CN110764541B - Method and device for determining particle composition of drilling fluid - Google Patents
Method and device for determining particle composition of drilling fluid Download PDFInfo
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- CN110764541B CN110764541B CN201810835582.3A CN201810835582A CN110764541B CN 110764541 B CN110764541 B CN 110764541B CN 201810835582 A CN201810835582 A CN 201810835582A CN 110764541 B CN110764541 B CN 110764541B
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Abstract
The invention provides a method and a device for determining the grain composition of drilling fluid. The invention provides a method for determining the particle composition of drilling fluid, which comprises the following steps: the method comprises the steps of obtaining first fracture distribution data of a target stratum outcrop rock sample, second fracture distribution data of a target stratum in adjacent well imaging data and third fracture distribution data of the target stratum in a similar stratum core of an adjacent well, and calculating particle grading rule data of a leaking stoppage formula in drilling fluid according to the first fracture distribution data, the second fracture distribution data and the third fracture distribution data. The invention provides a method for determining the grain composition of drilling fluid, which aims to optimize a drilling fluid plugging formula by comprehensively considering the cracks and joint distribution conditions of different scales, thereby greatly improving the aim and effectiveness of the plugging formula.
Description
Technical Field
The invention relates to the technical field of petroleum exploration, in particular to a method and a device for determining the grain composition of drilling fluid.
Background
At present, lost circulation can be classified into three categories, namely permeability loss, fractured loss and karst cave loss, according to the characteristics of the lost stratum, wherein the most complicated and difficult to solve is the fractured lost stratum.
In the prior art, the main research method for leak stoppage of fractured leakage stratum is started from two aspects of mechanics and chemistry. The mechanical aspect mainly analyzes the influence of the mechanical property of rock on the opening and the plugging of the lost formation cracks, the chemical aspect mainly starts from developing a novel plugging material and establishing a novel leak-proof plugging formula, and the formula suitable for the site is determined through indoor tests and site tests.
However, research finds that in the formula optimization process of the plugging process of the fractured formation, the particle grading rule in the fractured drilling fluid cannot be accurately controlled due to problems in the flow and the test method, so that the leakage formula and the method for treating the leakage are lack of pertinence.
Disclosure of Invention
The invention provides a method and a device for determining the particle composition of drilling fluid, which aim to solve the technical problem that the particle composition rule of fractured drilling fluid cannot be accurately determined in the prior art.
In a first aspect, the present invention provides a method for determining a drilling fluid particle size distribution, including:
obtaining first fracture distribution data of a target stratum outcrop rock sample, wherein the first fracture distribution data at least comprises: first fracture length distribution data, first fracture width distribution data, and first fracture density distribution data;
acquiring second fracture distribution data of the target stratum in the adjacent well imaging data, wherein the second fracture distribution fracture data at least comprises: second fracture length distribution data, second fracture width distribution data and second fracture density distribution data;
obtaining third fracture distribution data of the target stratum in the rock core of the similar stratum of the adjacent well, wherein the third fracture distribution data at least comprises: third fracture length distribution data, and third fracture density distribution data;
and calculating particle grading rule data of the leaking stoppage formula in the drilling fluid according to the first fracture distribution data, the second fracture distribution data and the third fracture distribution data, wherein the particle grading rule data comprise first volume data corresponding to first particles.
In one possible design, the calculating the particle grading law data of the lost circulation formulation in the drilling fluid from the first fracture distribution data, the second fracture distribution data, and the third fracture distribution data includes:
generating fracture distribution data according to the first fracture distribution data, the second fracture distribution data, and the third fracture distribution data, wherein the fracture distribution data includes: fracture length distribution data, fracture width distribution data and fracture density distribution data, the fracture length distribution data comprises: first fracture length distribution data, second fracture length distribution data, and third fracture length distribution data, the fracture width distribution data including: first fracture width distribution data, second fracture width distribution data, and third fracture width distribution data, the fracture density distribution data comprising: first fracture density distribution data, second fracture density distribution data, and third fracture density distribution data;
calculating a first number of first particles required for plugging a first fracture according to first fracture data corresponding to the first fracture, wherein the first fracture data comprises: a first fracture length, a first fracture density, and a first fracture width of the first fracture in the fracture distribution data;
calculating the first volume data of the first particles required by the drilling fluid from the first quantity and the individual volume of the first particles.
In one possible design, the calculating a first number of first particles required to plug a first fracture according to first fracture data corresponding to the first fracture includes:
according to the formula: m = (L × K)/D, calculating the first number, wherein M is the first number, L is the first fracture length, K is the first fracture density, and D is the first fracture width.
