CN114526045B

CN114526045B - Horizontal well energizing method and device and computer readable storage medium

Info

Publication number: CN114526045B
Application number: CN202011319079.6A
Authority: CN
Inventors: 田福春; 构小婷; 廖兴松; 李东平; 付大其; 赵玉东; 贾云鹏; 张胜传; 邵力飞; 郝桂宪; 秦飞翔; 刘学伟; 闫阳; 杨立永
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2020-11-23
Filing date: 2020-11-23
Publication date: 2023-10-27
Anticipated expiration: 2040-11-23
Also published as: CN114526045A

Abstract

The embodiment of the application discloses a horizontal well energizing method, a horizontal well energizing device and a computer readable storage medium, belonging to the field of oil and gas reservoir development. In the embodiment of the application, the sectional distance of the horizontal well is determined by considering the corresponding relation between the permeability and the radius of the easy-flow area, so that displacement can be formed among different sections of the horizontal well, the stratum energy can be supplemented in each section of the horizontal well by adopting a fracturing and energy storage alternate construction mode, the water flooding effect is formed in a target layer, the post-fracturing stable production time is improved, and the productivity is also improved.

Description

Horizontal well energizing method and device and computer readable storage medium

Technical Field

The embodiment of the application relates to the field of oil and gas reservoir development, in particular to a horizontal well energizing method, a horizontal well energizing device and a computer readable storage medium.

Background

With the continuous deepening of the depth of oil field exploration and development, the low-permeability and ultra-low-permeability reservoirs have higher and higher duty ratio, and the oil and gas reservoirs are mainly developed horizontally at present, namely, a horizontal well is constructed for oil and gas exploitation.

In the related art, because the hypotonic and ultra hypotonic reservoirs have no energy replenishment, fracturing fluids are relied upon to replenish energy to produce hydrocarbons. That is, in the related art, a large amount of fracturing fluid is pressed into the stratum by adopting a large-scale fracturing process so as to be injected into the horizontal well, the fracturing fluid is not returned immediately after the injection, the well is stopped for a long time, and the well is opened for production after the oil-water is subjected to imbibition replacement.

Because the process is to exert the function of supplementing stratum energy by the fracturing fluid, the fluid quantity is large, and the fracturing fluid has great damage to the stratum in the process of flushing after the fracturing fluid is pressed. In addition, if the soaking time is short, the dialysis replacement effect is poor, the productivity is low, and if the soaking time is long, the productivity is not generated in the soaking time, and the productivity construction is greatly influenced. Therefore, a new solution is needed to improve the productivity of hypotonic and ultra hypotonic reservoirs.

Disclosure of Invention

The embodiment of the application provides a horizontal well energizing method, a horizontal well energizing device and a computer readable storage medium, which can improve the productivity of a hypotonic and ultra-hypotonic reservoir. The technical scheme is as follows:

in one aspect, a method of horizontal well stimulation is provided, the method comprising:

determining the sectional distance of a horizontal well in a target layer according to the permeability of the target layer, the length of a perforation section and the corresponding relation between the permeability and the radius of a flowable region;

dividing the horizontal well into a plurality of sections to be constructed according to the sectional intervals of the horizontal well;

and carrying out alternate construction of fracturing and energy storage on the multiple sections to be constructed.

Optionally, the determining the segment interval of the horizontal well in the target layer according to the permeability and the perforation section length of the target layer and the corresponding relation between the permeability and the radius of the easy flow area includes:

Determining the radius of the easy-flow area of the target layer according to the permeability of the target layer and the corresponding relation between the permeability and the radius of the easy-flow area;

and determining the segment spacing of the horizontal well according to the radius of the easy-flow area and the length of the perforation segment of the target layer.

Optionally, the determining the segment spacing of the horizontal well according to the radius of the easy flow area and the length of the perforation segment includes:

dividing the horizontal well into one or more perforation segments according to perforation positions corresponding to dessert segments in a target layer;

and determining the corresponding segmentation distance of the corresponding perforation segments according to the radius of the easy-flow area and the perforation segment length of each perforation segment in the one or more perforation segments.

Optionally, before determining the segment spacing of the horizontal well in the target layer according to the permeability and the perforation section length of the target layer and the correspondence between the permeability and the radius of the easy-flow area, the method further comprises:

and determining perforation positions corresponding to dessert sections in the target layer according to the logging comprehensive data and the logging comprehensive data of the target layer, wherein the dessert sections comprise the plurality of sections to be constructed.

Optionally, the plurality of to-be-applied sections include a plurality of fracturing sections and a plurality of energizing sections, the plurality of fracturing sections are odd sections of the plurality of to-be-applied sections, the plurality of energizing sections are even sections of the plurality of to-be-applied sections, or the plurality of fracturing sections are even sections of the plurality of to-be-applied sections, the plurality of energizing sections are odd sections of the plurality of to-be-applied sections;

The alternately constructing the fracturing and energy storage of the plurality of sections to be constructed comprises the following steps:

selecting one to-be-constructed section from the plurality of to-be-constructed sections in turn according to the construction sequence until the following operations are performed on each to-be-constructed section of the plurality of to-be-constructed sections:

if the selected section to be subjected to fracturing is a fracturing section, perforating and fracturing construction are carried out on the selected fracturing section according to the perforating position corresponding to the selected fracturing section and the fracturing fluid injection amount;

if the selected section to be constructed is an energy increasing section, perforating and energy storage construction is carried out on the selected energy increasing section according to the perforating position and the energy increasing liquid injection amount corresponding to the selected energy increasing section.

Optionally, before the fracturing and energy storage alternate construction is performed on the multiple sections to be constructed, the method further comprises:

determining the fracturing fluid injection amount corresponding to each fracturing segment according to the physical properties of the perforation segment corresponding to each fracturing segment in the plurality of fracturing segments;

and determining the injection amount of the energizing liquid corresponding to each energizing section according to the physical properties of the perforating section corresponding to each energizing section in the plurality of energizing sections.

