CN115370334A - Steam injection adjusting method for reducing oil reservoir steam channeling - Google Patents
Steam injection adjusting method for reducing oil reservoir steam channeling Download PDFInfo
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- CN115370334A CN115370334A CN202110551757.XA CN202110551757A CN115370334A CN 115370334 A CN115370334 A CN 115370334A CN 202110551757 A CN202110551757 A CN 202110551757A CN 115370334 A CN115370334 A CN 115370334A
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- 230000005465 channeling Effects 0.000 title claims abstract description 230
- 238000010793 Steam injection (oil industry) Methods 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000003129 oil well Substances 0.000 claims abstract description 73
- 238000009826 distribution Methods 0.000 claims abstract description 64
- 238000004519 manufacturing process Methods 0.000 claims abstract description 36
- 238000002347 injection Methods 0.000 claims description 22
- 239000007924 injection Substances 0.000 claims description 22
- 238000010521 absorption reaction Methods 0.000 claims description 16
- 230000035699 permeability Effects 0.000 claims description 13
- 230000000903 blocking effect Effects 0.000 claims description 2
- 239000000446 fuel Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 6
- 238000010795 Steam Flooding Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000009828 non-uniform distribution Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/30—Specific pattern of wells, e.g. optimizing the spacing of wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
Abstract
The invention relates to the technical field of adjusting interbedded reservoir steam channeling, in particular to a steam injection adjusting method for reducing reservoir steam channeling, which comprises the following steps: acquiring a plane distribution state of the oil reservoir based on the geological information; acquiring a longitudinal distribution state of an oil reservoir based on geological information; determining the steam channeling type of the oil well according to the plane distribution state and the longitudinal distribution state of the oil reservoir; and determining an injection-production mode based on the steam channeling type. The injection-production mode is determined according to the plane and longitudinal distribution actual conditions of the oil reservoir which are adjusted more reasonably as required, and a temperature field is established in a concentrated mode, so that the temperature and the pressure of the oil reservoir are balanced, the influence of steam channeling is restrained in a targeted mode, the utilization rate of injected steam into the oil reservoir is improved, the effect of steam-drive oil production is improved, and the use cost of the steam is reduced.
Description
Technical Field
The invention relates to the technical field of adjusting interbedded oil reservoir steam channeling, in particular to a steam injection adjusting method for reducing oil reservoir steam channeling.
Background
When the interbed oil reservoir is subjected to steam-driven exploitation, a steam channeling reaction is very easy to occur in the huff-and-puff process, the steam channeling degree is increased along with the huff-and-puff cycle, the steam channeling degree is gradually deepened, and the huff-and-puff effect is rapidly worsened due to serious steam channeling. Because the oil well is short in handling period and frequent in steam injection due to scattered operation modes, when steam is injected into adjacent wells of the oil well, the liquid production of the production well is correspondingly increased, the water content is continuously increased, the temperature of a well head is continuously increased, once steam channeling is serious, the water production of the production well is severely increased when the steam is injected into the adjacent wells, even the water content is close to 100%, and the steam-driven exploitation effect is seriously influenced. At present, no method for effectively reducing the steam channeling of a interbed oil reservoir exists, so that the invention of a steam injection adjusting method for reducing the steam channeling of the oil reservoir is necessary.
Disclosure of Invention
Embodiments of the present invention are directed to solving at least one of the problems in the prior art or related art.
Therefore, the embodiment of the invention aims to provide a steam injection adjusting method for reducing the reservoir steam channeling.
In order to achieve the above object, the technical solution of the present invention provides a method for adjusting steam injection to reduce reservoir steam channeling, which comprises:
acquiring a plane distribution state of the oil reservoir based on the geological information;
acquiring a longitudinal distribution state of an oil reservoir based on geological information;
determining the steam channeling type of the oil well according to the plane distribution state and the longitudinal distribution state of the oil reservoir;
and determining an injection-production mode based on the steam channeling type.