In one possible design, the first fracture distribution data includes: first sub-fracture distribution data and second sub-fracture distribution data;
wherein the first sub-fracture distribution data comprises at least: the fracture data acquisition system comprises first sub-fracture length distribution data, first sub-fracture width distribution data and first sub-fracture density distribution data, wherein the data in the first sub-fracture length distribution data and the first sub-fracture width distribution data are greater than or equal to a preset first unit length;
the second sub-fracture distribution data includes at least: and the second sub-crack length distribution data, the second sub-crack width distribution data and the second sub-crack density distribution data are obtained, wherein the data in the second sub-crack length distribution data and the second sub-crack width distribution data are less than or equal to a preset second unit length.
In one possible design, the second fracture distribution data has data between the first unit length and the preset second unit length.
In one possible design, the data in the third fracture distribution data is between the first unit length and the preset second unit length.
In a second aspect, the present invention also provides a device for determining the particle composition of a drilling fluid, comprising:
the acquisition module is used for acquiring first fracture distribution data of the outcrop rock sample of the target stratum, wherein the first fracture distribution data at least comprises: first fracture length distribution data, first fracture width distribution data, and first fracture density distribution data;
the acquisition module is further configured to acquire second fracture distribution data of the target formation in the adjacent well imaging data, where the second fracture distribution data at least includes: second fracture length distribution data, second fracture width distribution data, and second fracture density distribution data;
the acquisition module is further configured to acquire third fracture distribution data of the target formation in the adjacent well homogeneous formation core, where the third fracture distribution data at least includes: third fracture length distribution data, and third fracture density distribution data;
and the calculation module is used for calculating the particle grading rule data of the leaking stoppage formula in the drilling fluid according to the first fracture distribution data, the second fracture distribution data and the third fracture distribution data, wherein the particle grading rule data comprise first volume data corresponding to first particles.
In one possible design, the first fracture distribution data includes: first sub-fracture distribution data and second sub-fracture distribution data;
wherein the first sub-fracture distribution data comprises at least: the method comprises the following steps of obtaining first sub-crack length distribution data, first sub-crack width distribution data and first sub-crack density distribution data, wherein the data in the first sub-crack length distribution data and the first sub-crack width distribution data are larger than or equal to a preset first unit length;
the second sub-fracture distribution data includes at least: and the second sub-crack length distribution data, the second sub-crack width distribution data and the second sub-crack density distribution data are obtained, wherein the data in the second sub-crack length distribution data and the second sub-crack width distribution data are less than or equal to a preset second unit length.
In one possible design, the second fracture distribution data has data between the first unit length and the preset second unit length.
In one possible design, the data in the third fracture distribution data is between the first unit length and the preset second unit length.
According to the method and the device for determining the drilling fluid particle composition, the first fracture distribution data of the outcrop rock sample of the target stratum, the second fracture distribution data of the target stratum in the adjacent well imaging data and the third fracture distribution data of the target stratum in the rock core of the similar stratum of the adjacent well are obtained, and then the particle composition rule data of the leaking stoppage formula in the drilling fluid are calculated according to the obtained data, so that the leaking stoppage formula of the drilling fluid is optimized in a targeted manner by comprehensively considering the distribution conditions of fractures and joints of different scales, and the pertinence and the effectiveness of the leaking stoppage formula are greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flow chart of a drilling fluid particle composition determination method shown in accordance with an exemplary embodiment of the present invention;
FIG. 2a is a diagram illustrating the distribution of the width of the first sub-cracks in the embodiment shown in FIG. 1;
FIG. 2b is a graph of the first sub-crack length distribution in the embodiment of FIG. 1;
FIG. 2c is a graph of a first sub-fracture density distribution profile for the embodiment of FIG. 1;
FIG. 3a is a second sub-crack width distribution plot for the embodiment of FIG. 1;
FIG. 3b is a graph showing the second sub-fracture length distribution rule in the embodiment shown in FIG. 1;
FIG. 3c is a second sub-fracture density distribution plot for the embodiment of FIG. 1;
FIG. 4a is a second crack width distribution profile of the embodiment of FIG. 1;
FIG. 4b is a second crack length distribution plot for the embodiment of FIG. 1;
FIG. 4c is a second fracture density distribution plot for the embodiment of FIG. 1;
