CN111119832A

CN111119832A - Unstable alternate mining method and device for facing horizontal well pattern

Info

Publication number: CN111119832A
Application number: CN201911127586.7A
Authority: CN
Inventors: 宋新民; 李勇; 赵丽敏; 王舒; 孙亮
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2019-11-18
Filing date: 2019-11-18
Publication date: 2020-05-08

Abstract

The invention provides an unstable alternate mining method and device for facing a horizontal well pattern, wherein the method comprises the following steps: controlling a horizontal well pattern to execute a first oil exploitation step in a first operation period; the horizontal well pattern is preset; controlling the horizontal well pattern to execute a second oil exploitation step in a second operation period; the first oil exploitation step comprises the steps of reducing the water injection amount of the odd-numbered rows of water injection wells, improving the water injection amount of the even-numbered rows of water injection wells, reducing the yield of the even-numbered rows of oil exploitation wells and improving the yield of the odd-numbered rows of oil exploitation wells; the second oil exploitation step comprises the steps of reducing the water injection amount of the water injection wells in the even rows and improving the water injection amount of the water injection wells in the odd rows, and reducing the yield of the oil exploitation wells in the odd rows and improving the yield of the oil exploitation wells in the even rows; the first oil producing step and the second oil producing step are alternately performed. The device is used for executing the method. The unstable alternative exploitation method and the device for the well pattern of the horizontal well, provided by the embodiment of the invention, improve the oil field recovery rate.

Description

Unstable alternate mining method and device for facing horizontal well pattern

Technical Field

The invention relates to the technical field of oil exploitation, in particular to an unstable alternative exploitation method and device for a well pattern of a horizontal well.

Background

In recent years, horizontal wells have been widely developed and applied in the field of reservoir development. For carbonate reservoirs, the reservoir heterogeneity is strong, the reservoir types are complex and various, and the middle-thin layer thickness biological debris limestone reservoir is a representative carbonate reservoir. The thickness of an oil layer of the oil reservoir is less than 50m, the longitudinal physical difference of the oil reservoir is large, a high-permeability strip exists, and an interlayer does not develop, so that the development is generally carried out by adopting a bottom injection and top extraction mode of an integral horizontal well.

The water injection development of the horizontal well has achieved a good development result in the carbonate reservoir, and a water injection development mode of an integral horizontal well linear opposite well pattern with small well spacing, small array spacing, long horizontal section, parallel opposite direction, toe-following reverse direction and bottom injection top production is formed. However, with the continuous deepening of the water injection development process, the oil reservoirs gradually enter a medium-high water-cut period, and the problem of horizontal well flooding is increasingly prominent, so that the problem of restricting the long-term high and stable yield of the oil reservoirs is a great challenge. At present, the research on developing well patterns of horizontal wells at home and abroad mainly focuses on the research on the contents of well types, well arrangement modes, well spacing and row spacing of injection and production well patterns and how to encrypt and adjust the well patterns in different development stages. In the aspect of improving the water flooding development effect, the prior art comprises hydrodynamics methods such as adjustment technologies for changing the liquid flow direction of single-well periodic water injection, chemical agent injection and the like, point supplementing and drainage water injection well patterns perfecting and the like. However, optimizing and adjusting the well pattern as a whole by supplementing new wells or performing sidetracking of old wells, etc. increases production costs, and hydrodynamic methods directed to individual or local well pattern adjustments have limited effect on improving water flooding development. Therefore, how to improve the water injection development effect by using the existing horizontal well pattern is a technical problem to be solved urgently.

Disclosure of Invention

Aiming at the problems in the prior art, the embodiment of the invention provides an unstable alternative mining method and device for a well pattern of a horizontal well, which can at least partially solve the problems in the prior art.

On one hand, the invention provides an unstable alternative mining method for facing a horizontal well pattern, which comprises the following steps:

controlling a horizontal well pattern to execute a first oil exploitation step in a first operation period; the horizontal well pattern is preset and comprises at least three rows and three columns of injection and production wells;

controlling the horizontal well pattern to perform a second oil production step in a second operation period; or,

controlling the horizontal well pattern to perform the second oil production step during the first operational period;

controlling the horizontal well pattern to perform the first oil production step during the second operational period;

the first oil extraction step comprises the steps of reducing the water injection amount of the odd-numbered rows of water injection wells, improving the water injection amount of the even-numbered rows of water injection wells, reducing the yield of the even-numbered rows of oil production wells and improving the yield of the odd-numbered rows of oil production wells; the second oil extraction step comprises reducing the water injection amount of the even-numbered rows of water injection wells and increasing the water injection amount of the odd-numbered rows of water injection wells, and reducing the yield of the odd-numbered rows of oil production wells and increasing the yield of the even-numbered rows of oil production wells; the first oil producing step and the second oil producing step are alternately performed.

In another aspect, the present invention provides an unstable alternative mining apparatus in which a horizontal well pattern is directly opposite to a horizontal well pattern, comprising:

the first control device is used for controlling the horizontal well pattern to execute a first oil exploitation step in a first operation period; the horizontal well pattern is preset and comprises at least three rows and three columns of injection and production wells;

the second control device is used for controlling the horizontal well pattern to execute a second oil exploitation step in a second operation period; or,

third control means for controlling said horizontal well pattern to perform said second oil production step during said first operational period;

a fourth control device for controlling the horizontal well pattern to perform the first oil producing step during the second operational period;

In another aspect, the present invention provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the method for unstable alternating current mining with a horizontal well pattern facing a horizontal well pattern according to any of the above embodiments.

In yet another aspect, the present invention provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method of any of the above embodiments for unstable alternating production with a horizontal well pattern that is directly opposite to the horizontal well pattern.

