CN115680555A - Method, device, equipment and readable storage medium for determining dosage of temporary plugging agent - Google Patents
Method, device, equipment and readable storage medium for determining dosage of temporary plugging agent Download PDFInfo
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Abstract
The application provides a method, a device, equipment and a readable storage medium for determining the dosage of a temporary plugging agent. The method comprises the following steps: determining the balance time based on the first intra-fracture pressure and the first average sand ratio, wherein the first intra-fracture pressure refers to the pressure in the fractured fracture before the temporary plugging agent is added; determining a second average sand ratio based on a second intra-fracture pressure and the balance time, wherein the second intra-fracture pressure refers to the pressure in the fractured fracture after the temporary plugging agent is added; and determining the using amount of the temporary plugging agent based on the balance time, the construction displacement, the first average sand ratio and the second average sand ratio. The method obtains the needed temporary plugging agent dosage by calculating according to the acquired data, and realizes the accurate control of the temporary plugging agent dosage; the adaptation degree of the temporary plugging agent dosage obtained by calculation and the actual environment is improved.
Description
Technical Field
The application relates to the technical field of oil reservoir fracturing exploitation, in particular to a method, a device, equipment and a readable storage medium for determining the using amount of a temporary plugging agent.
Background
In the process of oil reservoir exploitation, the fracturing operation can enable a reservoir to generate cracks, improve the connectivity of the reservoir and an oil well and increase the oil yield. Repeated fracturing operations, however, can result in increased water content in the fractures, which can be detrimental to oil production. The temporary fracturing plugging technology can generate a certain temporary plugging pressure difference at two ends of the temporary plugging agent near the seam of the oil reservoir, so that a main seam is temporarily plugged, lateral fractures are opened, a complex seam network is formed, the reservoir transformation effect is improved, and the purpose of increasing the yield is achieved. The amount of the fracturing temporary plugging agent can influence the transformation effect of the reservoir.
In the related art, the temporary plugging agent dosage in the pressure temporary plugging construction is generally designed according to construction experience, or the temporary plugging agent dosage is simply calculated by using a formula. However, the results obtained by the empirical control and simple formula calculation methods have certain contingency and specificity, the obtained data is single, the solidification and the accuracy are poor, and the adaptability to the actual mining environment is poor.
Disclosure of Invention
The application provides a method, a device, equipment and a readable storage medium for determining the using amount of a temporary plugging agent, so that the using amount of the temporary plugging agent can be accurately determined.
In one aspect, a method for determining the amount of a transient blocking agent is provided, the method comprising:
determining the balance time according to the first fracture internal pressure and the first average sand ratio, wherein the first fracture internal pressure refers to the pressure in the fractured fracture before the temporary plugging agent is added;
determining a second average sand ratio according to the second fracture internal pressure and the balance time, wherein the second fracture internal pressure refers to the pressure in the fractured fracture after the temporary plugging agent is added;
and determining the using amount of the temporary plugging agent based on the construction displacement, the balance time, the first average sand ratio and the second average sand ratio.
In one possible implementation, determining the equilibration time based on the pressure in the first slot and the first average sand ratio comprises: determining a first equilibrium height based on the first intra-seam pressure; an equilibrium time is determined based on the first equilibrium height and the first average sand ratio.
In one possible implementation, determining a first balance height based on the first intra-seam pressure includes: determining a first particle sedimentation equilibrium resistance velocity based on the relationship between the intra-seam pressure and the particle sedimentation equilibrium resistance velocity and the first intra-seam pressure; determining a first equilibrium flow rate based on the relationship between the particle sedimentation equilibrium resistance velocity and the equilibrium flow rate and the first particle sedimentation equilibrium resistance velocity; based on the first equilibrium flow rate, a first equilibrium height is determined.
In one possible implementation, determining a first balance height based on the first balance flow rate includes: determining a first balance time flow section height under the first balance flow speed based on the first balance flow speed and the construction displacement; and determining the first balance height based on the height of the flow section at the first balance and the height of the fracture of the fracturing fracture.
In one possible implementation, before determining the second average sand ratio based on the pressure in the second slot and the equilibration time, the method further comprises: determining an expected additional pressure after adding the temporary plugging agent; the sum of the expected additional pressure and the pressure in the first slit is taken as the second slit pressure.
In one possible implementation, before determining the equilibrium time based on the first pressure in the first fracture and the first average sand ratio, the method further comprises:
and acquiring fracturing fracture form parameters and fracturing construction parameters of the target well before adding the temporary plugging agent based on the geological data of the single well of the target well and the production dynamic data of the adjacent wells, wherein the fracturing fracture form parameters comprise the height of a fracturing fracture, and the fracturing construction parameters comprise a first fracture internal pressure and a first average sand ratio.
In one possible implementation, determining the usage amount of the temporary plugging agent based on the construction displacement, the balance time, the first average sand ratio and the second average sand ratio includes:
taking the difference between the second average sand ratio and the first average sand ratio as the increment of the average sand ratio; determining the volume of the temporary plugging agent based on the construction displacement, the balance time and the increment of the average sand ratio; and determining the dosage of the temporary plugging agent based on the volume and the density of the temporary plugging agent.
