CN112780237B

CN112780237B - Horizontal well segmentation method and device and computer storage medium

Info

Publication number: CN112780237B
Application number: CN201911097171.XA
Authority: CN
Inventors: 马辉运; 周长林; 李力; 陈伟华; 刘飞; 曾嵘; 曾冀; 李松; 李金穗; 叶颉枭; 杨林
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2019-11-11
Filing date: 2019-11-11
Publication date: 2023-01-10
Anticipated expiration: 2039-11-11
Also published as: CN112780237A

Abstract

The embodiment of the application discloses a horizontal well segmentation method and device and a computer storage medium, and belongs to the technical field of oil and gas field development. In the embodiment of the application, the reservoir is divided into a plurality of areas according to the porosity and the permeability of the reservoir in the research area, then an acid fracturing seepage geological model is obtained according to two areas with the maximum grade and the second maximum grade in the plurality of areas, a seepage barrier area in the simulation area is determined according to the acid fracturing seepage geological model and the acid fracturing fracture characteristic parameters of the research area, and the segmentation number and the segmentation position of the horizontal well to be segmented are determined according to the porosity, the permeability and the gas saturation of the reservoir corresponding to the horizontal well to be segmented in the simulation area and the research area. That is, in the process of segmenting the horizontal, the influence of the seepage barrier region on the acid fracturing is considered, so that the oil or the natural gas in the reservoir stratum can flow into the cracks formed after the acid fracturing, and the oil or the natural gas exploitation efficiency is improved.

Description

Horizontal well segmentation method and device and computer storage medium

Technical Field

The application relates to the technical field of oil and gas field development, in particular to a horizontal well segmentation method and device and a computer storage medium.

Background

In producing oil or gas in a reservoir through a horizontal well, the horizontal well traverses the reservoir. In order to extract oil or natural gas in a reservoir as much as possible, a horizontal well is segmented, each segmented well corresponds to a part of the reservoir, and then the part of the reservoir corresponding to each segmented well is subjected to acidizing and fracturing, so that the oil or natural gas in the reservoir can be extracted as much as possible.

In the related technology, when the horizontal well is segmented, the position of the enriched oil or natural gas in the reservoir is determined according to the seismic interpretation data, the drilling data, the logging data and the logging data of the horizontal well, and then the position of the enriched oil or natural gas is divided into the same segment.

However, some reservoirs are provided with seepage barrier regions at positions where oil or gas is enriched, and the seepage barrier regions can prevent the oil or gas in the reservoirs from flowing into fractures formed after acid fracturing, so that after the horizontal well is segmented according to the method, the flow of the oil or gas in the reservoirs is not facilitated, and the efficiency of oil or gas exploitation is affected.

Content of application

The application provides a horizontal well segmentation method, a horizontal well segmentation device and a computer storage medium, which can improve the efficiency of exploiting oil or natural gas. The technical scheme is as follows:

in one aspect, a horizontal well segmentation method is provided, and comprises the following steps:

dividing a reservoir into a plurality of regions according to the porosity and permeability of the reservoir in a research region, wherein each region in the plurality of regions corresponds to a grade, the grade of each region in the plurality of regions is inversely proportional to the porosity, and the grade and permeability of each region are inversely proportional to each other;

acquiring an acid fracturing seepage geological model according to two areas with the maximum grade and the second maximum grade in the plurality of areas, wherein the acid fracturing seepage geological model is used for indicating the geological condition of a simulation area, the simulation area comprises an area with the maximum grade and two areas with the second maximum grade, and the area with the maximum grade is distributed between the two areas with the second maximum grade;

determining a seepage barrier zone in the simulation zone according to the acid fracturing seepage geological model and acid fracturing fracture characteristic parameters of the research zone, wherein the acid fracturing fracture characteristic parameters are used for indicating the characteristics of fractures formed after acid fracturing on the research zone;

and determining the segmentation quantity and the segmentation position of the horizontal well to be segmented according to the porosity, the permeability and the gas saturation of the reservoir corresponding to the seepage barrier region of the simulation region and the horizontal well to be segmented in the research region.

Optionally, the obtaining an acid fracturing seepage geological model according to two regions with the largest grade and the second largest grade in the plurality of regions includes:

obtaining geological information of each of the two regions with the maximum grade and the second maximum grade, wherein the geological information of each region is used for indicating the geological condition of the corresponding region;

and acquiring an acid fracturing seepage geological model according to the geological information of each of the two regions with the maximum grade and the second maximum grade.

Optionally, the fracture characteristic parameters include fracture conductivity parameters and effective fracture length of the fracture;

determining a seepage barrier zone in the simulation area according to the acid fracturing seepage geological model and the acid fracturing fracture characteristic parameters of the research area, wherein the determination comprises the following steps:

simulating different well-direction lengths of the region with the maximum grade in the acid fracturing seepage geological model to obtain regions with different well-direction lengths;

for a first zone in zones with different well-direction lengths, determining a reservoir exploitation degree corresponding to the first zone according to the fracture conductivity parameter and the effective fracture length of the fracture, wherein the reservoir exploitation degree is used for indicating the stability of a reservoir, and the first zone is any one of the zones with different well-direction lengths;

and determining a corresponding region of the regions of different well-directional lengths, in which the reservoir pay-out is within the reservoir pay-out threshold range, as a seepage barrier region in the research region.

Optionally, the determining the reservoir exploitation degree corresponding to the first region according to the fracture conductivity parameter and the effective fracture length of the fracture includes:

determining the pressure wave length of a high-grade region in the acid fracturing seepage geological model according to the fracture conductivity parameter, the effective fracture length of the fracture and the well direction length of the first region;

and determining the ratio of the pressure wave length to the total well direction length of the graded second-order large area as the reservoir exploitation degree corresponding to the first area.

Optionally, the determining the number of segments and the segment positions of the horizontal well to be segmented according to the porosity, permeability and gas saturation of the reservoir through which the seepage barrier region of the research area and the horizontal well to be segmented penetrate includes:

determining a well depth distribution schematic diagram of the porosity, the permeability and the gas saturation along with the horizontal well to be segmented according to the porosity, the permeability and the gas saturation of a reservoir corresponding to the horizontal well to be segmented;

dividing the horizontal well to be segmented into a plurality of well sections according to geological information of a stratum corresponding to the horizontal well to be segmented, and a well depth distribution schematic diagram of the porosity, the permeability and the gas saturation along with the horizontal well to be segmented, and determining an initial position of each well section in the plurality of well sections;

for a first interval of the plurality of intervals, if the first interval does not include a zone of the plurality of zones of the highest rank, determining an initial location of the first interval as a staged location for the first interval, the first interval being any one of the plurality of intervals;

if the first well section comprises the area with the highest grade in the plurality of areas, determining the well direction length of the area with the highest grade in the plurality of areas, and determining the subsection position of the first well section according to the well direction length of the area with the highest grade in the plurality of areas, the seepage barrier area and the initial position of the first well section.