Optionally, the perforating and energy storage construction is performed on the selected energy increasing section according to the perforating position and the energy increasing liquid injection amount corresponding to the selected energy increasing section, including:

Perforating the selected energy increasing section according to the perforation position corresponding to the selected energy increasing section;

and injecting the energizing liquid into the perforated energizing section according to the energizing liquid injection amount of the selected energizing section, wherein the energizing liquid comprises slickwater and a surfactant.

In another aspect, there is provided a horizontal well energizing apparatus, the apparatus comprising:

the first determining module is used for determining the segment spacing of the horizontal well in the target layer according to the permeability of the target layer, the length of the perforation section and the corresponding relation between the permeability and the radius of the easy-flow area;

the segmentation module is used for dividing the horizontal well into a plurality of sections to be constructed according to the segmentation intervals of the horizontal well;

and the execution module is used for carrying out alternate construction of fracturing and energy storage on the plurality of sections to be constructed.

Optionally, the first determining module includes:

the first determining submodule is used for determining the radius of the easy-flow area of the target layer according to the permeability of the target layer and the corresponding relation between the permeability and the radius of the easy-flow area;

and the second determining submodule is used for determining the segment spacing of the horizontal well according to the radius of the easy-flow zone and the length of the perforating segment of the target layer.

Optionally, the second determining submodule is configured to:

Optionally, the apparatus further comprises:

and the second determining module is used for determining perforation positions corresponding to dessert sections in the target layer according to the logging comprehensive data and the logging comprehensive data of the target layer, wherein the dessert sections comprise the plurality of sections to be constructed.

the execution module comprises:

a selecting sub-module, configured to sequentially select one to-be-constructed section from the plurality of to-be-constructed sections according to a construction sequence, until the following operations are performed on each to-be-constructed section of the plurality of to-be-constructed sections:

The first execution submodule is used for carrying out perforation and fracturing construction on the selected fracturing segment according to the perforation position and the fracturing fluid injection amount corresponding to the selected fracturing segment if the selected fracturing segment is the fracturing segment;

and the second execution submodule is used for carrying out perforation and energy storage construction on the selected energy increasing section according to the perforation position and the energy increasing liquid injection amount corresponding to the selected energy increasing section if the selected energy increasing section is the energy increasing section.

Optionally, the execution module further includes:

the third determining submodule is used for determining the fracturing fluid injection amount corresponding to each fracturing segment according to the physical properties of the perforation segment corresponding to each fracturing segment in the plurality of fracturing segments;

and the fourth determination submodule is used for determining the injection quantity of the energizing liquid corresponding to the corresponding energizing section according to the physical property of the perforating section corresponding to each energizing section in the plurality of energizing sections.

Optionally, the second execution submodule is configured to:

In another aspect, a computer device is provided, where the computer device includes a processor, a communication interface, a memory, and a communication bus, where the processor, the communication interface, and the memory complete communication with each other through the communication bus, where the memory is used to store a computer program, and where the processor is used to execute the program stored on the memory, so as to implement the steps of the horizontal well power-up method described above.

In another aspect, a computer readable storage medium is provided, in which a computer program is stored, which when executed by a processor, implements the steps of the horizontal well energizing method described above.

In another aspect, there is provided a computer program product containing instructions which, when run on a computer, cause the computer to perform the steps of the horizontal well stimulation method described above.

The technical scheme provided by the embodiment of the application at least has the following beneficial effects:

in the embodiment of the application, the sectional distance of the horizontal well is determined by considering the corresponding relation between the permeability and the radius of the easy-flow area, so that displacement can be formed among different sections of the horizontal well, the stratum energy can be supplemented in each section of the horizontal well by adopting a fracturing and energy storage alternate construction mode, the water flooding effect is formed in a target layer, the post-fracturing stable production time is improved, and the productivity is also improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a flow chart of a horizontal well energizing method provided by an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a horizontal well energizing apparatus according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a computer device according to an embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the following detailed description of the embodiments of the present application will be given with reference to the accompanying drawings.

The horizontal well energizing method provided by the embodiment of the application is explained in detail below.

Fig. 1 is a flowchart of a horizontal well energizing method according to an embodiment of the present application. Referring to fig. 1, the method includes the following steps.

Step 101: and determining the sectional distance of the horizontal well in the target layer according to the permeability of the target layer, the length of the perforation section and the corresponding relation between the permeability and the radius of the easy-flowing area.

In the embodiment of the application, the low-permeability and ultra-low-permeability reservoir is researched, and a horizontal well is constructed in a target layer of a research area for oil and gas exploitation. The sectional distance of the horizontal well in the target layer influences the subsequent imbibition effect and displacement effect and influences the capacity construction, and the radius of the easy-flow area and the length of the perforation section in the target layer are factors which need to be considered in the scheme for sectioning the horizontal well, so that the sectional distance of the horizontal well in the target layer is determined according to the permeability of the target layer, the length of the perforation section and the corresponding relation of the permeability and the radius of the easy-flow area in the scheme.

In the embodiment of the application, the corresponding relation between the permeability and the radius of the easy-flowing area is determined and stored in advance according to the physical properties of the reservoir layer in the area where the target layer is located, and the corresponding relation between the permeability of different areas and different reservoir layers and the radius of the easy-flowing area is different.

In the embodiment of the application, under the condition that the permeability and perforation section length of the target layer and the corresponding relation between the permeability and the radius of the easy flow area are known, the realization mode of determining the segment spacing of the horizontal well in the target layer is as follows: and determining the radius of the easy-flow zone of the target layer according to the permeability of the target layer and the corresponding relation between the permeability and the radius of the easy-flow zone, and determining the segment spacing of the horizontal well according to the radius of the easy-flow zone and the length of the perforation segment of the target layer.