In another aspect, there is provided an apparatus for determining the amount of a transient plugging agent, the apparatus comprising:
the first determination module is used for determining the balance time according to the pressure in the first fracture and the first average sand ratio, wherein the pressure in the first fracture refers to the pressure in the fractured fracture before the temporary plugging agent is added;
the second determination module is used for determining a second average sand ratio according to a second intra-fracture pressure and the balance time, wherein the second intra-fracture pressure refers to the pressure in the fractured fracture after the temporary plugging agent is added;
and the third determination module is used for determining the using amount of the temporary plugging agent based on the construction displacement, the balance time, the first average sand ratio and the second average sand ratio.
In one possible implementation, the first determining module is configured to determine a first equilibrium height based on a pressure within the first seam; an equilibration time is determined based on the first equilibration height and the first average sand ratio.
In one possible implementation, the first determining module is configured to determine a first particle sedimentation equilibrium resistance velocity based on a relationship between the intra-seam pressure and the particle sedimentation equilibrium resistance velocity and the first intra-seam pressure; determining a first equilibrium flow rate based on the relationship between the particle sedimentation equilibrium resistance velocity and the equilibrium flow rate and the first particle sedimentation equilibrium resistance velocity; based on the first equilibrium flow rate, a first equilibrium height is determined.
In a possible implementation manner, the first determining module is used for determining a first balanced flow section height at a first balanced flow speed based on the first balanced flow speed and construction displacement; and determining the first balance height based on the height of the flow section at the first balance and the height of the fracture of the fracturing fracture.
In one possible implementation, the apparatus further includes: an additional module for determining an expected additional pressure after adding the temporary plugging agent; the sum of the expected additional pressure and the pressure in the first slit is taken as the second slit pressure.
In one possible implementation, the apparatus further includes: the acquisition module is used for acquiring fracturing fracture form parameters and fracturing construction parameters of the target well before the temporary plugging agent is added based on single-well geological data of the target well and production dynamic data of adjacent wells, wherein the fracturing fracture form parameters comprise fracture height of fracturing fractures, and the fracturing construction parameters comprise first fracture internal pressure and first average sand ratio.
In one possible implementation, the third determining module is configured to use a difference between the second average sand ratio and the first average sand ratio as an increment of the average sand ratio; determining the volume of the temporary plugging agent based on the construction displacement, the balance time and the increment of the average sand ratio; and determining the dosage of the temporary plugging agent based on the volume and the density of the temporary plugging agent.
In another aspect, a computer device is provided, which comprises a processor and a memory, wherein at least one program code is stored in the memory, and the program code is loaded by the processor and executed to cause the computer device to implement any of the above methods for determining the usage amount of the temporary plugging agent.
In another aspect, a computer readable storage medium is provided, in which at least one program code is stored, the program code being loaded and executed by a processor to make a computer implement any of the above methods for determining the usage amount of the temporary plugging agent.
In another aspect, a computer program or a computer program product is provided, in which at least one computer instruction is stored, and the at least one computer instruction is loaded and executed by a processor, so as to enable a computer to implement any one of the above methods for determining the usage amount of the transient blocking agent.
According to the technical scheme for determining the temporary plugging agent using amount, the temporary plugging agent using amount is determined by accurately calculating based on the acquired data, and authenticity and accuracy of the temporary plugging agent using amount can be guaranteed.
Drawings
FIG. 1 is a schematic illustration of an implementation environment provided by an embodiment of the present application;
FIG. 2 is a flow chart of a method for determining the amount of a temporary plugging agent according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of an apparatus for determining the amount of a temporary plugging agent according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a computer device according to an embodiment of the present application.
Detailed Description
Unless otherwise defined, all technical terms used in the examples of the present application have the same meaning as commonly understood by one of ordinary skill in the art, and are used for explanation only of the examples of the present application, and are not intended to limit the present application.
In the process of oilfield development, pressure operation is an important operation for generating cracks in a reservoir and improving the connectivity between the reservoir and an oil well. The related fracturing temporary plugging technology is to inject a temporary plugging agent into a reservoir stratum to temporarily plug a main seam and open a lateral fracture to form a complex seam network, so that the reservoir stratum transformation effect is improved. However, the amount of the temporary plugging agent is large or small, which affects the fracturing effect, and the method for determining the amount of the temporary plugging agent according to experience in the related art causes inaccurate amount in construction and interferes with exploitation of an oil field, so that a method for accurately determining the amount of the temporary plugging agent before temporary plugging operation is needed.
Referring to fig. 1, an implementation environment of the embodiment of the present application includes at least one terminal 101 and a server 102, and the method is executed on the terminal 101 or the server 102, respectively. The terminal 101 and the server 102 may be communicatively coupled to enable interactive transmission of information. The terminal 101 and the server 102 perform calculation by acquiring the parameter data to determine the usage amount of the temporary plugging agent.
The terminal 101 may be any electronic product capable of performing human-Computer interaction with a user through one or more modes such as a keyboard, a touch pad, a touch screen, and voice interaction, for example, a PC (Personal Computer), a PPC (Pocket Personal Computer), a tablet Computer, and the like.
The server 102 may be one server, may also be a server cluster composed of a plurality of servers, and may also be a cloud server that provides basic cloud computing services such as a cloud service, a cloud database, cloud computing, a cloud function, cloud storage, a Network service, cloud communication, a middleware service, a domain name service, a security service, a CDN (Content Delivery Network), and a big data and artificial intelligence platform.