In addition, the method for adjusting the steam injection for reducing the reservoir steam channeling in the technical scheme provided by the embodiment of the invention can also have the following additional technical characteristics:
in one technical scheme of the invention, the step of acquiring the plane distribution state of the oil reservoir comprises the following steps:
acquiring the development condition of the oil reservoir and the logging information of the oil reservoir based on the geological information;
and determining the plane distribution state of the oil reservoir according to the development condition of the oil reservoir and the logging information.
In one technical scheme of the invention, the step of acquiring the longitudinal distribution state of the oil reservoir comprises the following steps: acquiring permeability information and porosity information of an oil reservoir, and establishing an oil reservoir longitudinal model according to the permeability information and the porosity information of the oil reservoir;
and acquiring the longitudinal distribution state of the oil reservoir based on the oil reservoir longitudinal model.
In one technical scheme of the invention, the step of determining the steam channeling type of the oil well according to the plane distribution state and the longitudinal distribution state of the oil reservoir comprises the following steps:
acquiring a steam channeling oil well generating a steam channeling state phenomenon and a steam injection well providing steam for the steam channeling oil well;
judging whether the steam channeling oil well comprises a horizontal well or not based on the plane distribution state;
judging whether the gas channeling oil well comprises a vertical well or not based on the longitudinal distribution state;
when the steam injection well is a vertical well, the steam channeling oil well is a horizontal well, or the steam injection well is a horizontal well, and the steam channeling oil well is a vertical well, the steam channeling type is horizontal and vertical combined steam channeling;
when the steam injection well is a vertical well and the steam channeling oil well is a vertical well, the steam channeling type is vertical steam channeling;
and under the condition that the steam injection well is a horizontal well and the steam channeling oil well is a horizontal well, the steam channeling type is horizontal steam channeling.
In one technical scheme of the invention, the method for adjusting the steam injection for reducing the oil reservoir steam channeling is characterized in that the step of determining the injection and production mode based on the steam channeling type comprises the following steps:
when the steam channeling type is horizontal steam channeling, performing injection and production in a mode of combining a plurality of horizontal wells;
when the steam channeling type is vertical steam channeling, injection and production are carried out through a mode of combining a plurality of vertical wells;
and when the steam channeling type is horizontal and vertical combined steam channeling, injecting and extracting through a mode of combining a plurality of horizontal wells and a plurality of vertical wells.
In one embodiment of the present invention, the method for adjusting steam injection to reduce the reservoir steam channeling further comprises:
acquiring the utilization degree and the well section temperature of an oil well;
determining whether the horizon to which the oil well belongs is a steam channeling horizon based on at least one of the mobilization degree and the interval temperature of the oil well;
and under the condition that the horizon is the steam channeling horizon, the steam channeling horizon is blocked.
In one aspect of the present invention, the step of determining a steam channeling horizon for an oil well based on at least one of a utilization level of the oil well and a temperature of a wellbore section comprises:
detecting interval temperatures within each interval of the horizontal well;
and when the difference value between the maximum well section temperature and the minimum well section temperature in the obtained well section temperatures is more than 20 ℃, determining that the layer where the horizontal well is located is a steam channeling layer.
In one aspect of the present invention, the step of determining a steam channeling horizon of the oil well based on the mobilization degree of the oil well further comprises:
detecting a steam absorption profile of the vertical well to obtain the steam absorption amount;
and when the steam absorption amount is greater than 10% of the steam injection amount, determining that the position of the vertical well is a steam channeling position.
In one embodiment of the present invention, the method for adjusting steam injection to reduce the reservoir steam channeling further includes:
in the case of a horizon that is a non-channeling horizon;
acquiring the utilization degree of the non-steam channeling horizon;
determining the steam injection amount of the non-steam channeling layer based on the utilization degree of the non-steam channeling layer;
wherein the utilization degree of the non-steam channeling layer is in inverse proportion to the steam injection quantity.
In one embodiment of the present invention, the method for adjusting steam injection to reduce the reservoir steam channeling further includes:
and performing layered steam injection on the steam channeling layer and the non-steam channeling layer.