The method and the device for unstable alternative production of the horizontal well network facing the horizontal well network provided by the embodiment of the invention control the horizontal well network to execute the first oil production step in the first operation period, then control the horizontal well network to execute the second oil production step in the second operation period, or control the horizontal well network to execute the second oil production step in the first operation period, and then control the horizontal well network to execute the first oil production step in the second operation period, wherein the first oil production step comprises reducing the water injection amount of the odd-numbered columns of water injection wells and increasing the water injection amount of the even-numbered columns of water injection wells, and reducing the yield of the even-numbered columns of oil production wells and increasing the yield of the odd-numbered columns of oil production wells, the second oil production step comprises reducing the water injection amount of the even-numbered columns of water injection wells and increasing the water injection amount of the odd-numbered columns of water injection wells, and reducing the yield of the odd-numbered columns of oil production wells and increasing the yield of, the first oil exploitation step and the second oil exploitation step are alternately executed, the displacement direction of an injection and production flow line is changed by adjusting the water injection well and the oil exploitation well in the first oil exploitation step and the second oil exploitation step, the sweep coefficient is obviously improved, the utilization rate of injection water of a horizontal well pattern is effectively improved, the sweep coefficient is improved, the exploitation of residual oil is facilitated, and the oil field recovery ratio is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts. In the drawings:

fig. 1 is a schematic flow chart of an unstable alternative mining method in which a horizontal well pattern is directly opposite to the horizontal well pattern according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a horizontal well pattern provided by an embodiment of the present invention.

FIG. 3 is a schematic view of the injection and production flow lines of a horizontal well pattern provided by one embodiment of the present invention during a first operational cycle.

FIG. 4 is a schematic view of the injection and production flow lines of a horizontal well pattern provided by one embodiment of the present invention during a second operational cycle.

FIG. 5 is a schematic flow chart of a method of producing unstable alternating production with a horizontal well pattern facing the horizontal well pattern according to another embodiment of the present invention.

FIG. 6 is a comparison of oil production for a high water well group provided by an embodiment of the present invention.

Fig. 7 is a schematic structural diagram of an unstable alternative production apparatus in which a horizontal well pattern is aligned with a horizontal well pattern according to an embodiment of the present invention.

Fig. 8 is a schematic structural view of an unstable alternative production apparatus with a horizontal well pattern facing the horizontal well pattern according to another embodiment of the present invention.

Fig. 9 is a schematic physical structure diagram of an electronic device according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

In order to facilitate understanding of the technical solutions provided in the present application, the following briefly describes the research background of the technical solutions in the present application. Generally, the vertical well pattern adjustment means are various, and the water injection development effect of the vertical well pattern can be improved through a series of means such as hole patching, water plugging and profile control, but the horizontal well pattern is very limited relative to the vertical well pattern adjustment means, and the effect is more limited. Therefore, the embodiment of the invention provides an unstable alternate mining method for a well pattern of a horizontal well, which can improve the water injection development effect. Especially for old oil fields which have been developed for a certain period of time, the oil yield can be improved, the comprehensive water content can be reduced without adding new injection and production wells, and the oil exploitation cost is reduced. The execution main body of the unstable alternative mining method for the horizontal well pattern provided by the embodiment of the invention can comprise but is not limited to control equipment of the horizontal well pattern.

Fig. 1 is a schematic flow chart of an unstable alternative mining method for a well pattern of a horizontal well according to an embodiment of the present invention, and as shown in fig. 1, the unstable alternative mining method for a well pattern of a horizontal well according to an embodiment of the present invention includes:

s101, in a first operation period, controlling a horizontal well pattern to execute a first oil exploitation step, wherein the first oil exploitation step comprises reducing the water injection amount of odd-numbered rows of water injection wells and increasing the water injection amount of even-numbered rows of water injection wells, and reducing the yield of even-numbered rows of oil exploitation wells and increasing the yield of odd-numbered rows of oil exploitation wells; the horizontal well pattern is preset and comprises at least three rows and three columns of injection and production wells;

specifically, in a first operation period, controlling the horizontal well pattern to execute a first oil exploitation step, namely reducing the water injection amount of the odd-numbered columns of water injection wells of the horizontal well pattern and increasing the water injection amount of the even-numbered columns of water injection wells of the horizontal well pattern, and reducing the yield of the even-numbered columns of oil exploitation wells of the horizontal well pattern and increasing the yield of the odd-numbered columns of oil exploitation wells of the horizontal well pattern. The horizontal well pattern is preset and comprises at least three rows and three columns of injection and production wells, wherein the injection and production wells refer to a water injection well and a production well. The reduction of the water injection amount of the odd-numbered rows of water injection wells and the improvement of the water injection amount of the even-numbered rows of water injection wells are set according to actual conditions, and the embodiment of the invention is not limited. The reduction of the yield of the production wells in the even rows and the increase of the yield of the production wells in the odd rows are set according to actual conditions, and the embodiment of the invention is not limited. Wherein, the horizontal well pattern is a linear opposite well pattern.

The horizontal well pattern is a horizontal well linear injection and production well group which is selected to be suitable for the unstable alternate production method for facing the horizontal well pattern provided by the embodiment of the invention and is obtained by performing water injection analysis and screening on the existing injection and production well group based on geological knowledge, production dynamic analysis knowledge and the like. The selection principle of the horizontal well pattern can comprise the following steps: (1) the horizontal well pattern comprises at least three rows and three columns of injection and production wells, so that the implementation effect of alternate water injection of the well pattern can be ensured; (2) after the horizontal well pattern is subjected to water injection development for a long time, the comprehensive water content of the injection and production well is high, and the development effect is difficult to further improve through injection and production parameter optimization; (3) the horizontal well pattern has low extraction degree, a large amount of residual oil enrichment areas exist, and the potential of further mining potential and improving recovery ratio is realized; (4) the injection capacity of the water injection well of the horizontal well pattern can be improved, and the requirement of the unstable alternate mining method for the horizontal well pattern on improving the water injection amount of the water injection well can be met.

For example, fig. 2 is a schematic structural diagram of a horizontal well pattern according to an embodiment of the present invention, and as shown in fig. 2, the horizontal well pattern includes three rows and five columns of injection wells, the 1 st row and the 3 rd row are horizontal production wells, the 2 nd row is horizontal injection well, each column includes one injection well and two production wells, and the injection wells or the production wells in each row are arranged linearly. As can be seen from fig. 2, in the prior art oil exploitation method, the injected water of the water injection well flows from the water injection well to the oil production well, and the direction of the injection and production flow line is mainly perpendicular to the horizontal section of the water injection well.