The embodiment of the application provides a method for determining the using amount of a temporary plugging agent, which is used for acquiring parameter data of a target well for temporary plugging operation based on the actual condition of an oil well on a mining site and determining the using amount of the temporary plugging agent of the target well by combining a related formula. The adaptation degree and the accuracy of the temporary plugging agent dosage and the actual development condition are ensured, and a better reservoir development effect is obtained. The method provided by the embodiment of the application includes, but is not limited to, the following steps 201 to 203.
201. And determining the balance time according to the pressure in the first fracture and the first average sand ratio, wherein the pressure in the first fracture refers to the pressure in the fractured fracture before the temporary plugging agent is added.
The equilibrium time refers to the time required for the sand bank to reach a first equilibrium height at the pressure in the first slot and the first average sand ratio. During the development of the target well, the fracture is in equilibrium at the current pressure when the sand bank reaches equilibrium height. In this step, it is necessary to determine a first equilibrium height based on the pressure in the first gap, then determine an equilibrium time based on the first equilibrium height and the first average sand ratio. In one possible implementation, prior to this step 201, the fracture length, fracture height, and mixed liquor density of the fracture need to be determined.
Wherein the mixed solution refers to a mixture of fracturing fluid and sand; the average sand ratio, which is the ratio of the volume of sand in the sand fluid mixture (i.e., the mixed liquor) to the volume of the fracturing fluid, represents the sand loading concentration. In practical applications, the types of the fracturing fluid and the sand are determined based on the current implementation environment, and the application does not limit the types of the fracturing fluid, and the fracturing fluid may be gel fracturing fluid, guar gum, or the like, and the sand may be quartz sand, for example.
The determination process of the first balance height comprises the following steps: determining a first particle sedimentation equilibrium resistance velocity based on the relationship between the intra-seam pressure and the particle sedimentation equilibrium resistance velocity and the first intra-seam pressure; determining a first equilibrium flow rate based on the relationship between the particle sedimentation equilibrium resistance velocity and the equilibrium flow rate and the first particle sedimentation equilibrium resistance velocity; based on the first equilibrium flow rate, a first equilibrium height is determined. Illustratively, this first balance height determination process includes, but is not limited to, the following steps 2011-2013.
And 2011, acquiring a first fracture internal pressure of a fracture in the target well in a balanced state, and substituting the numerical value of the first fracture internal pressure into a formula 1 to obtain a first particle sedimentation balance resistance speed.
Equation 1 shows the relationship between the pressure in the gap and the velocity of the particle settling equilibrium resistance. Wherein, P means the pressure in the gap, unit MPa; u refers to the particle sedimentation equilibrium resistance speed in m/s; l refers to the length of the fracture in m; rho dc Means the sand-liquid mixing density (density of mixed liquid), unit g/cm 3 The sand-liquid mixture refers to a mixture of sand and fracturing fluid; w refers to the fracture width of the fracture in m.
Based on formula 1, pressure P in the first seam is obtained 1 On the basis of the pressure P in the first gap 1 Substituting the numerical value of (A) and the numerical values of other required parameter data into a formula 1, and calculating to obtain a first particle sedimentation balance resistance speed U 1 . Wherein other parameter data, such as fracture width and length of the fractured fracture, can be obtained by fracture analysis software before step 201,the mixed liquor density can be determined by calculation.
And 2012, substituting the first particle sedimentation equilibrium resistance speed into a formula 2 to calculate and obtain a first equilibrium flow rate.
Equation 2 shows the relationship between the equilibrium resistance velocity of particle settling and the equilibrium flow velocity. Wherein V is the equilibrium flow rate in m/s; mu means the viscosity of the fracturing fluid in mPa · s; u, W and ρ sc The meaning is the same as that in formula 1, and the average resistance speed of particle sedimentation, the fracture width of a fracturing fracture and the sand-liquid mixing density are sequentially referred to.
In this step, U calculated in 2011 is added 1 Substituting into formula 2, and calculating to obtain a first balance flow velocity V in combination with the values of other corresponding data in the formula 1 . Wherein the value of the other data is determined before step 201.
And 2013, substituting the first balance flow rate into a formula 3, and calculating to obtain a first balance height.
In this step, the process of determining the first equilibrium height based on the first equilibrium flow rate includes: determining a first balance-time flow section height under a first balance flow speed based on the first balance flow speed and construction displacement; and determining the first balance height based on the flow section height at the first balance and the fracture height of the fracturing fracture.
Equation 3 represents the relationship between the equilibrium flow rate and the equilibrium height. In the formula, H refers to the balance height of the sand bank in a balanced state, and is a unit m; h 0 The height of a fractured crack is expressed as m; h refers to the height of the flow cross section in the equilibrium, unit m; q denotes construction displacement, unit m 3 Min, V means the equilibrium flow rate, unit m/s. Based on the formula 3, the height h of the flow section in balance is based on the construction displacement, the height of the fracture andthe equilibrium flow rate is calculated.
In the exemplary embodiment, based on the mathematical calculation rules and the form of equation 3, a first equilibrium flow rate V is first obtained from the construction displacement Q, the slot width W, and 2012 1 Calculating to obtain the height h of a first balance flow section at a first balance flow speed 1 Then calculate H 0 And h 1 The difference of (a) yields a first equilibrium height.