FIG. 5a is a third exemplary crack width distribution profile of the embodiment of FIG. 1;
FIG. 5b is a third crack length distribution plot for the embodiment of FIG. 1;
FIG. 5c is a third fracture density distribution plot for the embodiment of FIG. 1;
FIG. 6a is a graph showing the crack width distribution pattern in the embodiment of FIG. 1;
FIG. 6b is a graph of the crack length distribution in the embodiment of FIG. 1;
FIG. 6c is a graph of the crack density distribution in the embodiment of FIG. 1;
FIG. 7 is a schematic diagram of particle count calculation in the embodiment of FIG. 1;
FIG. 8 is a plot of the drilling fluid particle grading law in the embodiment of FIG. 1;
FIG. 9 is a schematic view of a leak stoppage instrument according to an exemplary embodiment of the present invention;
fig. 10 is a schematic structural diagram of a drilling fluid particle grading determination device according to an exemplary embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The technical solution of the present invention will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
FIG. 1 is a flow chart of a drilling fluid particle composition determination method shown in accordance with an exemplary embodiment of the present invention. As shown in fig. 1, the method for determining the particle composition of the drilling fluid according to the present embodiment includes:
Specifically, first fracture distribution data of the outcrop rock sample of the target stratum is obtained, and the first fracture distribution data at least comprises the following components: first fracture length distribution data, first fracture width distribution data, and first fracture density distribution data. Fig. 2a is a diagram of a distribution rule of a width of a first sub crack in the embodiment shown in fig. 1, fig. 2b is a diagram of a distribution rule of a length of the first sub crack in the embodiment shown in fig. 1, and fig. 2c is a diagram of a density distribution rule of the first sub crack in the embodiment shown in fig. 1. As shown in fig. 2 a-2 c, the characteristics of the cracks and joints in unit volume of the macroscopic level of the target horizon, such as width, length, density and the like, can be obtained by observing the outcrop rock sample of the target horizon in the field, and the distribution characteristics of the cracks and joints of the target horizon rock, such as length, width and density, can be drawn.
Wherein the first fracture distribution data comprises: first sub-fracture distribution data and second sub-fracture distribution data. Wherein the first sub-fracture distribution data at least comprises: the data in the first sub-crack length distribution data and the first sub-crack width distribution data are greater than or equal to a preset first unit length. The second sub-fracture distribution data includes at least: and the second sub-crack length distribution data, the second sub-crack width distribution data and the second sub-crack density distribution data are obtained, wherein the data in the second sub-crack length distribution data and the second sub-crack width distribution data are less than or equal to a preset second unit length.
It is to be understood that the crack size may be divided into a macro-scale crack, a meso-scale crack and a micro-scale crack by using the above-mentioned preset first unit length and second unit length, wherein if the crack size is greater than or equal to the preset first unit length, the crack may be considered as a macro-scale crack, and if the crack size is less than or equal to the preset second unit length, the crack may be considered as a micro-scale crack, and the crack therebetween may be considered as a meso-scale crack. In practical applications, the macro scale may refer to a scale that can be directly observed by human eyes, the micro scale refers to a scale that can be observed only by using a magnifying device, and the meso scale refers to a scale obtained through related imaging data or core data. In the embodiment, the drilling fluid plugging formula is optimized in a targeted manner by acquiring the fracture data in different scale ranges and then comprehensively considering the fractures in different scales and the joint distribution condition.
And 102, acquiring second fracture distribution data of the target stratum in the adjacent well imaging data.
Specifically, second fracture distribution data of the target stratum in the adjacent well imaging data is obtained, and the second fracture distribution fracture data at least comprises: second fracture length distribution data, second fracture width distribution data, and second fracture density distribution data. Fig. 3a is a diagram showing a distribution rule of the width of the second sub-cracks in the embodiment shown in fig. 1, fig. 3b is a diagram showing a distribution rule of the length of the second sub-cracks in the embodiment shown in fig. 1, and fig. 3c is a diagram showing a distribution rule of the density of the second sub-cracks in the embodiment shown in fig. 1. As shown in fig. 3 a-3 c, the adjacent well imaging data is identified and finely analyzed, the characteristics of the crack and the joint density, the length, the opening width and the like in the unit volume of the observation surface in the target layer are obtained, and the crack and the joint length, the joint width and the density distribution characteristics of the stratum rock of the target layer are drawn.
In one possible design, the data in the second fracture distribution data is between the first unit length and a preset second unit length.
And 103, acquiring third fracture distribution data of the target stratum in the similar stratum core of the adjacent well.