For example, fig. 3 is a schematic view of an injection and production flow line of a horizontal well network in a first operation cycle according to an embodiment of the present invention, and as shown in fig. 3, the water injection rates of the water injection wells in the 1 st, 3 rd and 5 th rows may be reduced to about 0.5 times of the previous water injection rate, the water injection rates of the water injection wells in the 2 nd, 3 rd and 5 th rows may be increased, and the water injection rates of the water injection wells in the 2 nd and 4 th rows may be increased to about 1.5 times of the previous water injection rate, so that the water injection rate of the horizontal well network is consistent with the water injection rate before the unstable alternative production method for the right horizontal well network according to the embodiment of the present invention is adopted. The production of the 2 nd and 4 th oil production wells can be reduced to about 0.8 time of the previous production, the production of the 1 st, 3 rd and 5 th oil production wells can be improved to about 1.2 times of the previous production, and the production of the horizontal well pattern is consistent with the production before the unstable alternative production method for the horizontal well pattern provided by the embodiment of the invention is adopted. Through the adjustment, the 2 nd row and the 4 th row of water injection wells correspond to four corner wells and two side wells around, and the 1 st row, the 3 rd row and the 5 th row of water injection wells correspond to two oil recovery wells in the row direction. The direction of the injection and production flow lines of the 2 nd and 4 th water injection wells and the four surrounding corner wells forms a certain included angle with the direction of the horizontal section of the water injection well, and compared with the injection and production flow lines in the figures 2 and 3, the direction of the original injection and production flow line of the horizontal well pattern can be found to be changed, namely the direction of the original injection and production flow line of the 1 st, 3 rd and 5 th oil wells is changed. The water injection rate of the 2 nd row and the 4 th row of water injection wells is obviously improved, four corner wells around the more flow direction of injected water, and the 1 st row, the 3 rd row and the 5 th row of water injection wells have reduced the water injection rate, and the injected water mainly flows to the just right oil recovery well, makes oil in the residual oil detention area of horizontal well pattern is effectively used, thereby has delayed the water-containing oil rising speed, plays the effect of steady oil accuse water, can improve the sweep coefficient, is favorable to the exploitation of residual oil, has improved the oil field recovery ratio.

S102, in a second operation period, controlling the horizontal well pattern to execute a second oil exploitation step, wherein the second oil exploitation step comprises reducing the water injection amount of the even-numbered rows of water injection wells and improving the water injection amount of the odd-numbered rows of water injection wells, and reducing the yield of the odd-numbered rows of oil exploitation wells and improving the yield of the even-numbered rows of oil exploitation wells; the first oil producing step and the second oil producing step are alternately performed.

Specifically, in a second operation period, the horizontal well pattern is controlled to execute a second oil exploitation step, namely the water injection amount of the even-numbered rows of water injection wells is reduced, the water injection amount of the odd-numbered rows of water injection wells is increased, and the yield of the odd-numbered rows of oil exploitation wells is reduced and the yield of the even-numbered rows of oil exploitation wells is increased. After the execution of the second operation period is finished, the first operation period is repeated, the horizontal well pattern is controlled to execute a first oil exploitation step, then the second operation period is repeated, the horizontal well pattern is controlled to execute a second oil exploitation step, and the first oil exploitation step and the second oil exploitation step are executed alternately. The amount of reduction of the water injection amount of the even-numbered rows of water injection wells and the amount of increase of the water injection amount of the odd-numbered rows of water injection wells are set according to actual conditions, and the embodiment of the invention is not limited. The reduction of the yield of the odd-numbered rows of oil production wells and the increase of the yield of the even-numbered rows of oil production wells are set according to actual conditions, and the embodiment of the invention is not limited.

For example, fig. 4 is a schematic view of an injection and production flow line of a horizontal well network in a second operation cycle according to an embodiment of the present invention, and as shown in fig. 4, the water injection rates of the water injection wells in the 1 st, 3 rd and 5 th rows may be increased to about 1.5 times of the previous water injection rate, the water injection rates of the water injection wells in the 2 nd and 4 th rows may be decreased, and the water injection rates of the water injection wells in the 2 nd and 4 th rows may be decreased to about 0.5 times of the previous water injection rate, so that the water injection rate of the horizontal well network is consistent with the water injection rate before the unstable alternative production method for the right-facing horizontal well network according to the embodiment of the present invention is adopted. The yield of the 2 nd row and the 4 th row of oil production wells can be improved to about 1.2 times of the previous yield, and the yield of the 1 st row, the 3 rd row and the 5 th row of oil production wells can be reduced to about 0.8 time of the previous yield, so that the yield of the horizontal well pattern is consistent with the yield before the unstable alternative production method for facing the horizontal well pattern provided by the embodiment of the invention is adopted. Through the adjustment, the 3 rd row of water injection wells correspond to four corner wells and two side wells around, the 1 st row of water injection wells and the 5 th row of water injection wells correspond to two corner wells and two side wells around, and the 2 nd row of water injection wells and the 4 th row of water injection wells correspond to two oil production wells in the row direction. The direction of the injection and production flow lines of the 1 st, 3 rd and 5 th water injection wells and the surrounding corner wells forms a certain included angle with the direction of the horizontal section of the water injection well, and compared with the injection and production flow lines in the figures 2 and 4, the direction of the original injection and production flow line of the horizontal well pattern can be found to be changed, namely the direction of the original injection and production flow line of the 2 nd and 4 th oil wells is changed. The water injection rate of the 1 st row, the 3 rd row and the 5 th row water injection well is obviously improved, more flow direction peripheral angle wells of injected water, and the 2 nd row and the 4 th row water injection well have reduced the water injection rate, and the injected water mainly flows to just right oil recovery well, makes oil in the residual oil detention area of horizontal well pattern is effectively used, thereby has delayed the water-containing oil rising speed, plays the effect of steady oil accuse water, can improve the sweep coefficient, is favorable to the exploitation of residual oil, has improved the oil field recovery ratio.

As can also be seen from fig. 3 and 4, in the first operation period and the second operation period between two adjacent columns of injection and production wells, the flow direction of the injected water is changed, for example, between the injection and production wells in the 1 st column and the 2 nd column, in the first operation period, the injected water is displaced from right to left, and in the second operation period, the injected water is displaced from left to right, so that while the residual oil is ensured to be sufficiently and continuously displaced, the injected water is prevented from flushing the reservoir layer for a long time to form an advantageous passage, thereby avoiding the ineffective circulation of the injected water in the formation, obviously expanding the swept volume of the injected water, further improving the water displacement efficiency, and further improving the oil yield.