Compared with the prior art, the invention at least comprises the following beneficial effects:
the invention provides a steam injection adjusting method for reducing oil reservoir steam channeling, which is used for acquiring a plane distribution state of an oil reservoir based on geological information; acquiring a longitudinal distribution state of an oil reservoir based on geological information; determining the steam channeling type of the oil well according to the plane distribution state and the longitudinal distribution state of the oil reservoir; based on the type of steam channeling, an injection-production mode is determined. The injection-production mode is determined according to the plane and longitudinal distribution actual conditions of the oil reservoir which are adjusted more reasonably as required, and a temperature field is established in a concentrated mode, so that the temperature and the pressure of the oil reservoir are balanced, the influence of steam channeling is restrained in a targeted mode, the utilization rate of injected steam into the oil reservoir is improved, the effect of steam-drive oil production is improved, and the use cost of the steam is reduced.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic flow chart illustrating a method for adjusting steam injection to reduce reservoir steam channeling according to an embodiment of the present invention.
Detailed Description
The present invention is further described in detail below with reference to the drawings and examples so that those skilled in the art can implement the invention with reference to the description.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or combinations thereof.
In one embodiment of the present invention, a method for adjusting steam injection to reduce reservoir steam channeling is provided, and referring to fig. 1, the method comprises: s610 to S640.
S610, acquiring a plane distribution state of the oil reservoir based on the geological information;
s620, acquiring the longitudinal distribution state of the oil reservoir based on the geological information;
s630, determining the steam channeling type of the oil well according to the plane distribution state and the longitudinal distribution state of the oil reservoir;
and S640, determining an injection-production mode based on the steam channeling type.
In the embodiment, the gas injection adjusting method for reducing the reservoir gas channeling obtains the plane distribution state of the reservoir based on geological information; acquiring a longitudinal distribution state of an oil reservoir based on geological information; determining the steam channeling type of the oil well according to the plane distribution state and the longitudinal distribution state of the oil reservoir; based on the type of steam channeling, an injection-production mode is determined. The injection-production mode is determined according to the planar and longitudinal distribution actual conditions of the oil reservoir which are adjusted more reasonably as required, the temperature field is set up in a centralized manner, the temperature and the pressure of the oil reservoir are balanced, the influence of steam channeling is restrained in a targeted manner, the utilization rate of injected steam in the oil reservoir is improved, the effect of steam-drive oil production is improved, the use cost of the steam is reduced, and the targeted tracking and regulation can be realized according to the planar distribution state and the longitudinal distribution state of the mined oil reservoir.
In one embodiment of the invention, the step of obtaining the planar distribution state of the oil reservoir comprises: acquiring the development condition of the oil reservoir and the logging information of the oil reservoir based on the geological information; and determining the plane distribution state of the oil reservoir according to the development condition of the oil reservoir and the logging information.
In this embodiment, the step of obtaining the planar distribution state of the reservoir includes: the development condition of the oil reservoir and the logging information of the oil reservoir are obtained according to the geological information of the oil reservoir needing to be mined, concretely, the thickness of an oil layer of the oil reservoir is obtained, the development condition is judged according to the thickness of the oil layer, the better the thickness of the oil layer is, the better the development condition of the oil layer is shown, the oil reservoir has a good development value, substances of the oil reservoir are collected in a logging mode, a geological profile is built accordingly, the oil layer state of the oil reservoir is analyzed, the development state and the distribution condition of each oil layer of the oil reservoir can be known, the position suitable for mining and the development quality of the oil reservoir can be clearly and accurately known, a foundation is laid for subsequently judging the steam channeling type of the oil reservoir and selecting an injection and production mode, and the selection of the injection and production mode is more targeted and accurate.
In one embodiment, according to geological information of a certain oil reservoir, the development condition of the oil reservoir and the logging information of the oil reservoir are obtained, the plane distribution state of the oil reservoir is confirmed to be the best western development condition, the thickness is mainly 10m to 20m, the maximum thickness is 30m, the oil reservoir is gradually thinned to the east until the oil reservoir becomes a dust layer, and the oil reservoir is thinned to the west until the oil reservoir becomes a water layer, so that the position suitable for exploitation of the oil reservoir and the development quality of the oil reservoir can be known.