Specifically, third fracture distribution data of a target stratum in a rock core of a similar stratum of an adjacent well is obtained, wherein the third fracture distribution data at least comprises the following data: third fracture length distribution data, and third fracture density distribution data. FIG. 4a is a second crack width distribution plot in the embodiment of FIG. 1, and FIG. 4b is a second crack length distribution plot in the embodiment of FIG. 1; FIG. 4c is a second fracture density distribution plot of the embodiment of FIG. 1. As shown in fig. 4 a-4 c, the similar formation cores of adjacent wells may be collected, then the fracture and joint density, length, opening width and other characteristics in the unit volume of the observation surface in the target layer are obtained, and the distribution characteristics of the length, width and density parameters of lithology at different depths are drawn.
In one possible design, the data in the third fracture distribution data is between the first unit length and the preset second unit length.
And step 104, calculating the particle grading rule data of the leaking stoppage formula in the drilling fluid according to the first fracture distribution data, the second fracture distribution data and the third fracture distribution data.
Specifically, particle grading rule data of the leaking stoppage formula in the drilling fluid are calculated according to the first fracture distribution data, the second fracture distribution data and the third fracture distribution data, wherein the particle grading rule data comprise first volume data corresponding to the first particles.
In a possible implementation manner, fig. 6a is a crack width distribution rule diagram in the embodiment shown in fig. 1, fig. 6b is a crack length distribution rule diagram in the embodiment shown in fig. 1, and fig. 6c is a crack density distribution rule diagram in the embodiment shown in fig. 1. As shown in fig. 6 a-6 c, fracture distribution data may be generated from first, second, and third fracture distribution data, wherein the fracture distribution data includes: crack length distribution data, crack width distribution data and crack density distribution data, the crack length distribution data include: first fracture length distribution data, second fracture length distribution data and third fracture length distribution data, fracture width distribution data includes: first crack width distribution data, second crack width distribution data and third crack width distribution data, the crack density distribution data include: first fracture density distribution data, second fracture density distribution data, and third fracture density distribution data.
Figure 8 is a plot of the particle grading of the drilling fluid in the embodiment of figure 1. As shown in fig. 8, a first number of first particles required for plugging the first fracture is calculated according to first fracture data corresponding to the first fracture, where the first fracture data includes: a first fracture length, a first fracture density, and a first fracture width of the first fracture in the fracture distribution data. Finally, first volume data of the first particles required for the drilling fluid is calculated from the first number and the individual volume of the first particles. By analogy, the particle volume distribution condition required by plugging each crack in unit volume can be obtained.
Fig. 7 is a schematic diagram of the calculation of the number of particles in the embodiment shown in fig. 1. As shown in fig. 7, the specific calculation for the first number may be according to the formula: m = (L × K)/D, calculating the first number, where M is the first number, L is the first fracture length, K is the first fracture density, and D is the first fracture width.
In the embodiment, the first fracture distribution data of the outcrop rock sample of the target stratum, the second fracture distribution data of the target stratum in the adjacent well imaging data and the third fracture distribution data of the target stratum in the rock core of the similar stratum of the adjacent well are obtained, and then the particle grading rule data of the leaking stoppage formula in the drilling fluid are calculated according to the obtained data, so that the leaking stoppage formula of the drilling fluid is optimized in a targeted manner by comprehensively considering the distribution conditions of fractures and joints of different scales, and the pertinence and the effectiveness of the leaking stoppage formula are greatly improved.
In addition, in order to further verify the pertinence and effectiveness of the plugging formulation determined by the above method examples, it may also be tested. Fig. 10 is a schematic structural diagram of a drilling fluid particle composition determination device according to an exemplary embodiment of the present invention. As shown in fig. 10, the device is mainly composed of two parts, the first part is a pump source device for providing a pressure source for plugging test; the second part is a high-pressure plugging simulation test working barrel. The device mainly comprises the following parts, wherein a high-pressure working barrel provides a pressure working environment which can be sealed for the whole test, and a drilling fluid formula which is finished according to the method can be placed in the high-pressure working barrel.