After determining the first balance height, the process of determining the balance time includes, but is not limited to, the following steps 2014 and 2015 based on the obtained first balance height and the first average sand ratio.
Step 2014, substituting the relationship between the coefficient K and the average sand ratio S and the balance height H, which are shown in formula 4, into the numerical value of the corresponding parameter data to calculate to obtain a first coefficient K 1 The value of (d);
in the formula, K is a coefficient, S refers to an average sand ratio, and a decimal form is applied in the calculation process; u shape P The particle sedimentation is uniform and unit m/s; rho means the fracturing fluid density in kg/m 3 V is the equilibrium flow rate, and the unit m/s, H and H are the same as in equation 3.
In this step, the V calculated in the above-described steps 2011-2013 is used 1 、h 1 、H 1 And the obtained first average sand ratio S 1 Substituting the formula 4 to calculate a first coefficient K 1 。
And 2015, substituting the relation between the time t for the sand bank to reach the equilibrium height, the equilibrium height H and the coefficient K, which are shown in formula 5, into the numerical value of the corresponding parameter data, and calculating to obtain first equilibrium time.
Formula 5 realizes the calculation of the time required for the sand bank to reach the equilibrium height by representing the relationship between the time and the equilibrium height, the construction displacement and the coefficient K.
In this step, K calculated in the above-described steps 2011 to 2014 is added 1 、H 1 、h 1 The data of W and Q and the numerical value of (3) are substituted into the formula 5, and the numerical value of the equilibrium time can be calculated. In one possible implementation, the equilibrium height is assumed to have been reached assuming that the sand bank has reached 95% of the equilibrium height. Where the W and Q point values may be obtained prior to step 201.
The above steps are applied to parameters such as the pressure in the first seam, the first average sand ratio and the like, and the parameters are obtained before the step 201 is executed, and the obtaining manner is various, and is not limited in the embodiment of the present application. Based on the contents of the formulas 1 to 5 applied in the calculation process, it can be known that in the calculation process based on the formulas, other parameter data such as the fracture height, the fracture width, the construction displacement and the like of the fracture are also applied, and the acquisition mode of the other parameter data is not limited in the embodiment of the present application.
202. And determining a second average sand ratio according to the pressure in the second fracture and the balance time, wherein the pressure in the second fracture refers to the pressure in the fractured fracture after the temporary plugging agent is added.
The method of determining the pressure within the second seam comprises: determining an expected additional pressure after adding the temporary plugging agent; the sum of the expected additional pressure and the pressure in the first slit is taken as the second slit pressure. The preset additional pressure is the increment of the pressure in the fracturing fracture after the temporary plugging agent is added, the preset additional pressure is set according to the actual exploitation situation, and the size and the setting mode of the additional pressure are not limited. The second average sand ratio refers to an average sand ratio corresponding to a second equilibrium height reached within the equilibrium time at the second intra-seam pressure, the second equilibrium height being determined based on the second intra-seam pressure.
The process of determining the second average sand ratio in this step includes: determining a second equilibrium height based on the second intra-seam pressure; a second average sand ratio is determined based on the second equilibrium height and the above-mentioned equilibrium time. Illustratively, the method for determining the second equilibrium height is similar to the method for determining the first equilibrium height, and the second equilibrium height is calculated and determined based on the pressure in the second slit and the equations 1-3, which is not described in detail herein.
Determining the second average sand ratio based on the second equilibrium height and the equilibrium time includes: substituting the balance time and the value of the second average sand ratio into formula 5 based on the relationship between the time for the sand levee to reach the balance height, the balance height and the coefficient shown in formula 5 to obtain the value of the second coefficient at the moment; and (3) substituting the numerical value of the coefficient and the second balance height at the moment based on the relation among the coefficient, the average sand ratio and the balance height shown in the formula 4, and calculating to obtain the corresponding second balance sand ratio after the temporary plugging agent is added.
203. And determining the using amount of the temporary plugging agent based on the construction displacement, the balance time, the first average sand ratio and the second average sand ratio.
In this step, determining the amount of the temporary plugging agent comprises: taking the difference between the second average sand ratio and the first average sand ratio as the increment of the average sand ratio; determining the volume of the temporary plugging agent based on the construction displacement, the balance time and the increment of the average sand ratio; and determining the using amount of the temporary plugging agent based on the volume of the temporary plugging agent and the density of the temporary plugging agent. This process can be implemented according to equations 6 and 7.
X＝Qt(S 2 -S 1 ) (formula 6)
M＝ρ Z X (formula 7)
Formulas 6 and 7 are respectively formulas for calculating the volume and the dosage of the temporary plugging agent, wherein S is 1 、S 2 Respectively indicates a first average sand ratio before adding the temporary plugging agent and a corresponding second average sand ratio after adding the temporary plugging agent, S 1 、S 2 The calculations are performed in decimal form in equations 6 and 7. Q is the above construction displacement, ρ Z The density of the temporary plugging agent is in unit of kg/m 3 。
In this step, the temporary plugging agent usage amount can be calculated by substituting the parameter data obtained in steps 201 and 202 into equations 6 and 7 in order. Wherein, the dosage of the temporary plugging agent can refer to the quality of the temporary plugging agent to be applied.
