elastic energy of reservoir fluid, water pressure of side water, gravity of crude oil, gas cap pressure and the like, called primary oil recovery, wherein the recovery ratio is about 20-30%; secondly, when natural energy is gradually consumed and no exploitation capability exists, measures such as gas injection, water injection and the like are manually adopted to keep the pressure of the oil reservoir to be exploited continuously, namely gas drive and water drive exploitation, namely secondary oil recovery, wherein the recovery ratio is about 20-40%; thirdly, after the oil reservoir pressure is supplemented and the oil reservoir can not be continuously exploited, chemical agents such as chemical substances, solvents, heat carriers and the like are artificially injected to be used as oil displacement media for oil displacement exploitation, and the oil displacement exploitation is called tertiary oil recovery. The recovery ratio of tertiary oil recovery is larger according to different process differences, and is generally 50-70%.

At present, oil displacement systems commonly used in oil fields comprise a strong alkali ternary system and a weak alkali ternary system. The strong alkali ternary system consists of heavy alkylbenzene sulfonate, polymer and sodium hydroxide, and the weak alkali ternary system consists of petroleum sulfonate, polymer and sodium carbonate. The existing weak base ternary system oil displacement system has high cost, a lifting system caused by scaling of an extraction well is serious, the difficulty of a ground treatment system is increased, the scaling problem of the extraction well causes series problems of yield reduction, recovery ratio reduction and the like, and due to the complexity of the scaling condition in the oil extraction process, the problem of scaling under different conditions cannot be solved by singly using the lipopeptide-containing composite oil displacement agent with the same material content.

Disclosure of Invention

Therefore, the invention provides a lipopeptide-containing composite oil displacement agent and a using method thereof, which can solve the technical problem that the crude oil recovery rate cannot be improved by using the oil displacement agent.

In order to achieve the above object, the present invention provides a method for using a lipopeptide-containing composite oil-displacing agent, comprising:

step S1, injecting a weak base solution into the stirring chamber through the first injection port for stirring, injecting a first composition formed by petroleum sulfonate and lipopeptide into the stirring chamber through the second injection port for stirring with the weak base solution to form a second composition, injecting a polymer into the stirring chamber through the third injection port for mixing and stirring with the second composition to form a composite oil displacement agent containing lipopeptide;

step S2, starting an infusion pump, conveying the lipopeptide-containing composite oil-displacing agent to an injection pipe through a detection pipe, starting an adjusting valve by a central control unit, and injecting the lipopeptide-containing composite oil-displacing agent into the natural core;

step S3, the central control unit controls an oil extraction device to extract oil;

the detection pipe comprises a first detection pipeline and a second detection pipeline, one end of the first detection pipeline is connected with the discharge hole of the stirring chamber, the other end of the first detection pipeline is connected with the second detection pipeline, and an included angle formed by the first detection pipeline and the horizontal plane is larger than that formed by the second detection pipeline and the horizontal plane; the method comprises the following steps that a lipopeptide-containing composite oil-displacing agent is conveyed to a liquid injection pipe through a detection pipe, a central control unit obtains the moving distance of the current lipopeptide-containing composite oil-displacing agent in a second detection pipeline within a preset time through an image processing device, the height of the lipopeptide-containing composite oil-displacing agent staying at the joint of a first detection pipeline and the second detection pipeline is set as S, the height of the lipopeptide-containing composite oil-displacing agent is set as H, the central control unit obtains the viscosity M of the current lipopeptide-containing composite oil-displacing agent, and M = M × H/H0 × S/S0 is set, wherein H0 is the standard height of the lipopeptide-containing composite oil-displacing agent, S0 is the standard displacement of the lipopeptide-containing composite oil-displacing agent, and M is the standard viscosity of the lipopeptide-containing composite oil-displacing agent; when the viscosity of the lipopeptide-containing composite oil-displacing agent is lower than a preset standard, the central control unit increases the input amount of the first composition and increases the driving speed of the lipopeptide-containing composite oil-displacing agent; if the viscosity of the lipopeptide-containing composite oil-displacing agent is higher than a preset standard, the central control unit reduces the input amount of the polymer and the driving speed of the lipopeptide-containing composite oil-displacing agent;

the liquid injection pipe is connected with the detection pipe and used for injecting the compound oil displacement agent containing lipopeptide into the natural rock core, an infusion pump is arranged at a feed inlet of the liquid injection pipe and used for providing power for injecting the compound oil displacement agent containing lipopeptide into the liquid injection pipe, the liquid injection pipe comprises a plurality of liquid injection pipelines, the liquid injection pipelines are uniformly distributed on the outer side of the well wall of the oil extraction device, and an adjusting valve is arranged at a liquid outlet of each liquid injection pipeline and used for adjusting the opening area of the liquid outlet of the liquid injection pipeline; when the central control unit judges that the driving speed of the compound oil displacement agent containing lipopeptide needs to be increased, the central control unit increases the conveying pressure of the infusion pump and reduces the opening area of the regulating valve; when the central control unit judges that the driving speed of the compound oil displacement agent containing lipopeptide needs to be reduced, the central control unit reduces the delivery pressure of the infusion pump and increases the opening area of the regulating valve so as to enable the driving speed of the compound oil displacement agent containing lipopeptide to meet the preset standard;

the oil extraction device is internally provided with a descaling device which is arranged in the oil extraction device and used for removing scale generated in the oil extraction process, the descaling device comprises a detection device, the detection device is arranged in the descaling device and used for acquiring the scale weight, and the descaling device also comprises a descaling knife which is arranged at the top of the descaling device and used for scraping the scale on the well wall of the oil extraction device; the oil displacement agent detection device comprises a detection device, a central control unit and an oil displacement agent detection unit, wherein the detection device is used for detecting the scaling amount in oil in the oil extraction process;

when the central control unit judges that the descaling needs to be carried out on the well wall of the oil extraction device, the central control unit adjusts the opening area of the regulating valve of the liquid injection pipeline opening according to the obtained well wall scaling amount, if the well wall scaling amount is smaller than a preset value, the central control unit judges that the current liquid injection amount of the liquid injection pipeline meets a preset standard, and does not adjust the regulating valve; if the well wall scaling amount is larger than the preset value, the central control unit judges that the current liquid injection amount of the liquid injection pipeline does not accord with the preset standard, and the central control unit reduces the opening area of the regulating valve.