Optionally, the determining the segmented location of the first interval according to the uphole length of the highest ranked one of the plurality of zones, the seepage barrier zone, and the initial location of the first interval comprises:

determining an initial position of the first interval as a staging position for the first interval if a uphole length of a highest ranked one of the plurality of zones is less than a uphole length of the seepage barrier zone;

if the well-direction length of the area with the highest grade in the plurality of areas is greater than or equal to the well-direction length of the seepage barrier area and less than 2 times of the well-direction length of the seepage barrier area, determining the well-direction middle position of the area with the highest grade in the plurality of areas as the starting position of the subsection position of the first well section, and determining another position in the starting position of the first well section as the ending position in the subsection position of the first well section;

determining a uphole location of a highest ranked one of the plurality of zones as a staging location for the first interval if a length of the highest ranked one of the plurality of zones is greater than or equal to 2 times a length of the seepage barrier zone.

In another aspect, a horizontal well sectioning device is provided, which includes:

the device comprises a dividing module, a storage module and a control module, wherein the dividing module is used for dividing a reservoir into a plurality of regions according to the porosity and the permeability of the reservoir in a research region, each region in the plurality of regions corresponds to a grade, the grade of each region in the plurality of regions is in inverse proportion to the porosity, and the grade of each region is in inverse proportion to the permeability;

the acquisition module is used for acquiring an acid fracturing seepage geological model according to two areas with the maximum grade and the second-order grade in the plurality of areas, wherein the acid fracturing seepage geological model is used for indicating the geological condition of a simulation area, the simulation area comprises an area with the maximum grade and two areas with the second-order grade, and the area with the maximum grade is distributed between the two areas with the second-order grade;

a first determination module, configured to determine a seepage barrier zone in the simulation area according to the acid fracturing seepage geological model and an acid fracturing fracture characteristic parameter of the research area, where the acid fracturing fracture characteristic parameter is used to indicate a characteristic of a fracture formed after acid fracturing on the research area;

and the second determination module is used for determining the subsection number and the subsection position of the horizontal well to be subsection according to the porosity, the permeability and the gas saturation of the seepage barrier area of the simulation area and the reservoir corresponding to the horizontal well to be subsection in the research area.

Optionally, the obtaining module includes:

a first obtaining unit, configured to obtain geological information of each of the two regions with the largest rank and the second largest rank, where the geological information of each region is used to indicate a geological condition of the corresponding region;

and the second acquisition unit is used for acquiring the acid fracturing seepage geological model according to the geological information of each of the two areas with the maximum grade and the second maximum grade.

the first determining module includes:

the simulation unit is used for simulating the region with the maximum grade in the acid fracturing seepage geological model in different well-direction lengths to obtain regions with different well-direction lengths;

the first determination unit is used for determining the reservoir exploitation degree corresponding to a first region in the regions with different well lengths according to the fracture conductivity parameter and the effective fracture length of the fracture, wherein the reservoir exploitation degree is used for indicating the stability of the reservoir, and the first region is any one of the regions with different well lengths;

and the second determining unit is used for determining a corresponding region with the reservoir exploitation degree within the reservoir exploitation degree threshold range in the regions with different well-direction lengths as a seepage barrier region in the research region.

Optionally, the first determining unit includes:

the first determining subunit is used for determining the pressure wave length of a high-grade region in the acid fracturing seepage geological model according to the fracture conductivity parameter, the effective fracture length and the well direction length of the first region;

and the second determining subunit is used for determining the ratio of the pressure wave sum length to the total well direction length of the secondary large-grade area as the reservoir exploitation degree corresponding to the first area.

Optionally, the second determining module includes:

the third determination unit is used for determining a schematic distribution diagram of the porosity, the permeability and the gas saturation along with the well depth of the horizontal well to be segmented according to the porosity, the permeability and the gas saturation of a reservoir layer corresponding to the horizontal well to be segmented;

the fourth determining unit is used for dividing the horizontal well to be segmented into a plurality of well sections according to geological information of a stratum corresponding to the horizontal well to be segmented, and a well depth distribution schematic diagram of the porosity, the permeability and the gas saturation along with the horizontal well to be segmented, and determining the initial position of each well section in the plurality of well sections;

a fifth determining unit, configured to determine, for a first interval of the plurality of intervals, an initial position of the first interval as a segmented position of the first interval if the first interval does not include a region of the plurality of regions having a largest rank, the first interval being any one of the plurality of intervals;

a sixth determining unit, configured to determine, if the first wellbore section includes a region with a highest rank in the multiple regions, a downhole length of the region with the highest rank in the multiple regions, and determine a segmentation position of the first wellbore section according to the downhole length of the region with the highest rank in the multiple regions, the seepage barrier region, and an initial position of the first wellbore section.

Optionally, the sixth determining unit includes:

a third determining subunit, configured to determine an initial position of the first interval as a staging position of the first interval if a downhole length of a highest-ranked one of the plurality of zones is less than a downhole length of the seepage barrier zone;

a fourth determining subunit, configured to determine, if the well-direction length of the area with the highest rank in the plurality of areas is greater than or equal to the well-direction length of the seepage barrier area and less than 2 times the well-direction length of the seepage barrier area, the well-direction middle position of the area with the highest rank in the plurality of areas as the start position of the subsection position of the first well section, and determine another position of the start position of the first well section as the end position of the subsection position of the first well section;

a fifth determining subunit, configured to determine a downhole location of a highest-grade one of the plurality of zones as a staging location of the first interval if a length of the highest-grade one of the plurality of zones is greater than or equal to 2 times a length of the seepage barrier zone.

In another aspect, an apparatus for horizontal well segmentation is provided, the apparatus comprising:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to perform the steps of any of the methods of the first aspect described above.

In another aspect, a computer-readable storage medium is provided, having instructions stored thereon, which when executed by a processor, implement the steps of any of the methods described above.

In another aspect, a computer program product comprising instructions is provided, which when run on a computer, causes the computer to perform the steps of any of the methods described above.

