CN114109327A - Linkage profile control method for oil-water well - Google Patents
Linkage profile control method for oil-water well Download PDFInfo
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- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B43/20—Displacing by water
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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. optimising the spacing of wells
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Abstract
The invention provides an oil-water well linkage profile control method, which comprises the following steps: selecting a target well and a target oil well communicated with the target well as a profile control well group; and performing profile control operation on the target well, and simultaneously performing oil well linkage operation on the target well, wherein the oil well linkage operation comprises one or more of water plugging operation, oil extraction operation, reservoir transformation operation and sand prevention operation. The invention implements the oil-water well linkage comprehensive treatment technology on the oil-water well with better reservoir corresponding relation, implements the measures of the oil-water well at the same time, coordinates the production of the oil-water well, solves the problem that the residual oil between the oil-water wells cannot be effectively used, realizes the effective improvement of the water absorption profile of the water well and the liquid production profile of the oil well, increases the water injection swept area and improves the recovery ratio of the oil well.
Description
Technical Field
The invention relates to the technical field of oil extraction engineering, in particular to a linkage profile control method for an oil-water well.
Background
As the development of the oil field enters the middle and later stages, water injection invalid circulation is easily formed between oil wells with better connectivity during long-term water injection development, and the comprehensive water content of the oil well is high. The water well profile control process as a tertiary oil recovery technology plays a vital role in increasing and stabilizing the oil yield of an oil field. However, as the water well profile control work goes deeper, the water well with better yield stabilizing and increasing effect has been performed with multiple times of profile control, and no matter the near-end profile control or the deep profile control of the water well is performed, the water absorption profile improvement degree is gradually reduced, so that the profile control effect is continuously deteriorated.
Disclosure of Invention
The invention aims to provide a linkage profile control method for an oil-water well, which aims to solve the problem that the profile control effect is continuously poor due to the fact that the improvement degree of a water absorption profile is gradually reduced by profile control of a single well.
In order to achieve the purpose, the invention provides an oil-water well linkage profile control method, which comprises the following steps: selecting a target well and a target oil well communicated with the target well as a profile control well group; and performing profile control operation on the target well, and simultaneously performing oil well linkage operation on the target well, wherein the oil well linkage operation comprises one or more of water plugging operation, oil extraction operation, reservoir transformation operation and sand prevention operation.
The method of claim, wherein the performing the profile control operation on the target well comprises: selecting a profile control pipe column and determining a profile control process; lowering the profile control pipe column into the target well; and carrying out profile control operation on the target water well according to a predetermined profile control process.
The linkage profile control method for oil-water wells, wherein the selecting the profile control pipe column comprises: selecting a profile control pipe column according to the distribution condition of a high-permeability oil layer in the oil reservoir to be profiled, and selecting a general profile control pipe column when the distribution of the high-permeability oil layer in the oil reservoir to be profiled is single; when a high-permeability oil layer in an oil reservoir to be profile-controlled is distributed in an upper layer system and a lower layer system with different water absorption capacities, selecting an oil sleeve to be separately injected into a profile control pipe column; and when the high-permeability oil layer in the oil reservoir to be profile-controlled is distributed in a plurality of layer systems with different water absorption capacities, selecting a multi-stage separate injection profile control pipe column.
The linkage profile control method for oil-water wells according to claim, wherein the profile control string is an oil jacket separate injection profile control string, the oil jacket separate injection profile control string comprises an oil pipe, two water distributors arranged on the oil pipe, and a packer arranged on the oil pipe and located between the two water distributors, and the two water distributors correspond to two oil layers respectively.
The linkage profile control method for oil-water wells of claim, wherein the profile control string is a multi-stage separate injection profile control string, the multi-stage separate injection profile control string comprises an oil pipe, a plurality of water distributors arranged on the oil pipe, and a plurality of packers arranged on the oil pipe, the plurality of packers and the plurality of water distributors are alternately arranged from top to bottom, and the plurality of water distributors correspond to a plurality of oil layers respectively.