Further, the central control unit presets a viscosity W of the lipopeptide-containing complex oil-displacing agent, and the central control unit adds an amount T20 of the first composition, an amount T30 of the polymer and a driving speed P0 of the lipopeptide-containing complex oil-displacing agent according to the comparison between the viscosity M of the lipopeptide-containing complex oil-displacing agent and the preset viscosity, wherein,

when M is less than or equal to W1, the central control unit judges that the viscosity of the current lipopeptide-containing composite oil displacement agent does not meet the preset standard, the central control unit increases the input amount of the first composition from T20 to T21, the central control unit increases the driving speed of the lipopeptide-containing composite oil displacement agent from P0 to P1, and P1= P0 x (1+ (W1-M)/W1) is set;

when W1 is more than M and less than W2, the central control unit judges that the viscosity of the current lipopeptide-containing composite oil displacement agent meets a preset standard;

when M is larger than or equal to W2, the central control unit judges that the viscosity of the current lipopeptide-containing composite oil displacement agent does not meet the preset standard, the central control unit reduces the polymer input amount from T20 to T22, the central control unit reduces the driving speed from P0 to P2 of the lipopeptide-containing composite oil displacement agent, and P2= P0 x (1+ (M-W2)/W2) is set;

the viscosity W of the lipopeptide-containing composite oil displacement agent is preset in the central control unit, and the viscosity W1 of the lipopeptide-containing composite oil displacement agent is preset in the first step, and the viscosity W2 of the lipopeptide-containing composite oil displacement agent is preset in the second step.

Further, when the viscosity M of the lipopeptide-containing composite oil-displacing agent obtained by the central control unit is less than or equal to the viscosity W1 of a first preset lipopeptide-containing composite oil-displacing agent, the central control unit adjusts the input amount T20 to T21 of the first composition according to the difference value between the real-time adhesion degree and the preset adhesion degree, and sets T21= T20^{(1+(W1-M)/W1)}When the viscosity M of the lipopeptide-containing composite oil-displacing agent obtained by the central control unit is greater than or equal to the viscosity W2 of a second preset lipopeptide-containing composite oil-displacing agent, the central control unit adjusts the input amount of the first composition from T20 to T22 according to the difference between the real-time adhesion degree and the preset adhesion degree, and sets T22= T20^(1-(M-W2)W2)。

Further, the central control unit obtains the real-time driving speed of the compound oil displacement agent containing lipopeptide, and adjusts the conveying pressure F0 of the conveying pump and the opening area D0 of the adjusting valve according to the comparison between the real-time driving speed Pi and the preset driving speed P0 of the compound oil displacement agent containing lipopeptide, wherein,

when Pi ≧ P0, the central control unit increases the transfer pump transfer pressure F0 to F1, setting F1= F0 × (1+ ((Pi-P0)/P0)²) The central control unit reduces the opening area D0-D1 of the regulating valve, and sets D1= D0 × (1- (Pi-P0)/P0);

when Pi < P0, the central control unit decreases the delivery pump delivery pressure F0 to F2, setting F2= F0 × (1- ((P0-Pi)/P0)²) And the central control unit increases the opening areas D0-D2 of the regulating valves and sets D2= D0 × (1+ (P0-Pi)/P0).

Further, the central control unit obtains the real-time driving speed of the composite oil displacement agent containing lipopeptide, the central control unit presets the in-oil scaling amount G, compares the in-oil scaling amount H obtained in single oil extraction with the preset in-oil scaling amount, adjusts the injection amount of weak base solution and removes the scaling on the well wall, wherein,

when H is less than or equal to G1, the central control unit judges that the oil displacement agent meets the preset standard;

when G1 is more than H and less than G2, the central control unit judges that the oil displacement agent does not meet the preset standard, and the central control unit reduces the injection amount of the weak base solution from T10 to T11;

when H is larger than or equal to G2, the central control unit judges that the oil displacement agent does not meet the preset standard, and the central control unit controls the descaling device to remove the scale on the well wall of the oil extraction device;

the method comprises the steps that the intermediate control unit presets an in-oil scaling amount G, and the first preset in-oil scaling amount G1 and the second preset in-oil scaling amount G2 are set.

Further, when the amount of in-oil fouling obtained when the central control unit obtains the single oil recovery is between the first preset amount of in-oil fouling and the second preset amount of in-oil fouling G2, the central control unit reduces the weak base solution injection amount T10 to T11, set to T11= T10 × (1- (H-G1) × (G2-H)/(G1 × G2)).

Further, the central control unit presets a plurality of well wall descaling areas, including a first descaling area, a second descaling area and an nth descaling area, the central control unit obtains a weight difference value between an initial weight mi0 when the scaling device removes the well wall scaling of the ith area and a weight mi1 after removing the well wall scaling of the ith area as a well wall scaling amount Δ mi of the ith area, and sets Δ mi = mi1-mi0, the central control unit adjusts the opening area of the liquid injection pipe adjusting valve of the ith area according to the comparison between the scaling amount Δ mi of the ith area and a preset weight difference value, wherein,

when the delta mi is less than or equal to K1, the central control unit increases the opening area Di to Di1 of the regulating valve of the liquid injection pipeline of the ith descaling area, and sets Di1= Di x (1+ (K1-delta mi)/K1);

when K1 is less than delta mi and less than K2, the central control unit does not adjust the opening area of the liquid injection pipeline adjusting valve;

when the delta mi is larger than or equal to K2, the central control unit reduces the opening area Di to Di2 of the regulating valve of the liquid injection pipeline of the ith descaling area, and sets Di2= Di x (1- (. DELTA mi-K2)/K2);

the well wall scaling amount K is preset in the central control unit, and the first preset well wall scaling amount K1 and the second preset well wall scaling amount K2 are set.

Furthermore, a temporary storage device is arranged outside the well wall of the oil extraction device, the temporary storage device comprises a temporary storage pipe which is arranged at an oil outlet of the well wall of the oil extraction device and used for temporarily storing extracted oil, and the temporary storage device also comprises an electromagnetic valve mechanism which is arranged on the temporary storage pipe and used for controlling the stored oil amount; the central control unit obtains the first borehole wall descaling 1 Delta mi of the i-th area, the second borehole wall descaling weight difference 2 Delta mi of the i-th area and the nth borehole wall descaling weight difference n Delta mi of the i-th area, the central control unit obtains the q-th borehole wall descaling weight difference q Delta mi of the i-th area and the (q-1) th borehole wall descaling weight difference (q-1) Delta mi of the i-th area as the scaling weight difference E of adjacent descaling times, and sets E = q Delta mi- (q-1) Delta mi, wherein q =1,2 to n,

when E is less than or equal to L1, the central control unit judges that the descaling effect of the current region does not meet the preset standard, the central control unit increases the temporary oil quantity Q0 to Q01 of the temporary storage device, and sets Q01= Q0 x (1+ (L1-E)/L1);

when L1 is more than E and less than L2, the central control unit judges that the current descaling effect meets the preset standard;

when E is larger than or equal to L2, the central control unit judges that the descaling effect of the current area does not meet the preset standard, the central control unit reduces conveying pressure Fi of the conveying pump to Fi1, sets Fi1= Fi x (1- (E-L2)/L2), reduces opening area Dir of the regulating valve to Dir1, sets Dir1= Dir x (1- ((E-L2)/L2)²)；

The central control unit presets a scaling weight difference L of the adjacent descaling times of the current area, sets a scaling weight difference L1 of the adjacent descaling times of the first preset current area and a scaling weight difference L2 of the adjacent descaling times of the second preset current area, wherein i =1,2, r =1, 2.