Before step 201 is executed, it is necessary to acquire each parameter data applied in steps 201-203, and the method of acquiring the parameter data is as follows: and acquiring the fracturing crack form parameters and the fracturing construction parameters of the target well before adding the temporary plugging agent based on the geological data of the single well of the target well and the production dynamic data of the adjacent wells.
In the step, a production well needing fracturing and temporary plugging operation is determined as a target well, and single-well geological data of the target well and production dynamic data of adjacent wells of the target well are obtained; and determining the fracture morphology parameters and the fracture construction parameters before adding the temporary plugging agent by combining fracture analysis software based on the single-well geological data of the target well and the production dynamic data of the adjacent well. The shape parameters of the fracturing crack before the temporary plugging agent is added comprise the length, the height and the width of the fracturing crack before the temporary plugging agent is added; the fracturing construction parameters comprise the pressure in the first crack, the first average sand ratio, the construction discharge capacity, the density of each liquid required to be injected into the reservoir during construction, the density of mixed liquid, the viscosity of the liquid and the like. For example, the density of the fracturing fluid, the density of sand, the sand ratio and the porosity of the sand can be respectively obtained, and then the mixed density of the sand and the fluid can be calculated.
The fracturing fracture morphological parameters and the fracturing construction parameters before the temporary plugging agent is added are both applied to the calculation process for determining the using amount of the temporary plugging agent. The method for acquiring the single-well geological logging information of the target well and the production dynamic information of the adjacent wells and the type of applied fracturing analysis software are not limited in the application; for example, geological survey and data monitoring during production can be performed by professional logging equipment, so that data fed back during production can be acquired in real time.
In one possible implementation mode, the length L and the height H of the fracture are obtained 0 The seam width W; obtaining the pressure P in the first gap 1 I.e., the pressure in the fracture before the addition of the temporary plugging agent. In a possible implementation mode, the technical scheme can be applied to a development field to directly acquire real-time monitoring data in a target well. Illustratively, the net pressure P in the fracture is taken to be at equilibrium 1 As a first intra-seam pressure; obtaining sand liquid mixed density rho sc (ii) a Obtaining the viscosity mu of the liquid; obtaining a first average sand ratio S before adding the temporary plugging agent 1 . Wherein, the density of the sand-liquid mixture refers to the mixing of sand and fracturing fluidThe mixture obtained thereafter.
The embodiment of the application provides a method for determining the using amount of a pressure temporary plugging agent, which comprises the steps of obtaining fracturing construction parameters and fracturing crack form parameters before adding the temporary plugging agent, and realizing the calculation of the using amount of the temporary plugging agent under the condition of obtaining construction discharge capacity by calculating the increment of average sand ratio when the pressure in a fracturing crack reaches the pressure in a second crack in balance time. The method can ensure the accuracy of the determined dosage of the temporary plugging agent through accurate calculation; the method can be applied to various temporary plugging agents, and has wide application range; in addition, the parameter data used for calculation is real data of a mining field, and the amount of the fracturing agent in the construction process can be calculated in real time. The matching degree of the temporary plugging agent dosage and the actual condition is ensured, and data can be acquired in real time to realize real-time adjustment of the construction scheme.
To more clearly illustrate the method for determining the amount of the temporary plugging agent provided in the embodiments of the present application, the method for determining the amount of the temporary plugging agent provided in the embodiments of the present application will be described below with reference to the exemplary embodiment, which uses a low-permeability tight sandstone reservoir oil well in a certain production area as a target well and determines the amount of the temporary plugging agent in the fracturing process of the target well. In the exemplary embodiment, the well is fractured using 31/2 tubing feed and the amount of bridging agent is determined by procedures including, but not limited to, the following steps 1-4.
Step 1, obtaining fracturing fracture morphological parameters and fracturing construction parameters before temporary plugging based on single well geological data and adjacent well production dynamic data of a target well.
In the mining process, the well spacing between a plurality of mining wells in the same mining area is small, so that the related data of the adjacent wells of the mining well has certain reference value in the process of acquiring the data of the target well. In the step, geological data of a production well which is currently subjected to fracturing temporary plugging operation and dynamic production data of an adjacent well of the production well are obtained, simulation calculation is carried out by combining fracturing analysis software, and fracturing fracture parameters and fracturing construction parameters before the temporary plugging agent is added are obtained.
In the exemplary embodiment, multiple fractures are created during the fracturing process, and the fractures are appliedAnd (3) determining the simulation equivalent sub-network of the actual seam network by analysis software, and then determining simulation equivalent parameters. The fracture morphology parameters determined in step 1 before adding the temporary plugging agent include: the length L =90m of the simulated equivalent seam net seam of the fracturing fracture, and the height H of the simulated equivalent seam net seam 0 =30m, and the simulated equivalent slot-net slot width W =6cm.
The fracturing construction parameters determined in this step include: total construction displacement Q Z ＝6m 3 Min, the discharge capacity of the single side seam is Q D ＝3m 3 The net pressure in the crack (the pressure in the first crack) is 3MPa, the viscosity of the liquid is mu =50mPa · s, and the density rho =1g/cm of the fracturing liquid 3 Density of sand rho s ＝2.65g/cm 3 Density of temporary plugging agent ρ z ＝1.2g/cm 3 Density of mixed liquor (sand-liquid mixed density) ρ sc ＝1076g/cm 3 First sand ratio S before adding temporary plugging agent 1 ＝8％。
In the exemplary embodiment, the process of adding mixed liquor and fracturing fluid is based on double-sided seams, and therefore, the total construction displacement and the construction displacement of single-sided seams are determined. The mixed liquor is a mixture of fracturing fluid and sand, and in the exemplary embodiment, the density of the mixed liquor is determined based on the density of the fracturing fluid, the density of the sand, the sand ratio of the sand, and the porosity of the reservoir.