The linkage profile control method for oil-water wells according to claim, wherein the profile control process is a sectional alternate profile control process, the sectional alternate profile control process is used for profile control of a plurality of oil layers with different permeabilities of an oil reservoir to be profile controlled, and the sectional alternate profile control process comprises the following steps: determining the injection quantity and the injection concentration of the profile control agent required by each of the oil layers; respectively preparing profile control agents for the oil layers according to the injection amount and the injection concentration of the profile control agents which are determined in advance; and respectively injecting profile control agents with corresponding concentrations into the oil layers by adopting a mode of injecting the profile control agents and alternately injecting water until the injection amount of the profile control agents reaches the predetermined injection amount.
The linkage profile control method for oil-water wells, wherein the profile control process is an intermittent slug profile control process, the intermittent slug profile control process is used for profile control of an oil layer to be profile-controlled with a plurality of regions with different permeabilities, and the intermittent slug profile control process comprises the following steps: determining a plurality of injection concentrations of a profile control agent required by an oil layer to be profile controlled and injection amount corresponding to each injection concentration; preparing a profile control agent according to the predetermined injection concentration and injection quantity; according to the sequence of profile control agent injection concentration from high to low, the profile control is carried out on the oil layer to be subjected to profile control in multiple turns, and the step of profile control in each turn comprises the following steps: profile control agent is injected first, then well shut-in and coagulation waiting are carried out, and then water is injected.
The linkage profile control method for oil-water wells according to claim, wherein the profile control process is a multi-section plug composite profile control process, and the multi-section plug composite profile control process comprises a sectional alternate profile control process and an intermittent section plug profile control process; the sectional alternative profile control process comprises the following steps: determining the injection amount and the injection concentration of the profile control agent required by each of the oil layers; respectively preparing profile control agents for the oil layers according to the injection amount and the injection concentration of the profile control agents which are determined in advance; respectively injecting profile control agents with corresponding concentrations into the oil layers by adopting a mode of injecting profile control agents and alternately injecting water until the injection amount of the profile control agents reaches the predetermined injection amount; the intermittent slug profile control process comprises the following steps: determining the injection concentrations of various profile control agents required by an oil layer to be profile controlled and the injection amount corresponding to each injection concentration; preparing a profile control agent according to the predetermined injection concentration and injection quantity; according to the sequence of profile control agent injection concentration from high to low, the profile control is carried out on the oil layer to be subjected to profile control in multiple turns, and the step of profile control in each turn comprises the following steps: profile control agent is injected first, then well shut-in and coagulation waiting are carried out, and then water is injected.
The method of claim wherein said performing a well intervention operation simultaneously on said target well comprises: obtaining various production indexes of each target oil well, wherein the production indexes are obtained from each target oil well in early-stage exploitation, and the production indexes comprise a water outlet horizon, a sand production amount, a liquid production amount and a water content; determining the construction direction of each target oil well according to various production indexes of each target oil well, wherein the construction direction is water plugging, extract, reservoir transformation or sand prevention; and performing profile control operation on the target well, and simultaneously performing water plugging operation, oil extraction operation, reservoir transformation operation or sand prevention operation on each target well according to the predetermined construction direction.
The linkage profile control method for oil-water wells, wherein the water shutoff operation comprises mechanical water shutoff operation, intelligent water finding and shutoff operation and profile control and shutoff operation, and the reservoir transformation operation comprises acidification, fracturing and perforation.
The linkage profile control method of the oil-water well has the characteristics and advantages that:
the invention implements the oil-water well linkage comprehensive treatment technology on the oil-water well with better reservoir corresponding relation, implements the measures of the oil-water well at the same time, coordinates the production of the oil-water well, solves the problem that the residual oil between the oil-water wells cannot be effectively used, realizes the effective improvement of the water absorption profile of the water well and the liquid production profile of the oil well, increases the water injection swept area and improves the recovery ratio of the oil well.