The invention further provides a lipopeptide-containing composite oil displacement agent, which is characterized by comprising 0.15-0.25 wt% of petroleum sulfonate, 1.1-2.2 wt% of polymer, 0.9-1.2 wt% of weak base, 0.15-0.25 wt% of lipopeptide and the balance of water.

Further, the ratio of petroleum sulfonate to lipopeptide is 1:1, and the surfactant concentration is 0.4%.

Compared with the prior art, the oil displacement agent has the beneficial effects that the central control unit is arranged, the input amount of different materials is controlled by arranging different injection ports according to the real-time viscosity of the formed lipopeptide-containing composite oil displacement agent, and the recovery ratio of oil recovery is improved by adjusting the delivery pressure of an input pump and the opening area of an injection pipeline regulating valve. Specifically, when the viscosity of the lipopeptide-containing composite oil-displacing agent is lower than a preset standard, the central control unit increases the input amount of the first composition and increases the driving speed of the lipopeptide-containing composite oil-displacing agent; if the viscosity of the lipopeptide-containing composite oil-displacing agent is higher than a preset standard, the central control unit reduces the input amount of the polymer and the driving speed of the lipopeptide-containing composite oil-displacing agent; when the central control unit judges that the driving speed of the compound oil displacement agent containing lipopeptide needs to be increased, the central control unit increases the conveying pressure of the infusion pump and reduces the opening area of the regulating valve; when the central control unit judges that the driving speed of the compound oil displacement agent containing lipopeptide needs to be reduced, the central control unit reduces the delivery pressure of the infusion pump and increases the opening area of the regulating valve so that the driving speed of the compound oil displacement agent containing lipopeptide meets the preset standard. The method comprises the following steps that a central control unit obtains scaling in the oil extraction process according to an arranged scaling device, the central control unit obtains the scaling amount in oil in the oil extraction process through a detection device, and if the scaling amount in oil is smaller than a preset value, the central control unit judges that an oil displacement agent meets a preset standard; if the scaling amount in the oil is larger than a preset value, the central control unit reduces the injection amount of the weak base solution and descales the well wall of the oil extraction device; when the central control unit judges that the descaling needs to be carried out on the well wall of the oil extraction device, the central control unit adjusts the opening area of the regulating valve of the liquid injection pipeline opening according to the obtained well wall scaling amount, if the well wall scaling amount is smaller than a preset value, the central control unit judges that the current liquid injection amount of the liquid injection pipeline meets a preset standard, and does not adjust the regulating valve; if the scaling amount of the well wall is larger than the preset value, the central control unit judges that the current liquid injection amount of the liquid injection pipeline does not meet the preset standard, and the central control unit reduces the opening area of the regulating valve so as to improve the oil recovery rate.

Particularly, the viscosity of the lipopeptide-containing composite oil-displacing agent is preset, and the input amount T20 of the first composition, the input amount T30 of the polymer and the driving speed P0 of the lipopeptide-containing composite oil-displacing agent are adjusted according to the comparison of the obtained viscosity and the preset value, wherein the viscosity obtained by the central control unit is less than or equal to the first preset value, which indicates that the viscosity of the lipopeptide-containing composite oil-displacing agent prepared in real time does not meet the preset standard; when the viscosity acquired by the central control unit is within the range of a first preset value and a second preset value, the central control unit judges that the viscosity of the current oil displacement agent meets a preset standard without adjusting various parameters; the central control unit obtains that the viscosity of the current oil-displacing agent is larger than or equal to a second preset value, the central control unit realizes that the viscosity of the oil-displacing agent prepared next time accords with the preset value by reducing the input amount of the polymer, and simultaneously reduces the driving speed of the composite oil-displacing agent containing lipopeptide so as to ensure the oil-displacing efficiency of the current time and the next time. The central control unit adjusts the conveying pressure of the conveying pump and the opening area of the regulating valve according to the improvement or reduction of the driving speed, specifically, when the driving speed acquired by the central control unit is greater than or equal to a preset standard value, the central control unit reduces the opening area of the regulating valve simultaneously by increasing the conveying pressure of the conveying pump to achieve the purpose of increasing the driving speed, and when the driving speed acquired by the central control unit is smaller than the preset standard value, the central control unit increases the opening area of the regulating valve simultaneously by reducing the conveying pressure of the conveying pump to achieve the purpose of reducing the driving speed.

Particularly, the injection amount of the weak base solution is adjusted and well wall scaling is eliminated by setting the in-oil scaling amount and comparing the obtained in-oil scaling amount with a preset value, whether the material proportion of the oil displacement agent is matched and whether the driving speed is properly adjusted can be judged according to the in-oil scaling amount in single oil extraction by setting a first preset value, and then the oil displacement efficiency of the oil displacement agent is judged, and when the obtained in-oil scaling amount is less than or equal to the first preset value, all parameters meet the preset standard at this time; if the obtained in-oil scaling amount is within the range of the first preset value and the second preset value, the fact that the current scaling amount is slightly large and the content of weak base in the oil displacement agent is too large is indicated, the central control unit reduces the content of weak base solution according to the difference value of the real-time value of the in-oil scaling amount and the first preset value and the second preset value, the recovery ratio is further improved, if the real-time value of the in-oil scaling amount is larger than or equal to the second preset value, the fact that the current in-oil scaling is not only scaling in crude oil, but also scaling generated by a well wall is indicated, and the central control unit judges that the well wall scaling of the oil production device is removed.

Particularly, the descaling device and the temporary storage device are arranged to remove scale on the well wall when the oil extraction device extracts oil, the well wall scaling amount is preset, and the opening area of the liquid injection pipeline regulating valve in each area is regulated by comparing the well wall scaling amount obtained by the central control unit with a preset value; if the well wall scaling amount is higher than the second preset value, the fact that the liquid injection amount of the liquid injection pipeline in the current area is too high is indicated, the scaling amount exceeds the preset standard, and the liquid injection amount needs to be reduced by reducing the opening area of the regulating valve, so that the scaling amount meets the preset standard.

