CN116956761A - Method and device for determining comprehensive elastic compression coefficient of ultra-deep broken solution oil reservoir stratum - Google Patents
Method and device for determining comprehensive elastic compression coefficient of ultra-deep broken solution oil reservoir stratum Download PDFInfo
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Abstract
The application relates to a method and a device for determining the comprehensive elastic compression coefficient of an ultra-deep broken solution oil reservoir stratum, a storage medium and electronic equipment, wherein the method comprises the following steps: calculating single well control reserves of each oil well in the target stratum according to a fracture-cavity volume carving method; calculating linear intercept of a linear relation equation according to the product of the accumulated oil yield of a single well and the initial formation pressure of the control reserve of the single well of each oil well; calculating an average stratum pressure retention degree value according to single well pressure measurement data of each oil well; according to PVT data of each oil well, obtaining the ratio of the crude oil volume coefficient under the initial oil reservoir condition to the crude oil volume coefficient under the current stratum pressure; and calculating the comprehensive elastic compression coefficient of the target stratum. The calculation method is suitable for any complex oil reservoir, has high reliability and quick calculation, and simultaneously solves the technical problems of limitation requirements on oil wells and poor applicability to ultra-deep broken solution oil reservoirs in the related technology.
Description
Technical Field
The application relates to the technical field of oil reservoir engineering, in particular to a method and a device for determining an ultra-deep broken solution oil reservoir stratum comprehensive elastic compression coefficient, a storage medium and electronic equipment.
Background
The rock has pores and can thus be compressed, i.e. have a certain elastoplasticity. Before the development of the oil-gas field, the pressure of overlying rock (external force) in the stratum, the pressure of stratum (fluid pressure in the pores) and the pressure born by the rock framework under the original conditions are in an equilibrium state. After the development, as the fluid in the stratum is extracted, the stratum pressure is continuously reduced, the pressure balance relation is destroyed, the difference between external pressure and internal pressure is increased, rock particles are extruded and deformed under the action of overlying rock pressure, the arrangement is more compact, the pore volume is reduced, and simultaneously, the fluid is expanded due to the reduction of the stratum pressure, so that part of stratum fluid is discharged and driven into a production well under the combined action of the two, namely, the stratum has very large elastic energy. The elastic energy of the stratum comprises the elasticity of all fluids and rocks in the stratum, and the elastic compression coefficient of the stratum is generally used for expressing the elasticity of the whole stratum, which is defined as: the total volume change of pores and liquid per apparent volume of rock per unit pressure drop generated by formation pressure is expressed mathematically as (Yang Shenglai, wei Jun. Reservoir physics [ M ]. Beijing: oil industry Press, 2004):
wherein c t For the stratum comprehensive elastic compression coefficient, MPa -1 ；V b For apparent volume of rock, i.e. apparent volume, m 3 ；ΔV o For pore and total volume change of liquid, m 3 The method comprises the steps of carrying out a first treatment on the surface of the Δp is the formation pressure drop, MPa.
For the two phases of oil and water, deltaV o Is equal to the sum of the elastic oil displacement and the elastic oil-water expansion, and can be derived based on the meanings of the elastic compression coefficients of rock, oil and water respectively (Yang Shenglai, wei Jun. Reservoir physics [ M)]Beijing: oil industry press, 2004):
c t ＝(c o s o +c w s w )φ+c f (2)
wherein c o 、c w And c f Elastic compression coefficients of oil, water and rock respectively, MPa -1 The method comprises the steps of carrying out a first treatment on the surface of the Phi is the porosity; s is(s) o 、s w Oil, water saturation, respectively.
The European and American family commonly adopts the rock pore volume compression coefficient c p It is defined as: the pore volume change value produced by the rock per pore volume per formation pressure per unit pressure drop, namely:
wherein c p Is the rock pore volume compression coefficient, MPa -1 ；V p Is the rock pore volume, m3; deltaV p For rock pore volume variation, m 3 。
The following relationship is satisfied between the rock elastic compression coefficient and the rock pore volume compression coefficient:
c f ＝c p φ (4)
bringing equation (4) into equation (2) yields a formation complex elastic compression coefficient of:
c t ＝(c o s o +c w s w +c p )φ (5)
for conventional sandstone reservoirs, the elastic compression coefficient c of the oil o Elastic compression coefficient c of water w Rock pore volume compression coefficient c p Can be generally predicted by experimental determination or an empirical formula, and the rock pore volume compression coefficient c is weak due to single rock pore structure, non-development of cracks and dissolving holes and non-homogeneity p The reliability of the indoor test is higher, and the comprehensive elastic compression coefficient of the stratum can be determined according to the formula (5) by combining the porosity phi of the reservoir. However, for ultra-deep broken solution reservoirs with complex pore structure, crack and solution pore development and strong heterogeneity, the compression coefficient c of the rock pore volume is used p The porosity phi is difficult to accurately measure, the error of the comprehensive elastic compression coefficient of the stratum is large by directly using the formula (5), and the reliability is low.
At present, the method for determining the comprehensive elastic compression coefficient of the stratum ultra-deep broken solution oil reservoir is mainly as follows.
First kind: laboratory test methods. The laboratory tests the rock pore volume compression factor and porosity and calculates the formation complex elastic compression factor using equation (5).
Equation (2) shows that: to calculate the stratum comprehensive elastic compression coefficient c t The key is to determine c o 、c w 、c f And phi due to c o And c w The oil and water sample are easy to accurately measure, so how to accurately obtain the rock elastic compression coefficient c f And reservoir porosity phi becomes the determined formation integrated elastic compression coefficient c t Is critical to (1). And because of the rock elastic compression coefficient c f Compression system with rock pore volumeNumber c p Equation (4) is satisfied, and therefore, the laboratory is largely informed by determining the rock pore volume compression coefficient c p And determining the rock elastic compression coefficient c from the porosity phi f . Currently determining the rock pore volume compression coefficient c p Established industry standard (SY/T5815-2016, rock pore volume compression coefficient determination method [ S ]]) Comprising 2 methods: (1) the overburden rock pressure is established, the overburden rock pressure is kept unchanged, the pore pressure is reduced point by point, the effective overburden rock pressure is increased, and the pore volume is reduced; (2) the pore pressure is kept unchanged, the overburden pressure is increased point by point, so that the effective overburden pressure is increased, and the pore volume is reduced. And (3) drawing a change curve of the decrease of the pore volume with the increase of the effective overburden rock pressure in the experiment, and calculating the compression coefficient of the pore volume of the rock according to a formula (3).
The method has the advantages that: the method has good applicability and high accuracy to the reservoir of the inter-particle pore structure of the single pore medium. The reservoir has single pore structure, weak heterogeneity, no development of cracks and solution holes, accurate compression coefficient and porosity of the rock pore volume tested in a laboratory, and strong block representativeness of test results, so that the comprehensive elastic compression coefficient of the stratum obtained by calculation according to the formula (5) has high reliability.