Table 1 shows the correspondence between the permeability and the radius of the easy-flow area provided by the embodiment of the application. As shown in table 1, when the permeability of the objective layer is 1.75mD (millidarcy) or less, the radius of the easy-flow region of the objective layer is 6.7 m, when the permeability of the objective layer is greater than 1.75mD and less than or equal to 5.5mD, the radius of the easy-flow region of the objective layer is 12.5 m, when the permeability of the objective layer is greater than 5.5mD and less than or equal to 9mD, the radius of the easy-flow region of the objective layer is 19 m, when the permeability of the objective layer is greater than 9mD and less than or equal to 15mD, the radius of the easy-flow region of the objective layer is 25 m, when the permeability of the objective layer is greater than 15mD and less than or equal to 35mD, the radius of the easy-flow region of the objective layer is 38 m, and when the permeability of the objective layer is greater than 35mD, the radius of the easy-flow region of the objective layer is 51 m.

TABLE 1

Permeability mD	≤1.75	(1.75，5.5]	(5.5，9]	(9，15]	(15，35]	>35
							Radius of easy flow area, meter	6.7	12.5	19	25	38	51

The permeability versus radius of the zone of interest shown in table 1 above is for illustration only, table 1 is applicable to low permeability, ultra low permeability reservoirs in one or some areas of investigation, and table 1 is not limiting of the embodiments of the application per se. In addition, it should be noted that, in the embodiment of the present application, the permeability of the target layer may refer to the average permeability of the region where the target layer is located.

Illustratively, assuming that the permeability of the target layer is 3mD, the radius of the easy-flow region of the target layer may be determined to be 12.5 meters according to the correspondence of the permeability and the radius of the easy-flow region shown in table 1.

In an embodiment of the application, the reservoir physical properties of the stored destination layer include the permeability of the destination layer. The perforation length of the target layer is pre-stored, the perforation length of the target layer is an empirically set value, for example, the perforation length of the target layer is pre-empirically set and stored to be 10 meters.

Alternatively, the perforation segment length of the destination layer is a value determined based on the perforation location corresponding to the dessert segment in the destination layer. In one implementation, the horizontal well is divided into one or more perforation segments according to perforation locations corresponding to dessert segments in the destination layer, each perforation segment including a plurality of perforation locations, each perforation segment corresponding to a perforation segment length, which may refer to a length between a first perforation location and a last perforation location in the corresponding perforation segment. Optionally, the perforation segment length of the target layer is an average value of perforation segment lengths corresponding to the one or more perforation segments, and the average value is used as the perforation segment length of the target layer. Or, the perforation section length corresponding to the perforation section or the perforation sections is used as the perforation section length of the target layer.

The dessert section and the perforation position corresponding to the dessert section in the target layer are determined according to the logging comprehensive data and the logging comprehensive data of the target layer. That is, before determining the segment spacing of the horizontal well in the target layer according to the permeability and perforation segment length of the target layer and the corresponding relation between the permeability and the radius of the easy-flow zone, determining the perforation position corresponding to the dessert segment in the target layer, that is, prioritizing the dessert segment and determining the perforation position according to the logging comprehensive data and the logging comprehensive data of the target layer.

In the embodiment of the application, after the radius of the easy-flow area and the length of the perforation section are determined, the segment spacing of the horizontal well is determined according to the radius of the easy-flow area and the length of the perforation section.

From the foregoing, it can be seen that the perforation segment length of the target layer is a value stored in advance, or an average value of perforation segment lengths corresponding to one or more perforation segments, in which case, the perforation segment length is added with twice the radius of the easy-flowing area to obtain the segment spacing of the horizontal well, that is, the average segment of the horizontal well.

Illustratively, assuming a zone radius of the destination layer of 12.5 meters and a perforation length of the destination layer of 10 meters, the horizontal well has a segment pitch of 10+12.5×2=35 meters.

Or the perforation section length of the target layer is the perforation section length corresponding to one or more perforation sections, namely, the perforation section length of the target layer is subdivided according to perforation positions of different perforation sections, in this case, the segmentation interval corresponding to the corresponding perforation section is determined according to the radius of the easy-flow area and the perforation section length corresponding to each perforation section in the one or more perforation sections, and the segmentation interval of the horizontal well is obtained. And adding twice the radius of the easy-flow area to the length of the perforation section corresponding to each perforation section to obtain the corresponding segmentation distance of the corresponding perforation section.

For example, assuming that the radius of the easy-flow zone of the objective layer is 12.5 meters, the horizontal well in the objective layer includes 3 perforation segments, and the lengths of the perforation segments corresponding to the 3 perforation segments are 8 meters, 9 meters and 10 meters, respectively, the segment pitch corresponding to the first perforation segment is 8+12.5x2=33 meters, the segment pitch corresponding to the second perforation segment is 9+12.5x2=34 meters, and the segment pitch corresponding to the third perforation segment is 10+12.5x2=35 meters. Assuming that the total length of the horizontal well is 1000 meters, the total length of the first perforation section is 300 meters, the total length of the second perforation section is 300 meters, and the length of the third perforation section is 400 meters, then the first perforation section is segmented at a segmentation pitch of 33 meters, the second perforation section is segmented at a segmentation pitch of 34 meters, and the third perforation section is segmented at a segmentation pitch of 35 meters.

Step 102: the horizontal well is divided into a plurality of sections to be constructed according to the sectional spacing of the horizontal well.

In the embodiment of the application, after the sectional spacing of the horizontal well is determined, the horizontal well is divided into a plurality of sections to be constructed according to the sectional spacing of the horizontal well.

By way of example, assuming a section spacing of 35 meters for a horizontal well and a total length of 1000 meters for the horizontal well, the horizontal well is equally divided into 29 to-be-constructed sections, with 28 to-be-constructed sections of 35 meters in length and 1 to-be-constructed section of 20 meters in length.

It should be noted that, the dessert segment in the destination layer includes the multiple segments to be applied, and the determined perforation positions corresponding to the dessert segment include the perforation positions corresponding to the multiple segments to be applied.

Step 103: and carrying out alternate construction of fracturing and energy storage on the multiple sections to be constructed.