In one embodiment of the invention, the step of obtaining the longitudinal distribution state of the reservoir comprises: acquiring permeability information and porosity information of an oil reservoir, and establishing an oil reservoir longitudinal model according to the permeability information and the porosity information of the oil reservoir; and acquiring the longitudinal distribution state of the oil reservoir based on the longitudinal oil reservoir model.
In this embodiment, the step of obtaining the longitudinal distribution state of the oil reservoir includes: acquiring permeability information and porosity information of the oil reservoir according to the detection of the oil reservoir, wherein because the oil reservoir in a layered manner is longitudinally complex, a longitudinal oil reservoir model is established according to the permeability information and the porosity information of the oil reservoir, so that the longitudinal distribution state of the oil reservoir can be seen, namely the longitudinal oil use condition of the oil reservoir is known, wherein the permeability of a longitudinal oil layer of the oil reservoir is relatively average, and the uniformity of the oil layer is good; and if the porosity of the oil reservoir longitudinal oil layer is more average, the oil layer uniformity is good, and the steam channeling contradiction is smaller. On the contrary, the permeability difference is larger, which shows that the longitudinal non-uniform distribution of the oil layer, the non-uniform oil layer can be along with the increase of the handling times of the oil well and the production of the oil well in the edge and difficult-to-use block, and the gas channeling contradiction is more prominent, so that the foundation can be laid for the subsequent judgment of the gas channeling type of the oil reservoir and the selection of the injection-production mode according to the longitudinal distribution state of the oil reservoir, and the selection of the injection-production mode is more targeted and accurate.
In one embodiment of the present invention, the step of determining the steam channeling species of the oil well based on the planar distribution state and the longitudinal distribution state of the oil reservoir includes: acquiring a steam channeling oil well generating a steam channeling state phenomenon and a steam injection well providing steam for the steam channeling oil well; judging whether the steam channeling oil well comprises a horizontal well or not based on the plane distribution state; determining whether the gas channeling oil well comprises a vertical well based on the longitudinal distribution state; when the steam injection well is a vertical well, the steam channeling oil well is a horizontal well, or the steam injection well is a horizontal well, and the steam channeling oil well is a vertical well, the steam channeling type is horizontal and vertical combined steam channeling; when the steam injection well is a vertical well and the steam channeling oil well is a vertical well, the steam channeling type is vertical steam channeling; and under the condition that the steam injection well is a horizontal well and the steam channeling oil well is a horizontal well, the steam channeling type is horizontal steam channeling.
In this embodiment, the step of determining the steam channeling species of the oil well based on the planar distribution state and the longitudinal distribution state of the oil reservoir includes: observing the steam-emitting phenomenon of an oil well, determining whether the oil well is a steam channeling oil well or not according to the steam-emitting phenomenon and the distribution of the oil well, specifically, judging whether the type of the steam-emitting oil well is a horizontal well or a vertical well, observing whether horizontal wells are adjacent to the plane of the steam-emitting oil well or vertical wells are communicated with the vertical wells in the longitudinal direction, and if the horizontal wells are adjacent to the plane of the steam-emitting oil well or the vertical wells are communicated with the vertical wells in the longitudinal direction, indicating that the steam-emitting oil well is the steam channeling oil well. And meanwhile, the type of the steam injection well for providing steam for the steam channeling oil well is obtained, and the steam injection well can be divided into a horizontal well and a vertical well according to the direction of the steam injection well. When the steam injection well is a vertical well, the steam channeling oil well is a horizontal well, or the steam injection well is a horizontal well and the steam channeling oil well is a vertical well, the steam channeling type is horizontal and vertical combined steam channeling; when the steam injection well is a vertical well and the steam channeling oil well is a vertical well, the steam channeling type is vertical steam channeling; and under the condition that the steam injection well is a horizontal well and the steam channeling oil well is a horizontal well, the steam channeling type is horizontal steam channeling. According to the plane distribution state and the longitudinal distribution state of the oil reservoir, the type of the steam channeling is determined, the injection-production mode can be selected according to the type of the steam channeling in a targeted manner, and the effect of reducing the steam channeling is more obvious.