Particularly, when the well wall scale is removed for the second time, the difference value of the obtained current area scale amount obtained by the central control unit and the obtained previous time when the well wall scale is removed is set as the scale weight difference of the adjacent descaling times, if the scale weight difference of the adjacent descaling times of the current area is less than or equal to a first preset value, the central control unit judges that the current descaling effect is poor, the temporary storage oil quantity of the temporary storage device needs to be increased, so that the descaling time of the descaling knife and the well wall is prolonged, and the descaling is more thorough; if the scaling weight difference of the adjacent descaling times of the current area is within the range of a first preset value and a second preset value, the current descaling effect is better, all parameters are not required to be adjusted, if the scaling weight difference of the adjacent descaling times of the current area is greater than or equal to the second preset value, the scaling amount generated by the well wall is too large, the application of the oil displacement agent is not in accordance with the preset standard, the central control unit reduces the conveying pressure of the conveying pump and simultaneously reduces the opening area of the regulating valve, the conveying amount of the oil displacement agent is reduced, the generation of more scales is avoided, and the crude oil recovery ratio is influenced.

In particular, the lipopeptide-containing composite oil displacement agent developed by the invention has low cost and low concentration of petroleum sulfonate.

Drawings

FIG. 1 is a schematic diagram of a method for using a lipopeptide-containing composite oil displacement agent in an embodiment of the invention;

FIG. 2 is a schematic structural diagram of a compound oil displacement agent using device containing lipopeptide according to an embodiment of the invention;

FIG. 3 is a graph showing the change in interfacial tension of petroleum sulfonate and lipopeptide complex systems at different ratios in accordance with the present invention;

FIG. 4 is a graph showing the change of interfacial tension with different dilution times in a compound system according to an embodiment of the present invention;

FIG. 5 is a graph of interfacial tension of a compounded system of an embodiment of the invention as a function of sodium chloride concentration;

FIG. 6 is a viscosity curve of a compounded system of an embodiment of the invention as a function of sodium chloride concentration;

FIG. 7 is a graph showing interfacial tension of a formulated system according to an embodiment of the present invention as a function of Ca and Mg ion concentration;

FIG. 8 is a viscosity curve of a compound system of an embodiment of the invention as a function of calcium and magnesium ion concentration.

Detailed Description

In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1, it is shown that the method for using the lipopeptide-containing composite oil displacement agent according to the embodiment of the present invention includes,

referring to fig. 2, which is a schematic structural diagram of a device for using a lipopeptide-containing composite oil displacement agent according to an embodiment of the present invention, the device includes a detection tube including a first detection tube 17 and a second detection tube 16, one end of the first detection tube is connected to a discharge port of the stirring chamber, and the other end of the first detection tube is connected to the second detection tube, wherein an included angle θ 1 formed by the first detection tube and a horizontal plane is greater than an included angle θ 2 formed by the second detection tube and the horizontal plane; the method comprises the following steps that a lipopeptide-containing composite oil-displacing agent is conveyed to a liquid injection pipe through a detection pipe, a central control unit obtains the moving distance of the current lipopeptide-containing composite oil-displacing agent in a second detection pipeline within a preset time through an image processing device, the height of the lipopeptide-containing composite oil-displacing agent staying at the joint of a first detection pipeline and the second detection pipeline is set as S, the height of the lipopeptide-containing composite oil-displacing agent is set as H, the central control unit obtains the viscosity M of the current lipopeptide-containing composite oil-displacing agent, and M = M × H/H0 × S/S0 is set, wherein H0 is the standard height of the lipopeptide-containing composite oil-displacing agent, S0 is the standard displacement of the lipopeptide-containing composite oil-displacing agent, and M is the standard viscosity of the lipopeptide-containing composite oil-displacing agent; when the viscosity of the lipopeptide-containing composite oil-displacing agent is lower than a preset standard, the central control unit increases the input amount of the first composition and increases the driving speed of the lipopeptide-containing composite oil-displacing agent; if the viscosity of the lipopeptide-containing composite oil-displacing agent is higher than a preset standard, the central control unit reduces the input amount of the polymer and the driving speed of the lipopeptide-containing composite oil-displacing agent;

the oil extraction device is internally provided with a descaling device which is arranged in the oil extraction device and used for removing scale generated in the oil extraction process, the descaling device comprises a detection device, the detection device is arranged in the descaling device and used for acquiring the scale weight, and the descaling device also comprises a descaling knife which is arranged at the top of the descaling device and used for scraping the scale on the well wall of the oil extraction device; the central control unit acquires the scaling amount in the oil extraction process through the detection device, and if the scaling amount in the oil is smaller than a preset value, the central control unit judges that the oil displacement agent meets a preset standard; if the scaling amount in the oil is larger than a preset value, the central control unit reduces the injection amount of the weak base solution and descales the well wall of the oil extraction device;

when the central control unit judges that the descaling needs to be carried out on the well wall of the oil extraction device, the central control unit adjusts the opening area of the regulating valve of the liquid injection pipeline opening according to the obtained well wall scaling amount, if the well wall scaling amount is smaller than a preset value, the central control unit judges that the current liquid injection amount of the liquid injection pipeline meets a preset standard, and does not adjust the regulating valve; if the scaling amount of the well wall is larger than the preset value, the central control unit judges that the current liquid injection amount of the liquid injection pipeline does not meet the preset standard, and the central control unit reduces the opening area of the regulating valve so as to improve the oil recovery rate.

Specifically, the central control unit is arranged, the input amount of different materials is controlled by arranging different injection ports according to the real-time viscosity of the formed lipopeptide-containing composite oil displacement agent, and the recovery ratio of oil recovery is improved by adjusting the delivery pressure of an input pump and the opening area of an injection pipeline adjusting valve. Specifically, when the viscosity of the lipopeptide-containing composite oil-displacing agent is lower than a preset standard, the central control unit increases the input amount of the first composition and increases the driving speed of the lipopeptide-containing composite oil-displacing agent; if the viscosity of the lipopeptide-containing composite oil-displacing agent is higher than a preset standard, the central control unit reduces the input amount of the polymer and the driving speed of the lipopeptide-containing composite oil-displacing agent; when the central control unit judges that the driving speed of the compound oil displacement agent containing lipopeptide needs to be increased, the central control unit increases the conveying pressure of the infusion pump and reduces the opening area of the regulating valve; when the central control unit judges that the driving speed of the compound oil displacement agent containing lipopeptide needs to be reduced, the central control unit reduces the delivery pressure of the infusion pump and increases the opening area of the regulating valve so that the driving speed of the compound oil displacement agent containing lipopeptide meets the preset standard. The method comprises the following steps that a central control unit obtains scaling in the oil extraction process according to an arranged scaling device, the central control unit obtains the scaling amount in oil in the oil extraction process through a detection device, and if the scaling amount in oil is smaller than a preset value, the central control unit judges that an oil displacement agent meets a preset standard; if the scaling amount in the oil is larger than a preset value, the central control unit reduces the injection amount of the weak base solution and descales the well wall of the oil extraction device; when the central control unit judges that the descaling needs to be carried out on the well wall of the oil extraction device, the central control unit adjusts the opening area of the regulating valve of the liquid injection pipeline opening according to the obtained well wall scaling amount, if the well wall scaling amount is smaller than a preset value, the central control unit judges that the current liquid injection amount of the liquid injection pipeline meets a preset standard, and does not adjust the regulating valve; if the scaling amount of the well wall is larger than the preset value, the central control unit judges that the current liquid injection amount of the liquid injection pipeline does not meet the preset standard, and the central control unit reduces the opening area of the regulating valve so as to improve the oil recovery rate.