The unstable alternative exploitation method for facing a horizontal well network provided by the embodiment of the invention comprises the steps of controlling the horizontal well network to execute a first oil exploitation step in a first operation period, and then controlling the horizontal well network to execute a second oil exploitation step in a second operation period, wherein the first oil exploitation step comprises the steps of reducing the water injection amount of water injection wells in odd columns and increasing the water injection amount of water injection wells in even columns, and reducing the yield of oil exploitation wells in even columns and increasing the yield of oil exploitation wells in odd columns, the second oil exploitation step comprises the steps of reducing the water injection amount of water injection wells in even columns and increasing the water injection amount of water injection wells in odd columns, and reducing the yield of oil exploitation wells in odd columns and increasing the yield of oil exploitation wells in even columns, the first oil exploitation step and the second oil exploitation step are alternately executed, and through the adjustment of the water injection wells and the oil exploitation wells in the first oil exploitation step and the second oil exploitation step, the displacement direction of the injection and production flow line is changed, the sweep coefficient is obviously improved, the utilization rate of injected water of a horizontal well pattern is effectively improved, the sweep coefficient is improved, the exploitation of residual oil is facilitated, and the oil field recovery ratio is improved. In addition, in the process of well pattern alternate water injection, the injection amount is periodically changed, an unstable pressure field is generated in the stratum, and oil and water in the stratum are continuously exchanged and distributed again, so that the effects of improving the longitudinal sweep efficiency and improving the interlayer balance exploitation are achieved.

Fig. 5 is a schematic flow chart of a method for producing unstable alternating current to a horizontal well pattern according to another embodiment of the present invention, and as shown in fig. 5, based on the foregoing embodiments, the method for producing unstable alternating current to a horizontal well pattern according to an embodiment of the present invention further includes:

s501, in a first operation period, controlling a horizontal well pattern to execute a second oil exploitation step, wherein the second oil exploitation step comprises the steps of reducing the water injection amount of even-numbered rows of water injection wells, increasing the water injection amount of odd-numbered rows of water injection wells, reducing the yield of odd-numbered rows of oil exploitation wells and increasing the yield of even-numbered rows of oil exploitation wells; the horizontal well pattern is preset and comprises at least three rows and three columns of injection and production wells;

specifically, in the first operation period, the horizontal well pattern is controlled to execute a second oil exploitation step, namely, the water injection amount of the even-numbered rows of water injection wells is reduced, the water injection amount of the odd-numbered rows of water injection wells is increased, and the yield of the odd-numbered rows of oil exploitation wells is reduced and the yield of the even-numbered rows of oil exploitation wells is increased. The specific implementation process of step S501 is similar to that of step S102, and is not described here again.

S502, in a second operation period, controlling the horizontal well pattern to execute a first oil exploitation step, wherein the first oil exploitation step comprises reducing the water injection amount of the odd-numbered rows of water injection wells and increasing the water injection amount of the even-numbered rows of water injection wells, and reducing the yield of the even-numbered rows of oil production wells and increasing the yield of the odd-numbered rows of oil production wells; the first oil producing step and the second oil producing step are alternately performed.

Specifically, in the second operation period, the horizontal well pattern is controlled to execute a first oil exploitation step, namely the water injection amount of the odd-numbered columns of water injection wells of the horizontal well pattern is closed and the water injection amount of the even-numbered columns of water injection wells of the horizontal well pattern is increased, and the yield of the even-numbered columns of oil exploitation wells of the horizontal well pattern is reduced and the yield of the odd-numbered columns of oil exploitation wells of the horizontal well pattern is increased. After the execution of the second operation period is finished, the first operation period is repeated, the horizontal well pattern is controlled to execute a first oil exploitation step, then the second operation period is repeated, the horizontal well pattern is controlled to execute a second oil exploitation step, and the first oil exploitation step and the second oil exploitation step are executed alternately. The specific implementation process of step S502 is similar to that of step S101, and is not described herein again.

The unstable alternative exploitation method for facing a horizontal well network provided by the embodiment of the invention comprises the steps of controlling the horizontal well network to execute a second oil exploitation step in a first operation period, then controlling the horizontal well network to execute a first oil exploitation step in a second operation period, wherein the first oil exploitation step comprises the steps of reducing the water injection amount of odd-numbered columns of water injection wells and increasing the water injection amount of even-numbered columns of water injection wells, and reducing the yield of even-numbered columns of oil exploitation wells and increasing the yield of odd-numbered columns of oil exploitation wells, the second oil exploitation step comprises the steps of reducing the water injection amount of even-numbered columns of water injection wells and increasing the water injection amount of odd-numbered columns of water injection wells, and reducing the yield of odd-numbered columns of oil exploitation wells and increasing the yield of even-numbered columns of oil exploitation wells, the first oil exploitation step and the second oil exploitation step are alternately executed, and the water injection wells and the oil exploitation wells are adjusted in the first, the displacement direction of the injection and production flow line is changed, the sweep coefficient is obviously improved, the utilization rate of injected water of a horizontal well pattern is effectively improved, the sweep coefficient is improved, the exploitation of residual oil is facilitated, and the oil field recovery ratio is improved. In addition, in the process of well pattern alternate water injection, the injection amount is periodically changed, an unstable pressure field is generated in the stratum, and oil and water in the stratum are continuously exchanged and distributed again, so that the effects of improving the longitudinal sweep efficiency and improving the interlayer balance exploitation are achieved.

On the basis of the above embodiments, further, the reducing the water injection amount of the odd-numbered columns of water injection wells and the increasing the water injection amount of the even-numbered columns of water injection wells includes:

reducing the water injection amount of the odd-numbered rows of water injection wells to 0.4-0.6 times of the previous water injection amount, and increasing the water injection amount of the even-numbered rows of water injection wells to 1.4-1.6 times of the previous water injection amount.

Specifically, when the first oil exploitation step is performed, the water injection amount of the odd-numbered rows of water injection wells may be reduced to 0.4 to 0.6 times of the previous water injection amount, and the water injection amount of the even-numbered rows of water injection wells may be increased to 1.4 to 1.6 times of the previous water injection amount of the even-numbered rows of water injection wells. When the water injection amount of the odd-numbered rows of water injection wells and the water injection amount of the even-numbered rows of water injection wells are adjusted, the water injection amount of the horizontal well network after the unstable alternate production method for facing the horizontal well network provided by the embodiment of the invention is consistent with the previous water injection amount.