Drawings
The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein:
FIG. 1 is a schematic diagram of a profile control well group to which the method of the present invention for controlling the linkage of oil and water wells is applied;
FIG. 2 is a schematic view of a general profile control string;
FIG. 3 is a schematic illustration of an oil jacket separate injection profile control string;
FIG. 4 is a schematic illustration of a multi-stage dispensing profile control string;
FIG. 5 is a flow chart of the linkage profile control method of the oil-water well of the present invention;
FIG. 6 is a flow chart of an embodiment of the present invention for performing a profile control operation on a target well;
FIG. 7 is a flow chart of an embodiment of performing well intervention operations on a target well in accordance with the present invention.
Main element number description:
1. a target well; 2. plugging a water and layering production well; 3. a liquid extraction well; 4. a reservoir modification well; 5. a sand control well;
6. an oil well pump; 7. a water blocking packer for an oil layer; 8. a large pump for deep pumping of the extract; 9. fracturing the tubular column;
10. rotating the sand control pump; 11. a sand control screen pipe; 12. an oil pipe; 13. a packer; 14. a water distributor;
100. an oil layer; 200. a technical sleeve; 300. and (4) a surface sleeve.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.
Aiming at the problem that the profile control effect of a single well is not ideal, the inventor changes the technical idea, takes a profile control well and a profile control well group formed by corresponding oil wells as an integral target, and provides an oil-water well linkage profile control method, as shown in figure 5, the method comprises the following steps:
step S1: selecting a target well and a target oil well communicated with the target well as a profile control well group;
step S2: and performing profile control operation on the target water well, and performing oil well linkage operation on the target oil well at the same time, wherein the oil well linkage operation comprises one or more of water plugging operation, oil extraction operation, reservoir transformation operation and sand prevention operation, such as two, three or four of the operations, so as to realize the combined profile control and yield increase of the oil-water well linkage.
The invention implements the oil-water well linkage comprehensive treatment technology on the oil-water well with better reservoir corresponding relation, implements the measures of the oil-water well at the same time, coordinates the production of the oil-water well, solves the problem that the residual oil between the oil-water wells cannot be effectively used, realizes the effective improvement of the water absorption profile of the water well and the liquid production profile of the oil well, increases the water injection swept area and improves the recovery ratio of the oil well.
As shown in fig. 1, for example, the profile control well group includes one target well 1 and four target wells, which are communicated with each other through an oil reservoir, and the four target wells are constructed in the water shutoff, extraction, reservoir reforming, and sand control directions, respectively, i.e., the four target wells are a water shutoff stratified production well 2, an extraction well 3, a reservoir reforming well 4, and a sand control well 5, respectively, and the target well is subjected to the profile control operation and the four target wells are subjected to the water shutoff operation, the oil production operation, the reservoir reforming operation, and the sand control operation, respectively.
Further, in step S1, a sandstone reservoir located in the middle of a well oil reservoir with a well developed oil layer and having a good correspondence with the oil layer of the surrounding oil well or having a tracer interpretation result as a well with an effect in the main water drive direction, no casing deformation in the well, falling objects in the well, serious sand production and other complex conditions are selected, and the water injection rate is 5m3And the water well with the water injection pressure not more than 15MPa is taken as the target water well.
Further, in step S1, according to the corresponding relationship of the sandstone group small layers of the sandstone reservoir oil layer group, selecting the oil well corresponding to each layer system of the target water well as the target oil well.
As shown in fig. 6, in one embodiment, in step S2, the performing a profile control operation on the target water well includes:
step S211: selecting a profile control pipe column according to the purpose and the requirement of profile control construction, and determining a profile control process;
step S212: a profile control pipe column is arranged in a target well;
step S213: and carrying out profile control operation on the target water well according to a predetermined profile control process.
In one particular embodiment, a method of selecting a profile control string comprises:
selecting a profile control pipe column according to the distribution condition of a high-permeability oil layer in the oil reservoir, and selecting a general profile control pipe column when the distribution of the high-permeability oil layer in the oil reservoir is single, for example, the high-permeability oil layer is intensively distributed in an oil layer series; when a high-permeability oil layer in an oil reservoir is distributed in an upper layer system and a lower layer system with different water absorption capacities, selecting an oil jacket separate injection profile control pipe column; when a high-permeability oil layer in an oil reservoir is distributed in a plurality of layer systems with different water absorption capacities, a multi-stage separate injection profile control pipe column is selected.