In one embodiment of the present invention, a method for adjusting steam injection to reduce reservoir steam channeling is characterized in that the step of determining an injection-production mode based on a steam channeling category includes: when the steam channeling type is horizontal steam channeling, performing injection and production in a mode of combining a plurality of horizontal wells; when the steam channeling type is vertical steam channeling, injection and production are carried out in a mode of combining a plurality of vertical wells; and when the steam channeling type is horizontal and vertical combined steam channeling, injecting and extracting through a mode of combining a plurality of horizontal wells and a plurality of vertical wells.
In this embodiment, the step of determining the injection-production mode based on the steam channeling species includes: when the steam channeling type is horizontal steam channeling, injection and production are carried out in a mode of combining a plurality of horizontal wells; when the steam channeling type is vertical steam channeling, injection and production are carried out through a mode of combining a plurality of vertical wells; and when the steam channeling type is horizontal and vertical combined steam channeling, injecting and extracting through a mode of combining a plurality of horizontal wells and a plurality of vertical wells. The injection-production mode is determined, so that a temperature field can be intensively established aiming at different types of steam channeling, high-temperature steam is intensively heated, the temperature and the pressure are balanced, the influence of the steam channeling is effectively inhibited, and the utilization rate of steam injected into an oil layer is improved.
In an embodiment of the present invention, the method for adjusting injection of steam to reduce reservoir steam channeling further includes: acquiring the utilization degree and the well section temperature of an oil well; determining whether the horizon to which the oil well belongs is a steam channeling horizon based on at least one of the mobilization degree and the interval temperature of the oil well; and blocking the steam channeling horizon under the condition that the horizon is the steam channeling horizon.
In this embodiment, the method for adjusting the injection of steam to reduce the reservoir steam channeling further includes: acquiring the information of the oil well utilization degree and the temperature information of a well section, determining whether the layer position of the oil well belongs to is a steam channeling layer position according to at least one of the oil well utilization degree and the well section temperature, and plugging the steam channeling layer position when the layer position of the oil well belongs to is judged to be the steam channeling layer position. When the targeted injection and production are carried out on the steam channeling oil well of the oil reservoir, whether the steam channeling layer exists in the oil well of the oil reservoir is judged, the steam channeling oil layer existing in each oil well is more carefully blocked, the steam channeling is further prevented, and the utilization rate of steam injected into the oil layer is improved.
The mode that can understand the shutoff steam scurries the position can select the packer to carry out the shutoff for use, perhaps adopts high temperature resistant plugging agent to carry out the shutoff, and high temperature resistant plugging agent is after the solidification under the stratum condition, to steam scurries the position shutoff, can effectually reduce the emergence of steam scurring, has improved the utilization ratio of oil reservoir injected steam.
In one embodiment of the present invention, the step of determining a steam channeling horizon for the well based on at least one of a degree of mobilization and a temperature of the interval of the well comprises: detecting interval temperatures within each interval of the horizontal well; and when the difference value between the maximum well section temperature and the minimum well section temperature in the obtained well section temperatures is more than 20 ℃, determining that the layer where the horizontal well is located is a steam channeling layer.
In the embodiment, the steam channeling position of the horizontal well is determined according to the well section temperatures, specifically, the well section temperatures in each well section of the horizontal well are detected, the maximum well section temperature and the minimum well section temperature in the obtained well section temperatures are selected, the difference value between the maximum well section temperature and the minimum well section temperature is compared, and if the temperature difference value is greater than 20 ℃, the position of the horizontal well where the horizontal well is located is the steam channeling position, and the steam channeling position needs to be plugged. The position of steam channeling can be rapidly and stably determined through the temperature of the well section, and the working efficiency and the accuracy of judging the position of the steam channeling are improved.