Fig. 2 is a schematic diagram showing a structure of equipment for using the lipopeptide-containing composite oil displacement agent according to the embodiment of the present invention, including an oil recovery device 6 for collecting crude oil; the descaling device 14 is arranged in the oil production device and is used for removing scales inside the oil production device and on the well wall; the scaling device comprises an adsorption net 10, a scaling knife 13 and a scale removing knife, wherein the adsorption net 10 is arranged in the scaling device and used for adsorbing scaling, the scale removing device also comprises a weight sensor 9 which is arranged on the adsorption net and used for acquiring the weight of the scaling, the scaling device also comprises a scale removing knife 13 which is arranged on the structural device and used for removing the scaling on the well wall of the oil extraction device, the scale removing knife is opened and closed under the action of pressure, the scale removing knife is opened and closed according to the pressure, the pressure above the scale removing knife is greater than that below the scale removing knife, and the scale removing knife is opened when the pressure above the scale removing knife is less than or equal to that above the scale removing knife so as to remove the scaling on the well wall of the oil extraction device; the oil extraction device comprises an oil well pump 16 arranged in the oil extraction device and used for extracting crude oil, and further comprises a free valve 12 and a fixed valve 15, wherein the fixed valve is arranged at the bottom of the oil extraction device, the free valve is arranged above the fixed valve, and the scaling device is arranged between the free valve and the fixed valve; the well wall of the oil extraction device is provided with a plurality of oil outlets for injecting crude oil into the temporary storage device; the temporary storage device comprises a temporary storage pipe 11 and an electromagnetic valve 7 arranged on the temporary storage pipe and is used for temporarily storing the collected crude oil; the oil extraction device well wall is provided with a plurality of temporary storage devices, each temporary storage device is arranged at an oil outlet, and the temporary storage devices are arranged by the central control unit from bottom to top, wherein the first temporary storage device is arranged at the bottommost part of the well wall of the oil extraction device, the second temporary storage device is arranged above the first temporary storage device, and the rest is done in the same way;

when the scale removal device is used for removing scale on the well wall of the acquisition device, the central control unit controls the oil well pump to have the same pressure as the pressure in the well, the central control unit opens the first temporary storage device electromagnetic valve, crude oil in the scale removal device temporarily flows into the first temporary storage tube, the central control unit controls the oil well pump to pump oil and simultaneously drives the scale removal cutter to move upwards, the scale removal cutter removes scale on the well wall of the oil extraction device until the pressure above the scale removal cutter is higher than the lower pressure, the central control unit opens the second temporary storage device electromagnetic valve, crude oil in the scale removal device temporarily flows into the second temporary storage tube, the central control unit controls the oil well pump to pump oil and simultaneously drives the scale removal cutter to move upwards, the scale removal cutter removes scale on the well wall of the oil extraction device until the pressure above the scale removal cutter is higher than the lower pressure, and so on until the scale removal on the well wall is completed;

specifically, the embodiment of the invention comprises a stirring device 1, which is used for stirring a mixed material to form a lipopeptide-containing composite oil displacement agent, wherein the stirring device is provided with a first injection port, a second injection port and a third injection port, the first injection port is provided with a first electromagnetic valve 2 for controlling the injection amount of a weak base solution, the second injection port is provided with a second electromagnetic valve 3 for controlling the injection amount of a first composition, and the third injection port is provided with a third electromagnetic valve 4 for controlling the injection amount of a polymer; the stirring device is connected with the liquid injection pipe, the liquid injection pipe comprises a discharge pipe arranged at the bottom of the stirring device and used for discharging the composite oil displacement agent containing lipopeptide, and a delivery pump 5 is arranged on the discharge pipe and used for controlling the discharge amount of the composite oil displacement agent containing lipopeptide; annotate the liquid pipe and still include a plurality of notes liquid pipelines 8, annotate liquid pipeline filling opening and be connected with the delivery pump, the even distribution of liquid outlet in the oil recovery device wall of a well outside for realize the abundant displacement of reservoir oil to natural rock core, it is provided with governing valve 12 to annotate liquid pipeline liquid outlet department for adjust liquid outlet area.

The central control unit presets the viscosity W of the lipopeptide-containing composite oil-displacing agent, and compares the acquired viscosity M of the lipopeptide-containing composite oil-displacing agent with the preset viscosity to input an amount T20 of the first composition, an input amount T30 of the polymer and a driving speed P0 of the lipopeptide-containing composite oil-displacing agent, wherein,

when M is less than or equal to W1, the central control unit judges that the viscosity of the current lipopeptide-containing composite oil displacement agent does not meet the preset standard, the central control unit increases the input amount of the first composition from T20 to T21, increases the driving speed of the lipopeptide-containing composite oil displacement agent from P0 to P1, and sets P1= P0 x (1+ (W1-M)/W1);

when M is larger than or equal to W2, the central control unit judges that the viscosity of the current lipopeptide-containing composite oil-displacing agent does not meet the preset standard, the central control unit reduces the polymer input amount T20-T22, reduces the driving speed P0-P2 of the lipopeptide-containing composite oil-displacing agent, and sets P2= P0 x (1+ (M-W2)/W2);

When the viscosity M of the lipopeptide-containing composite oil-displacing agent obtained by the central control unit is less than or equal to the viscosity W1 of a first preset lipopeptide-containing composite oil-displacing agent, the central control unit adjusts the input amount of the first composition from T20 to T21 according to the difference between the real-time adhesion degree and the preset adhesion degree, and sets T21= T20^{(1+(W1-M)/W1)}When the viscosity M of the lipopeptide-containing composite oil-displacing agent obtained by the central control unit is greater than or equal to the viscosity W2 of a second preset lipopeptide-containing composite oil-displacing agent, the central control unit adjusts the input amount of the first composition from T20 to T22 according to the difference between the real-time adhesion degree and the preset adhesion degree, and sets T22= T20^(1-(M-W2)W2)。

The central control unit obtains the real-time driving speed of the compound oil-displacing agent containing lipopeptide, and adjusts the conveying pressure F0 of the conveying pump and the opening area D0 of the regulating valve according to the comparison between the real-time driving speed Pi and the driving speed P0 of the preset compound oil-displacing agent containing lipopeptide,

when Pi is more than or equal to P0, the central control unit is increasedThe delivery pump delivers pressures F0 to F1, setting F1= F0 × (1+ ((Pi-P0)/P0)²) The central control unit reduces the opening areas of the regulating valves D0-D1, and sets D1= D0 × (1- (Pi-P0)/P0);

when Pi < P0, the central control unit decreases the delivery pump delivery pressure F0 to F2, setting F2= F0 × (1- ((P0-Pi)/P0)²) The central control unit increases the regulating valve opening areas D0 to D2, and sets D2= D0 × (1+ (P0-Pi)/P0).