As shown in fig. 2, further, the general profile control string includes an oil pipe 12 and a packer 13 disposed on the oil pipe 12, after the general profile control string is run into the well, the packer 13 is located above the oil layer 100, and the bottom of the oil pipe 12 has a bell mouth, which is an outlet of the profile control agent.
The general profile control tubular column is suitable for target wells with few main oil layers and relatively single high-permeability oil layer distribution. For example, a phi 73mm flat oil pipe is adopted in a general water injection pipe column, and a packer avoids the position of a casing coupling, so that the main purpose is to reduce the influence of large pressure fluctuation on the pipe column and a well head during profile control and improve the construction safety; the setting depth of the cage type profile control tubular column is generally not more than 1800m, because the burial depth of a main oil reservoir is 1625 m-2350 m, the burial depth of a high-permeability oil reservoir is generally 1800 m-2000 m, and the setting depth of the cage type profile control tubular column is not more than 1800m, which is beneficial to the efficient plugging of a high-permeability layer by a profile control agent.
As shown in fig. 3, further, the oil jacket separate injection profile control string includes an oil pipe 12, two water distributors 14 disposed on the oil pipe 12, and a packer 13 disposed on the oil pipe 12 and located between the two water distributors 14, the two water distributors 14 respectively correspond to two oil layers 100, a water nozzle is disposed on each water distributor 14, the packer 13 is located between the two oil layers 100, a part of profile control agent injected from the oil pipe 12 is injected into a lower oil layer system through the lower water distributor 14, and the other part of profile control agent is injected into an oil jacket annulus through the upper water distributor 14, and then is injected into an upper oil layer system from the oil jacket annulus.
The oil jacket separate injection profile control tubular column is suitable for target wells with large difference of water absorption capacities of upper and lower layers of water injection layer sections, high permeable layers and water absorption profile adjustment and improvement. The oil jacket is divided and is annotated profile control tubular column and generally adopt phi 73mm flat oil pipe and Y521 long packing element packer, long packing element packer adopts high temperature resistant, long packing element material, the packer is located about 2000m has the position of thicker oil reservoir intermediate layer, can play better permanent temperature resistant, withstand voltage, seal the effect of upper and lower bed series, wherein upper and lower bed series is according to the oil reservoir geology, to the upper and lower two bed series of oil reservoir overall division, divide the position about 2000m, the general depth of penetration of oil jacket packer is about 2000m down.
Further, an anchor is provided on the tubing 12 above the two water distributors 14.
As shown in fig. 4, further, the multi-stage separate injection profile control string includes an oil pipe 12, a plurality of water distributors 14 disposed on the oil pipe 12, and a plurality of packers 13 disposed on the oil pipe 12, the plurality of packers 13 and the plurality of water distributors 14 are alternately disposed from top to bottom, the plurality of water distributors 14 respectively correspond to a plurality of oil layers 100, each water distributor 14 is provided with a water nozzle, and the profile control agent injected from the oil pipe 12 is respectively injected into each oil layer 100 through the plurality of water distributors 14.
The multi-stage separate injection profile control tubular column is suitable for a target well which has the defects of large permeability difference of a water injection layer section, a plurality of high permeable layers, complex correspondence with an oil well and need of fine adjustment of a water absorption profile. The oil pipe of the multi-stage separate injection profile control pipe column generally adopts a phi 73mm flat oil pipe, and the water nozzle adopts a salvageable flow grading water nozzle. Considering that the permeability is extremely poor, the water absorption capacity of a water injection layer section and the injection pressure level difference are large, and the depth spanning is too large, so that the packer is easy to be set or unsealed, and the depth spanning of each stage of the multi-stage separate injection well section is generally not more than 100 m.