On the basis of the above embodiments, further, the reducing the production rate of the production wells in the even rows and the increasing the production rate of the production wells in the odd rows includes:

reducing the yield of the oil production wells in the even rows to 0.7-0.9 times of the previous yield, and improving the yield of the oil production wells in the odd rows to 1.1-1.3 times of the previous yield.

Specifically, when the first oil producing step is performed, the production rate of the even-column oil producing wells may be reduced to 0.7 to 0.9 times the previous production rate of the even-column oil producing wells, and the production rate of the odd-column oil producing wells may be increased to 1.1 to 1.3 times the previous production rate of the odd-column oil producing wells. When the yield of the even-numbered rows of oil production wells and the yield of the odd-numbered rows of oil production wells are adjusted, the yield of the horizontal well pattern after the unstable alternating production method for the right horizontal well pattern provided by the embodiment of the invention is adopted can be consistent with the previous yield. By reducing the yield of the oil production wells in the even rows and increasing the yield of the oil production wells in the odd rows, more injected water can flow from the water injection wells in the even rows to the oil production wells in the odd rows, the spread volume of the injected water is enlarged, and the residual oil is favorably exploited.

On the basis of the foregoing embodiments, further, the reducing the water injection amount of the even-numbered columns of water injection wells and the increasing the water injection amount of the odd-numbered columns of water injection wells includes:

and reducing the water injection amount of the even-numbered rows of water injection wells to 0.4-0.6 times of the previous water injection amount, and increasing the water injection amount of the odd-numbered rows of water injection wells to 1.4-1.6 times of the previous water injection amount.

Specifically, when the second oil extraction step is performed, the water injection amount of the even-numbered rows of water injection wells may be reduced to 0.4 to 0.6 times of the water injection amount before the even-numbered rows of water injection wells, and the water injection amount of the odd-numbered rows of water injection wells may be increased to 1.4 to 1.6 times of the water injection amount before the odd-numbered rows of water injection wells. When the water injection amount of the odd-numbered rows of water injection wells and the water injection amount of the even-numbered rows of water injection wells are adjusted, the water injection amount of the horizontal well network after the unstable alternate production method for facing the horizontal well network provided by the embodiment of the invention is consistent with the previous water injection amount.

On the basis of the above embodiments, further, the reducing the production rate of the production wells in the odd columns and the increasing the production rate of the production wells in the even columns includes:

reducing the yield of the odd-numbered rows of oil production wells to 0.7-0.9 times of the previous yield, and improving the yield of the even-numbered rows of oil production wells to 1.1-1.3 times of the previous yield.

Specifically, when the second oil producing step is performed, the production rate of the odd-numbered rows of oil producing wells may be reduced to 0.7 to 0.9 times the previous production rate of the odd-numbered rows of oil producing wells, and the production rate of the even-numbered rows of oil producing wells may be increased to 1.1 to 1.3 times the previous production rate of the even-numbered rows of oil producing wells. When the yield of the even-numbered rows of oil production wells and the yield of the odd-numbered rows of oil production wells are adjusted, the yield of the horizontal well pattern after the unstable alternating production method for the right horizontal well pattern provided by the embodiment of the invention is adopted can be consistent with the previous yield. By reducing the yield of the odd-numbered rows of oil production wells and increasing the yield of the even-numbered rows of oil production wells, more injected water can flow from the odd-numbered rows of water injection wells to the even-numbered rows of oil production wells, the spread volume of the injected water is enlarged, and the residual oil is favorably exploited.

On the basis of the above embodiments, further, the first operation period and the second operation period are equal, the first operation period is greater than or equal to 30 days and less than or equal to 180 days, and the formation pressure is maintained stable in the alternate water injection period formed by the first operation period and the second operation period.

Specifically, the first operating period and the second operating period relate to injection-production well spacing, discharge spacing and reservoir heterogeneity, the first operating period and the second operating period may be set to be equal to each other, and the first operating period is greater than or equal to 30 days and less than or equal to 180 days, specifically set according to an actual situation, which is not limited in the embodiment of the present invention, and the second operating period is greater than or equal to 30 days and less than or equal to 180 days, specifically set according to an actual situation, which is not limited in the embodiment of the present invention. The first operation period and the second operation period form an alternate water injection period, in the alternate water injection period, the formation pressure needs to be maintained to be stable, and the formation pressure can be maintained to be stable by keeping the injection-production ratio of the horizontal well pattern to be the same as the injection-production ratio before the method for alternately exploiting the oil based on the reverse-looking seven-point method of the opposite horizontal well pattern provided by the embodiment of the invention.

The unstable alternative mining method for the horizontal well pattern provided by the embodiment of the invention has been tested in the water injection development of a certain carbonate reservoir, and the specific implementation process is explained below.

The above-mentioned certain carbonate oil reservoir is the weak limit water oil reservoir of structure, and the vertical heterogeneity of reservoir stratum is strong, the inside hypertonic strip that exists, and water injection sweep efficiency is low in the development process, and water drive reserves uses the effect poor. The above-mentioned some carbonate oil is hidden under the low extraction degree and has been fully met with water, most of oil wells have short waterless oil extraction period, after meeting with water, the water content is quickly raised, and under the condition of that the extraction degree of partial region is less than 15%, the water content is up to 60% -80%.

According to the selection principle of the horizontal well pattern, selecting a certain high water-containing well group in the south of the certain carbonate reservoir as the horizontal well pattern to implement the unstable alternative mining method for the horizontal well pattern, which is provided by the embodiment of the invention. The high water-cut well group is a linear well pattern which is just opposite to the horizontal well, and comprises three rows and seven columns of injection and production wells, namely two rows of oil production wells in the south and north and one row of water injection wells in the middle, each row of oil production wells/water injection wells comprises 7 wells, the high water-cut well group is positioned in an area with good physical properties at a high part of an oil reservoir structure, and the single well control reserve is high. However, because the high permeability zone near the production horizon of the oil production well generally develops, injected water rapidly enters the production well along the high permeability channel, so that before the unstable alternate production method for facing the horizontal well pattern provided by the embodiment of the invention is implemented, the production degree of a certain high water-containing well group is only 12%, the water content is as high as 60%, more residual oil exists in the certain high water-containing well group, and the adjustment potential is still very large.