In the embodiment of the application, a plurality of construction sections included in the horizontal well are constructed by adopting a fracturing and energy storage alternate construction process. The plurality of to-be-constructed sections comprise a plurality of fracturing sections and a plurality of energizing sections, wherein the plurality of fracturing sections are odd-numbered sections in the plurality of to-be-constructed sections, and the plurality of energizing sections are even-numbered sections in the plurality of to-be-constructed sections. Or, the plurality of fracturing segments are even segments of the plurality of segments to be constructed, and the plurality of energizing segments are odd segments of the plurality of segments to be constructed. That is, the plurality of segments to be constructed include a plurality of fracturing segments and a plurality of energizing segments that alternate in parity

In the embodiment of the application, the implementation mode of carrying out alternate construction of fracturing and energy storage on the plurality of sections to be constructed is as follows: selecting one to-be-constructed section from the plurality of to-be-constructed sections in turn according to the construction sequence until the following operations are performed on each to-be-constructed section of the plurality of to-be-constructed sections:

if the selected section to be constructed is a fracturing section, perforating and fracturing construction is carried out on the selected fracturing section according to the perforating position corresponding to the selected fracturing section and the fracturing fluid injection amount; if the selected section to be constructed is an energy-increasing section, perforating and energy-storing construction is carried out on the selected energy-increasing section according to the perforating position corresponding to the selected energy-increasing section and the injection amount of the energy-increasing liquid.

That is, the plurality of sections to be constructed are constructed in an odd-even alternating manner, and after one fracturing section is constructed, the adjacent energizing sections are constructed continuously. For example, the odd sections of the plurality of sections to be constructed are fracturing sections, the even sections are energizing sections, after perforating and fracturing construction is carried out on the first section to be constructed, perforating and energy storage construction is continuously carried out on the second section to be constructed, then perforating and fracturing construction is continuously carried out on the third section to be constructed, and the process is repeated until the construction of the plurality of sections to be constructed, which are included in the horizontal well, is completed.

In the embodiment of the application, before the fracturing and energy storage alternate construction is carried out on the plurality of segments to be constructed, the fracturing fluid injection amount corresponding to each fracturing segment is determined, and the energy increasing fluid injection amount corresponding to each energy increasing segment is determined. And then, when the construction is carried out on a certain fracturing segment, the construction is carried out according to the fracturing fluid injection amount and the perforation position corresponding to the corresponding fracturing segment, and when the construction is carried out on a certain energizing segment, the construction is carried out according to the energizing fluid injection amount and the perforation position corresponding to the corresponding energizing segment.

Based on the above, in the embodiment of the present application, before the construction is performed on the plurality of sections to be constructed, the fracturing fluid injection amount corresponding to the corresponding fracturing section is determined according to the physical properties of the perforation section corresponding to each fracturing section in the plurality of fracturing sections, and the energy increasing fluid injection amount corresponding to the corresponding energy increasing section is determined according to the physical properties of the perforation section corresponding to each energy increasing section in the plurality of energy increasing sections.

Illustratively, the simulation result of the digital-analog software is used for determining the fracturing fluid injection amount corresponding to each fracturing segment and determining the energizing fluid injection amount corresponding to each energizing segment. For example, the digital-analog software is meyer software, physical properties of the perforation section corresponding to each fracturing section are input into the meyer software, a relation curve of the predicted injection liquid amount of the fracturing liquid and the predicted benefit (such as predicted oil production) is output, and the highest point of the relation curve is the finally determined injection liquid amount of the fracturing liquid corresponding to the fracturing section. And inputting physical properties of the perforating section corresponding to each energizing section into meyer software, and outputting a relation curve of the expected injection amount of the energizing liquid and the predicted benefit, wherein the highest point of the relation curve is the finally determined corresponding injection amount of the energizing liquid of the energizing section.

In the embodiment of the application, according to the perforation position and the fracturing fluid injection amount corresponding to the selected fracturing segment, the implementation mode of perforating and fracturing construction on the selected fracturing segment is as follows: perforating the selected fracturing segments according to the perforating positions corresponding to the selected fracturing segments, and injecting fracturing fluid into the perforated fracturing segments according to the fracturing fluid injection amount of the selected fracturing segments.

In the construction process of the fracturing section, the pressure and the displacement are limited. Alternatively, perforating the fracture refers to multi-cluster perforation or continuous perforation, as the application is not limited in this regard. Optionally, the fracturing fluid comprises a surfactant. The surfactant is added into the fracturing fluid, so that the water flooding and imbibition replacement effects can be improved, and the productivity can be improved.

In the embodiment of the application, according to the perforation position and the injection amount of the energizing liquid corresponding to the selected energizing section, the implementation mode of perforating and energy storage construction on the selected energizing section is as follows: perforating the selected energy increasing section according to the perforating position corresponding to the selected energy increasing section, and injecting the energy increasing liquid into the perforated energy increasing section according to the injection amount of the energy increasing liquid of the selected energy increasing section.

Wherein the energizing liquid comprises slickwater and a surfactant. For example, the energized liquid (may also be referred to as energized working liquid) refers to slickwater plus a concentration of 0.1% surfactant. The surfactant is added into the energizing liquid, so that the water flooding and imbibition replacement effects can be improved, and the productivity can be improved. Alternatively, perforating the fracture refers to multi-cluster perforation or continuous perforation, as the application is not limited in this regard. In addition, it is necessary to inject the energizing fluid into the corresponding energizing section with a large displacement under the fracture pressure of the stratum where the energizing section is located.

It should be noted that, in the embodiment of the present application, after each to-be-constructed section is constructed, the drillable bridge plug needs to be put into the section for layering, that is, after perforation and fracturing construction are performed on one fracturing section, the drillable bridge plug is put into the fracturing section, and after perforation and energy storage construction are performed on one energizing section, the drillable bridge plug is put into the energizing section. And after the construction of all the sections to be constructed is completed, a downhole tool is put into the well to drill out all bridge plugs in the plurality of fracturing sections and the plurality of energizing sections. Then, the well can be opened for production, or the well can be opened for production after a small amount of time is closed off. Optionally, the drillable bridge plug running position selects a position that is good in cementing quality and avoids the casing collar.