Furthermore, the profile control agent used for performing the profile control operation on the target water well is a weak gel system, such as a complex ion polyacrylamide and phenolic resin cross-linking agent, and the system formula concentration is selected according to the average permeability of the oil layer, and the molecular weight, the hydrolysis degree and the like of the complex ion polyacrylamide are considered. When the average permeability of the oil layer is 400-1000 md, the compound ion polyacrylamide with the concentration of 0.2-0.5% (the molecular weight of the compound ion polypropylene is 2000 ten thousand, the degree of hydrolysis) and the phenolic resin cross-linking agent with the concentration of 0.6-0.8% are compounded, and the stable gelling viscosity is 4000-11000 mpa.s.
Further, the profile control equipment used for performing profile control operation on the target water well comprises: a liquid preparation and stirring integrated tank, an injection increasing pump, a flow pipeline and the like. The profile control equipment is the prior art, and specific structures of the profile control equipment are not described again.
In a first embodiment, the profile control process used for performing profile control operation on a target water well is a step-by-step alternative profile control process, which is used for profile control of a plurality of oil layers with different permeabilities of an oil reservoir to be profile controlled, that is, mainly solving interlayer contradictions, for example, the oil layers are a high-permeability oil layer, a medium-permeability oil layer and a low-permeability oil layer, respectively, the permeability of the high-permeability oil layer is 800 md-1000 md, the permeability of the medium-permeability oil layer is 400 md-800 md, and the permeability of the low-permeability oil layer is less than 400md, and the step-by-step alternative profile control process includes:
step S21311: determining the injection amount and the injection concentration of a profile control agent required by each of the oil layers, wherein the permeability of the oil layer is in direct proportion to the injection concentration of the profile control agent, namely the higher the permeability of the oil layer is, the higher the concentration of the required profile control agent is;
step S21312: respectively preparing profile control agents for the oil layers according to the injection amount and the injection concentration of the profile control agents which are determined in advance;
step S21313: and respectively injecting profile control agents with corresponding concentrations into the oil layers by adopting a mode of injecting the profile control agents and alternately injecting water until the injection amount of the profile control agents reaches the predetermined injection amount.
The sectional alternate profile control process in the embodiment mainly solves the interlayer contradiction aiming at the well group of the long well section co-injection and co-production, achieves the purposes of blocking a high-permeability oil layer and starting a middle-permeability oil layer and a low-permeability oil layer, improves the water absorption profile of the water well, can realize the profile control of the drug injection agent of the target construction layer section and the water injection of the non-construction layer section, avoids the interlayer interference and ensures the water injection time rate of the non-construction layer section.
The sectional alternate profile control process of the embodiment can adopt an oil jacket separate injection profile control pipe column and a multi-stage separate injection profile control pipe column.
Further, the method for determining the injection amount of the profile control agent required by each of the oil layers comprises the following steps:
step a: acquiring the distribution ratios of a plurality of oil layers in an oil reservoir to be profile-controlled;
step b: determining the total injection amount of a profile control agent required by an oil reservoir to be profile controlled, and calling the total injection amount as a first preset total injection amount; the specific determination method of the total injection amount of the profile control agent is the prior art, and is not described in detail;
step c: and determining the injection amount of the profile control agent required by each of the oil layers according to the distribution ratio of the oil layers in the oil reservoir to be profile controlled, wherein the proportion of the injection amount of each oil layer in the first preset total injection amount is in direct proportion to the distribution ratio of the oil layer in the oil reservoir to be profile controlled.
In a second embodiment, the profile control process used for profile control of a target water well is an intermittent slug profile control process, which is used for profile control of an oil layer to be profile-controlled having a plurality of zones with different permeabilities, i.e. mainly solving intra-layer contradictions, such as a high permeability zone, a medium permeability zone and a low permeability zone, respectively, and comprises:
step S21321: determining a plurality of injection concentrations of a profile control agent required by an oil layer to be profile controlled and injection amount corresponding to each injection concentration;
step S21322: preparing a profile control agent according to the predetermined injection concentration and injection quantity;
step S21323: according to the profile control agent concentration of injection from high to low order, divide the turn to treat the profile control oil reservoir and carry out the profile control, the mode that the intermittent type formula was injected into is adopted in the profile control of every turn, and the step of profile control of every turn promptly includes: profile control agent is injected first, then well shut-in and coagulation waiting are carried out, and then water is injected. Wherein the profile control agent injected in each run may be referred to as a slug.