The beneficial effects that technical scheme that this application provided brought can include at least:

according to the porosity and permeability of a reservoir in a research area, the reservoir is divided into a plurality of areas, then an acid fracturing seepage geological model is obtained according to two areas with the maximum grade and the second maximum grade in the plurality of areas, a seepage barrier area in a simulation area is determined according to the acid fracturing seepage geological model and acid fracturing fracture characteristic parameters of the research area, and the number of subsections and the subsection position of a horizontal well to be subsected are determined according to the porosity, permeability and gas saturation of the reservoir corresponding to the horizontal well to be subsected in the simulation area and the research area. That is, in the embodiment of the present application, in the process of segmenting the horizontal zone, the influence of the seepage barrier zone on the acid fracturing is considered, that is, the influence of the seepage barrier zone on the flow of the oil or the natural gas in the reservoir is considered, so that the segmentation of the horizontal well is more accurate, the oil or the natural gas in the reservoir can better flow into the fracture formed after the acid fracturing, and the efficiency of extracting the oil or the natural gas is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a flow chart of a method for horizontal well segmentation according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of a simulated acid-fracturing seepage geological model provided by an embodiment of the present application;

FIG. 3 is a simulation diagram of a simulated well-direction IV-class region with a length of 40m according to an embodiment of the present application;

FIG. 4 is a schematic simulation diagram of a simulated well-directional IV-class region with a length of 30m according to an embodiment of the present application;

FIG. 5 is a simulation diagram of a simulated well-direction IV-class region with a length of 20m according to an embodiment of the present application;

FIG. 6 is a simulation diagram of a simulated well-direction IV-class region with a length of 10m according to an embodiment of the present application;

FIG. 7 is a schematic illustration of the porosity, permeability and gas saturation distribution with well depth for a horizontal well according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of an apparatus for horizontal well segmentation according to an embodiment of the present disclosure;

fig. 9 is a schematic structural diagram of a terminal according to an embodiment of the present application.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Fig. 1 is a flowchart of a horizontal well sectioning method provided in an embodiment of the present application. As shown in fig. 1, the horizontal well sectioning method comprises the following steps:

step 101: according to the porosity and the permeability of a reservoir in a research area, the reservoir is divided into a plurality of areas, each area in the plurality of areas corresponds to one grade, the grade of each area in the plurality of areas is in inverse proportion to the porosity, and the grade and the permeability of each area are in inverse proportion to each other.

Since the porosity and permeability of different regions of the reservoir in the study area are different, the reservoir may be divided into a plurality of regions, each corresponding to a grade, according to porosity and permeability.

In some embodiments, the grade of each zone may be determined in such a way that the grade is inversely proportional to the porosity and the grade is inversely proportional to the permeability. For example, table 1 provides a corresponding relationship between porosity, permeability and reservoir grade for the examples of the present application. As shown in table 1, when a region has a porosity of 12% or more and a permeability of 10mD (millidarcy), the region in the reservoir is rated i. And when the porosity of a certain area is less than 12 percent and is more than or equal to 6 percent, the permeability is less than 10mD and is more than 0.1mD, the grade of the area in the reservoir is II. A zone in the reservoir is rated iii when the porosity of the zone is less than 6%, 1.5% or greater, the permeability is less than 0.1mD, and greater than 0.001 mD. When a region has a porosity of less than 1.5% and a permeability of less than 0.001mD, the region in the reservoir is rated IV.

TABLE 1

Reservoir rating	Porosity, is%	Permeability, mD
			Ⅰ	≥12％	≥10.0
Ⅱ	[6％，12％)	[0.1，10)
			Ⅲ	[1.5％，6％)	[0.001，0.1)
Ⅳ	<1.5％	<0.001

The correspondence relationship between the porosity, the permeability and the reservoir grade shown in table 1 is only for illustration and does not limit the correspondence relationship between the porosity, the permeability and the reservoir grade through the examples of the present application.

Step 102: and acquiring an acid fracturing seepage geological model according to two areas with the maximum grade and the second maximum grade in the plurality of areas, wherein the acid fracturing seepage geological model is used for indicating the geological condition of the simulation area, the simulation area comprises an area with the maximum grade and two areas with the maximum grade, and the area with the maximum grade is distributed between the two areas with the maximum grade.

For regions of lesser porosity and permeability in the reservoir, such regions may block the flow of fluid from the reservoir through such regions, i.e., such regions may form permeability barrier zones, thereby affecting horizontal well segments. Based on step 101, the grade and the porosity of each of the plurality of regions are inversely proportional, and the grade and the permeability of each of the plurality of regions are inversely proportional, so that the acid fracturing seepage geological model can be obtained according to the region with the largest grade and the two regions with the second largest grade, so as to determine the seepage barrier region through step 103.

In some embodiments, the obtaining of the acid fracturing seepage geological model according to the two regions with the largest and the second largest grades in the plurality of regions may be: and acquiring geological information of each of the two regions with the maximum grade and the second maximum grade, wherein the geological information of each region is used for indicating the geological condition of the corresponding region, and acquiring the acid fracturing seepage geological model according to the geological information of each of the two regions with the maximum grade and the second maximum grade.

Wherein the geological information can be pre-stored by the constructor. Geological information may include, but is not limited to, fluid high pressure properties, formation pressure, rock type, porosity, permeability, gas saturation, and the like.

In addition, according to the geological information of each of the two regions with the maximum grade and the second maximum grade, the implementation mode of obtaining the acid fracturing seepage geological model can be as follows: and inputting the geological information of each of the two areas with the maximum grade and the second maximum grade into simulation software, establishing an acid fracturing seepage geological model by the simulation software according to the geological information of the two areas with the maximum grade and the second maximum grade, and then obtaining the acid fracturing seepage geological model from the simulation software.

The simulation software may be Eclipse software, but may also be other software, such as abbes software, and the embodiment of the present application is not limited herein.

For example, the ranks in multiple regions of the reservoir are I, II, III, and IV in that order. And simulating according to the combination of III + IV + III, namely deploying two III-level regions on two sides of the IV-level region to simulate the worst seepage condition in a reservoir, inputting geological information of the IV-level region and the two III-level regions into Eclipse software, establishing an acid fracturing seepage geological model in the form of III-level + IV-level + III-level by the Eclipse software, and then acquiring the acid fracturing seepage geological model from the Eclipse software.

In addition, in step 102, the region with the largest grade is distributed between two regions with the next largest grade, i.e., the porosity and permeability of two regions on both sides of the region with the smallest porosity and permeability are both smaller than those of the other regions. That is, one of the two regions with poor permeability is placed with the worst permeability to simulate the worst permeability conditions in the reservoir, thereby facilitating subsequent determination of fluid flow conditions in the reservoir at the worst permeability conditions. Additionally, the resistance of the area to fluid flow at the worst seepage conditions may also be referred to as a seepage barrier effect.