The method has the following defects: the method has poor applicability to ultra-deep broken solution reservoirs in the Tarim basin. The ultra-deep broken solution oil reservoir of the Tarim basin is a special fracture-cavity oil reservoir, cracks and holes are very developed, the heterogeneity of the reservoir is very strong, the differences of physical properties of broken zones, induced fracture zones and surrounding rocks are very large, a representative core sample is difficult to obtain by core sampling of a mine, the rock pore volume compression coefficient and the porosity representativeness obtained by laboratory tests are poor, and the comprehensive elastic compression coefficient of the stratum of the oil reservoir or a communicating unit cannot be comprehensively and accurately reflected.
The second method is as follows: water content method. And predicting the rock pore volume compression coefficient based on the water content in the elastic stage, and calculating the stratum comprehensive elastic compression coefficient by using a formula (5).
The control equation for the rock pore volume compression coefficient is calculated as (Zhang Xiaoliang. New method for rock pore compression coefficient calculation [ J ]. Special oil and gas reservoir, 2014,21 (3): 97-99.):
wherein S is wi And S is w Initial water saturation and current water saturation, respectively; c (C) w Is the elastic compression coefficient of water, MPa -1 ；f wL The ratio of the accumulated water yield to the accumulated liquid yield is; Δp is the formation pressure drop, MPa.
Saturation of water S w The determination is needed according to the shunt value equation:
Wherein f w The water content is the water content; mu (mu) o Sum mu w The viscosity of oil and water are respectively mPa.s; b (B) o And B w Volume coefficients of oil and water, m 3 /m 3 ；K ro And K rw Oil and water permeabilities, respectively.
The water saturation S is determined according to the phase permeability curve and equation (7) w Then the rock pore volume compression coefficient c is calculated according to equation (6) p Finally, calculating the stratum comprehensive elastic compression coefficient c according to the equation (5) t 。
The method has the advantages that: the dynamic data of oil well production is fully utilized, and the reliability is high;
the method has the following defects: requiring oil wells to meet water, and not being suitable for oil wells without water; and because the split-flow equation is derived based on the darcy formula, this method requires that the fluid flow law be in accordance with darcy's law. Many oil wells of the ultra-deep cut-off solution oil reservoir of the Tarim basin are not used for producing water, and the flow rule does not accord with the traditional Darcy law, so that the applicability of the method for the ultra-deep cut-off solution oil reservoir is not high.
Disclosure of Invention
Aiming at the problems, the application provides a method and a device for determining the comprehensive elastic compression coefficient of an ultra-deep broken solution oil reservoir stratum, a storage medium and electronic equipment, and solves the technical problems of limitation requirements on an oil well and poor applicability to the ultra-deep broken solution oil reservoir in the related technology.
In a first aspect, the application provides a method for determining an ultra-deep broken solution oil reservoir stratum comprehensive elastic compression coefficient, which comprises the following steps:
calculating single well control reserves of each oil well in the target stratum according to a fracture-cavity volume carving method;
acquiring single well accumulated oil yield, single well control reserve initial formation pressure product, single well pressure measurement data and PVT data of each oil well of a target formation;
calculating linear intercept of a linear relation equation according to the product of the accumulated oil yield of a single well and the initial formation pressure of the control reserve of the single well of each oil well;
calculating an average stratum pressure retention degree value according to the single well pressure measurement data of each oil well;
according to PVT data of each oil well, obtaining the ratio of the crude oil volume coefficient under the initial oil reservoir condition to the crude oil volume coefficient under the current stratum pressure;
and calculating the comprehensive elastic compression coefficient of the target stratum according to the linear intercept of the linear relation equation, the average stratum pressure maintenance degree value, and the ratio of the crude oil volume coefficient under the initial oil reservoir condition to the crude oil volume coefficient under the current stratum pressure.
In some embodiments, the calculating the comprehensive elastic compression coefficient of the target stratum according to the linear intercept of the linear relation equation, the average stratum pressure maintenance degree value, the ratio of the crude oil volume coefficient under the initial oil reservoir condition to the crude oil volume coefficient under the current stratum pressure comprises:
According to the formulaCalculating the comprehensive elastic compression coefficient c of the target stratum t ；
Wherein b is the linear intercept according to the linear relation equation,maintaining a degree value for the average formation pressure, B oi For the volume coefficient of crude oil under the initial oil reservoir condition, B o Is the volume coefficient of crude oil under the current formation pressure.
In some embodiments, the calculating the linear intercept of the linear relation equation according to the product of the accumulated oil production of the single well and the initial formation pressure of the single well control reserves of each oil well comprises:
drawing a linear relation diagram of the product of the single-well accumulated oil yield and the single-well control reservoir initial stratum pressure of each oil well by taking the accumulated oil yield of the single well as a Y coordinate and taking the product of the single-well control reservoir initial stratum pressure as an X coordinate;
and obtaining the linear intercept of the linear relation equation according to the linear relation diagram.
In some embodiments, the calculating the average formation pressure retention level value according to the single well pressure measurement data of each oil well comprises:
acquiring initial formation pressure and current formation pressure of each oil well from the single well pressure measurement data;
calculating a formation pressure retention degree value of each oil well according to the initial formation pressure and the current formation pressure;
And averaging the formation pressure maintaining degree of each oil well to obtain the average formation pressure maintaining degree value.
In some embodiments, the obtaining the ratio of the crude oil volume coefficient under the initial reservoir condition to the crude oil volume coefficient under the current formation pressure according to the PVT data of each oil well comprises:
according to PVT data of each oil well, obtaining a crude oil volume coefficient under an initial oil reservoir condition and a crude oil volume coefficient under the current formation pressure;
dividing the crude oil volume coefficient under the initial oil reservoir condition by the crude oil volume coefficient under the current stratum pressure to obtain the ratio of the crude oil volume coefficient under the initial oil reservoir condition to the crude oil volume coefficient under the current stratum pressure.
In some embodiments, the obtaining the initial formation pressure product of the single well control reserves for each well comprises:
acquiring the initial stratum pressure of each oil well according to the single well pressure measurement data;
multiplying the initial formation pressure of each well by the single well control reserve to obtain the single well control reserve initial formation pressure product of each well.
In some embodiments, the formulaIs based on the principle of mass balance.
In a second aspect, an apparatus for determining a comprehensive elastic compression coefficient of an ultra-deep fracture solution reservoir stratum, the apparatus comprising:
The first calculation unit is used for calculating the single well control reserves of each oil well in the target stratum according to the fracture-cavity volume carving method;
the first acquisition unit is used for acquiring single well accumulated oil yield, single well control reserve initial stratum pressure product, single well pressure measurement data and PVT data of each oil well of the target stratum;
the second calculation unit is used for calculating linear intercept of the linear relation equation according to the product of the accumulated oil yield of the single well and the initial formation pressure of the single well control reserve of each oil well;
the third calculation unit is used for calculating an average stratum pressure retention degree value according to the single well pressure measurement data of each oil well;
the second acquisition unit is used for acquiring the ratio of the crude oil volume coefficient under the initial oil reservoir condition to the crude oil volume coefficient under the current stratum pressure according to the PVT data of each oil well;
and the fourth calculation unit is used for calculating the comprehensive elastic compression coefficient of the target stratum according to the linear intercept of the linear relation equation, the average stratum pressure maintenance degree value, and the ratio of the crude oil volume coefficient under the initial oil reservoir condition to the crude oil volume coefficient under the current stratum pressure.