The intermittent slug profile control process in the embodiment mainly solves the contradiction in a large thick layer, realizes intermittent injection, prolongs the interval time of each slug, reduces the breakthrough of water injection in high and medium permeability areas in an oil layer to be profile controlled, changes the direction of water drive in the layer, forces the water injection to be turned to a medium and low permeability area, pushes a medicament to move to the deep part by means of water drive, and improves the utilization degree of residual oil.
The intermittent slug profile control process in the embodiment can adopt a general profile control tubular column and an oil jacket separate injection profile control tubular column.
Further, the method for determining the multiple injection concentrations of the profile control agent required by the oil layer to be profile controlled and the injection amount corresponding to each injection concentration comprises the following steps:
step a: acquiring technical parameters of an oil layer to be subjected to profile control, wherein the technical parameters comprise permeability, water injection pressure, plunging speed and water bursting direction coefficient, and calculating the total injection amount (called as second preset total injection amount) and various injection concentrations of a profile control agent required by the oil layer to be subjected to profile control according to the technical parameters, wherein the specific calculation method is the prior art, and therefore the detailed description is omitted;
step b: the second preset total injection amount is divided into a plurality of slugs, and the slugs correspond to a plurality of injection concentrations respectively, namely the slugs are injection amounts corresponding to the injection concentrations respectively.
In the third embodiment, the profile control process used for profile control operation of a target water well is a multi-section plug composite profile control process, the multi-section plug composite profile control process mainly solves the comprehensive contradiction of contradiction interweaving among layers, layers and planes of an oil layer, and a single contradiction is not outstanding. In this embodiment, the sectional alternate profile control process and then the batch-type slug profile control process may be performed first, or the batch-type slug profile control process and then the sectional alternate profile control process may be performed first.
By adopting the multi-section plug composite profile control process of the embodiment, the profile control agent is injected at low discharge capacity and low pressure, for example, the discharge capacity is 1 square/hour to 1.5 square/hour, and the injection pressure is 8MPa, so that the plugging agent selectively enters the stratum, and the high and medium permeable layers are plugged layer by layer.
The multi-section plug composite profile control process in the embodiment mainly solves the comprehensive contradiction of interlayer, in-layer and plane contradiction interweaving, improves the water driving degree and improves the water absorption profile of an oil layer.
The multi-section plug composite profile control process in the embodiment can adopt a general profile control tubular column and an oil jacket separate injection profile control tubular column.
As shown in fig. 7, in one embodiment, in step S2, the performing the well-linked operation on the target well simultaneously includes:
step S221: obtaining various production indexes of each target oil well, wherein the production indexes are obtained from each target oil well in early-stage exploitation, and the production indexes comprise a water outlet layer position, a sand production amount, a liquid production amount and a water content;
step S222: determining the construction direction of each target oil well according to various production indexes of each target oil well, wherein the construction direction is water plugging, extracting solution, reservoir transformation or sand prevention;
step S223: and performing profile control operation on the target well, and simultaneously performing water plugging operation, oil extraction operation, reservoir transformation operation or sand prevention operation on each target well according to a predetermined construction direction.
And further, performing water plugging operation on a target oil well corresponding to the water burst layer or the water string layer, wherein the water plugging operation comprises mechanical water plugging operation, intelligent water finding and plugging operation and profile control water plugging operation.
Specifically, a mechanical water plugging tool is put into a target oil well with a clear water outlet layer position to perform mechanical water plugging operation, and the mechanical water plugging process mainly comprises four types of top-sealed mining and bottom-sealed mining, top-sealed mining and two-end sealed mining; for a target oil well with an undefined water outlet layer position, an intelligent water plugging tool is put in, and intelligent water finding and plugging operation is carried out; and injecting a water shutoff agent into a target oil well with more water outlet layers and strong heterogeneity of a liquid production profile, and performing profile control and water shutoff operation. The structures and corresponding construction processes of the mechanical water plugging tool and the intelligent water plugging tool are the prior art, and the construction process of profile control and water plugging is the prior art, so that the detailed description is omitted.