Step 103: and determining a seepage barrier zone in the simulation area according to the acid fracturing seepage geological model and the acid fracturing fracture characteristic parameters of the research area, wherein the acid fracturing fracture characteristic parameters are used for indicating the characteristics of the fracture formed after the acid fracturing of the research area.

The fracture pressing characteristic parameters can include fracture conductivity parameters and effective fracture length. It should be noted that the downhole length refers to the length in the direction in which the well extends into the formation.

In some embodiments, the implementation of the seepage barrier zone in the simulation zone is determined from the acid fracturing seepage geological model and the acid fracturing fracture characteristic parameters of the study zone: and for a first area in the areas with different well-direction lengths, determining the reservoir exploitation degree corresponding to the first area according to the fracture conductivity parameter and the effective fracture length of the fracture, and determining the area, in which the reservoir exploitation degree corresponding to the area with different well-direction lengths is within the reservoir exploitation degree threshold range, as the seepage barrier area in the research area. Wherein the reservoir volume is indicative of the stability of the reservoir, and the first zone is any one of zones of different axial lengths.

The implementation mode for determining the reservoir exploitation degree corresponding to the first region according to the fracture conductivity parameter and the effective fracture length of the fracture can be as follows: and determining the pressure wave length of a region with a large grade in the acid fracturing seepage geological model according to the fracture conductivity parameter, the effective fracture length of the fracture and the well direction length of the first region, and determining the ratio of the pressure wave length to the total well direction length of the region with the large grade as the reservoir utilization degree corresponding to the first region.

In some embodiments, determining the pressure sweep length of the medium-grade zone in the acid fracturing seepage geological model according to the fracture conductivity parameter, the effective fracture length of the fracture and the well direction length of the first zone may be implemented by: inputting the fracture conductivity parameter, the effective fracture length and the well direction length of the first region into simulation software, and then obtaining the pressure wave length of a high-grade region in the acid fracturing seepage geological model from the simulation software. The pressure swept length refers to the length of the pressure front advancing in the reservoir during the pressure transmission in the reservoir.

For example, in the acid fracturing seepage geological model in the form of 'III grade + IV grade + III grade', fracture conductivity parameters and effective fracture length are implanted in a III grade area, and then the distribution of the pressure field of the IV grade area under different well length conditions in 5 years is simulated according to the length range of the well length of the IV grade area in the research area. And determining the reservoir mobilization level according to the following formula:

in the above formula: e represents the reservoir mobilization degree in%; l is _s Representing the pressure wave length in m in a III-level reservoir without acid fracturing fracture deployment; l represents the total length of the stage iii reservoir without acid fracturing deployed in units of m.

For example, the reservoir mobilization level threshold may range from 0-30%. If the degree of reservoir pay E for a zone of a certain uphole length, as determined by the above-described method, is between 0 and 30%, the zone of the uphole length may be determined as a permeability barrier zone. If the reservoir production degree E of the region of the well-length is 30-60% or more than 60%, and the influence of the well-length on the gas supply of the acid fracturing fracture is not obvious, the region of the well-length does not need to be determined as a seepage barrier region.

It should be noted that since the porosity and permeability of the iv-staged region are the smallest of all regions in the reservoir, the iv-staged region may block pressure from propagating in the reservoir when pressure is propagating in the reservoir, and therefore, pressure may not be transmitted through the iv-staged region, which may act as a barrier, blocking pressure and also blocking the flow of fluids in the reservoir. Therefore, when the seepage barrier zone is determined, the swept length of the pressure in the III-class area is determined according to the influence of IV-class areas with different well-direction lengths on pressure conduction, and further the reservoir exploitation degree is determined.

Step 104: and determining the segmentation quantity and the segmentation position of the horizontal well to be segmented according to the porosity, the permeability and the gas saturation of the reservoir corresponding to the horizontal well to be segmented in the simulation area and the research area.

In some embodiments, the implementation of step 104 may be: determining a well depth distribution schematic diagram of the porosity, the permeability and the gas saturation along with the horizontal well to be segmented according to the porosity, the permeability and the gas saturation of a reservoir corresponding to the horizontal well to be segmented; dividing the horizontal well to be segmented into a plurality of well sections according to geological information of a stratum corresponding to the horizontal well to be segmented, and a well depth distribution schematic diagram of porosity, permeability and gas saturation along with the horizontal well to be segmented, and determining an initial position of each well section in the plurality of well sections; for a first well section in the plurality of well sections, if the first well section does not comprise the region with the highest grade in the plurality of regions, determining the initial position of the first well section as the segmented position of the first well section; and if the first well section comprises a region with the highest grade in the plurality of regions, determining the well direction length of the region with the highest grade in the plurality of regions, and determining the sectional position of the first well section according to the well direction length of the region with the highest grade in the plurality of regions, the seepage barrier region and the initial position of the first well section. Wherein the first interval is any one of a plurality of intervals.

The porosity, permeability and gas saturation of the reservoir at different depths are different, and one depth position corresponds to one porosity value, one permeability value and one gas saturation value, so that a well depth distribution schematic diagram of the porosity, permeability and gas saturation along with the horizontal well to be segmented can be determined in advance according to the porosity, permeability and gas saturation corresponding to the different depth positions of the horizontal well to be segmented.

In addition, when the horizontal well to be segmented is divided into a plurality of well sections, the horizontal well to be segmented can be segmented according to the geology of the reservoir, and specific reference can be made to the related technology, which is not described herein again. The segmentation can also be carried out according to the actual engineering problem in the horizontal well. Certainly, the reservoir in the horizontal well can be segmented according to the seismic information, the drilling information, the logging information and the logging information of the reservoir, the oil-gas enrichment well section concentration, the reservoir physical property close concentration and the principle that the length of a single section is less than 200m, and the segmentation quantity is determined. The embodiments of the present application are not limited herein.

Due to the limitations of conventional tools, when a horizontal well is sectioned, the number of sections is usually 7 or less.

Additionally, in some embodiments, determining the staging location for the first interval based on the uphole length of the most graded of the plurality of zones, the permeability barrier zone, and the initial location of the first interval may be by: if the well length of the region with the largest grade in the multiple regions is smaller than the well length of the seepage barrier region, determining the initial position of the first well section as the subsection position of the first well section; if the well-direction length of the area with the maximum grade in the plurality of areas is greater than or equal to the well-direction length of the seepage barrier area and is less than 2 times of the well-direction length of the seepage barrier area, determining the well-direction middle position of the area with the maximum grade in the plurality of areas as the starting position of the subsection position of the first well section, and determining another position in the starting position of the first well section as the ending position in the subsection position of the first well section; determining a downhole location of a highest-grade one of the plurality of zones as a staging location for the first interval if the length of the highest-grade one of the plurality of zones is greater than or equal to 2 times the length of the seepage barrier zone.