Illustratively, the mixed liquor density is calculated by the following method:
wherein, the first and the second end of the pipe are connected with each other,
the porosity of the sand is shown, and in the embodiment of the application, the porosity value is 40%.1000 represents the approximate weight per cubic meter of fracturing fluid (kg) and 2650 is the density of the sand grains (kg/m 3).
And 2, determining the balance time based on the pressure in the first gap and the first average sand ratio.
Selecting the first intra-seam pressure P required by the step from the parameter data obtained in the step 1 1 =3MPa, and the simulated equivalent seam length L =90mSimulating equivalent seam net seam height H 0 =30m, simulated equivalent gap width W =6cm, mixed liquid density rho sc ＝1076g/cm 3 Liquid viscosity mu =50mPa · s, single slit displacement Q =3m 3 /min。
The equilibrium time is the time required for the sand bank to reach equilibrium height, which in this step is the time required for the sand bank to reach the first equilibrium height under the pressure in the first slot. The process of calculating the equilibration time based on the selected parameter data includes, but is not limited to, steps 2-1 through 2-4.
Step 2-1, according to formula 1:
selecting a first pressure P in the gap 1 Simulating equivalent seam net seam length L, simulating equivalent seam net seam width W and mixed liquid density rho sc Substituting the numerical value into the corresponding position in the formula 1 to obtain the formula:
further calculating to obtain the first particle sedimentation balance resistance speed U 1 ＝0.96m/s。
Step 2-2, according to a formula 2, calculating the obtained first particle sedimentation equilibrium resistance velocity U 1 Width of gap W, density of mixed liquid rho sc Substituting the value of the liquid viscosity mu into the corresponding position of the formula 2, and calculating to obtain a first balance flow velocity V 1 The numerical value of (A):
step 2-3, selecting construction displacement Q and seam height H according to formula 3 0 And the calculated first equilibrium flow velocity V 1 The numerical value of (a) is substituted for the corresponding position, and the height h of the flow section in balance under the first balance flow speed is calculated and obtained 1 =4.17m, first balance height H reached by sand bank 1 25.83 the calculation process is as follows:
step 2-4, selecting a first average sand ratio S according to a formula 4 1 Density rho of fracturing fluid and density rho of mixed solution sc Particle settling uniform speed U P And the first balance height H obtained by calculation 1 Substituting the value of (A) into the corresponding position in equation 5, where U P The value is 0.17m/s, and K is obtained by calculation 1 =0.313; and substituting the numerical value of the relevant parameter data according to the formula 5 to calculate the corresponding balance time t =9.84min.
And 3, determining a second average sand ratio based on the pressure in the second gap and the balance time.
After the temporary plugging agent is added, the pressure in the seam in the reservoir can be changed, and a second pressure in the seam is obtained. In the present exemplary embodiment, an additional pressure Δ P =2MPa is set, and the pressure in the second slit is P 2 ＝P 1 +ΔP＝5MPa。
In the step, before the second average sand ratio is determined, a second balance height is determined based on the pressure in the second gap, then the second average sand ratio is determined based on the second balance height and the balance time, and the substeps of determining the second average sand ratio in the step are step 3-1 and step 3-2.
And 3-1, determining a second balance height based on the pressure in the second gap.
In the embodiment of the present application, the method for determining the second equilibrium height is the same as the method for determining the first equilibrium height in step 2. Substituting the related data into the corresponding position according to the formula 1 to calculate the second particle sedimentation equilibrium resistance velocity U 2 =1.24m/s, and then the second equilibrium flow velocity V is obtained based on equation 2 2 =0.33m/s; respectively obtaining the firstSecond equilibrium flow profile height h at a second equilibrium flow velocity 2 =2.49m, second balance height H 2 =27.51m. The detailed description of the calculation process is omitted here.
Step 3-2, according to the formula 5, balancing time t and the height h of the flow section at the second balance time under the second balance flow speed 2 Second balance height H 2 Gap width W and second equilibrium flow velocity V 2 Substituting the value of (b) into the corresponding position to determine K under the pressure in the second slit 2 The numerical value of (c). Coefficient K expressed according to equation 4 2 And the average sand ratio S, substituting the coefficient K 2 Density rho of fracturing fluid and density rho of mixed liquid sc Particle settling uniform speed U P And a calculated second equilibrium height H 2 Determining a second equilibrium sand ratio.
Then, in the case that the equilibrium time t =9.84min, the second average sand ratio S is obtained according to the formulas 4 and 5 2 ＝9％。
And 4, determining the using amount of the temporary plugging agent based on the construction displacement, the balance time, the first average sand ratio and the second average sand ratio.
In the step, the numerical values of the first average sand ratio and the construction displacement obtained in the step 1 and the numerical values of the balance time and the second average sand ratio obtained by calculation in the steps 2 and 3 are substituted into a formula 6, and the product of the construction displacement, the balance time and the increment of the average sand ratio is calculated to obtain the volume of the temporary plugging agent. And (3) performing product operation on the volume of the temporary plugging agent and the density of the temporary plugging agent to obtain the using amount of the temporary plugging agent, which is also called as the mass of the temporary plugging agent.