In addition, in the embodiment of the application, before the fracturing and energy storage alternate construction is performed on the multiple sections to be constructed, well shaft preparation is further required for the horizontal well according to well control requirements, and the well shaft preparation includes well flushing, well killing, well dredging, scraping, sleeve checking, pressure testing, loading the christmas tree and reinforcing the wellhead, and a plurality of steel wire ropes and fixing with a ground anchor.

Next, the horizontal well energizing method provided by the embodiment of the application will be described in detail with reference to the following steps.

And firstly, determining a dessert segment in the target layer according to the logging comprehensive data and the logging comprehensive data of the target layer, and preliminarily determining a perforation position corresponding to the dessert segment.

And step two, determining the radius of the easy-flow area of the target layer according to the permeability of the target layer and the corresponding relation between the permeability and the radius of the easy-flow area.

And thirdly, determining the sectional distance of the horizontal well according to the radius of the easy-flow area and the length of the perforating section of the target layer, and dividing the horizontal well into a plurality of sections to be constructed according to the sectional distance, wherein the sections to be constructed comprise a plurality of fracturing sections and a plurality of energizing sections which are in odd-even alternation.

And fourthly, according to physical properties of the perforation section corresponding to each fracturing section, determining the liquid quantity of each fracturing section by simulation optimization of digital-analog software, namely determining the liquid quantity of fracturing liquid injection corresponding to each fracturing section in the horizontal well. And according to physical properties of the perforation section corresponding to each energizing section, simulating and optimizing by using digital-analog software to determine the liquid quantity of each energizing section, namely determining the liquid quantity of the energizing liquid injection corresponding to each energizing section in the horizontal well.

Fifthly, preparing the well bore before construction according to well control requirements. Well control preparation comprises well flushing, well killing, well dredging, scraping, sleeve checking, pressure testing, tree changing, wellhead reinforcement, multi-wire rope addition and ground anchor fixation.

And sixthly, perforating and fracturing construction is carried out on the fracturing section, and the pressure and discharge are not limited in the construction process.

And seventh, after perforation and fracturing construction of the fracturing section are completed, a drillable bridge plug is put in. The well cementation quality is good and the position of the casing collar is avoided at the position where the drillable bridge plug is placed.

And eighth step, perforating and energy storage construction is carried out on the energy increasing section. Wherein an energizing fluid (comprising slickwater + surfactant) is injected at a large displacement at a burst pressure.

And ninth, after perforation and energy storage construction of the energy increasing section are completed, the drillable bridge plug is put in.

And tenth, repeating the sixth to ninth steps, carrying out perforation and fracturing construction on the odd-numbered sections, carrying out perforation and energy storage construction on the even-numbered sections, or carrying out perforation and pressure fracturing construction on the even-numbered sections, and carrying out perforation and energy storage construction on the odd-numbered sections, namely, carrying out odd-even alternate construction until the horizontal well construction is completed.

And eleventh step, after all construction of a plurality of sections to be constructed of the horizontal well is completed, the drillable bridge plugs are completely drilled by a down-hole tool, and the horizontal well is opened for open-hole production.

From the above, the embodiment of the application provides a method for improving the energy-increasing measures between horizontal well sections, which adopts alternate construction of fracturing and energy storage in a horizontal well to form a water flooding effect in a hypotonic and ultra-hypotonic reservoir, wherein surfactant is added into an energy-increasing liquid to improve the water flooding efficiency and the imbibition replacement efficiency, and the well-soaking time is reduced. Through the synergistic effect of water flooding and dialysis replacement, the transformation effect of the hypotonic ultra-hypotonic reservoir is improved.

Next, taking an H1 well as an example, the horizontal well energizing method provided by the embodiment of the present application will be described in detail with reference to the following steps.

Firstly, according to logging comprehensive data and logging comprehensive data of a target layer, optimizing dessert segments in the target layer, and primarily determining perforation positions corresponding to the dessert segments.

In the second step, assuming that the permeability of the target layer is 3mD, the radius of the easy-flow region of the target layer is determined to be 12.5 meters according to the correspondence between the permeability and the radius of the easy-flow region shown in table 1.

Thirdly, assuming that the length of the perforation section of the target layer is 10m, determining the segment spacing of the horizontal well to be 10+12.5x2=35m. The horizontal well is divided into a plurality of sections to be constructed according to the sectioning interval, and the sections to be constructed comprise a plurality of fracturing sections and a plurality of energizing sections which are alternately arranged in parity.

And fourthly, according to physical properties of the perforating segments corresponding to each fracturing segment and physical properties of the perforating segments corresponding to each energizing segment, simulating and optimizing by using meyer software to determine that the liquid quantity of each fracturing segment is 1600 cubes, namely the liquid quantity of fracturing liquid injection of each fracturing segment in the horizontal well is 1600 cubes, and determining that the liquid quantity of each energizing segment is 2000 cubes, namely the liquid quantity of energizing liquid injection of each energizing segment in the horizontal well is 2000 cubes.

Fifthly, preparing the well bore before construction according to well control requirements. Wellbore preparation includes: flushing, well killing, well dredging, scraping, sleeve checking, pressure testing, 1000-type christmas tree replacement, well head reinforcement, four steel wire ropes and ground anchor fixation.

And sixthly, carrying out multi-cluster perforation and fracturing construction on the fracturing section, wherein the construction pressure is limited to 69MPa.

And seventh, after perforation and fracturing construction of the fracturing section are completed, the drillable bridge plug is put in. The well cementation quality is good and the position of the casing collar is avoided at the position where the drillable bridge plug is placed.

Eighth step, perforating the energy-increasing section and accumulating energy, wherein the discharge capacity is 5-6m under the burst pressure ³ The energizing liquid (comprising slickwater + surfactant at a concentration of 0.1%) is injected per minute.