Setting the first operation period and the second operation period to be 30 days, wherein the first operation period and the second operation period are alternately carried out, and the first operation period and the second operation period form an alternate water injection period. And controlling a certain high water-cut well group to execute the first oil exploitation step in the first operation period, namely reducing the water injection amount of the odd-numbered rows of water injection wells of the certain high water-cut well group to about 0.5 time of the original water injection amount, improving the water injection amount of the even-numbered rows of water injection wells of the certain high water-cut well group to about 1.5 times of the original water injection amount, reducing the yield of the even-numbered rows of oil exploitation wells of the certain high water-cut well group to about 0.8 time of the original yield and improving the yield of the odd-numbered rows of oil exploitation wells of the certain high water-cut well group to about 1.2 times of the original yield. And in the second operation period, controlling a certain high water-cut well group to execute the second oil exploitation step, namely reducing the water injection amount of the even-numbered rows of water injection wells of the certain high water-cut well group to about 0.5 time of the original water injection amount, increasing the water injection amount of the odd-numbered rows of water injection wells of the certain high water-cut well group to about 1.5 times of the original water injection amount, reducing the yield of the odd-numbered rows of oil exploitation wells of the certain high water-cut well group to about 0.8 time of the original yield and increasing the yield of the even-numbered rows of oil exploitation wells of the certain high water-cut well group to about 1.2 times of the original yield.

And in each alternate water injection period, performing differential water injection on the water injection well in the first operation period and the second operation period, and performing differential production on the oil production well. Through the adjustment of the periodical water injection intensity difference of the water injection well and the adjustment of the liquid production intensity difference of the oil production well, unstable pressure response and an injection and production flow line are formed in the stratum, and the regular periodical alternate displacement of the injected water in different periods changes the fixed liquid flow direction formed in the original stable water injection process, so that the development effect of improving the water flooding wave and the volume is achieved. After a certain high water-cut well group is alternately injected and produced and converted in the first operation period and the second operation period, the injection and production strength and the flow line at the same position are changed, so that the water-cut rising speed is effectively delayed, and the effects of stabilizing oil and controlling water are achieved.

The unstable alternate mining method for the horizontal well pattern provided by the embodiment of the invention is implemented from 8 months in 2018 for a certain high water-cut well group, through 4 alternate water injection periods, the daily average oil production increment of the certain high water-cut well group reaches more than 2000 barrels per day, the comprehensive water content is reduced by more than 10%, and the expected effects of water control and oil stabilization are achieved. Fig. 6 is a comparison graph of oil exploitation of a high water content well group according to an embodiment of the present invention, and as shown in fig. 6, from the field implementation effect, the daily oil yield after the unstable alternative exploitation method for the horizontal well network according to the embodiment of the present invention is implemented is significantly higher than the original daily oil yield prediction curve (daily oil yield decreasing trend line), after the unstable alternative exploitation method for the horizontal well network according to the embodiment of the present invention is implemented for a high water content well group, the daily oil yield reaches 2000 barrels per day or more, the comprehensive water content is lower than the water content increasing trend line, the comprehensive water content is in a descending trend, and the comprehensive water content is reduced by 10% or more.

It can be understood that the unstable alternative mining method against the horizontal well pattern provided by the embodiment of the present invention can be tried before the unstable alternative mining method against the horizontal well pattern provided by the embodiment of the present invention is put into practical use formally. In the trial process, after a first operation period and a second operation period are completed, the effect of the horizontal well pattern on the unstable alternative mining method for the horizontal well pattern provided by the embodiment of the invention is evaluated, namely the petroleum yield before and after the unstable alternative mining method for the horizontal well pattern provided by the embodiment of the invention is compared. If the oil yield of three continuous alternate water injection periods is higher than that of the previous oil yield, the unstable alternate mining method for facing the horizontal well pattern provided by the embodiment of the invention has better effect and can be implemented. According to the actual conditions, the water injection amount of the water injection well, the yield of the oil production well, the first operation period and the second operation period can be adjusted, so that a better development effect is obtained. The adjustment of the water injection amount of the water injection well, the yield of the oil production well and the first operation period and the second operation period can be carried out before practical application, and the parameters are continuously adjusted by combining with the production dynamic analysis of a practical horizontal well pattern in the specific implementation process. The unstable alternate mining method facing the horizontal well pattern provided by the embodiment of the invention is a beneficial technology for water injection development and adjustment of the whole horizontal well pattern, has important significance for water injection development and adjustment of the horizontal well of the carbonate rock oil reservoir with strong heterogeneity, and is suitable for both the similar continental facies or sea facies sandstone oil reservoir and the similar carbonate rock oil reservoir at home and abroad.

Fig. 7 is a schematic structural diagram of an unstable alternative mining apparatus facing a horizontal well pattern according to an embodiment of the present invention, and as shown in fig. 7, the unstable alternative mining apparatus facing a horizontal well pattern according to an embodiment of the present invention includes a first control device 701 and a second control device 702, where:

the first control device 701 is used for controlling the horizontal well pattern to execute a first oil exploitation step in a first operation period, wherein the first oil exploitation step comprises reducing the water injection amount of the odd-numbered rows of water injection wells and increasing the water injection amount of the even-numbered rows of water injection wells, and reducing the yield of the even-numbered rows of oil production wells and increasing the yield of the odd-numbered rows of oil production wells; the horizontal well pattern is preset and comprises at least three rows and three columns of injection and production wells; the second control device 702 is configured to control the horizontal well pattern to perform a second oil production step in a second operation cycle, where the second oil production step includes reducing the water injection amount of the even-numbered rows of water injection wells and increasing the water injection amount of the odd-numbered rows of water injection wells, and reducing the yield of the odd-numbered rows of oil production wells and increasing the yield of the even-numbered rows of oil production wells; the first oil producing step and the second oil producing step are alternately performed;

specifically, in a first operation cycle, the first control device 701 controls the horizontal well pattern to perform a first oil exploitation step, that is, the water injection amount of the odd-numbered rows of water injection wells of the horizontal well pattern is reduced, the water injection amount of the even-numbered rows of water injection wells of the horizontal well pattern is increased, and the production of the even-numbered rows of oil production wells of the horizontal well pattern is reduced, and the production of the odd-numbered rows of oil production wells of the horizontal well pattern is increased. The horizontal well pattern is preset and comprises at least three rows and three columns of injection and production wells, wherein the injection and production wells refer to a water injection well and a production well. The reduction of the water injection amount of the odd-numbered rows of water injection wells and the improvement of the water injection amount of the even-numbered rows of water injection wells are set according to actual conditions, and the embodiment of the invention is not limited. The reduction of the yield of the production wells in the even rows and the increase of the yield of the production wells in the odd rows are set according to actual conditions, and the embodiment of the invention is not limited.