Specifically, the viscosity of the lipopeptide-containing composite oil-displacing agent is preset, and the input amount T20 of a first composition, the input amount T30 of a polymer and the driving speed P0 of the lipopeptide-containing composite oil-displacing agent are adjusted according to the obtained viscosity and the preset value, wherein the viscosity obtained by a central control unit is smaller than or equal to the first preset value, so that the viscosity of the lipopeptide-containing composite oil-displacing agent prepared in real time does not meet the preset standard; when the viscosity acquired by the central control unit is within the range of a first preset value and a second preset value, the central control unit judges that the viscosity of the current oil displacement agent meets a preset standard without adjusting various parameters; the central control unit obtains that the viscosity of the current oil-displacing agent is larger than or equal to a second preset value, the central control unit realizes that the viscosity of the oil-displacing agent prepared next time accords with the preset value by reducing the input amount of the polymer, and simultaneously reduces the driving speed of the composite oil-displacing agent containing lipopeptide so as to ensure the oil-displacing efficiency of the current time and the next time. The central control unit adjusts the conveying pressure of the conveying pump and the opening area of the regulating valve according to the improvement or reduction of the driving speed, specifically, when the driving speed acquired by the central control unit is greater than or equal to a preset standard value, the central control unit reduces the opening area of the regulating valve simultaneously by increasing the conveying pressure of the conveying pump to achieve the purpose of increasing the driving speed, and when the driving speed acquired by the central control unit is smaller than the preset standard value, the central control unit increases the opening area of the regulating valve simultaneously by reducing the conveying pressure of the conveying pump to achieve the purpose of reducing the driving speed.

The central control unit presets an in-oil scaling amount G, compares the in-oil scaling amount H obtained in single oil extraction with the preset in-oil scaling amount, adjusts the injection amount of weak base solution and removes the scaling on the well wall, wherein,

When the obtained in-oil fouling amount H obtained by the central control unit is within the range of the first preset in-oil fouling amount G1 and the second preset in-oil fouling amount G2, the central control unit reduces the weak base solution injection amount T10 to T11 according to the difference of the in-oil fouling amounts, and sets T11= T10 x (1- (H-G1) x (G2-H)/(G1 × G2)).

Specifically, the method comprises the steps of setting the in-oil scaling amount, comparing the obtained in-oil scaling amount with a preset value, adjusting the injection amount of a weak base solution and removing the scaling on the well wall, judging whether the material proportion of the oil displacement agent is matched and the driving speed is properly adjusted according to the in-oil scaling amount in single oil extraction by setting a first preset value, and further judging the oil displacement efficiency of the oil displacement agent, wherein when the obtained in-oil scaling amount is less than or equal to the first preset value, the parameters meet the preset standard; if the obtained in-oil scaling amount is within the range of the first preset value and the second preset value, the fact that the current scaling amount is slightly large and the content of weak base in the oil displacement agent is too large is indicated, the central control unit reduces the content of weak base solution according to the difference value of the real-time value of the in-oil scaling amount and the first preset value and the second preset value, the recovery ratio is further improved, if the real-time value of the in-oil scaling amount is larger than or equal to the second preset value, the fact that the current in-oil scaling is not only scaling in crude oil, but also scaling generated by a well wall is indicated, and the central control unit judges that the well wall scaling of the oil production device is removed.

The central control unit presets a plurality of well wall descaling areas, including a first descaling area, a second descaling area and an nth descaling area, the central control unit obtains the weight difference value of the initial weight mi0 when the scaling device removes the scaling of the well wall of the ith area and the weight mi1 after removing the scaling of the well wall of the ith area as the scaling quantity delta mi of the well wall of the ith area, sets delta mi = mi1-mi0, and adjusts the opening area of the injection pipe regulating valve of the ith area according to the comparison of the scaling quantity delta mi of the ith area and the preset weight difference value, wherein,

when the delta mi is less than or equal to K1, the opening area Di of the regulating valve of the liquid injection pipeline of the ith descaling area is increased to Di1 by the central control unit;

when the delta mi is larger than or equal to K2, the opening area Di of the regulating valve of the liquid injection pipeline of the ith descaling area is reduced to Di2 by the central control unit;

Specifically, the descaling area set by the embodiment of the invention is an area where the descaling knife is subjected to single descaling, and more specifically, the area where the descaling knife is subjected to single descaling is a distance of single displacement of the descaling device.

When the central control unit acquires that the scaling quantity delta mi of the ith area is less than or equal to a first preset scaling quantity K1, the central control unit increases the adjustment opening area Di to Di1 of the liquid injection pipeline of the ith area and sets Di1= Di x (1+ (K1-delta mi)/K1), and when the central control unit acquires that the scaling quantity delta mi of the ith area is greater than or equal to a second preset scaling quantity K2, the central control unit decreases the adjustment opening area Di to Di2 of the liquid injection pipeline of the ith area and sets Di2= Di x (1- (. delta mi-K2)/K2).

Specifically, the descaling device and the temporary storage device are arranged to remove scale on the well wall when the oil extraction device extracts oil, the well wall scaling amount is preset, and the opening area of the liquid injection pipeline regulating valve in each area is regulated by comparing the well wall scaling amount obtained by the central control unit with a preset value; if the well wall scaling amount is higher than the second preset value, the fact that the liquid injection amount of the liquid injection pipeline in the current area is too high is indicated, the scaling amount exceeds the preset standard, and the liquid injection amount needs to be reduced by reducing the opening area of the regulating valve, so that the scaling amount meets the preset standard.

The temporary storage device is arranged on the outer side of the well wall of the oil extraction device, comprises a temporary storage pipe and an electromagnetic valve mechanism, is arranged at an oil outlet of the well wall of the oil extraction device and is used for temporarily storing extracted oil, and is arranged on the temporary storage pipe and used for controlling the stored oil amount; the central control unit obtains the first borehole wall descaling 1 Delta mi of the i-th area, the second borehole wall descaling weight difference 2 Delta mi of the i-th area and the nth borehole wall descaling weight difference n Delta mi of the i-th area, the central control unit obtains the q-th borehole wall descaling weight difference q Delta mi of the i-th area and the (q-1) th borehole wall descaling weight difference (q-1) Delta mi of the i-th area as the scaling weight difference E of adjacent descaling times, and sets E = q Delta mi- (q-1) Delta mi, wherein q =1,2 to n,

Specifically, when the well wall scale is removed for the second time, the difference value of the obtained current area scale amount obtained by the central control unit and the obtained previous time when the well wall scale is removed is set as the scale weight difference of the adjacent descaling times, if the scale weight difference of the adjacent descaling times of the current area is smaller than or equal to a first preset value, the central control unit judges that the current descaling effect is poor, the temporary storage oil quantity of the temporary storage device needs to be increased, so that the descaling time of the descaling knife and the well wall is prolonged, and the descaling is more thorough; if the scaling weight difference of the adjacent descaling times of the current region is within the range of a first preset value and a second preset value, the current descaling effect is better, all parameters are not required to be adjusted, if the scaling weight difference of the adjacent descaling times of the current region is greater than or equal to the second preset value, the scaling amount generated by the well wall is too large, the application of the oil displacement agent is not in accordance with the preset standard, the central control unit reduces the conveying pressure of the conveying pump and simultaneously reduces the opening area of the regulating valve, the conveying amount of the oil displacement agent is reduced, and more scales are avoided.