And tenth, repeating the sixth to ninth steps, carrying out perforation and fracturing construction on the odd sections, and carrying out perforation and energy storage construction on the even sections, namely carrying out odd-even alternate construction until the horizontal well construction is completed.

And eleventh, after the construction of the horizontal well is completed, the drillable bridge plugs are completely drilled by a downhole tool, and the horizontal well is opened, opened and put into production.

From the above, it can be seen that the horizontal well energizing method in the embodiment of the present application integrates the correspondence of geological dessert sections (i.e. perforation positions in dessert sections), permeability and radius of the flowable region, so as to determine the segment spacing of the horizontal well, and ensure that displacement can be formed between different segments of the horizontal well. The alternate construction of fracturing and energy storage is adopted, so that stratum energy can be supplemented in each layer section of the horizontal well, and the stable production time after fracturing can be improved. In addition, because the fracturing and energy storage alternate construction is adopted, the number of fracturing sections in the construction is reduced, sand is not needed in the energy increasing construction, the sand can bring about construction risks such as sand blocking and sand leakage, and certain operation cost is also brought to the sand, so that compared with the process that the fracturing construction is needed in the horizontal well, the scheme reduces the operation cost and the construction risk. In addition, the surfactant is added into the energizing liquid, so that the water flooding and imbibition displacement efficiency is improved.

In summary, in the embodiment of the application, the sectional distance of the horizontal well is determined by considering the corresponding relation between the permeability and the radius of the easy-flowing area, so that displacement can be formed between different sections of the horizontal well, the energy of stratum can be supplemented in each section of the horizontal well by adopting a fracturing and energy storage alternate construction mode, a water flooding effect is formed in a target layer, and the post-fracturing stable production time, namely the productivity, is improved.

All the above optional technical solutions may be combined according to any choice to form an optional embodiment of the present application, and the embodiments of the present application will not be described in detail.

Fig. 2 is a schematic structural diagram of a horizontal well power-up device 200 according to an embodiment of the present application, where the horizontal well power-up device 200 may be implemented as part or all of a computer device by software, hardware, or a combination of both. Referring to fig. 2, the apparatus 200 includes: a first determination module 201, a segmentation module 202, and an execution module 203.

A first determining module 201, configured to determine a segment pitch of a horizontal well in the target layer according to a permeability and a perforation segment length of the target layer, and a correspondence between the permeability and a radius of the easy-flow zone;

a segmentation module 202, configured to divide the horizontal well into a plurality of sections to be constructed according to the segmentation intervals of the horizontal well;

And the execution module 203 is used for carrying out alternate construction of fracturing and energy storage on the plurality of sections to be constructed.

Optionally, the first determining module 201 includes:

and the second determining submodule is used for determining the segment spacing of the horizontal well according to the radius of the easy-flow area and the length of the perforating segment of the target layer.

Optionally, the second determining submodule is configured to:

dividing the horizontal well into one or more perforation segments according to perforation positions corresponding to dessert segments in the target layer;

and determining the corresponding segment spacing of the corresponding perforation segments according to the radius of the easy-flow area and the perforation segment length of each perforation segment in the one or more perforation segments.

Optionally, the apparatus 200 further comprises:

and the second determining module is used for determining perforation positions corresponding to dessert sections in the target layer according to the logging comprehensive data and the logging comprehensive data of the target layer, wherein the dessert sections comprise a plurality of sections to be constructed.

Optionally, the plurality of segments to be applied include a plurality of fracturing segments and a plurality of energizing segments, the plurality of fracturing segments are odd segments of the plurality of segments to be applied, the plurality of energizing segments are even segments of the plurality of segments to be applied, or the plurality of fracturing segments are even segments of the plurality of segments to be applied, the plurality of energizing segments are odd segments of the plurality of segments to be applied;

The execution module 203 includes:

a selecting sub-module for sequentially selecting one to-be-constructed section from a plurality of to-be-constructed sections according to the construction sequence until the following operations are performed on each to-be-constructed section of the plurality of to-be-constructed sections:

Optionally, the execution module 203 further includes:

and the fourth determination submodule is used for determining the injection quantity of the energizing liquid corresponding to each energizing section according to the physical property of the perforating section corresponding to each energizing section in the plurality of energizing sections.

Optionally, the second execution submodule is configured to:

perforating the selected energy increasing section according to the perforating position corresponding to the selected energy increasing section;

And injecting energizing liquid into the perforated energizing section according to the energizing liquid injection amount of the selected energizing section, wherein the energizing liquid comprises slickwater and a surfactant.

It should be noted that: in the horizontal well energizing device provided in the above embodiment, when the horizontal well is energized, only the division of the above functional modules is used for illustration, in practical application, the above functional allocation may be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules, so as to complete all or part of the functions described above. In addition, the horizontal well energizing device provided in the above embodiment and the horizontal well energizing method embodiment belong to the same concept, and specific implementation processes thereof are detailed in the method embodiment and are not repeated here.

Fig. 3 shows a block diagram of a terminal 300 according to an exemplary embodiment of the present application. The terminal 300 may be: smart phones, tablet computers, notebook computers or desktop computers. The terminal 300 may also be referred to by other names of user devices, portable terminals, laptop terminals, desktop terminals, computer devices, control devices, etc.

In general, the terminal 300 includes: a processor 301 and a memory 302.

Processor 301 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and the like. The processor 301 may be implemented in at least one hardware form of DSP (Digital Signal Processing ), FPGA (Field-Programmable Gate Array, field programmable gate array), PLA (Programmable Logic Array ). The processor 301 may also include a main processor, which is a processor for processing data in an awake state, also called a CPU (Central Processing Unit ), and a coprocessor; a coprocessor is a low-power processor for processing data in a standby state. In some embodiments, the processor 301 may be integrated with a GPU (Graphics Processing Unit, image processor) for taking care of rendering and drawing of content that the display screen is required to display. In some embodiments, the processor 301 may also include an AI (Artificial Intelligence ) processor for processing computing operations related to machine learning.