Further, an oil recovery operation is performed on a target oil well having a water content lower than a preset normal water content and a liquid supply amount not lower than a preset normal liquid supply amount, for example, the oil recovery operation is a large pumping liquid. For example, the preset normal water content is 90%, and the preset normal liquid supply amount is 30 t/d.
Specifically, corresponding to an oil well with water content reduced by about 5%, better liquid supply, liquid level rising or stability and usually with sinking degree not less than 200 m, the original well pipe column is lifted, and the large pump extract pipe column is put into the oil well by comprehensively considering the factors of liquid supply capacity, sinking degree, oil pumping unit, pipe column load and the like, so that the oil well productivity is improved. The structure and corresponding construction process of the large pump liquid extracting pipe column are prior art, and are not described in detail.
And further, carrying out reservoir transformation operation on the target oil well with the liquid supply amount lower than the preset normal liquid supply amount, wherein the reservoir transformation operation comprises acidification, fracturing and perforation.
The method comprises the following steps of taking out an original well pipe column, putting in an acidizing or fracturing pipe column, carrying out reservoir stratum transformation measures such as acidizing or fracturing and the like, and putting in a production pipe column for production after the oil well with the pollution of a near-well-bottom zone, the seepage capability is reduced and the liquid supply is insufficient. And for the target oil well of which the corresponding oil layer position of the water well is not opened or the target oil well which has no obvious effect after being opened, pulling out the original well pipe column, putting into the perforating pipe column, pulling out the pipe column after perforating, and putting into the production pipe column for production. The structures and corresponding construction processes of the acidizing tubular column, the fracturing tubular column and the perforating tubular column are all the prior art, and therefore the detailed description is omitted.
And further, carrying out sand control operation on the target oil well with the sand output larger than the preset normal sand output. For example, the preset normal sand output is 30 d/m.
Specifically, according to the sand production condition, a sand control tool is put into for sand control, or a sand control production pipe column is put into production, and the adopted sand control tool is one or a plurality of combinations of the existing fracturing sand control pipe column, a sand control screen pipe, a rotary sand control pump and a cyclone sand remover. The structure of the sand control tool and the corresponding construction process are prior art, and are not described in detail.
As shown in FIG. 1, for example, the profile control well group comprises a target well 1 and four target wells, the target well 1 and the four target wells are communicated through an oil layer 100, the construction directions of the four target wells are determined as water shutoff, extraction liquid, reservoir reconstruction and sand control according to various production indexes of the target wells, for convenience of description, the four target wells are respectively called as a water shutoff layered production well 2, an extraction liquid well 3, a reservoir reconstruction well 4 and a sand control well 5 according to the construction directions, equipment in the water shutoff layered production well 2 comprises an oil pump 6 and a water reservoir shutoff packer 7, equipment in the extraction liquid well 3 comprises a deep extraction liquid large pump 8, equipment in the reconstruction reservoir well 4 is an acidizing string, a perforating string or a fracturing string 9, equipment in the sand control well 5 comprises a rotary sand control pump 10 and a sand control screen 11, equipment in the target well 1 is a cage-based profile control string, The oil jacket is divided into the profile control tubular column or the multi-stage is divided into the profile control tubular column separately, wherein the structure and the theory of operation of the oil-well pump 6, the oil reservoir water shutoff packer 7, the deep extraction liquid large pump 8, the acidizing tubular column, the perforation tubular column, the fracturing tubular column 9, the rotary sand-proof pump 10, the sand-proof sieve tube 11 are prior art, so it is not repeated.
The construction steps and the application effect of the oil-water well linkage profile control method are described through an implementation case.