In a fourth aspect, a storage medium stores a computer program executable by one or more processors to implement the method for determining a comprehensive elastic compression coefficient of an ultra-deep fracture solution reservoir formation according to the first aspect.
In a fourth aspect, an electronic device includes a memory and a processor, where the memory stores a computer program, where the memory and the processor are communicatively connected to each other, and where the computer program, when executed by the processor, performs the method for determining a comprehensive elastic compression coefficient of an ultra-deep fracture solution reservoir stratum according to the first aspect.
The application provides a method, a device, a storage medium and electronic equipment for determining the comprehensive elastic compression coefficient of an ultra-deep broken solution oil reservoir stratum, which comprise the following steps: calculating single well control reserves of each oil well in the target stratum according to a fracture-cavity volume carving method; acquiring single well accumulated oil yield, single well control reserve initial formation pressure product, single well pressure measurement data and PVT data of each oil well of a target formation; calculating linear intercept of a linear relation equation according to the product of the accumulated oil yield of a single well and the initial formation pressure of the control reserve of the single well of each oil well; calculating an average stratum pressure retention degree value according to the single well pressure measurement data of each oil well; according to PVT data of each oil well, obtaining the ratio of the crude oil volume coefficient under the initial oil reservoir condition to the crude oil volume coefficient under the current stratum pressure; and calculating the comprehensive elastic compression coefficient of the target stratum according to the linear intercept of the linear relation equation, the average stratum pressure maintenance degree value, and the ratio of the crude oil volume coefficient under the initial oil reservoir condition to the crude oil volume coefficient under the current stratum pressure.
The comprehensive elastic compression determination method provided by the invention has the following beneficial effects:
(1) The reliability of the calculation result is high. The material balance equation has universality, is suitable for any complex oil reservoir, the stratum comprehensive elastic compression coefficient control equation is exactly derived based on the ultra-deep broken solution oil reservoir material balance equation, and the method fully utilizes hard data such as actual measurement PVT data of a mine, pressure measurement data of an oil well, blocks, communication units, oil well yield and the like in the calculation process, and is consistent with actual production dynamic data, so that the stratum comprehensive elastic compression coefficient obtained by calculation by the method is higher in reliability;
(2) The calculation is quick and convenient, and the required parameters are easy to obtain. The laboratory test method for determining the comprehensive elastic compression coefficient of the stratum needs to take a great deal of time to carry out indoor test in a laboratory, is time-consuming and labor-consuming, has high uncertainty of the elastic compression coefficient of rock and fluid, and needs to be repeatedly measured. The method directly calculates the stratum comprehensive elastic compression coefficient, and the required parameters comprise the single well accumulated oil yield of each oil well of the target stratum, the single well control reserve initial stratum pressure product, the single well pressure measurement data and the PVT data, most of the parameters are easy to obtain, and the mine site is often tested, so that the accuracy of the data can be ensured, and the calculation is rapid and convenient.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present application, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of a method for determining the comprehensive elastic compression coefficient of an ultra-deep broken solution oil reservoir stratum, which is provided by the embodiment of the application;
FIG. 2 is a graph showing the relationship between the volume coefficient of crude oil in a certain well of an ultra-deep broken solution reservoir and the pressure change according to the embodiment of the application;
FIG. 3 shows an F unit lnN according to an embodiment of the present application p And ln (Np) i ) A linear relationship diagram;
FIG. 4 is a schematic structural diagram of a device for determining the comprehensive elastic compression coefficient of an ultra-deep broken solution oil reservoir stratum, which is provided by the embodiment of the application;
fig. 5 is a connection block diagram of an electronic device according to an embodiment of the present application.
Detailed Description
The following will describe embodiments of the present application in detail with reference to the drawings and examples, thereby solving the technical problems by applying technical means to the present application, and realizing the corresponding technical effects can be fully understood and implemented accordingly. The embodiment of the application and the characteristics in the embodiment can be mutually combined on the premise of no conflict, and the formed technical scheme is within the protection scope of the application.
The background technology shows that the existing method for determining the comprehensive elastic compression coefficient of the stratum ultra-deep broken solution oil reservoir mainly comprises a laboratory test method and a water content method, wherein the laboratory test method has poor applicability to the Tarim basin ultra-deep broken solution oil reservoir. The ultra-deep broken solution oil reservoir of the Tarim basin is a special fracture-cavity oil reservoir, cracks and holes are very developed, the heterogeneity of the reservoir is very strong, the differences of physical properties of broken zones, induced fracture zones and surrounding rocks are very large, a representative core sample is difficult to obtain by core sampling of a mine, the rock pore volume compression coefficient and the porosity representativeness obtained by laboratory tests are poor, and the stratum comprehensive elastic compression coefficient of the oil reservoir or a communicating unit cannot be comprehensively and accurately reflected; the water content method requires water breakthrough of the oil well, and is not suitable for the oil well without water breakthrough; and because the split-flow equation is derived based on the darcy formula, this method requires that the fluid flow law be in accordance with darcy's law. The ultra-deep broken solution oil reservoir in the Tarim basin is not water-free in many oil well production, and the flow rule does not accord with the traditional Darcy law, so the applicability of the method for the ultra-deep broken solution oil reservoir is not high;
In view of the above, the application provides a method, a device, a storage medium and electronic equipment for determining the comprehensive elastic compression coefficient of an ultra-deep solution oil reservoir stratum, which solve the technical problems of limitation requirements on oil wells and poor applicability to the ultra-deep solution oil reservoir in the related technology.
Example 1
Fig. 1 is a schematic flow chart of a method for determining an overall elastic compression coefficient of an ultra-deep broken solution oil reservoir stratum according to an embodiment of the present application, where, as shown in fig. 1, the method includes:
s101, calculating single well control reserves of each oil well in a target stratum according to a fracture-cavity volume carving method;
it should be noted that, calculating the geological reserves or single well control reserves of the communication unit of the ultra-deep broken solution oil reservoir by using the fracture-cavity volume carving method mainly comprises the following steps: determining the volume of a fracture hole; determining effective porosity; determining original oil saturation; and determining an oil-water interface, selecting parameters such as crude oil volume coefficient, crude oil density and the like based on PVT data of a target area, and calculating the geological reserves or splitting of the ultra-deep broken solution oil reservoir communication unit to obtain single well control reserves.
What needs to be stated is: at present, the calculation of the oil reservoir reserves of the disconnected solution is mainly carried out by utilizing a volume carving method, uncertainty exists, and in order to reduce the uncertainty to the greatest extent, the data of well drilling and completion, logging, earthquake, PVT, production dynamics and the like are required to be fully utilized, the geological reserves or single well control reserves of a communication unit are determined through dynamic and static combination, and once the geological reserves or the single well control reserves are determined, the stratum comprehensive elastic compression coefficient c t It is determined that there is a correspondence between the two.