Memory 302 may include one or more computer-readable storage media, which may be non-transitory. Memory 302 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 302 is used to store at least one instruction for execution by processor 301 to implement the horizontal well stimulation method provided by the method embodiments of the present application.

In some embodiments, the terminal 300 may further optionally include: a peripheral interface 303, and at least one peripheral. The processor 301, memory 302, and peripheral interface 303 may be connected by a bus or signal line. The individual peripheral devices may be connected to the peripheral device interface 303 by buses, signal lines, or circuit boards. Specifically, the peripheral device includes: at least one of radio frequency circuitry 304, display 305, camera assembly 306, audio circuitry 307, positioning assembly 308, and power supply 309.

The peripheral interface 303 may be used to connect at least one Input/Output (I/O) related peripheral to the processor 301 and the memory 302. In some embodiments, processor 301, memory 302, and peripheral interface 303 are integrated on the same chip or circuit board; in some other embodiments, either or both of the processor 301, the memory 302, and the peripheral interface 303 may be implemented on separate chips or circuit boards, which is not limited in this embodiment.

The Radio Frequency circuit 304 is configured to receive and transmit RF (Radio Frequency) signals, also known as electromagnetic signals. The radio frequency circuitry 304 communicates with a communication network and other communication devices via electromagnetic signals. The radio frequency circuit 304 converts an electrical signal into an electromagnetic signal for transmission, or converts a received electromagnetic signal into an electrical signal. Optionally, the radio frequency circuit 304 includes: antenna systems, RF transceivers, one or more amplifiers, tuners, oscillators, digital signal processors, codec chipsets, subscriber identity module cards, and so forth. The radio frequency circuitry 304 may communicate with other terminals via at least one wireless communication protocol. The wireless communication protocol includes, but is not limited to: metropolitan area networks, various generations of mobile communication networks (2G, 3G, 4G, and 5G), wireless local area networks, and/or WiFi (Wireless Fidelity ) networks. In some embodiments, the radio frequency circuitry 304 may also include NFC (Near Field Communication ) related circuitry, which is not limiting of the application.

The display screen 305 is used to display a UI (User Interface). The UI may include graphics, text, icons, video, and any combination thereof. When the display 305 is a touch screen, the display 305 also has the ability to collect touch signals at or above the surface of the display 305. The touch signal may be input as a control signal to the processor 301 for processing. At this point, the display 305 may also be used to provide virtual buttons and/or virtual keyboards, also referred to as soft buttons and/or soft keyboards. In some embodiments, the display 305 may be one, providing a front panel of the terminal 300; in other embodiments, the display screen 305 may be at least two, respectively disposed on different surfaces of the terminal 300 or in a folded design; in other embodiments, the display 305 may be a flexible display disposed on a curved surface or a folded surface of the terminal 300. Even more, the display screen 305 may be arranged in an irregular pattern other than rectangular, i.e., a shaped screen. The display 305 may be made of LCD (Liquid Crystal Display ), OLED (Organic Light-Emitting Diode) or other materials.

The camera assembly 306 is used to capture images or video. Optionally, the camera assembly 306 includes a front camera and a rear camera. Typically, the front camera is disposed on the front panel of the terminal and the rear camera is disposed on the rear surface of the terminal. In some embodiments, the at least two rear cameras are any one of a main camera, a depth camera, a wide-angle camera and a tele camera, so as to realize that the main camera and the depth camera are fused to realize a background blurring function, and the main camera and the wide-angle camera are fused to realize a panoramic shooting and Virtual Reality (VR) shooting function or other fusion shooting functions. In some embodiments, camera assembly 306 may also include a flash. The flash lamp can be a single-color temperature flash lamp or a double-color temperature flash lamp. The dual-color temperature flash lamp refers to a combination of a warm light flash lamp and a cold light flash lamp, and can be used for light compensation under different color temperatures.

The audio circuit 307 may include a microphone and a speaker. The microphone is used for collecting sound waves of users and environments, converting the sound waves into electric signals, and inputting the electric signals to the processor 301 for processing, or inputting the electric signals to the radio frequency circuit 304 for voice communication. For the purpose of stereo acquisition or noise reduction, a plurality of microphones may be respectively disposed at different portions of the terminal 300. The microphone may also be an array microphone or an omni-directional pickup microphone. The speaker is used to convert electrical signals from the processor 301 or the radio frequency circuit 304 into sound waves. The speaker may be a conventional thin film speaker or a piezoelectric ceramic speaker. When the speaker is a piezoelectric ceramic speaker, not only the electric signal can be converted into a sound wave audible to humans, but also the electric signal can be converted into a sound wave inaudible to humans for ranging and other purposes. In some embodiments, the audio circuit 307 may also include a headphone jack.

The location component 308 is used to locate the current geographic location of the terminal 300 to enable navigation or LBS (Location Based Service, location-based services). The positioning component 308 may be a positioning component based on the United states GPS (Global Positioning System ), the Beidou system of China, the Granati system of Russia, or the Galileo system of the European Union.

The power supply 309 is used to power the various components in the terminal 300. The power source 309 may be alternating current, direct current, disposable or rechargeable. When the power source 309 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, the terminal 300 further includes one or more sensors 310. The one or more sensors 310 include, but are not limited to: acceleration sensor 311, gyroscope sensor 312, pressure sensor 313, fingerprint sensor 314, optical sensor 315, and proximity sensor 316.

The acceleration sensor 311 can detect the magnitudes of accelerations on three coordinate axes of the coordinate system established with the terminal 300. For example, the acceleration sensor 311 may be used to detect components of gravitational acceleration on three coordinate axes. The processor 301 may control the display screen 305 to display a user interface in a landscape view or a portrait view according to the gravitational acceleration signal collected by the acceleration sensor 311. The acceleration sensor 311 may also be used for the acquisition of motion data of a game or a user.