In the step 4, the density of the temporary plugging agent is 1200kg/m 3 The calculation process in the step 4 is as follows:
calculating the volume of the temporary plugging agent based on equation 6: x = Qt (S) 2 -S 1 )＝3×9.84×0.01＝0.2952m 3 (ii) a Calculating the dosage of the temporary plugging agent based on formula 7: m = ρ Z X＝0.2852×1200＝354.24kg。
In one possible implementation manner, the formulas 6 and 7 are combined to perform comprehensive calculation, that is, the dosage of the temporary plugging agent is M = Qt (S) 2 -S 1 )ρ Z ＝3×9.84*0.01*1200＝354.24kg。
In this exemplary embodiment, when M determined at this time indicates the amount of the temporary plugging agent for one-sided stitches, the total amount of the temporary plugging agent is M Z ＝354×2＝708.48kg。
The method for determining the usage amount of the temporary plugging agent provided by the exemplary embodiment can ensure the accuracy of the determined usage amount of the temporary plugging agent through accurate calculation; the method is suitable for application of various temporary plugging agents, and has a wide application range; in addition, the parameter data used for calculation are real data of an exploitation field, and the using amount of the fracturing agent in the construction process can be calculated in real time. The matching degree of the temporary plugging agent dosage and the actual condition is ensured, and data can be acquired in real time to realize real-time adjustment of the construction scheme.
The embodiment of the present application further provides a device for determining the dosage of the temporary plugging agent, referring to fig. 3, the device includes:
the first determining module 301 is configured to determine the balance time according to a first intra-fracture pressure and a first average sand ratio, where the first intra-fracture pressure refers to a pressure in a fractured fracture before the temporary plugging agent is added;
a second determining module 302, configured to determine a second average sand ratio according to a second intra-fracture pressure and a balance time, where the second intra-fracture pressure refers to a pressure in the fractured fracture after the temporary plugging agent is added;
and a third determining module 303, configured to determine the usage amount of the temporary plugging agent based on the construction displacement, the balance time, the first average sand ratio, and the second average sand ratio.
In one possible implementation, the first determining module 301 is configured to determine a first balance height based on a pressure inside the first slit; an equilibration time is determined based on the first equilibration height and the first average sand ratio.
In one possible implementation, the first determining module 301 is configured to determine a first particle sedimentation equilibrium resistance velocity based on a relationship between the intra-seam pressure and the particle sedimentation equilibrium resistance velocity and the first intra-seam pressure; determining a first equilibrium flow rate based on the relationship between the particle sedimentation equilibrium resistance velocity and the equilibrium flow rate and the first particle sedimentation equilibrium resistance velocity; based on the first equilibrium flow rate, a first equilibrium height is determined.
In a possible implementation manner, the first determining module 301 is configured to determine a first balanced flow section height at a first balanced flow rate based on the first balanced flow rate and the construction displacement; and determining the first balance height based on the flow section height at the first balance and the fracture height of the fracturing fracture.
In one possible implementation, the apparatus further includes: an additional module for determining an expected additional pressure after adding the temporary plugging agent; the sum of the expected additional pressure and the pressure in the first slit is taken as the second slit pressure.
In one possible implementation, the apparatus further includes: the acquisition module is used for acquiring fracturing fracture form parameters and fracturing construction parameters of the target well before the temporary plugging agent is added based on single-well geological data of the target well and production dynamic data of adjacent wells, wherein the fracturing fracture form parameters comprise fracture height of fracturing fractures, and the fracturing construction parameters comprise first fracture internal pressure and first average sand ratio.
In a possible implementation manner, the third determining module 303 is configured to use a difference value between the second average sand ratio and the first average sand ratio as an increment of the average sand ratio; determining the volume of the temporary plugging agent based on the construction displacement, the balance time and the increment of the average sand ratio; and determining the dosage of the temporary plugging agent based on the volume and the density of the temporary plugging agent.
In the apparatus provided in fig. 3, when the functions of the apparatus are implemented, only the division of the functional modules is illustrated, and in practical applications, the functions may be distributed by different functional modules as needed, that is, the internal structure of the device may be divided into different functional modules to implement all or part of the functions described above. In addition, the apparatus and method embodiments provided by the above embodiments belong to the same concept, and specific implementation processes thereof are described in the method embodiments for details, which are not described herein again.
There is provided a computer readable storage medium having stored therein at least one program code, the program code being loaded into and executed by a processor to implement any of the methods of determining a usage of a transient occlusion agent as described in the method embodiments.
Alternatively, the computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a Compact Disc Read-Only Memory (CD-ROM), a magnetic tape, a floppy disk, an optical data storage device, and the like.
In an exemplary embodiment, a computer program or a computer program product is also provided, in which at least one computer instruction is stored, the at least one computer instruction being loaded and executed by a processor, so as to cause a computer to implement any of the above methods for determining an amount of a transient blocking agent.