S102, acquiring single well accumulated oil yield, single well control reserve initial stratum pressure product, single well pressure measurement data and PVT data of each oil well of a target stratum;
s103, calculating linear intercept of a linear relation equation according to the product of the accumulated oil yield of a single well and the initial formation pressure of the control reserve of the single well of each oil well;
s104, calculating an average stratum pressure retention degree value according to the single well pressure measurement data of each oil well;
s105, obtaining the ratio of the crude oil volume coefficient under the initial oil reservoir condition to the crude oil volume coefficient under the current stratum pressure according to PVT data of each oil well;
s106, calculating the comprehensive elastic compression coefficient of the target stratum according to the linear intercept of the linear relation equation, the average stratum pressure maintenance degree value, and the ratio of the crude oil volume coefficient under the initial oil reservoir condition to the crude oil volume coefficient under the current stratum pressure.
The invention provides a method for determining the comprehensive elastic compression coefficient of an ultra-deep broken solution oil reservoir stratum based on material balance. The basic principle of material balance is that an oil reservoir is regarded as a container with unchanged volume, and the amount of fluid produced plus the underground residual storage amount at a certain moment in the oil reservoir development process is equal to the original storage amount of the fluid. The material balance principle is simple, the applicability is wide, and the method is applicable to complex and strongly heterogeneous reservoirs. The method for determining the comprehensive elastic compression coefficient of the stratum ultra-deep broken solution oil reservoir provides support for interpretation of test well of the ultra-deep broken solution oil reservoir, evaluation of elastic productivity and numerical simulation of the oil reservoir.
In some embodiments, the formulaIs based on the principle of mass balance.
Specifically, the formulaThe establishment process of (2) is as follows:
taking a certain ultra-deep broken solution oil reservoir of a Tarim basin as an example, the initial development stage is mainly based on elastic driving, the water invasion effect is weak, water is not produced, water is not injected manually, and a material balance equation can be written as follows:
N p B o ＝NB oi c t (p i -p) (8)
wherein N is p For accumulating oil m 3 The method comprises the steps of carrying out a first treatment on the surface of the N is block geological reserves or single well control reserves, m 3 ；p i And p is the initial formation pressure and the current formation pressure, MPa, respectively; c t For the stratum comprehensive elastic compression coefficient, MPa -1 ；B o And B oi The formation crude oil volume coefficient when the pressure is equal to p and the formation crude oil volume coefficient under the initial formation pressure, m 3 /m 3 。
The elastic drive is developed to a certain stage, and the formation pressure retention degree of the ultra-deep broken solution reservoir is assumed to beI.e. < ->Equation (8) may be rewritten as:
taking the logarithm of both sides of equation (9) at the same time:
the second term and the third term on the right side of the equation (10) are both dimensionless quantities, wherein,indicating when the formation pressure is maintained to a degree +.>When the elastic oil displacement of the fracture-cavity reservoir body is realized in unit apparent volume.
Equation (10) can be further rewritten as:
let y=lnn p ，X＝ln(Np i )，Equation (11) can be expressed as:
Y＝X+b (12)
for an ultra-deep broken solution reservoir or a communication unit with small scale and good well-to-well connectivity, theoretically, Y is taken as an ordinate, X is taken as an abscissa, the Y and the X are straight lines with the slope equal to 1, and the intercept of the straight lines mainly indicates the influence of the comprehensive elastic compression coefficient of the stratum in stratum elastic energy on accumulated oil. The value b can be obtained according to the straight line intercept of the equation (12), and the stratum comprehensive elastic compression coefficient c can be calculated according to the value b t The control equation is as follows:
in some embodiments, the calculating the comprehensive elastic compression coefficient of the target stratum according to the linear intercept of the linear relation equation, the average stratum pressure maintenance degree value, the ratio of the crude oil volume coefficient under the initial oil reservoir condition to the crude oil volume coefficient under the current stratum pressure comprises:
according to the formulaCalculating the comprehensive elastic compression coefficient c of the target stratum t ；
Wherein b is the linear intercept according to the linear relation equation,maintaining a degree value for the average formation pressure, B oi For the volume coefficient of crude oil under the initial oil reservoir condition, B o Is the volume coefficient of crude oil under the current formation pressure.
In some embodiments, the calculating the linear intercept of the linear relation equation according to the product of the accumulated oil production of the single well and the initial formation pressure of the single well control reserves of each oil well comprises:
taking the logarithm of the accumulated oil yield of a single well as a Y coordinate and the logarithm of the product of the initial formation pressure of the control reserve of the single well as an X coordinate, and drawing a linear relation diagram of the product of the accumulated oil yield of the single well and the initial formation pressure of the control reserve of the single well of each oil well;
and obtaining the linear intercept of the linear relation equation according to regression of the linear relation graph.
It is to be noted that y=lnn, which is derived from the principle of mass balance in the former part p And x=ln (Np i ) And (3) the linear relation is satisfied, a linear relation diagram between an actual oil reservoir or a communication unit Y and X is drawn and returned, and a linear intercept b of a linear relation equation is obtained.
In some embodiments, the calculating the average formation pressure retention level value according to the single well pressure measurement data of each oil well comprises:
acquiring initial formation pressure and current formation pressure of each oil well from the single well pressure measurement data;
calculating a formation pressure retention degree value of each oil well according to the initial formation pressure and the current formation pressure;
and averaging the formation pressure maintaining degree of each oil well to obtain the average formation pressure maintaining degree value.
It should be noted that the initial static pressure p of different oil wells is tested by closing the well i And the oil well static pressure p at different moments, and the related test data can be used for consulting an oil well pressure measurement report. Calculating the degree of pressure retention of different oil well stratum at a certain moment lambda=p/p i . Averaging all well formation pressure retention levels lambda as the average formation pressure retention level of the entire communication unit
In some embodiments, the obtaining the ratio of the crude oil volume coefficient under the initial reservoir condition to the crude oil volume coefficient under the current formation pressure according to the PVT data of each oil well comprises:
According to PVT data of each oil well, obtaining a crude oil volume coefficient under an initial oil reservoir condition and a crude oil volume coefficient under the current formation pressure;
dividing the crude oil volume coefficient under the initial oil reservoir condition by the crude oil volume coefficient under the current stratum pressure to obtain the ratio of the crude oil volume coefficient under the initial oil reservoir condition to the crude oil volume coefficient under the current stratum pressure.
It should be noted that each oil well has a PVT test report, and the PVT test report includes a graph of crude oil volume coefficients under different pressures and a graph of crude oil volume coefficients changing with pressure, as shown in fig. 2, which is a graph of crude oil volume coefficients changing with pressure of a certain well of an ultra-deep broken solution oil reservoir. On the basis, the ratio B of the volume coefficient of the crude oil under the initial formation pressure to the volume coefficient of the crude oil under the current formation pressure (before oil reservoir degassing) can be calculated oi /B o 。
In some embodiments, the obtaining the initial formation pressure product of the single well control reserves for each well comprises:
acquiring the initial stratum pressure of each oil well according to the single well pressure measurement data;
multiplying the initial formation pressure of each well by the single well control reserve to obtain the single well control reserve initial formation pressure product of each well.