The lipopeptide-containing composite oil displacement agent comprises 0.15-0.25 wt% of petroleum sulfonate, 1.1-2.2 wt% of polymer, 0.9-1.2 wt% of weak base, 0.15-0.25 wt% of lipopeptide and the balance of water.

The ratio of the petroleum sulfonate to the lipopeptide is 1:1, and the total concentration of the surfactant is 0.4%.

Specifically, the polymer in the embodiment of the invention is polyacrylamide with a molecular weight of 1600 ten thousand or 1900 ten thousand or 2500 ten thousand, wherein the weight percentage of the polyacrylamide with a molecular weight of 1600 ten thousand is 1.8-2.2%, the weight percentage of the polyacrylamide with a molecular weight of 1900 ten thousand is 1.4-1.8%, and the weight percentage of the polyacrylamide with a molecular weight of 2500 ten thousand is 1.1-1.4%.

Specifically, the viscosity of the lipopeptide-containing composite oil displacement agent system in the embodiment of the invention is 25 to 35 mPa.s.

Specifically, the ratio of petroleum sulfonate to lipopeptide according to the embodiment of the present invention is 1: 1.

specifically, the weak base in the embodiment of the invention is sodium carbonate, and the petroleum sulfonate is petroleum sodium sulfonate.

Example (b): the specific evaluation method of the lipopeptide-containing composite oil-displacing agent comprises the preferable method for compounding the lipopeptide-containing composite oil-displacing agent compound system and the research on the anti-adsorption property, the dilution property, the salt resistance and the hard water resistance of the system:

(1) different compounding proportions are preferred

The system formula is optimized by adjusting the concentration ratio and the compounding ratio of the lipopeptide/petroleum sulfonate weak base compounding system, and the concentration and the ratio of the optimal compounding surfactant are screened, referring to the table I.

Epi-lipopeptide-containing composite oil displacement agent

Fixing petroleum sulfonate/lipopeptide compound surfactant with certain total concentration, and detecting interfacial tension by using different proportions of petroleum sulfonate and lipopeptide biosurfactant.

Referring to fig. 3, which is a variation curve of interfacial tension of a petroleum sulfonate and lipopeptide complex system with different proportions according to an embodiment of the present invention, experimental data show that the interfacial tension of the complex system with two surfactants with different proportions is irregularly changed, but when the total concentration of the surfactants is 0.4% and the ratio of the petroleum sulfonate and the lipopeptide is 1:1, the interfacial tension of the system with 0.4% S (stone S: fat =1: 1) +1.2% Na2CO3+ P is the lowest. Therefore, the invention determines the compounding ratio and concentration of the two surfactants to be 0.4% S (stone S: tallow =1: 1).

(2) Different compounding ratios of anti-adsorption performance

After the components are compounded in different proportions, a comparative adsorption research experiment is carried out. Preparing petroleum sulfonate and lipopeptide weak base systems with different proportions by using 80-120 meshes of oil sand, mixing according to a water-sand ratio of 9:1, oscillating at a constant temperature of 45 ℃ for 24h, detecting the interfacial tension of the system after oil sand adsorption, pouring the supernatant into a new conical flask, weighing the supernatant, continuously adding natural oil sand according to the water-sand ratio of 9:1, oscillating at a constant temperature of 45 ℃ for 24h, detecting the interfacial tension of the system after oil sand adsorption, and repeating the steps until the interfacial tension of the compound system reaches more than 10-2 mN/m. The data of the adsorption experiment shows that the minimum concentration rule of the concentration of the petroleum sulfonate is more than 0.2 percent, and the adsorption performance can be ensured, see table two. And analyzing and determining the formula of the system through comprehensive analysis, cost consideration and the interface activity curve and the interface activity diagram in the above.

Adsorption research result of lipopeptide-containing compound oil displacement agent compounded in different proportions in table II

(3) Evaluation of anti-dilution performance of compound system

According to a formula determined in a screening process, 0.4% of S (S stone: S grease =1: 1) +1.2% of Na2CO3+ medium-split polymer (compared with a petroleum sulfonate system under the same condition) is prepared and diluted into different times by sewage, the interfacial tension of the diluted system is detected, and the anti-dilution performance of the petroleum sulfonate/lipopeptide compound weak base system is inspected.

Referring to fig. 4, it is shown as a curve of interfacial tension change of different dilution times of the compound system according to the embodiment of the present invention, and from the curve of the interfacial tension of the dilution times, the compound system is diluted 15 times, and the interfacial tension is still in the ultra-low interfacial tension range, which indicates that the compound system has better dilutability.

(4) Evaluation of salt resistance of compounded system

And adding 1000-8000 mg/L sodium chloride (compared with petroleum sulfonate system under the same condition) into the complex system, and detecting the viscosity and interfacial tension of the complex system.

Please refer to fig. 5, which is a curve of interfacial tension of the compound system according to the embodiment of the present invention along with the change of the sodium chloride concentration, and please refer to fig. 6, which is a curve of viscosity of the compound system according to the embodiment of the present invention along with the change of the sodium chloride concentration.

(5) Hard water resistance evaluation of compound system

Adding 10-50 mg/L calcium and magnesium ions (compared with a petroleum sulfonate system under the same condition) into the complex system, and detecting the viscosity and the interfacial tension of the complex system.

Please refer to fig. 7, which is a curve of interfacial tension of the compound system according to the embodiment of the present invention along with the change of the concentration of calcium and magnesium ions, and please refer to fig. 8, which is a curve of viscosity of the compound system according to the embodiment of the present invention along with the change of the concentration of calcium and magnesium ions.

So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.