For example, the area with the largest grade is defined with a well-direction length L, and the seepage barrier area has a well-direction length L _sb When L is less than L _sb And then, the initial position of the first well section is the subsection position of the first well section, and at the moment, the influence of the seepage barrier area is not considered. When L is _sb ≤L＜2L _sb At this time, the middle position of the well direction of the area with the maximum grade is determined as the starting position of the sectional position of the first well section, namely, the influence of the seepage barrier area needs to be considered, at this time, the area with the maximum grade is equivalent to the seepage barrier area, and one sectional position of the first well section is adjusted to the middle position of the seepage barrier area. When L is more than or equal to 2L _sb And determining the well location of the region with the maximum grade as the segmented position of the first well section, namely considering the seepage barrier region at the moment, and independently dividing the seepage barrier region into one segment, wherein for the segment, the segment can not be reconstructed when the reservoir is reconstructed.

The horizontal well segmentation method provided by the embodiment of the application is verified by combining the practical example as follows:

the drilling completion depth of a certain carbonate horizontal gas well is 6196m, the horizontal section length is 964.34m, the acid fracturing target layer section is 5310 m-6196 m, and industrial productivity is obtained through segmented acid fracturing modification.

The zone in the well is divided into 4 grades of I, II, III and IV according to the porosity and permeability of the reservoir in the well. In ranking the zones in the reservoir, the ranking may be done according to table 1. Geological information in the well is then acquired.

Table 2 is a data table of a reservoir provided in an embodiment of the present invention. As shown in Table 2, the relative gas density was 0.626, the viscosity of water was 0.64cp, and the density of formation water was 1.05g/cm ³ The gas reservoir temperature is 153.7 ℃, the volume coefficient of formation water is 1.077, the gas reservoir pressure is 56.9MPa, the permeability of a III-level region is 0.09, the length of an acid-etched fracture is 60m, the permeability of an IV-level region is 0.0008mD, the height of the acid-etched fracture is 20m, the porosity of the III-level region is 3.0%, the width of the acid-etched fracture is 5mm, the porosity of the IV-level region is 0.88%, the conductivity of the acid-etched fracture is 2.5D.cm, the gas saturation of the III-level region is 91.8%, and the gas saturation of the IV-level region is 8.0%.

TABLE 2

Relative density of gas	0.626	Viscosity of water	0.64cp
				Water density of stratum	1.05g/cm ³	Temperature of gas reservoir	153.7℃
Volume coefficient of formation water	1.077	Pressure of gas reservoir	56.9MPa
				Class III reservoir permeability	0.09mD	Length of acid-etched crack	60m
Type IV reservoir permeability	0.0008mD	Height of acid-etched crack	20m
				Class III reservoir porosity	3.0％	Width of acid-etched crack	5mm
Class IV reservoir porosity	0.88％	Acid-etched fracture conductivity	2.5D.cm
				Class III reservoir gas saturation	91.8％	Gas saturation of IV-type reservoir	8.0％

It should be noted that the gas relative density refers to the density of gas in the reservoir relative to air. Acid-eroded fractures refer to fractures formed in a reservoir by an acid fluid when the reservoir is subjected to acid fracturing. The viscosity of the water refers to the viscosity of the formation water.

After the geological information in the well is acquired, the geological information is input into Eclipse software, and as shown in fig. 2, an acid fracturing and seepage geological model in the form of III grade + IV grade + III grade is built through the software. And the length of the acid-etched fracture, the height of the acid-etched fracture, the width of the acid-etched fracture and the flow conductivity of the acid-etched fracture are implanted into the established acid fracturing seepage geological model.

According to the distribution range of the well direction length of the IV-level area in the reservoir of the work area where the well is located on the horizontal section, as shown in fig. 3, the simulated well direction length of the IV-level area is 40m, and the corresponding reservoir exploitation degree is 5%. As shown in fig. 4, the simulated iv zone has a well length of 30m and a corresponding reservoir production rate of 10%. As shown in fig. 5, the simulated iv zone has a well length of 20m and a corresponding reservoir production rate of 55%. As shown in fig. 6, the simulated iv zone has a well length of 10m and a corresponding reservoir production rate of 88%. In this case, the threshold value of the reservoir production rate can be 0-30%, and when the well length of the IV grade region on the horizontal section is more than 30m, the seepage barrier zone needs to be considered during the segmentation.

And determining the number and the position of the segments according to the porosity, the permeability and the gas saturation distribution of the well segment to be segmented in the well and the combination of the seepage barrier area.

Based on the porosity, permeability and gas saturation distribution of the well, the regional standards in the reservoir and the definition of the permeability barrier zones, as shown in figure 7, the distribution of porosity, permeability and gas saturation with well depth is shown schematically in figure 7, from which it can be derived that the well has two distinct permeability barrier zones, each 58m and 46m in length. And (4) the reservoirs with high gas-bearing property and similar physical properties are concentrated into one section by considering the distribution and the well length of the seepage barrier area. And then determining the section position at the middle position of the seepage barrier area, and finally, the number of the sections of the well section is 5. Are 5300-5450m,5450-5600m,5600-5800m,5800-5950m and 5950-6150m respectively.

In addition, after the subsection is determined, the well can be segmented and mined by adopting a mode of 'packer + sliding sleeve'. Final test yield after acid fracturing 103.96 × 10 ⁴ m ³ And d. And comparing the test yield of the well after acid fracturing with the yield of the horizontal well which does not adopt the technical scheme of the application, wherein the test yield of the well is 2 times of the yield of the horizontal well which does not adopt the technical scheme of the application.

In the embodiment of the application, the reservoir is divided into a plurality of areas according to the porosity and the permeability of the reservoir in the research area, then an acid fracturing seepage geological model is obtained according to two areas with the maximum grade and the second maximum grade in the plurality of areas, a seepage barrier area in the simulation area is determined according to the acid fracturing seepage geological model and the acid fracturing fracture characteristic parameters of the research area, and the segmentation number and the segmentation position of the horizontal well to be segmented are determined according to the porosity, the permeability and the gas saturation of the reservoir corresponding to the horizontal well to be segmented in the simulation area and the research area. That is, in the embodiment of the present application, in the process of segmenting the horizontal, the influence of the seepage barrier region on the acid fracturing is considered, that is, the influence of the seepage barrier region on the flow of the oil or the natural gas in the reservoir is considered, so that the segmentation of the horizontal well is more accurate, the oil or the natural gas in the reservoir can better flow into the fracture formed after the acid fracturing, and the efficiency of extracting the oil or the natural gas is improved.