In summary, the embodiment of the application provides a method for determining an ultra-deep broken solution oil reservoir stratum comprehensive elastic compression coefficient, which comprises the following steps: calculating single well control reserves of each oil well in the target stratum according to a fracture-cavity volume carving method; acquiring single well accumulated oil yield, single well control reserve initial formation pressure product, single well pressure measurement data and PVT data of each oil well of a target formation; calculating linear intercept of a linear relation equation according to the product of the accumulated oil yield of a single well and the initial formation pressure of the control reserve of the single well of each oil well; calculating an average stratum pressure retention degree value according to the single well pressure measurement data of each oil well; according to PVT data of each oil well, obtaining the ratio of the crude oil volume coefficient under the initial oil reservoir condition to the crude oil volume coefficient under the current stratum pressure; and calculating the comprehensive elastic compression coefficient of the target stratum according to the linear intercept of the linear relation equation, the average stratum pressure maintenance degree value, and the ratio of the crude oil volume coefficient under the initial oil reservoir condition to the crude oil volume coefficient under the current stratum pressure.
The comprehensive elastic compression determination method provided by the invention has the following beneficial effects:
(1) The reliability of the calculation result is high. The material balance equation has universality, is suitable for any complex oil reservoir, the stratum comprehensive elastic compression coefficient control equation is exactly derived based on the ultra-deep broken solution oil reservoir material balance equation, and the method fully utilizes hard data such as actual measurement PVT data of a mine, pressure measurement data of an oil well, blocks, communication units, oil well yield and the like in the calculation process, and is consistent with actual production dynamic data, so that the stratum comprehensive elastic compression coefficient obtained by calculation by the method is higher in reliability;
(2) The calculation is quick and convenient, and the required parameters are easy to obtain. The laboratory test method for determining the comprehensive elastic compression coefficient of the stratum needs to take a great deal of time to carry out indoor test in a laboratory, is time-consuming and labor-consuming, has high uncertainty of the elastic compression coefficient of rock and fluid, and needs to be repeatedly measured. The method directly calculates the stratum comprehensive elastic compression coefficient, and the required parameters comprise the single well accumulated oil yield of each oil well of the target stratum, the single well control reserve initial stratum pressure product, the single well pressure measurement data and the PVT data, most of the parameters are easy to obtain, and the mine site is often tested, so that the accuracy of the data can be ensured, and the calculation is rapid and convenient.
Example two
Based on the method for determining the comprehensive elastic compression coefficient of the ultra-deep broken solution oil reservoir stratum disclosed by the embodiment of the invention, the embodiment application is developed by taking the F unit of the ultra-deep broken solution oil reservoir of the Tarim basin as an example. The measured formation static pressure, the current formation pressure maintenance degree, the current accumulated oil yield and the single well control reserve of the F unit for different oil wells are shown in table 1. In the examples, the surface crude oil density was taken to be 0.8X10 3 kg/m 3 。
TABLE 1
Drawing y=lnn from table 1 data p And x=ln (Np i ) The linear relationship is shown in FIG. 3, which is F unit lnN p And ln (Np) i ) A linear relationship graph.
Fig. 3 shows that: the slope of the curve is 1.0951, and the correlation coefficient is high, which is basically consistent with theoretical analysis. Demonstration of ultra-deep broken solution reservoir elastic drive single well cumulative oil N p Single well control reservoir initial formation pressure product Np i On the semi-logarithmic scale, a straight line with a slope of approximately 1 is provided. The straight line intercept b= -24.177 can be directly obtained from fig. 3.
The single well formation pressure retention degree can be calculated according to the initial formation static pressure of the oil well and the current formation pressure measured by the F unit (see table 1), and the single well formation pressure retention degree is calculated on the basisThe average formation pressure retention of unit F is 61.9%, i.e
Obtaining the crude oil volume coefficient B under the condition of each oil well initial oil reservoir according to the F unit PVT test report oi And the crude oil volume coefficient B under the current formation pressure o Statistics to obtain single well average B under current stratum pressure oi /B o About 0.91.
Finally, calculating the comprehensive elastic compression coefficient c of the F unit stratum according to the formula (13) t ＝9.10×10-5MPa-1。
What needs to be stated is: according to equations (8), (11) and (13), the method for determining the stratum comprehensive elastic compression coefficient of the stratum ultra-deep broken solution oil reservoir provided by the invention is related to geological reserves, stratum pressure retention degree and fluid volume coefficient, and the accuracy of a calculation result is strictly dependent on the accuracy of data such as single well accumulated oil, geological reserves, stratum pressure retention degree and the like. In particular, in the reservoir numerical simulation history fitting, under the condition that the geological reserves of the communicating bodies or the single well control reserves are determined, as the dynamic data such as the formation pressure, the fluid volume coefficient and the like are determined, the dynamic data cannot be adjusted randomly, only the porosity, the permeability, the relative permeability curve, the formation comprehensive compression coefficient and the like can be adjusted to ensure the fit of the geological reserves, the formation pressure and the water content, and the formation comprehensive elastic compression coefficient must be matched with the fit. However, according to the formation comprehensive elastic compression coefficient definition, the numerical value is related to the porosity, the fluid and the rock elastic compression coefficient, and the accuracy of the calculation result is strictly dependent on the laboratory pair c o 、c w 、c p And once the accuracy of phi test is approved, the comprehensive elastic compression coefficient of the stratum can not be adjusted randomly in the history fitting process. In the mine field, the geological reserve is calculated according to a volume carving method, the stratum comprehensive elastic compression coefficient is generally obtained according to an empirical method or an analogy method, and the geological reserve and the stratum comprehensive elastic compression coefficient have stronger uncertainty in the F-type ultra-deep cut-fluid reservoirs, so that the stratum comprehensive elastic pressure of the stratum ultra-deep cut-fluid reservoir provided by the inventionThe shrinkage factor determination method is used as a reference and supplement of a mine field method, and has a certain practical significance.
Example III
Based on the method for determining the comprehensive elastic compression coefficient of the ultra-deep broken solution oil reservoir stratum disclosed by the embodiment of the invention, fig. 4 specifically discloses a device for determining the comprehensive elastic compression coefficient of the ultra-deep broken solution oil reservoir stratum by applying the method for determining the comprehensive elastic compression coefficient of the ultra-deep broken solution oil reservoir stratum.