In one embodiment of the present invention, the step of determining a steam channeling horizon for the well based on the level of mobilization of the well further comprises: detecting the steam absorption profile of the vertical well to obtain the steam absorption amount; and when the steam absorption amount is greater than 10% of the steam injection amount, determining that the layer position of the vertical well is a steam channeling layer position.
In this embodiment, the step of determining a steam channeling horizon for the well based on the level of mobilization of the well further comprises: the method comprises the steps of judging the utilization degree of a vertical well according to a steam absorption section of the vertical well, specifically, detecting the steam absorption section of the vertical well to obtain the steam absorption amount of the steam absorption section, judging whether the layer position of the vertical well is a steam channeling layer position or not according to the steam absorption amount, and when the steam absorption amount is larger than 10% of the steam injection amount, indicating that the utilization degree of an oil layer is high, and plugging the oil layer for a steam channeling oil layer. The position of can rapid and stable definite steam channeling through the degree of using of oil well has improved work efficiency and the accuracy of judging the steam channeling position.
It can be understood that the mobile degree of the oil layer can be judged according to parameters such as stratum coefficients and the permeability of the oil layer, and accordingly, the mobile degree is multi-directional and the steam channeling layer position is judged more accurately, wherein the stratum coefficients are larger, and the oil layer with higher permeability is easier to generate steam channeling.
In an embodiment of the present invention, the method for adjusting injection of steam to reduce reservoir steam channeling further includes: in the case of a horizon that is a non-channeling horizon; acquiring the utilization degree of the non-steam channeling layer; determining the steam injection amount of the non-steam channeling layer based on the utilization degree of the non-steam channeling layer; wherein the degree of utilization of the non-steam channeling place is inversely proportional to the amount of steam injection.
In this embodiment, the method for adjusting the injection of steam to reduce the reservoir steam channeling further includes: after the position of steam channeling is blocked, under the condition that the position is a non-steam channeling position, the utilization degree of the non-steam channeling position is obtained according to information such as stratum coefficients, steam absorption degree and permeability, the steam injection amount of the non-steam channeling position is determined according to the utilization degree of the non-steam channeling position, the higher the utilization degree is, the easier steam channeling occurs at the position, the steam injection amount of an oil layer with high utilization degree is reduced, and the steam injection amount of an oil layer with low utilization degree is increased. The influence of the heterogeneity of the oil layer on oil extraction is reduced, and the occurrence of steam channeling is effectively prevented.
In an embodiment of the present invention, the method for adjusting injection of steam to reduce reservoir steam channeling further includes: and performing layered steam injection on the steam channeling layer and the non-steam channeling layer.
In this embodiment, the notes vapour to steam channeling position and non-steam channeling position is separately, annotates vapour respectively to steam channeling position and non-steam channeling position, reduces the steam injection volume to the steam channeling position, prevents the emergence of steam channeling, increases the steam injection volume to non-steam channeling position for it is more reasonable to annotate the steam arrangement, can not cause the waste of steam, and the effectual emergence that prevents steam channeling.
In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically limited, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, the description of the terms "one embodiment," "some embodiments," "specific embodiments," 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 present invention. In the present invention, 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 description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for adjusting steam injection for reducing reservoir steam channeling is characterized by comprising the following steps:
acquiring a plane distribution state of an oil reservoir based on geological information;
acquiring a longitudinal distribution state of the oil reservoir based on geological information;
determining the steam channeling type of the oil well according to the plane distribution state and the longitudinal distribution state of the oil reservoir;
and determining an injection-production mode based on the steam channeling variety.
2. The method for adjusting steam injection for reducing reservoir steam channeling according to claim 1, wherein the step of obtaining the planar distribution state of the reservoir comprises:
acquiring the development condition of the oil reservoir and the logging information of the oil reservoir based on the geological information;
and determining the plane distribution state of the oil reservoir according to the development condition of the oil reservoir and the logging information.