Fig. 8 is a schematic view of an apparatus for horizontal well segmentation according to an embodiment of the present disclosure. As shown in fig. 8, the horizontal well sectioning apparatus 800 includes:

a dividing module 801, configured to divide the reservoir into multiple regions according to the porosity and permeability of the reservoir in the research region, where each of the multiple regions corresponds to one grade, the grade and the porosity of each of the multiple regions are inversely proportional, and the grade and the permeability of each of the multiple regions are inversely proportional;

an obtaining module 802, configured to obtain an acid fracturing seepage geological model according to two largest-level and second-largest areas in the multiple areas, where the acid fracturing seepage geological model is used to indicate a geological condition of a simulation area, the simulation area includes one largest-level area and two second-largest areas, and the largest-level area is distributed between the two second-largest areas;

a first determining module 803, configured to determine a seepage barrier region in the simulation region according to the acid fracturing seepage geological model and an acid fracturing fracture characteristic parameter of the research region, where the acid fracturing fracture characteristic parameter is used to indicate a characteristic of a fracture formed after acid fracturing of the research region;

and the second determining module 804 is used for determining the segmentation number and the segmentation position of the horizontal well to be segmented according to the porosity, the permeability and the gas saturation of the reservoir corresponding to the horizontal well to be segmented in the simulation area and the research area.

Optionally, the obtaining module 802 includes:

the device comprises a first acquisition unit, a second acquisition unit and a third acquisition unit, wherein the first acquisition unit is used for acquiring geological information of each of two areas with the maximum grade and the second maximum grade, and the geological information of each area is used for indicating the geological condition of the corresponding area;

and the second acquisition unit is used for acquiring the acid fracturing seepage geological model according to the geological information of each of the two regions with the maximum grade and the second maximum grade.

the first determination module 803 includes:

the simulation unit is used for simulating different well-direction lengths of the region with the maximum grade in the acid fracturing seepage geological model to obtain regions with different well-direction lengths;

the first determining unit is used for determining reservoir mobility degrees corresponding to a first area in areas with different well-direction lengths according to fracture conductivity parameters and effective fracture lengths of fractures, wherein the reservoir mobility degrees are used for indicating the stability of a reservoir, and the first area is any one of the areas with different well-direction lengths;

and the second determining unit is used for determining the corresponding region with the reservoir exploitation degree within the reservoir exploitation degree threshold range in the regions with different well-direction lengths as the seepage barrier region in the research region.

Optionally, the first determining unit includes:

the first determining subunit is used for determining the pressure wave length of a medium-grade region in the acid fracturing seepage geological model according to the fracture conductivity parameter, the effective fracture length of the fracture and the well direction length of the first region;

and the second determining subunit is used for determining the ratio of the pressure wave sum length to the total well direction length of the second-order large area as the reservoir exploitation degree corresponding to the first area.

Optionally, the second determining module 804 includes:

the third determining unit is used for determining a schematic distribution diagram of the porosity, the permeability and the gas saturation along with the well depth of the horizontal well to be segmented according to the porosity, the permeability and the gas saturation of a reservoir corresponding to the horizontal well to be segmented;

the fourth determining unit is used for dividing the horizontal well to be segmented into a plurality of well sections according to geological information of a stratum corresponding to the horizontal well to be segmented and a well depth distribution schematic diagram of porosity, permeability and gas saturation along with the horizontal well to be segmented, and determining the initial position of each well section in the plurality of well sections;

a fifth determining unit, configured to, for a first well section in the multiple well sections, determine an initial position of the first well section as a segmented position of the first well section if the first well section does not include a region with a largest rank in the multiple regions, where the first well section is any one of the multiple well sections;

and the sixth determining unit is used for determining the well direction length of the area with the maximum grade in the plurality of areas if the first well section comprises the area with the maximum grade in the plurality of areas, and determining the subsection position of the first well section according to the well direction length of the area with the maximum grade in the plurality of areas, the seepage barrier area and the initial position of the first well section.

Optionally, the sixth determining unit includes:

a third determining subunit, configured to determine the initial position of the first well section as a segmented position of the first well section if the well length of the region with the largest rank in the plurality of regions is smaller than the well length of the seepage barrier region;

a fourth determining subunit, configured to determine, if the axial length of the area with the largest grade in the plurality of areas is greater than or equal to the axial length of the seepage barrier area and is less than 2 times of the axial length of the seepage barrier area, the axial middle position of the area with the largest grade in the plurality of areas as the start position of the segmentation position of the first well section, and determine another position in the start position of the first well section as the end position in the segmentation position of the first well section;

a fifth determining subunit, configured to determine, as the segmentation location of the first well section, a well location of a zone of the plurality of zones of the largest rank if a length of the zone of the plurality of zones of the largest rank is greater than or equal to 2 times a length of the seepage barrier zone.

It should be noted that: when the horizontal well is segmented, the horizontal well segmentation device provided by the embodiment is only exemplified by the division of the functional modules, and in practical application, the function distribution can be completed by different functional modules according to needs, that is, the internal structure of the equipment is divided into different functional modules, so as to complete all or part of the functions described above. In addition, the horizontal well segmenting device provided by the embodiment and the horizontal well segmenting method embodiment belong to the same concept, and specific implementation processes are detailed in the method embodiment and are not repeated.

Fig. 9 is a schematic structural diagram of a terminal according to an embodiment of the present application. The terminal 900 may be: a smart phone, a tablet computer, an MP3 player (Moving Picture Experts Group Audio Layer III, motion video Experts compression standard Audio Layer 3), an MP4 player (Moving Picture Experts Group Audio Layer IV, motion video Experts compression standard Audio Layer 4), a notebook computer, or a desktop computer. Terminal 900 may also be referred to by other names such as user equipment, portable terminals, laptop terminals, desktop terminals, etc.

In general, terminal 900 includes: a processor 901 and a memory 902.

Processor 901 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and so forth. The processor 901 may be implemented in at least one hardware form of a DSP (Digital Signal Processing), an FPGA (Field-Programmable Gate Array), and a PLA (Programmable Logic Array). The processor 901 may also include a main processor and a coprocessor, where the main processor is a processor for Processing data in an awake state, and is also called a Central Processing Unit (CPU); a coprocessor is a low power processor for processing data in a standby state. In some embodiments, the processor 901 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content required to be displayed on the display screen. In some embodiments, the processor 901 may further include an AI (Artificial Intelligence) processor for processing computing operations related to machine learning.