Referring to fig. 4, a schematic structural diagram of a computer device that may generate relatively large differences due to different configurations or performances according to the embodiments of the present application is provided, where the computer device may include one or more processors (CPUs) 401 and one or more memories 402, where at least one program instruction is stored in the one or more memories 402, and is loaded and executed by the one or more processors 401 to implement the method for determining an amount of a transient occlusion agent provided in the foregoing method embodiments. Of course, the electronic device may further have components such as a wired or wireless network interface, a keyboard, and an input/output interface, so as to perform input/output, and the electronic device may further include other components for implementing the functions of the device, which is not described herein again.
It should be understood that, in the embodiments of the present application, the size of the serial number of each process does not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
The term "at least one" in this application means one or more, and the term "plurality" in this application means two or more.
It is to be understood that the terminology used in the description of the various examples herein is for the purpose of describing particular examples only and is not intended to be limiting. As used in the description of various examples and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It will be further understood that the terms "comprises," "comprising," "includes," and/or "including," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It should be understood that determining B from a does not mean determining B from a alone, but may also be determined from a and/or other information.
It is also to be understood that the terms "if" and "if" may be interpreted to mean "when" ("where" or "upon") or "in response to a determination" or "in response to a detection". Similarly, the phrase "if it is determined," or "if [ a stated condition or event ] is detected," may be interpreted to mean "upon determining" or "in response to determining.
It should also be appreciated that reference throughout this specification to "one embodiment," "an embodiment," "one possible implementation" means that a particular feature, structure, or characteristic described in connection with the embodiment or implementation is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" or "one possible implementation" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
The above are only examples of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application.
Claims (10)
1. A method of determining the amount of a temporary plugging agent, the method comprising:
determining the balance time according to a first intra-fracture pressure and a first average sand ratio, wherein the first intra-fracture pressure refers to the pressure in the fractured fracture before the temporary plugging agent is added;
determining a second average sand ratio according to a second fracture internal pressure and the balance time, wherein the second fracture internal pressure refers to the pressure in the fracturing fracture after the temporary plugging agent is added;
and determining the using amount of the temporary plugging agent based on the construction displacement, the balance time, the first average sand ratio and the second average sand ratio.
2. The method of claim 1, wherein determining an equilibrium time based on the first intra-seam pressure and the first average sand ratio comprises:
determining a first equilibrium height based on the first intra-seam pressure;
determining the equilibration time based on the first equilibration height and the first average sand ratio.
3. The method of claim 2, wherein said determining a first equilibrium height based on said first intra-seam pressure comprises:
determining a first particle sedimentation equilibrium resistance velocity based on the relationship between the intra-seam pressure and the particle sedimentation equilibrium resistance velocity and the first intra-seam pressure;
determining a first equilibrium flow rate based on the relationship of particle settling equilibrium resistance velocity to equilibrium flow rate and the first particle settling equilibrium resistance velocity;
determining the first equilibrium height based on the first equilibrium flow rate.
4. The method of claim 3, wherein determining the first equilibrium height based on the first equilibrium flow rate comprises:
determining a first balanced flow section height at the first balanced flow rate based on the first balanced flow rate and construction displacement;
determining the first balance height based on the first balance time flow section height and the fracture height of the fracturing fracture.
5. The method of any of claims 1-4, wherein prior to determining a second average sand ratio based on the second intra-seam pressure and the equilibration time, the method further comprises:
determining an expected additional pressure after adding the temporary plugging agent;
taking the sum of the expected additional pressure and the first intra-slit pressure as the second intra-slit pressure.
6. The method of any of claims 1-4, wherein prior to determining the equilibration time based on the first intra-seam pressure and the first average sand ratio, the method further comprises:
and acquiring fracturing fracture form parameters and fracturing construction parameters of the target well before adding the temporary plugging agent based on single-well geological data of the target well and production dynamic data of adjacent wells, wherein the fracturing fracture form parameters comprise the fracture height of the fracturing fracture, and the fracturing construction parameters comprise the first fracture internal pressure and the first average sand ratio.
7. The method of any of claims 1-4, wherein determining the fugitive agent dosage based on the construction displacement, the equilibration time, the first average sand ratio, and the second average sand ratio comprises:
taking the difference between the second average sand ratio and the first average sand ratio as an increment of the average sand ratio;
determining a temporary plugging agent volume based on the construction displacement, the equilibration time and the increment of the average sand ratio;
and determining the dosage of the temporary plugging agent based on the volume and density of the temporary plugging agent.
8. An apparatus for determining the amount of a temporary plugging agent, the apparatus comprising:
the first determination module is used for determining the balance time according to a first intra-fracture pressure and a first average sand ratio, wherein the first intra-fracture pressure refers to the pressure in the fractured fracture before the temporary plugging agent is added;
the second determination module is used for determining a second average sand ratio according to a second intra-fracture pressure and the balance time, wherein the second intra-fracture pressure refers to the pressure in the fractured fracture after the temporary plugging agent is added;
and the third determination module is used for determining the using amount of the temporary plugging agent based on the construction displacement, the balance time, the first average sand ratio and the second average sand ratio.
9. A computer device comprising a processor and a memory, the memory having at least one computer program stored therein; the at least one computer program is loaded and executed by one or more of the processors to cause a computer to perform the method for determining a usage amount of a transient blocking agent according to any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that at least one program code is stored in the computer-readable storage medium, which program code is loaded and executed by a processor, to make a computer implement the method for determining a usage amount of a transient plugging agent according to any of claims 1 to 7.
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