As shown in fig. 4, the embodiment of the invention discloses a device for determining the comprehensive elastic compression coefficient of an ultra-deep broken solution oil reservoir stratum, which comprises the following steps:
a first calculation unit 401, configured to calculate a single well control reserve of each well in the target stratum according to a fracture-cavity volume carving method;
It should be noted that, calculating the geological reserves or single well control reserves of the communication unit of the ultra-deep broken solution oil reservoir by using the fracture-cavity volume carving method mainly comprises the following steps: determining the volume of a fracture hole; determining effective porosity; determining original oil saturation; and determining an oil-water interface, selecting parameters such as crude oil volume coefficient, crude oil density and the like based on PVT data of a target area, and calculating the geological reserves or splitting of the ultra-deep broken solution oil reservoir communication unit to obtain single well control reserves.
What needs to be stated is: at present, the calculation of the oil reservoir reserves of the disconnected solution is mainly carried out by utilizing a volume carving method, uncertainty exists, and in order to reduce the uncertainty to the greatest extent, the data of well drilling and completion, logging, earthquake, PVT, production dynamics and the like are required to be fully utilized, the geological reserves or single well control reserves of a communication unit are determined through dynamic and static combination, and once the geological reserves or the single well control reserves are determined, the stratum comprehensive elastic compression coefficient c t It is determined that there is a correspondence between the two.
A first obtaining unit 402, configured to obtain a single-well cumulative oil yield, a single-well control reserve initial formation pressure product, single-well pressure measurement data, and PVT data of each oil well of a target formation;
a second calculating unit 403, configured to calculate a linear intercept of a linear relation equation according to a product of the accumulated oil yield of a single well and an initial formation pressure of a single well control reserve of each oil well;
A third calculation unit 404, configured to calculate an average formation pressure retention level value according to the single well pressure measurement data of each oil well;
the second obtaining unit 405 is configured to obtain, according to the PVT data of each oil well, a ratio of a crude oil volume coefficient under an initial oil reservoir condition to a crude oil volume coefficient under a current formation pressure;
and a fourth calculating unit 406, configured to calculate the comprehensive elastic compression coefficient of the target stratum according to the linear intercept of the linear relation equation, the average stratum pressure maintenance degree value, and the ratio of the crude oil volume coefficient under the initial reservoir condition to the crude oil volume coefficient under the current stratum pressure.
The invention provides a method for determining the comprehensive elastic compression coefficient of an ultra-deep broken solution oil reservoir stratum based on material balance. The basic principle of material balance is that an oil reservoir is regarded as a container with unchanged volume, and the amount of fluid produced plus the underground residual storage amount at a certain moment in the oil reservoir development process is equal to the original storage amount of the fluid. The material balance principle is simple, the applicability is wide, and the method is applicable to complex and strongly heterogeneous reservoirs. The method for determining the comprehensive elastic compression coefficient of the stratum ultra-deep broken solution oil reservoir provides support for interpretation of test well of the ultra-deep broken solution oil reservoir, evaluation of elastic productivity and numerical simulation of the oil reservoir.
In some embodiments, the formulaIs based on the principle of mass balance.
Specifically, the formulaThe establishment process of (2) is as follows:
taking a certain ultra-deep broken solution oil reservoir of a Tarim basin as an example, the initial development stage is mainly based on elastic driving, the water invasion effect is weak, water is not produced, water is not injected manually, and a material balance equation can be written as follows:
N p B o ＝NB oi c t (p i -p) (8)
wherein N is p For accumulating oil m 3 The method comprises the steps of carrying out a first treatment on the surface of the N is block geological reserves or single well control reserves, m 3 ；p i And p is the initial formation pressure and the current formation pressure, MPa, respectively; c t For the stratum comprehensive elastic compression coefficient, MPa -1 ；B o And B oi The formation crude oil volume coefficient when the pressure is equal to p and the formation crude oil volume coefficient under the initial formation pressure, m 3 /m 3 。
The elastic drive is developed to a certain stage, and the formation pressure retention degree of the ultra-deep broken solution reservoir is assumed to beI.e. < ->Equation (8) may be rewritten as:
taking the logarithm of both sides of equation (9) at the same time:
the second term and the third term on the right side of the equation (10) are both dimensionless quantities, wherein,indicating when the formation pressure is maintained to a degree +.>When the elastic oil displacement of the fracture-cavity reservoir body is realized in unit apparent volume.
Equation (10) can be further rewritten as:
let y=lnn p ，X＝ln(Np i )，Equation (11) can be expressed as:
Y＝X+b (12)
for an ultra-deep broken solution reservoir or a communication unit with small scale and good well-to-well connectivity, theoretically, Y is taken as an ordinate, X is taken as an abscissa, the Y and the X are straight lines with the slope equal to 1, and the intercept of the straight lines mainly indicates the influence of the comprehensive elastic compression coefficient of the stratum in stratum elastic energy on accumulated oil. The value b can be obtained according to the straight line intercept of the equation (12), and the stratum comprehensive elastic compression coefficient c can be calculated according to the value b t The control equation is as follows:
in some embodiments, the third computing unit comprises:
according to the formulaCalculating the comprehensive elastic compression coefficient c of the target stratum t ；
Wherein b is the linear intercept according to the linear relation equation,maintaining a degree value for the average formation pressure, B oi For the volume coefficient of crude oil under the initial oil reservoir condition, B o Is the volume coefficient of crude oil under the current formation pressure.
In some embodiments, the first computing unit comprises:
taking the logarithm of the accumulated oil yield of a single well as a Y coordinate and the logarithm of the product of the initial formation pressure of the control reserve of the single well as an X coordinate, and drawing a linear relation diagram of the product of the accumulated oil yield of the single well and the initial formation pressure of the control reserve of the single well of each oil well;
and obtaining the linear intercept of the linear relation equation according to regression of the linear relation graph.
It is to be noted that y=lnn, which is derived from the principle of mass balance in the former part p And x=ln (Np i ) And (3) the linear relation is satisfied, a linear relation diagram between an actual oil reservoir or a communication unit Y and X is drawn and returned, and a linear intercept b of a linear relation equation is obtained.
In some embodiments, the second computing unit comprises:
Acquiring initial formation pressure and current formation pressure of each oil well from the single well pressure measurement data;
calculating a formation pressure retention degree value of each oil well according to the initial formation pressure and the current formation pressure;
and averaging the formation pressure maintaining degree of each oil well to obtain the average formation pressure maintaining degree value.
It should be noted that the initial static pressure p of different oil wells is tested by closing the well i And the oil well static pressure p at different moments, and the related test data can be used for consulting an oil well pressure measurement report. Calculating the degree of pressure retention of different oil well stratum at a certain moment lambda=p/p i . Averaging all well formation pressure retention levels lambda as the average formation pressure retention level of the entire communication unit
In some embodiments, the second acquisition unit includes:
according to PVT data of each oil well, obtaining a crude oil volume coefficient under an initial oil reservoir condition and a crude oil volume coefficient under the current formation pressure;
dividing the crude oil volume coefficient under the initial oil reservoir condition by the crude oil volume coefficient under the current stratum pressure to obtain the ratio of the crude oil volume coefficient under the initial oil reservoir condition to the crude oil volume coefficient under the current stratum pressure.