Memory 902 may include one or more computer-readable storage media, which may be non-transitory. Memory 902 may also include high-speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In some embodiments, a non-transitory computer readable storage medium in memory 902 is used to store at least one instruction for execution by processor 901 to implement the method of horizontal well segmentation provided by the method embodiments herein.

In some embodiments, terminal 900 can also optionally include: a peripheral interface 903 and at least one peripheral. The processor 901, memory 902, and peripheral interface 903 may be connected by buses or signal lines. Various peripheral devices may be connected to the peripheral interface 903 via a bus, signal line, or circuit board. Specifically, the peripheral device includes: at least one of a radio frequency circuit 904, a touch display screen 905, a camera assembly 909, an audio circuit 907, a positioning assembly 908, and a power supply 909.

The peripheral interface 903 may be used to connect at least one peripheral related to I/O (Input/Output) to the processor 901 and the memory 902. In some embodiments, the processor 901, memory 902, and peripheral interface 903 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the processor 901, the memory 902 and the peripheral interface 903 may be implemented on a separate chip or circuit board, which is not limited by this embodiment.

The Radio Frequency circuit 904 is used for receiving and transmitting RF (Radio Frequency) signals, also called electromagnetic signals. The radio frequency circuitry 904 communicates with communication networks and other communication devices via electromagnetic signals. The radio frequency circuit 904 converts an electrical signal into an electromagnetic signal to transmit, or converts a received electromagnetic signal into an electrical signal. Optionally, the radio frequency circuit 904 comprises: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a subscriber identity module card, and so forth. The radio frequency circuit 904 may communicate with other terminals via at least one wireless communication protocol. The wireless communication protocols include, but are not limited to: metropolitan area networks, various generation mobile communication networks (2G, 3G, 4G, and 5G), wireless local area networks, and/or WiFi (Wireless Fidelity) networks. In some embodiments, the radio frequency circuit 904 may also include NFC (Near Field Communication) related circuits, which are not limited in this application.

The display screen 905 is used to display a UI (User Interface). The UI may include graphics, text, icons, video, and any combination thereof. When the display screen 905 is a touch display screen, the display screen 905 also has the ability to capture touch signals on or over the surface of the display screen 905. The touch signal may be input to the processor 901 as a control signal for processing. At this point, the display 905 may also be used to provide virtual buttons and/or a virtual keyboard, also referred to as soft buttons and/or a soft keyboard. In some embodiments, the display 905 may be one, providing the front panel of the terminal 900; in other embodiments, the number of the display panels 905 may be at least two, and each of the display panels is disposed on a different surface of the terminal 900 or is in a foldable design; in still other embodiments, the display 905 may be a flexible display disposed on a curved surface or on a folded surface of the terminal 900. Even more, the display screen 905 may be arranged in a non-rectangular irregular figure, i.e. a shaped screen. The Display panel 905 can be made of LCD (Liquid Crystal Display), OLED (Organic Light-Emitting Diode), and other materials.

The camera assembly 906 is used to capture images or video. Optionally, camera assembly 906 includes a front camera and a rear camera. Generally, a front camera is disposed at a front panel of the terminal, and a rear camera is disposed at a rear surface of the terminal. In some embodiments, the number of the rear cameras is at least two, and each rear camera is any one of a main camera, a depth-of-field camera, a wide-angle camera and a telephoto camera, so that the main camera and the depth-of-field camera are fused to realize a background blurring function, the main camera and the wide-angle camera are fused to realize panoramic shooting and a VR (Virtual Reality) shooting function or other fusion shooting functions. In some embodiments, camera assembly 906 may also include a flash. The flash lamp can be a single-color temperature flash lamp or a double-color temperature flash lamp. The double-color-temperature flash lamp is a combination of a warm-light flash lamp and a cold-light flash lamp, and can be used for light compensation at different color temperatures.

Audio circuit 907 may include a microphone and a speaker. The microphone is used for collecting sound waves of a user and the environment, converting the sound waves into electric signals, and inputting the electric signals to the processor 901 for processing, or inputting the electric signals to the radio frequency circuit 904 for realizing voice communication. For stereo sound acquisition or noise reduction purposes, the microphones may be multiple and disposed at different locations of the terminal 900. The microphone may also be an array microphone or an omni-directional pick-up microphone. The speaker is used to convert electrical signals from the processor 901 or the radio frequency circuit 904 into sound waves. The loudspeaker can be a traditional film loudspeaker or a piezoelectric ceramic loudspeaker. When the speaker is a piezoelectric ceramic speaker, the speaker can be used for purposes such as converting an electric signal into a sound wave audible to a human being, or converting an electric signal into a sound wave inaudible to a human being to measure a distance. In some embodiments, audio circuit 907 may also include a headphone jack.

The positioning component 908 is used to locate the current geographic Location of the terminal 900 for navigation or LBS (Location Based Service). The Positioning component 908 may be a Positioning component based on the GPS (Global Positioning System) in the united states, the beidou System in china, the graves System in russia, or the galileo System in the european union.

Power supply 909 is used to provide power to the various components in terminal 900. The power source 909 may be alternating current, direct current, disposable or rechargeable. When power source 909 comprises a rechargeable battery, the rechargeable battery may support wired or wireless charging. The rechargeable battery may also be used to support fast charge technology.

In some embodiments, terminal 900 can also include one or more sensors 910. The one or more sensors 910 include, but are not limited to: acceleration sensor 911, gyro sensor 912, pressure sensor 913, fingerprint sensor 914, optical sensor 915, and proximity sensor 916.

The acceleration sensor 911 can detect the magnitude of acceleration in three coordinate axes of the coordinate system established with the terminal 900. For example, the acceleration sensor 911 may be used to detect the components of the gravitational acceleration in three coordinate axes. The processor 901 can control the touch display 905 to display the user interface in a landscape view or a portrait view according to the gravitational acceleration signal collected by the acceleration sensor 911. The acceleration sensor 911 may also be used for acquisition of motion data of a game or a user.

The gyro sensor 912 may detect a body direction and a rotation angle of the terminal 900, and the gyro sensor 912 may cooperate with the acceleration sensor 911 to acquire a 3D motion of the user on the terminal 900. The processor 901 can implement the following functions according to the data collected by the gyro sensor 912: motion sensing (such as changing the UI according to a user's tilting operation), image stabilization while shooting, game control, and inertial navigation.

Pressure sensors 913 may be disposed on the side bezel of terminal 900 and/or underneath touch display 905. When the pressure sensor 913 is disposed on the side frame of the terminal 900, the user's holding signal of the terminal 900 may be detected, and the processor 901 performs left-right hand recognition or shortcut operation according to the holding signal collected by the pressure sensor 913. When the pressure sensor 913 is disposed at a lower layer of the touch display 905, the processor 901 controls the operability control on the UI interface according to the pressure operation of the user on the touch display 905. The operability control comprises at least one of a button control, a scroll bar control, an icon control, and a menu control.