Specifically, the leak stoppage instrument mainly comprises: the device comprises a screw cover 1, a working cylinder 2, a leak stoppage sample plate 3, a base support 4, a ball valve 5 and a pump source 6. The screw cover 1 is used for conveniently opening the working cylinder 2 and placing the leaking stoppage simulation sample disc 3 and drilling fluid after being opened, the upper side of the screw cover 1 is connected with the pump source 6 and is controlled by a valve, and the lower side of the screw cover 1 is connected with the working cylinder 2 through threads and a sealing ring. The working cylinder 2 is made of thick-wall corrosion-resistant stainless steel, a closed pressure space is provided for leak stoppage tests, the upper part of the pressure space is connected with the screw cover 1, the bottom of the pressure space is provided with a small hole and connected with the ball valve 5, and a leak stoppage sample disc 3 is placed at the upper part of the small hole. For the leaking stoppage sample tray 3, the leaking stoppage sample tray 3 is manufactured according to the statistical data about the cracks, and the cracks with various sizes which are consistent with the statistical characteristics of the cracks can be cut on the stainless steel leaking stoppage sample tray. And the base support 4 is used for supporting the working barrel 2. And the ball valve 5 is connected with the working barrel 2, and when the ball valve 5 is opened, a pressure difference can be established above and below the working barrel 2, so that the simulated cracks can be blocked by the plugging material under the action of the pressure difference.
By designing the plugging test mold matched with the crack and joint distribution, the real conditions of real cracks and textures are simulated, and the drilling fluid plugging formula can be subjected to targeted test, so that the obtained formula has a better plugging effect.
Fig. 10 is a schematic structural diagram of a drilling fluid particle composition determination device according to an exemplary embodiment of the present invention. As shown in fig. 10, the present embodiment provides a drilling fluid particle size distribution determining apparatus, including:
an obtaining module 201, configured to obtain first fracture distribution data of a target formation outcrop rock sample, where the first fracture distribution data at least includes: first fracture length distribution data, first fracture width distribution data and first fracture density distribution data;
the obtaining module 201 is further configured to obtain second fracture distribution data of the target formation in the adjacent well imaging data, where the second fracture distribution data at least includes: second fracture length distribution data, second fracture width distribution data, and second fracture density distribution data;
the obtaining module 201 is further configured to obtain third fracture distribution data of the target formation in the adjacent well homogeneous formation core, where the third fracture distribution data at least includes: third fracture length distribution data, and third fracture density distribution data;
a calculating module 202, configured to calculate, according to the first fracture distribution data, the second fracture distribution data, and the third fracture distribution data, particle grading rule data of the leaking stoppage formula in the drilling fluid, where the particle grading rule data includes first volume data corresponding to first particles.
In one possible design, the first fracture distribution data includes: first sub-fracture distribution data and second sub-fracture distribution data;
wherein the first sub-fracture distribution data comprises at least: the method comprises the following steps of obtaining first sub-crack length distribution data, first sub-crack width distribution data and first sub-crack density distribution data, wherein the data in the first sub-crack length distribution data and the first sub-crack width distribution data are larger than or equal to a preset first unit length;
the second sub-fracture distribution data includes at least: and the second sub-fracture length distribution data, the second sub-fracture width distribution data and the second sub-fracture density distribution data are obtained, wherein the data in the second sub-fracture length distribution data and the second sub-fracture width distribution data is less than or equal to a preset second unit length.
In one possible design, the second fracture distribution data has data between the first unit length and the preset second unit length.
In one possible design, the data in the third fracture distribution data is between the first unit length and the preset second unit length.
The drilling fluid particle composition determination device provided in the embodiment shown in fig. 10 may be used to execute the method provided in the embodiment shown in fig. 1, and the specific implementation and technical effects are similar and will not be described again here.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the spirit of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. A method of determining a drilling fluid particle composition, comprising:
obtaining first fracture distribution data of a target stratum outcrop rock sample, wherein the first fracture distribution data at least comprises: first fracture length distribution data, first fracture width distribution data, and first fracture density distribution data;
acquiring second fracture distribution data of the target stratum in the adjacent well imaging data, wherein the second fracture distribution fracture data at least comprises: second fracture length distribution data, second fracture width distribution data, and second fracture density distribution data;
obtaining third fracture distribution data of the target stratum in the rock core of the similar stratum of the adjacent well, wherein the third fracture distribution data at least comprises: third fracture length distribution data, and third fracture density distribution data;
calculating particle grading rule data of the leaking stoppage formula in the drilling fluid according to the first fracture distribution data, the second fracture distribution data and the third fracture distribution data, wherein the particle grading rule data comprise first volume data corresponding to first particles; calculating the particle grading rule data of the leaking stoppage formula in the drilling fluid according to the first fracture distribution data, the second fracture distribution data and the third fracture distribution data, wherein the calculating comprises the following steps:
generating fracture distribution data according to the first fracture distribution data, the second fracture distribution data, and the third fracture distribution data, wherein the fracture distribution data includes: fracture length distribution data, fracture width distribution data, and fracture density distribution data, the fracture length distribution data including: first fracture length distribution data, second fracture length distribution data, and third fracture length distribution data, the fracture width distribution data including: first fracture width distribution data, second fracture width distribution data, and third fracture width distribution data, the fracture density distribution data comprising: first fracture density distribution data, second fracture density distribution data, and third fracture density distribution data;
calculating a first number of first particles required for plugging a first fracture according to first fracture data corresponding to the first fracture, wherein the first fracture data comprises: a first fracture length, a first fracture density, and a first fracture width of the first fracture in the fracture distribution data;
calculating the first volume data of the first particles required for the drilling fluid according to the first quantity and the individual volume of the first particles; the calculating a first number of first particles required to plug the first fracture according to first fracture data corresponding to the first fracture includes:
according to the formula: m = (L × K)/D, calculating the first number, wherein M is the first number, L is the first fracture length, K is the first fracture density, and D is the first fracture width.