It should be noted that each oil well has a PVT test report, and the PVT test report includes a graph of crude oil volume coefficients under different pressures and a graph of crude oil volume coefficients changing with pressure, as shown in fig. 2, which is a graph of crude oil volume coefficients changing with pressure of a certain well of an ultra-deep broken solution oil reservoir. On the basis, the ratio B of the volume coefficient of the crude oil under the initial formation pressure to the volume coefficient of the crude oil under the current formation pressure (before oil reservoir degassing) can be calculated oi /B o 。
In some embodiments, the first obtaining unit obtains an initial formation pressure product of a single well control reserve for each well, comprising:
acquiring the initial stratum pressure of each oil well according to the single well pressure measurement data;
multiplying the initial formation pressure of each well by the single well control reserve to obtain the single well control reserve initial formation pressure product of each well.
In summary, the embodiment of the application provides a device for determining the comprehensive elastic compression coefficient of an ultra-deep broken solution oil reservoir stratum, which comprises the following steps: calculating single well control reserves of each oil well in the target stratum according to a fracture-cavity volume carving method; acquiring single well accumulated oil yield, single well control reserve initial formation pressure product, single well pressure measurement data and PVT data of each oil well of a target formation; calculating linear intercept of a linear relation equation according to the product of the accumulated oil yield of a single well and the initial formation pressure of the control reserve of the single well of each oil well; calculating an average stratum pressure retention degree value according to the single well pressure measurement data of each oil well; according to PVT data of each oil well, obtaining the ratio of the crude oil volume coefficient under the initial oil reservoir condition to the crude oil volume coefficient under the current stratum pressure; and calculating the comprehensive elastic compression coefficient of the target stratum according to the linear intercept of the linear relation equation, the average stratum pressure maintenance degree value, and the ratio of the crude oil volume coefficient under the initial oil reservoir condition to the crude oil volume coefficient under the current stratum pressure.
The comprehensive elastic compression determination method provided by the invention has the following beneficial effects:
(1) The reliability of the calculation result is high. The material balance equation has universality, is suitable for any complex oil reservoir, the stratum comprehensive elastic compression coefficient control equation is exactly derived based on the ultra-deep broken solution oil reservoir material balance equation, and the method fully utilizes hard data such as actual measurement PVT data of a mine, pressure measurement data of an oil well, blocks, communication units, oil well yield and the like in the calculation process, and is consistent with actual production dynamic data, so that the stratum comprehensive elastic compression coefficient obtained by calculation by the method is higher in reliability;
(2) The calculation is quick and convenient, and the required parameters are easy to obtain. The laboratory test method for determining the comprehensive elastic compression coefficient of the stratum needs to take a great deal of time to carry out indoor test in a laboratory, is time-consuming and labor-consuming, has high uncertainty of the elastic compression coefficient of rock and fluid, and needs to be repeatedly measured. The method directly calculates the stratum comprehensive elastic compression coefficient, and the required parameters comprise the single well accumulated oil yield of each oil well of the target stratum, the single well control reserve initial stratum pressure product, the single well pressure measurement data and the PVT data, most of the parameters are easy to obtain, and the mine site is often tested, so that the accuracy of the data can be ensured, and the calculation is rapid and convenient.
Example IV
The present embodiment also provides a computer readable storage medium, such as a flash memory, a hard disk, a multimedia card, a card memory (e.g., SD or DX memory, etc.), a Random Access Memory (RAM), a Static Random Access Memory (SRAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read-only memory (PROM), a magnetic memory, a magnetic disk, an optical disk, a server, an App application store, etc., on which a computer program is stored, which when executed by a processor, can implement the method steps as in the first embodiment, and the present embodiment will not be repeated here.
Example five
Fig. 5 is a connection block diagram of an electronic device 500 according to an embodiment of the present application, as shown in fig. 5, the electronic device 500 may include: a processor 501, a memory 502, a multimedia component 503, an input/output (I/O) interface 504, and a communication component 505.
The processor 501 is configured to perform all or part of the steps in the method for determining the comprehensive elastic compression coefficient of the ultra-deep fracture fluid reservoir stratum as in the first embodiment. The memory 502 is used to store various types of data, which may include, for example, instructions for any application or method in the electronic device, as well as application-related data.
The processor 501 may be an application specific integrated circuit (Application Specific Integrated Circuit, abbreviated as ASIC), a digital signal processor (Digital Signal Processor, abbreviated as DSP), a digital signal processing device (Digital Signal Processing Device, abbreviated as DSPD), a programmable logic device (Programmable Logic Device, abbreviated as PLD), a field programmable gate array (Field Programmable Gate Array, abbreviated as FPGA), a controller, a microcontroller, a microprocessor, or other electronic component implementation for executing the method for determining the comprehensive elastic compression coefficient of the ultra-deep broken solution reservoir stratum in the above embodiment.
The Memory 502 may be implemented by any type of volatile or non-volatile Memory device or combination thereof, such as static random access Memory (Static Random Access Memory, SRAM for short), electrically erasable programmable Read-Only Memory (Electrically Erasable Programmable Read-Only Memory, EEPROM for short), erasable programmable Read-Only Memory (Erasable Programmable Read-Only Memory, EPROM for short), programmable Read-Only Memory (Programmable Read-Only Memory, PROM for short), read-Only Memory (ROM for short), magnetic Memory, flash Memory, magnetic disk, or optical disk.
The multimedia component 503 may include a screen, which may be a touch screen, and an audio component for outputting and/or inputting audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signal may be further stored in a memory or transmitted through a communication component. The audio assembly further comprises at least one speaker for outputting audio signals.
The I/O interface 504 provides an interface between the processor 501 and other interface modules, which may be a keyboard, mouse, buttons, etc. These buttons may be virtual buttons or physical buttons.
The communication component 505 is used for wired or wireless communication between the electronic device 500 and other devices. Wireless communication, such as Wi-Fi, bluetooth, near field communication (Near Field Communication, NFC for short), 2G, 3G or 4G, or a combination of one or more thereof, the corresponding communication component 505 may thus comprise: wi-Fi module, bluetooth module, NFC module.
In summary, the method, the device, the storage medium and the electronic equipment for determining the comprehensive elastic compression coefficient of the ultra-deep broken solution oil reservoir stratum provided by the application comprise the following steps: calculating single well control reserves of each oil well in the target stratum according to a fracture-cavity volume carving method; acquiring single well accumulated oil yield, single well control reserve initial formation pressure product, single well pressure measurement data and PVT data of each oil well of a target formation; calculating linear intercept of a linear relation equation according to the product of the accumulated oil yield of a single well and the initial formation pressure of the control reserve of the single well of each oil well; calculating an average stratum pressure retention degree value according to the single well pressure measurement data of each oil well; according to PVT data of each oil well, obtaining the ratio of the crude oil volume coefficient under the initial oil reservoir condition to the crude oil volume coefficient under the current stratum pressure; and calculating the comprehensive elastic compression coefficient of the target stratum according to the linear intercept of the linear relation equation, the average stratum pressure maintenance degree value, and the ratio of the crude oil volume coefficient under the initial oil reservoir condition to the crude oil volume coefficient under the current stratum pressure.