The fingerprint sensor 914 is used for collecting a fingerprint of the user, and the processor 901 identifies the user according to the fingerprint collected by the fingerprint sensor 914, or the fingerprint sensor 914 identifies the user according to the collected fingerprint. Upon recognizing that the user's identity is a trusted identity, processor 901 authorizes the user to perform relevant sensitive operations including unlocking the screen, viewing encrypted information, downloading software, paying, and changing settings, etc. The fingerprint sensor 914 may be disposed on the front, back, or side of the terminal 900. When a physical key or vendor Logo is provided on the terminal 900, the fingerprint sensor 914 may be integrated with the physical key or vendor Logo.

The optical sensor 915 is used to collect ambient light intensity. In one embodiment, the processor 901 may control the display brightness of the touch display 905 based on the ambient light intensity collected by the optical sensor 915. Specifically, when the ambient light intensity is high, the display brightness of the touch display screen 905 is increased; when the ambient light intensity is low, the display brightness of the touch display screen 905 is turned down. In another embodiment, the processor 901 can also dynamically adjust the shooting parameters of the camera assembly 906 according to the ambient light intensity collected by the optical sensor 915.

A proximity sensor 916, also known as a distance sensor, is typically provided on the front panel of the terminal 900. The proximity sensor 916 is used to collect the distance between the user and the front face of the terminal 900. In one embodiment, when the proximity sensor 916 detects that the distance between the user and the front face of the terminal 900 gradually decreases, the processor 901 controls the touch display 905 to switch from the bright screen state to the dark screen state; when the proximity sensor 916 detects that the distance between the user and the front surface of the terminal 900 gradually becomes larger, the processor 901 controls the touch display 905 to switch from the breath screen state to the bright screen state.

Those skilled in the art will appreciate that the configuration shown in fig. 9 is not limiting to terminal 900 and may include more or fewer components than shown, or some components may be combined, or a different arrangement of components may be used.

Embodiments of the present application further provide a non-transitory computer-readable storage medium, where instructions in the storage medium, when executed by a processor of a terminal, enable the terminal to perform the method for horizontal well segmentation provided in the embodiment shown in fig. 1.

Embodiments of the present application further provide a computer program product containing instructions, which when run on a computer, causes the computer to perform the method for horizontal well segmentation provided in the embodiment shown in fig. 1.

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

In summary, the present application is only a preferred embodiment and is not intended to be limited by the scope of the present application, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method of horizontal well segmentation, comprising:

acquiring an acid fracturing seepage geological model according to two areas with the maximum grade and the second-order grade in the plurality of areas, wherein the acid fracturing seepage geological model is used for indicating the geological condition of a simulation area, the simulation area comprises an area with the maximum grade and two areas with the second-order grade, and the area with the maximum grade is distributed between the two areas with the second-order grade;

determining the segmentation quantity and the segmentation position of the horizontal well to be segmented according to the porosity, the permeability and the gas saturation of a reservoir corresponding to the horizontal well to be segmented in the simulation area and the research area;

the acid fracturing fracture characteristic parameters comprise fracture conductivity parameters and effective fracture length;

2. The method of horizontal well segmentation according to claim 1, wherein the obtaining of the acid fracturing seepage flow geological model according to the two zones of the plurality of zones of the greatest grade and the second greatest grade comprises:

acquiring geological information of each of the two regions with the maximum grade and the second maximum grade, wherein the geological information of each region is used for indicating the geological condition of the corresponding region;

3. The method for horizontal well segmentation according to claim 1, wherein the determining the reservoir mobilization degree corresponding to the first zone according to the fracture conductivity parameter and the effective fracture length of the fracture comprises:

4. The horizontal well segmentation method according to claim 1, wherein the determining of the number and the location of the segments of the horizontal well to be segmented according to the porosity, permeability and gas saturation of the permeability barrier zone of the study area and the reservoir through which the horizontal well to be segmented passes comprises:

5. The method of horizontal well segmentation of claim 4 wherein said determining a segmentation location for the first interval based on a uphole length of a highest ranked one of the plurality of zones, the seepage barrier zone, and an initial location of the first interval comprises:

6. A horizontal well sectioning device, comprising:

the reservoir is divided into a plurality of regions according to the porosity and the permeability of the reservoir in a research region, each region in the plurality of regions corresponds to one grade, the grade and the porosity of each region in the plurality of regions are in inverse proportion, and the grade and the permeability of each region are in inverse proportion;

the second determining module is used for determining the subsection number and the subsection position of the horizontal well to be subsection according to the porosity, the permeability and the gas saturation of a reservoir layer corresponding to the seepage barrier area of the simulation area and the horizontal well to be subsection in the research area;

the first determining module comprises:

7. The horizontal well subsection apparatus of claim 6, wherein the acquisition module comprises:

the first acquisition unit is used for acquiring geological information of each of the two areas with the maximum grade and the second maximum grade, and the geological information of each area is used for indicating the geological condition of the corresponding area;

8. The horizontal well subsection apparatus according to claim 6, wherein the first determining unit comprises:

9. The horizontal well segmentation apparatus of claim 6, wherein the second determination module comprises:

a sixth determining unit, configured to determine, if the first wellbore section includes a region with a highest rank in the plurality of regions, a downhole length of the region with the highest rank in the plurality of regions, and determine, according to the downhole length of the region with the highest rank in the plurality of regions, the seepage barrier region, and an initial position of the first wellbore section, a segmented position of the first wellbore section.

10. The horizontal well subsection apparatus according to claim 9, wherein the sixth determining unit comprises:

a third determining subunit, configured to determine an initial position of the first interval as a block position of the first interval if a downhole length of a zone of the plurality of zones with a largest rank is smaller than a downhole length of the seepage barrier zone;

a fourth determining subunit, configured to determine, if the well-directional length of the highest-ranking one of the multiple regions is greater than or equal to the well-directional length of the seepage barrier zone and less than 2 times the well-directional length of the seepage barrier zone, the well-directional intermediate position of the highest-ranking one of the multiple regions as the start position of the subsection position of the first well section, and determine another position of the start position of the first well section as the end position in the subsection position of the first well section;

11. An apparatus for horizontal well segmentation, the apparatus comprising:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to perform the steps of any one of the methods of claim 1 to claim 5.

12. A computer readable storage medium having stored thereon instructions which, when executed by a processor, carry out the steps of any of the methods of claims 1 to 5.