Claims

1. The application method of the lipopeptide-containing composite oil displacement agent is characterized by comprising the following steps:

the detection pipe comprises a first detection pipeline and a second detection pipeline, one end of the first detection pipeline is connected with the discharge hole of the stirring chamber, the other end of the first detection pipeline is connected with the second detection pipeline, and an included angle formed by the first detection pipeline and the horizontal plane is larger than that formed by the second detection pipeline and the horizontal plane; the method comprises the following steps that a lipopeptide-containing composite oil-displacing agent is conveyed to a liquid injection pipe through a detection pipe, a central control unit obtains the moving distance of the current lipopeptide-containing composite oil-displacing agent in a second detection pipeline within a preset time through an image processing device, the height of the lipopeptide-containing composite oil-displacing agent staying at the joint of a first detection pipeline and the second detection pipeline is set as H, the central control unit obtains the viscosity of the current lipopeptide-containing composite oil-displacing agent, the viscosity of the lipopeptide-containing composite oil-displacing agent is M, and M = M × H/H0 × S/S0 is set, wherein H0 is the standard height of the lipopeptide-containing composite oil-displacing agent, S0 is the standard displacement of the lipopeptide-containing composite oil-displacing agent, and M is the standard viscosity of the lipopeptide-containing composite oil-displacing agent; when the viscosity of the lipopeptide-containing composite oil-displacing agent is lower than a preset standard, the central control unit increases the input amount of the first composition and increases the driving speed of the lipopeptide-containing composite oil-displacing agent; if the viscosity of the lipopeptide-containing composite oil-displacing agent is higher than a preset standard, the central control unit reduces the input amount of the polymer and the driving speed of the lipopeptide-containing composite oil-displacing agent;

2. The method of using a lipopeptide-containing complex oil-displacing agent according to claim 1, wherein the central control unit presets a viscosity W of the lipopeptide-containing complex oil-displacing agent, and the central control unit adds an amount T20 of the first composition, an amount T30 of the polymer and a driving speed P0 of the lipopeptide-containing complex oil-displacing agent according to the comparison between the viscosity M of the lipopeptide-containing complex oil-displacing agent and the presets,

3. The method for using the lipopeptide-containing composite oil-displacing agent according to claim 2, wherein when the viscosity M of the lipopeptide-containing composite oil-displacing agent obtained by the central control unit is less than or equal to the viscosity W1 of a first preset lipopeptide-containing composite oil-displacing agent, the central control unit adjusts the input amount of the first composition from T20 to T21 according to the difference between the real-time adhesion degree and the preset adhesion degree, and sets T21= T20^{(1+(W1-M)/W1)}When the viscosity M of the lipopeptide-containing composite oil-displacing agent obtained by the central control unit is greater than or equal to the viscosity W2 of a second preset lipopeptide-containing composite oil-displacing agent, the central control unit adjusts the input amount of the first composition from T20 to T22 according to the difference between the real-time adhesion degree and the preset adhesion degree, and sets T22= T20^(1-(M-W2)W2)。

4. The method for using the lipopeptide-containing composite oil-displacing agent according to claim 2, wherein the central control unit obtains the real-time driving speed of the lipopeptide-containing composite oil-displacing agent, and the central control unit adjusts the delivery pressure F0 and the opening area D0 of the regulating valve according to the real-time driving speed Pi compared with the driving speed P0 of the lipopeptide-containing composite oil-displacing agent,

when Pi ≧ P0, the central control unit increases the transfer pump transfer pressure F0 to F1, setting F1= F0 × (1+ ((Pi-P0)/P0)²) The central control unit reduces the opening areas of the regulating valves D0-D1, and sets D1= D0 × (1- (Pi-P0)/P0);

when Pi < P0, the central control unit reduces the delivery pump delivery pressures F0 to F2, setting F2=F0×（1-(（P0-Pi）/P0)²) The central control unit increases the regulating valve opening areas D0 to D2, and sets D2= D0 × (1+ (P0-Pi)/P0).

5. The method for using the lipopeptide-containing composite oil displacement agent according to claim 1, wherein the control unit presets an in-oil scaling amount G, compares the in-oil scaling amount H obtained in single oil recovery with the presets in-oil scaling amount, adjusts the injection amount of the weak base solution and removes the scaling on the well wall, wherein,

6. The method for using a lipopeptide-containing composite oil displacement agent according to claim 5, wherein when the amount of in-oil fouling obtained when the central control unit obtains a single oil recovery is between a first preset amount of in-oil fouling and a second preset amount of in-oil fouling G2, the central control unit reduces the weak base solution injection amount T10 to T11, set at T11= T10 × (1- (H-G1) × (G2-H)/(G1 × G2)).

7. The method for using the lipopeptide-containing composite oil displacement agent according to claim 1, wherein the central control unit presets a plurality of borehole wall scale removal areas, including a first scale removal area, a second scale removal area and an nth scale removal area, the central control unit obtains the weight difference between the initial weight mi0 when the scaling device removes the borehole wall scale in the i-th area and the weight mi1 after removing the borehole wall scale in the i-th area as the borehole wall scale removal amount Δ mi in the i-th area, and sets Δ mi = mi1-mi0, the central control unit adjusts the opening area of the injection pipe regulating valve in the i-th area according to the comparison between the scaling amount Δ mi in the i-th area and the preset weight difference, wherein,

8. The use method of the lipopeptide-containing composite oil displacement agent, according to claim 7, wherein a temporary storage device is arranged outside the well wall of the oil extraction device, the temporary storage device comprises a temporary storage tube arranged at an oil outlet of the well wall of the oil extraction device and used for temporarily storing the extracted oil, and the temporary storage device further comprises an electromagnetic valve mechanism arranged on the temporary storage tube and used for controlling the amount of the stored oil; the central control unit obtains the first borehole wall descaling 1 Delta mi of the i-th area, the second borehole wall descaling weight difference 2 Delta mi of the i-th area and the nth borehole wall descaling weight difference n Delta mi of the i-th area, the central control unit obtains the q-th borehole wall descaling weight difference q Delta mi of the i-th area and the (q-1) th borehole wall descaling weight difference (q-1) Delta mi of the i-th area as the scaling weight difference E of adjacent descaling times, and sets E = q Delta mi- (q-1) Delta mi, wherein q =1,2 to n,

when E is larger than or equal to L2, the central control unit judges that the descaling effect of the current area does not meet the preset standardQuasi, the central control unit reduces the delivery pump delivery pressure Fi to Fi1, sets Fi1= Fi x (1- (E-L2)/L2), reduces the regulator valve opening area Dir to Dir1, sets Dir1= Dir x (1- ((E-L2)/L2)²)；

9. The lipopeptide-containing composite oil-displacing agent according to any one of claims 1 to 8, which comprises 0.15% to 0.25% by weight of petroleum sulfonate, 1.1 to 2.2% by weight of polymer, 0.9% to 1.2% by weight of weak base, 0.15% to 0.25% by weight of lipopeptide, and the balance of water.

10. The lipopeptide-containing composite oil-displacing agent according to claim 9, wherein the ratio of petroleum sulfonate to lipopeptide is 1:1, and the surfactant concentration is 0.4%.