The comprehensive elastic compression determination method provided by the invention has the following beneficial effects:
(1) The reliability of the calculation result is high. The material balance equation has universality, is suitable for any complex oil reservoir, the stratum comprehensive elastic compression coefficient control equation is exactly derived based on the ultra-deep broken solution oil reservoir material balance equation, and the method fully utilizes hard data such as actual measurement PVT data of a mine, pressure measurement data of an oil well, blocks, communication units, oil well yield and the like in the calculation process, and is consistent with actual production dynamic data, so that the stratum comprehensive elastic compression coefficient obtained by calculation by the method is higher in reliability;
(2) The calculation is quick and convenient, and the required parameters are easy to obtain. The laboratory test method for determining the comprehensive elastic compression coefficient of the stratum needs to take a great deal of time to carry out indoor test in a laboratory, is time-consuming and labor-consuming, has high uncertainty of the elastic compression coefficient of rock and fluid, and needs to be repeatedly measured. The method directly calculates the stratum comprehensive elastic compression coefficient, and the required parameters comprise the single well accumulated oil yield of each oil well of the target stratum, the single well control reserve initial stratum pressure product, the single well pressure measurement data and the PVT data, most of the parameters are easy to obtain, and the mine site is often tested, so that the accuracy of the data can be ensured, and the calculation is rapid and convenient.
In the embodiments provided in the present application, it should be understood that the disclosed method may be implemented in other manners. The method embodiments described above are merely illustrative.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
Although the embodiments of the present application are described above, the above description is only for the convenience of understanding the present application, and is not intended to limit the present application. Any person skilled in the art can make any modification and variation in form and detail without departing from the spirit and scope of the present disclosure, but the scope of the present disclosure is still subject to the scope of the appended claims.
Claims (10)
1. The method for determining the comprehensive elastic compression coefficient of the ultra-deep broken solution oil reservoir stratum is characterized by comprising the following steps of:
calculating single well control reserves of each oil well in the target stratum according to a fracture-cavity volume carving method;
acquiring single well accumulated oil yield, single well control reserve initial formation pressure product, single well pressure measurement data and PVT data of each oil well of a target formation;
calculating linear intercept of a linear relation equation according to the product of the accumulated oil yield of a single well and the initial formation pressure of the control reserve of the single well of each oil well;
calculating an average stratum pressure retention degree value according to the single well pressure measurement data of each oil well;
according to PVT data of each oil well, obtaining the ratio of the crude oil volume coefficient under the initial oil reservoir condition to the crude oil volume coefficient under the current stratum pressure;
and calculating the comprehensive elastic compression coefficient of the target stratum according to the linear intercept of the linear relation equation, the average stratum pressure maintenance degree value, and the ratio of the crude oil volume coefficient under the initial oil reservoir condition to the crude oil volume coefficient under the current stratum pressure.
2. The method of claim 1, wherein calculating the integrated elastic compression coefficient of the target formation from the linear intercept of the linear relationship equation, the average formation pressure retention level value, the ratio of the crude oil volume coefficient at the initial reservoir condition to the crude oil volume coefficient at the current formation pressure, comprises:
According to the formulaCalculating the comprehensive elastic compression coefficient c of the target stratum t ；
Wherein b is the linear intercept according to the linear relation equation,maintaining a degree value for the average formation pressure, B oi For the volume coefficient of crude oil under the initial oil reservoir condition, B o Is under the current formation pressureCrude oil volume coefficient.
3. The method of claim 1, wherein calculating a linear intercept of a linear relationship equation based on the product of the single well cumulative oil production and the single well control reservoir initial formation pressure for each well comprises:
taking the logarithm of the accumulated oil yield of a single well as a Y coordinate and the logarithm of the product of the initial formation pressure of the control reserve of the single well as an X coordinate, and drawing a linear relation diagram of the product of the accumulated oil yield of the single well and the initial formation pressure of the control reserve of the single well of each oil well;
and obtaining the linear intercept of the linear relation equation according to regression of the linear relation graph.
4. The method of claim 1, wherein calculating an average formation pressure retention level value based on the single well pressure measurement data for each well comprises:
acquiring initial formation pressure and current formation pressure of each oil well from the single well pressure measurement data;
Calculating a formation pressure retention degree value of each oil well according to the initial formation pressure and the current formation pressure;
and averaging the formation pressure maintaining degree of each oil well to obtain the average formation pressure maintaining degree value.
5. The method of claim 1, wherein the step of obtaining the ratio of the volumetric coefficient of crude oil at the initial reservoir condition to the volumetric coefficient of crude oil at the current formation pressure based on the PVT profile for each well comprises:
according to PVT data of each oil well, obtaining a crude oil volume coefficient under an initial oil reservoir condition and a crude oil volume coefficient under the current formation pressure;
dividing the crude oil volume coefficient under the initial oil reservoir condition by the crude oil volume coefficient under the current stratum pressure to obtain the ratio of the crude oil volume coefficient under the initial oil reservoir condition to the crude oil volume coefficient under the current stratum pressure.
6. The method of claim 1, wherein the obtaining an initial formation pressure product of a single well control reserve for each well comprises:
acquiring the initial stratum pressure of each oil well according to the single well pressure measurement data;
multiplying the initial formation pressure of each well by the single well control reserve to obtain the single well control reserve initial formation pressure product of each well.
7. The method of claim 2, wherein the formulaIs based on the principle of mass balance.
8. An ultra-deep broken solution reservoir stratum comprehensive elastic compression coefficient determining device, which is characterized by comprising:
the first calculation unit is used for calculating the single well control reserves of each oil well in the target stratum according to the fracture-cavity volume carving method;
the first acquisition unit is used for acquiring single well accumulated oil yield, single well control reserve initial stratum pressure product, single well pressure measurement data and PVT data of each oil well of the target stratum;
the second calculation unit is used for calculating linear intercept of the linear relation equation according to the product of the accumulated oil yield of the single well and the initial formation pressure of the single well control reserve of each oil well;
the third calculation unit is used for calculating an average stratum pressure retention degree value according to the single well pressure measurement data of each oil well;
the second acquisition unit is used for acquiring the ratio of the crude oil volume coefficient under the initial oil reservoir condition to the crude oil volume coefficient under the current stratum pressure according to the PVT data of each oil well;
and the fourth calculation unit is used for calculating the comprehensive elastic compression coefficient of the target stratum according to the linear intercept of the linear relation equation, the average stratum pressure maintenance degree value, and the ratio of the crude oil volume coefficient under the initial oil reservoir condition to the crude oil volume coefficient under the current stratum pressure.
9. A storage medium storing a computer program executable by one or more processors for implementing the method of determining the integrated elastic compressibility of an ultra-deep fracture fluid reservoir formation of any one of claims 1-7.
10. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, the memory and the processor are in communication connection with each other, and the computer program, when executed by the processor, performs the method for determining the comprehensive elastic compression coefficient of the ultra-deep fracture fluid reservoir stratum according to any one of claims 1 to 7.
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