2. The method of claim 1, wherein the first fracture distribution data comprises: first sub-fracture distribution data and second sub-fracture distribution data;
wherein the first sub-fracture distribution data comprises at least: the method comprises the following steps of obtaining first sub-crack length distribution data, first sub-crack width distribution data and first sub-crack density distribution data, wherein the data in the first sub-crack length distribution data and the first sub-crack width distribution data are larger than or equal to a preset first unit length;
the second sub-fracture distribution data includes at least: and the second sub-crack length distribution data, the second sub-crack width distribution data and the second sub-crack density distribution data are obtained, wherein the data in the second sub-crack length distribution data and the second sub-crack width distribution data are less than or equal to a preset second unit length.
3. The method of claim 2, wherein the second fracture distribution data includes data between the first unit length and the predetermined second unit length.
4. The method of claim 3, wherein the third fracture distribution data has data between the first unit length and the predetermined second unit length.
5. A drilling fluid particle composition determination device, comprising:
the acquisition module is used for acquiring first fracture distribution data of the outcrop rock sample of the target stratum, wherein the first fracture distribution data at least comprises: first fracture length distribution data, first fracture width distribution data and first fracture density distribution data;
the obtaining module is further configured to obtain second fracture distribution data of the target formation in the adjacent well imaging data, where the second fracture distribution data at least includes: second fracture length distribution data, second fracture width distribution data, and second fracture density distribution data;
the acquisition module is further configured to acquire third fracture distribution data of the target formation in the rock core of the similar formation of the adjacent well, where the third fracture distribution data at least includes: third fracture length distribution data, and third fracture density distribution data;
the calculation module is used for calculating particle grading rule data of the leaking stoppage formula in the drilling fluid according to the first fracture distribution data, the second fracture distribution data and the third fracture distribution data, wherein the particle grading rule data comprise first volume data corresponding to first particles;
the calculation module is specifically configured to calculate, according to first fracture data corresponding to a first fracture, a first number of first particles required to plug the first fracture, where the first fracture data includes: a first fracture length, a first fracture density, and a first fracture width of the first fracture in the fracture distribution data;
calculating the first volume data of the first particles required by the drilling fluid from the first number and the individual volume of the first particles;
the calculation module is specifically configured to: m = (L × K)/D, calculating the first number, wherein M is the first number, L is the first fracture length, K is the first fracture density, and D is the first fracture width.
6. The apparatus of claim 5, wherein the first fracture distribution data comprises: first sub-fracture distribution data and second sub-fracture distribution data;
wherein the first sub-fracture distribution data comprises at least: the fracture data acquisition system comprises first sub-fracture length distribution data, first sub-fracture width distribution data and first sub-fracture density distribution data, wherein the data in the first sub-fracture length distribution data and the first sub-fracture width distribution data are greater than or equal to a preset first unit length;
the second sub-fracture distribution data includes at least: and the second sub-crack length distribution data, the second sub-crack width distribution data and the second sub-crack density distribution data are obtained, wherein the data in the second sub-crack length distribution data and the second sub-crack width distribution data are less than or equal to a preset second unit length.
7. The apparatus of claim 6, wherein the second fracture distribution data comprises data between the first unit length and the predetermined second unit length.
8. The apparatus of claim 7, wherein the third fracture distribution data comprises data between the first unit length and the predetermined second unit length.
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| CN201810835582.3A CN110764541B (en) | 2018-07-26 | 2018-07-26 | Method and device for determining particle composition of drilling fluid |
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| CN110764541B true CN110764541B (en) | 2023-04-07 |
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