In a second operation cycle, the second control device 702 controls the horizontal well pattern to perform a second oil production step, i.e., to reduce the water injection amount of the even-numbered rows of water injection wells and increase the water injection amount of the odd-numbered rows of water injection wells, and to reduce the production of the odd-numbered rows of oil production wells and increase the production of the even-numbered rows of oil production wells. After the execution of the second operation period is finished, the first operation period is repeated, the horizontal well pattern is controlled to execute a first oil exploitation step, then the second operation period is repeated, the horizontal well pattern is controlled to execute a second oil exploitation step, and the first oil exploitation step and the second oil exploitation step are executed alternately. The amount of reduction of the water injection amount of the even-numbered rows of water injection wells and the amount of increase of the water injection amount of the odd-numbered rows of water injection wells are set according to actual conditions, and the embodiment of the invention is not limited. The reduction of the yield of the odd-numbered rows of oil production wells and the increase of the yield of the even-numbered rows of oil production wells are set according to actual conditions, and the embodiment of the invention is not limited.

The unstable alternative exploitation device for facing a horizontal well network provided by the embodiment of the invention controls the horizontal well network to execute a first oil exploitation step in a first operation period, and then controls the horizontal well network to execute a second oil exploitation step in a second operation period, wherein the first oil exploitation step comprises reducing the water injection amount of water injection wells in odd columns and increasing the water injection amount of water injection wells in even columns, and reducing the yield of oil exploitation wells in even columns and increasing the yield of oil exploitation wells in odd columns, the second oil exploitation step comprises reducing the water injection amount of water injection wells in even columns and increasing the water injection amount of water injection wells in odd columns, and reducing the yield of oil exploitation wells in odd columns and increasing the yield of oil exploitation wells in even columns, the first oil exploitation step and the second oil exploitation step are alternately executed, and through the adjustment of the water injection wells and the oil exploitation wells in the first oil exploitation step and the second oil exploitation step, the displacement direction of the injection and production flow line is changed, the sweep coefficient is obviously improved, the utilization rate of injected water of a horizontal well pattern is effectively improved, the sweep coefficient is improved, the exploitation of residual oil is facilitated, and the oil field recovery ratio is improved. In addition, in the process of well pattern alternate water injection, the injection amount is periodically changed, an unstable pressure field is generated in the stratum, and oil and water in the stratum are continuously exchanged and distributed again, so that the effects of improving the longitudinal sweep efficiency and improving the interlayer balance exploitation are achieved.

Fig. 8 is a schematic structural diagram of an unstable alternating production apparatus facing a horizontal well pattern according to another embodiment of the present invention, and as shown in fig. 8, the unstable alternating production apparatus facing a horizontal well pattern according to the embodiment of the present invention includes a third control device 801 and a fourth control device 802, where:

the third control device 801 is used for controlling the horizontal well pattern to execute the second oil exploitation step in the first operation period, wherein the second oil exploitation step comprises reducing the water injection amount of the even-numbered rows of water injection wells and increasing the water injection amount of the odd-numbered rows of water injection wells, and reducing the yield of the odd-numbered rows of oil exploitation wells and increasing the yield of the even-numbered rows of oil exploitation wells; the horizontal well pattern is preset and comprises at least three rows and three columns of injection and production wells; the fourth control device 802 is configured to control the horizontal well network to perform the first oil production step in the second operation cycle, where the first oil production step includes reducing the water injection amount of the odd-numbered rows of water injection wells and increasing the water injection amount of the even-numbered rows of water injection wells, and reducing the yield of the even-numbered rows of oil production wells and increasing the yield of the odd-numbered rows of oil production wells; the first oil producing step and the second oil producing step are alternately performed.

Specifically, in the first operation period, the third control device 801 controls the horizontal well pattern to perform a second oil production step, that is, to reduce the water injection amount of the even-numbered rows of water injection wells and increase the water injection amount of the odd-numbered rows of water injection wells, and to reduce the production of the odd-numbered rows of oil production wells and increase the production of the even-numbered rows of oil production wells.

In the second operation period, the fourth control device 802 controls the horizontal well pattern to execute a first oil exploitation step, that is, the water injection amount of the odd-numbered rows of the horizontal well pattern is closed and the water injection amount of the even-numbered rows of the horizontal well pattern is increased, and the yield of the even-numbered rows of the horizontal well pattern is reduced and the yield of the odd-numbered rows of the horizontal well pattern is increased. After the execution of the second operation period is finished, the first operation period is repeated, the horizontal well pattern is controlled to execute a first oil exploitation step, then the second operation period is repeated, the horizontal well pattern is controlled to execute a second oil exploitation step, and the first oil exploitation step and the second oil exploitation step are executed alternately.

The unstable alternative exploitation device for facing a horizontal well network provided by the embodiment of the invention controls the horizontal well network to execute a second oil exploitation step in a first operation period, then controls the horizontal well network to execute a first oil exploitation step in a second operation period, wherein the first oil exploitation step comprises reducing the water injection amount of an odd-numbered row of water injection wells and increasing the water injection amount of an even-numbered row of water injection wells, and reducing the yield of an even-numbered row of oil exploitation wells and increasing the yield of an odd-numbered row of oil exploitation wells, the second oil exploitation step comprises reducing the water injection amount of the even-numbered row of water injection wells and increasing the water injection amount of the odd-numbered row of water injection wells, and reducing the yield of the odd-numbered row of oil exploitation wells and increasing the yield of the even-numbered row of oil exploitation wells, the first oil exploitation step and the second oil exploitation step are alternately executed, and the water injection wells and the oil exploitation wells are adjusted in the first oil exploitation, the displacement direction of the injection and production flow line is changed, the sweep coefficient is obviously improved, the utilization rate of injected water of a horizontal well pattern is effectively improved, the sweep coefficient is improved, the exploitation of residual oil is facilitated, and the oil field recovery ratio is improved. In addition, in the process of well pattern alternate water injection, the injection amount is periodically changed, an unstable pressure field is generated in the stratum, and oil and water in the stratum are continuously exchanged and distributed again, so that the effects of improving the longitudinal sweep efficiency and improving the interlayer balance exploitation are achieved.