The gyro sensor 312 may detect the body direction and the rotation angle of the terminal 300, and the gyro sensor 312 may collect the 3D motion of the user to the terminal 300 in cooperation with the acceleration sensor 311. The processor 301 may implement the following functions according to the data collected by the gyro sensor 312: motion sensing (e.g., changing UI according to a tilting operation by a user), image stabilization at shooting, game control, and inertial navigation.

The pressure sensor 313 may be disposed at a side frame of the terminal 300 and/or at a lower layer of the display 305. When the pressure sensor 313 is disposed at a side frame of the terminal 300, a grip signal of the terminal 300 by a user may be detected, and the processor 301 performs left-right hand recognition or shortcut operation according to the grip signal collected by the pressure sensor 313. When the pressure sensor 313 is disposed at the lower layer of the display screen 305, the processor 301 controls the operability control on the UI interface according to the pressure operation of the user on the display screen 305. The operability controls include at least one of a button control, a scroll bar control, an icon control, and a menu control.

The fingerprint sensor 314 is used to collect a fingerprint of a user, and the processor 301 identifies the identity of the user based on the fingerprint collected by the fingerprint sensor 314, or the fingerprint sensor 314 identifies the identity of the user based on the collected fingerprint. Upon recognizing that the user's identity is a trusted identity, the user is authorized by the processor 301 to perform relevant sensitive operations including unlocking the screen, viewing encrypted information, downloading software, paying for and changing settings, etc. The fingerprint sensor 314 may be provided on the front, back or side of the terminal 300. When a physical key or a manufacturer Logo is provided on the terminal 300, the fingerprint sensor 314 may be integrated with the physical key or the manufacturer Logo.

The optical sensor 315 is used to collect the ambient light intensity. In one embodiment, processor 301 may control the display brightness of display screen 305 based on the intensity of ambient light collected by optical sensor 315. Specifically, when the intensity of the ambient light is high, the display brightness of the display screen 305 is turned up; when the ambient light intensity is low, the display brightness of the display screen 305 is turned down. In another embodiment, the processor 301 may also dynamically adjust the shooting parameters of the camera assembly 306 according to the ambient light intensity collected by the optical sensor 315.

A proximity sensor 316, also referred to as a distance sensor, is typically provided on the front panel of the terminal 300. The proximity sensor 316 is used to collect the distance between the user and the front of the terminal 300. In one embodiment, when the proximity sensor 316 detects a gradual decrease in the distance between the user and the front of the terminal 300, the processor 301 controls the display 305 to switch from the bright screen state to the off screen state; when the proximity sensor 316 detects that the distance between the user and the front surface of the terminal 300 gradually increases, the processor 301 controls the display screen 305 to switch from the off-screen state to the on-screen state.

Those skilled in the art will appreciate that the structure shown in fig. 3 is not limiting and that more or fewer components than shown may be included or certain components may be combined or a different arrangement of components may be employed.

In some embodiments, there is also provided a computer readable storage medium having stored therein a computer program which when executed by a processor implements the steps of the horizontal well stimulation method of the above embodiments. For example, the computer readable storage medium may be ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.

It is noted that the computer readable storage medium mentioned in the embodiments of the present application may be a non-volatile storage medium, in other words, may be a non-transitory storage medium.

It should be understood that all or part of the steps to implement the above-described embodiments may be implemented by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The computer instructions may be stored in the computer-readable storage medium described above.

That is, in some embodiments, there is also provided a computer program product containing instructions that, when run on a computer, cause the computer to perform the steps of the horizontal well stimulation method described above.

It should be understood that references herein to "at least one" mean one or more, and "a plurality" means two or more. In the description of the embodiments of the present application, unless otherwise indicated, "/" means or, for example, a/B may represent a or B; "and/or" herein is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, in order to facilitate the clear description of the technical solution of the embodiments of the present application, in the embodiments of the present application, the words "first", "second", etc. are used to distinguish the same item or similar items having substantially the same function and effect. It will be appreciated by those of skill in the art that the words "first," "second," and the like do not limit the amount and order of execution, and that the words "first," "second," and the like do not necessarily differ.

The above embodiments are not intended to limit the present application, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present application should be included in the scope of the present application.

Claims

1. A method of energizing a horizontal well, the method comprising:

carrying out alternate construction of fracturing and energy storage on the multiple sections to be constructed;

the plurality of to-be-constructed sections comprise a plurality of fracturing sections and a plurality of energizing sections, wherein the plurality of fracturing sections are odd sections in the plurality of to-be-constructed sections, the plurality of energizing sections are even sections in the plurality of to-be-constructed sections, or the plurality of fracturing sections are even sections in the plurality of to-be-constructed sections, and the plurality of energizing sections are odd sections in the plurality of to-be-constructed sections;

2. The method of claim 1, wherein determining the segment spacing of the horizontal wells in the destination layer based on the permeability and perforation segment length of the destination layer and the correspondence of permeability to radius of the zone of easy flow comprises:

3. The method of claim 2, wherein the determining the segment spacing of the horizontal well based on the flowzone radius and the perforation segment length comprises:

4. A method according to any one of claims 1-3, wherein before determining the segment spacing of the horizontal well in the destination layer according to the permeability and perforation segment length of the destination layer and the correspondence between permeability and radius of the zone of easy flow, the method further comprises:

5. The method of claim 4, wherein prior to the alternating fracturing and energy storage construction of the plurality of segments to be constructed, further comprising:

6. A method according to any one of claims 1-3, wherein perforating and energy-storing the selected energy-increasing section according to the perforating position and the amount of the energy-increasing liquid injection corresponding to the selected energy-increasing section comprises:

7. A horizontal well energizing apparatus, the apparatus comprising:

the execution module is used for carrying out alternate construction of fracturing and energy storage on the plurality of sections to be constructed;

the execution module comprises:

8. A computer readable storage medium, characterized in that the computer readable storage medium has stored therein a computer program which, when executed by a processor, implements the steps of the method of any of claims 1-6.