3. The method for adjusting steam injection for reducing reservoir steam channeling according to claim 1, wherein the step of obtaining the longitudinal distribution state of the reservoir comprises:
acquiring permeability information and porosity information of the oil reservoir, and establishing an oil reservoir longitudinal model according to the permeability information and the porosity information of the oil reservoir;
and acquiring the longitudinal distribution state of the oil reservoir based on the oil reservoir longitudinal model.
4. The method for adjusting the steam injection for reducing the reservoir steam channeling according to claim 1, wherein: the step of determining the steam channeling type of the oil well according to the plane distribution state and the longitudinal distribution state of the oil reservoir comprises the following steps:
acquiring a steam channeling oil well generating a steam channeling state phenomenon and a steam injection well for providing steam for the steam channeling oil well;
judging whether the steam channeling oil well comprises a horizontal well or not based on the plane distribution state; determining whether the gas channeling oil well comprises a vertical well based on the longitudinal distribution state;
when the steam injection well is a vertical well, the steam channeling oil well is a horizontal well, or the steam injection well is a horizontal well, and the steam channeling oil well is a vertical well, the steam channeling type is horizontal and vertical combined steam channeling; when the steam injection well is a vertical well and the steam channeling oil well is a vertical well, the steam channeling type is vertical steam channeling; and under the condition that the steam injection well is a horizontal well and the steam channeling oil well is a horizontal well, the steam channeling type is horizontal steam channeling.
5. The method of adjusting injection of reducing reservoir steam channeling according to claim 1, wherein said step of determining an injection-production pattern based on said steam channeling species comprises:
when the steam channeling type is horizontal steam channeling, performing injection and production in a mode of combining a plurality of horizontal wells;
when the steam channeling type is vertical steam channeling, injection and production are carried out through a mode of combining a plurality of vertical wells;
and when the steam channeling type is horizontal and vertical combined steam channeling, injecting and extracting through a mode of combining a plurality of horizontal wells and a plurality of vertical wells.
6. The method for adjusting the injection of steam for reducing reservoir steam channeling as claimed in claim 1, further comprising:
acquiring the utilization degree and the well section temperature of the oil well;
determining whether a horizon to which the oil well belongs is a steam channeling horizon based on at least one of a mobilization degree and a interval temperature of the oil well;
and blocking the steam channeling layer under the condition that the layer is the steam channeling layer.
7. The method of adjusting for injection of steam to reduce reservoir steam channeling as claimed in claim 6, wherein said step of determining a steam channeling horizon for said well based on at least one of a degree of mobilization and a well interval temperature for said well comprises:
detecting interval temperatures within each interval of the horizontal well;
and when the difference value between the maximum well section temperature and the minimum well section temperature in the plurality of acquired well section temperatures is greater than 20 ℃, determining that the layer where the horizontal well is located is a steam channeling layer.
8. The method of adjusting injection of fuel to reduce reservoir channeling according to claim 6, wherein said step of determining a channeling horizon for said well based on the extent of exploitation of said well further comprises:
detecting a steam absorption profile of the vertical well to obtain the steam absorption amount; and when the steam absorption amount is more than 10% of the steam injection amount, determining that the layer position where the vertical well is located is a steam channeling layer position.
9. The method for adjusting steam injection for reducing reservoir steam channeling according to claim 7, further comprising:
under the condition that the horizon is a non-steam channeling horizon, acquiring the utilization degree of the non-steam channeling horizon;
determining the steam injection amount of the non-steam channeling layer based on the utilization degree of the non-steam channeling layer;
wherein the degree of mobilization of the non-steam channeling zone is inversely proportional to the amount of steam injection.
10. The method for adjusting steam injection for reducing reservoir steam channeling according to claim 7, further comprising:
and performing layered steam injection on the steam channeling layer and the non-steam channeling layer.
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| CN202110551757.XA CN115370334B (en) | 2021-05-20 | Steam injection adjusting method for reducing oil reservoir steam channeling |
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| CN202110551757.XA CN115370334B (en) | 2021-05-20 | Steam injection adjusting method for reducing oil reservoir steam channeling |
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