The embodiment of the apparatus provided in the embodiment of the present invention may be specifically configured to execute the processing flows of the above method embodiments, and the functions of the apparatus are not described herein again, and refer to the detailed description of the above method embodiments.

Fig. 9 is a schematic physical structure diagram of an electronic device according to an embodiment of the present invention, and as shown in fig. 9, the electronic device may include: a processor (processor)901, a communication Interface (Communications Interface)902, a memory (memory)903 and a communication bus 904, wherein the processor 901, the communication Interface 902 and the memory 903 are communicated with each other through the communication bus 904. The processor 901 may call logic instructions in the memory 903 to perform the following method: controlling a horizontal well pattern to execute a first oil exploitation step in a first operation period; the horizontal well pattern is preset and comprises at least three rows and three columns of injection and production wells; controlling the horizontal well pattern to perform a second oil production step in a second operation period; or, in the first operation period, controlling the horizontal well pattern to perform the second oil production step; controlling the horizontal well pattern to perform the first oil production step during the second operational period; the first oil extraction step comprises the steps of reducing the water injection amount of the odd-numbered rows of water injection wells, improving the water injection amount of the even-numbered rows of water injection wells, reducing the yield of the even-numbered rows of oil production wells and improving the yield of the odd-numbered rows of oil production wells; the second oil extraction step comprises reducing the water injection amount of the even-numbered rows of water injection wells and increasing the water injection amount of the odd-numbered rows of water injection wells, and reducing the yield of the odd-numbered rows of oil production wells and increasing the yield of the even-numbered rows of oil production wells; the first oil producing step and the second oil producing step are alternately performed.

In addition, the logic instructions in the memory 903 may be implemented in a software functional unit and stored in a computer readable storage medium when the logic instructions are sold or used as a separate product. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

The present embodiment discloses a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the method provided by the above-mentioned method embodiments, for example, comprising: controlling a horizontal well pattern to execute a first oil exploitation step in a first operation period; the horizontal well pattern is preset and comprises at least three rows and three columns of injection and production wells; controlling the horizontal well pattern to perform a second oil production step in a second operation period; or, in the first operation period, controlling the horizontal well pattern to perform the second oil production step; controlling the horizontal well pattern to perform the first oil production step during the second operational period; the first oil extraction step comprises the steps of reducing the water injection amount of the odd-numbered rows of water injection wells, improving the water injection amount of the even-numbered rows of water injection wells, reducing the yield of the even-numbered rows of oil production wells and improving the yield of the odd-numbered rows of oil production wells; the second oil extraction step comprises reducing the water injection amount of the even-numbered rows of water injection wells and increasing the water injection amount of the odd-numbered rows of water injection wells, and reducing the yield of the odd-numbered rows of oil production wells and increasing the yield of the even-numbered rows of oil production wells; the first oil producing step and the second oil producing step are alternately performed.

The present embodiment provides a computer-readable storage medium, which stores a computer program, where the computer program causes the computer to execute the method provided by the above method embodiments, for example, the method includes: controlling a horizontal well pattern to execute a first oil exploitation step in a first operation period; the horizontal well pattern is preset and comprises at least three rows and three columns of injection and production wells; controlling the horizontal well pattern to perform a second oil production step in a second operation period; or, in the first operation period, controlling the horizontal well pattern to perform the second oil production step; controlling the horizontal well pattern to perform the first oil production step during the second operational period; the first oil extraction step comprises the steps of reducing the water injection amount of the odd-numbered rows of water injection wells, improving the water injection amount of the even-numbered rows of water injection wells, reducing the yield of the even-numbered rows of oil production wells and improving the yield of the odd-numbered rows of oil production wells; the second oil extraction step comprises reducing the water injection amount of the even-numbered rows of water injection wells and increasing the water injection amount of the odd-numbered rows of water injection wells, and reducing the yield of the odd-numbered rows of oil production wells and increasing the yield of the even-numbered rows of oil production wells; the first oil producing step and the second oil producing step are alternately performed.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

In the description herein, reference to the description of the terms "one embodiment," "a particular embodiment," "some embodiments," "for example," "an example," "a particular example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. An unstable alternative mining method for facing a horizontal well pattern, comprising:

2. The method of claim 1, wherein the reducing the water injection amount for the odd numbered columns of water injection wells and the boosting the water injection amount for the even numbered columns of water injection wells comprises:

3. The method of claim 1, wherein reducing production from production wells in even columns and increasing production from production wells in odd columns comprises:

4. The method of claim 1, wherein the reducing the water injection amount of the even columns of water injection wells and the boosting the water injection amount of the odd columns of water injection wells comprises:

5. The method of claim 1, wherein the reducing production from the odd columns of production wells and the increasing production from the even columns of production wells comprises:

6. The method of any one of claims 1 to 5, wherein the first and second operational periods are equal, wherein the first operational period is greater than or equal to 30 days and less than or equal to 180 days, and wherein a stable formation pressure is maintained during alternating water injection periods comprised by the first and second operational periods.

7. An unstable alternate mining device for a well pattern of a horizontal well, comprising:

8. The apparatus of claim 7, wherein the reducing the water injection amount for the odd numbered columns of water injection wells and the boosting the water injection amount for the even numbered columns of water injection wells comprises:

9. The apparatus of claim 7, wherein the reducing production from the production wells in the even columns and increasing production from the production wells in the odd columns comprises:

10. The apparatus of claim 7, wherein the reducing the water injection amount of the even columns of water injection wells and the boosting the water injection amount of the odd columns of water injection wells comprises:

11. The apparatus of claim 7, wherein the reducing production from the odd columns of production wells and the increasing production from the even columns of production wells comprises:

12. The apparatus of any one of claims 7 to 11, wherein the first and second operational periods are equal, the first operational period is equal to or greater than 30 days and equal to or less than 180 days, and a steady formation pressure is maintained during the alternating water injection periods formed by the first and second operational periods.

13. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the steps of the method of any of claims 1 to 6 are implemented when the computer program is executed by the processor.

14. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 6.