Selecting one target well and five target oil wells from a well block to form a profile control well group, respectively determining the construction directions of the five target oil wells as intelligent water finding and blocking, large pump extract, reservoir transformation, water blocking stratification and combined sand prevention according to the production indexes of the five target oil wells, and specifically comprising the following construction steps:
(1) preparation for construction
Installation of profile control equipment: connecting the liquid preparation and stirring integrated tank with a pipeline of an injection increasing pump, connecting the injection increasing pump with a well head, and simultaneously installing matched tools such as a pressure gauge, a water discharge control valve and the like;
secondly, opening a water drain valve of the liquid preparation tank, simultaneously sucking the composite ion polyacrylamide and the phenolic resin cross-linking agent (the system proportioning requirement needs to be executed according to the scheme design) into the tank by using a Venturi tube mixer, uniformly stirring and mixing, and stirring and curing at a low speed for 2 hours;
and thirdly, starting related downhole operation corresponding to the oil well, pulling out a production pipe column of the original well, and replacing the production pipe column with the production pipe column designed by the scheme, wherein the production pipe column comprises downhole tools such as a sucker rod, an oil well pump, an oil pipe, a hot wire and a packer.
(2) Linkage profile control construction for oil-water well
Firstly, slowly opening a well production valve, starting an injection increasing pump, and pumping cured profile control agents into the well, wherein the injection profile control agents into the well are about 3000; simultaneously, according to the predetermined construction direction, the intelligent water finding and blocking operation, the large pump extract operation, the reservoir transformation operation, the water blocking layering operation and the combined sand prevention operation are respectively carried out on the five target oil wells;
testing the water content change of the general oil well once every 2-3 days after the target oil well is normally started and put into production, and testing the water content change of the key oil well every day;
thirdly, counting the pressure change of the target well every day, and timely making tracking adjustment of the profile control scheme; and (4) counting the yield change of the target oil well every day, wherein the main parameters comprise liquid production, water content, oil production, working fluid level, oil well production conditions and the like so as to make effective statistical analysis. According to statistics, the average daily oil increase of the profile control well group reaches 6 tons.
The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the invention should be considered within the scope of the invention. It should be noted that the components of the present invention are not limited to the above-mentioned whole application, and various technical features described in the present specification can be selected to be used alone or in combination according to actual needs, so that the present invention naturally covers other combinations and specific applications related to the invention.
Claims (10)
1. The linkage profile control method for the oil-water well is characterized by comprising the following steps:
selecting a target well and a target oil well communicated with the target well as a profile control well group;
and performing profile control operation on the target well, and simultaneously performing oil well linkage operation on the target well, wherein the oil well linkage operation comprises one or more of water plugging operation, oil extraction operation, reservoir transformation operation and sand prevention operation.
2. The method of claim 1, wherein the performing the profile control operation on the target well comprises:
selecting a profile control pipe column and determining a profile control process;
lowering the profile control pipe column into the target well;
and carrying out profile control operation on the target water well according to a predetermined profile control process.
3. The linkage profile control method for oil-water wells according to claim 2, wherein the selecting the profile control pipe column comprises:
selecting a profile control pipe column according to the distribution condition of a high-permeability oil layer in the oil reservoir to be profiled, and selecting a general profile control pipe column when the distribution of the high-permeability oil layer in the oil reservoir to be profiled is single; when a high-permeability oil layer in an oil reservoir to be profile-controlled is distributed in an upper layer system and a lower layer system with different water absorption capacities, selecting an oil sleeve to be separately injected into a profile control pipe column; and when the high-permeability oil layer in the oil reservoir to be profile-controlled is distributed in a plurality of layer systems with different water absorption capacities, selecting a multi-stage separate injection profile control pipe column.
4. The linkage profile control method for oil-water wells according to claim 2, wherein the profile control string is an oil jacket separate injection profile control string, the oil jacket separate injection profile control string comprises an oil pipe, two water distributors arranged on the oil pipe, and a packer arranged on the oil pipe and located between the two water distributors, and the two water distributors correspond to two oil layers respectively.
5. The linkage profile control method for oil-water wells according to claim 2, wherein the profile control string is a multi-stage separate injection profile control string, the multi-stage separate injection profile control string comprises an oil pipe, a plurality of water distributors arranged on the oil pipe, and a plurality of packers arranged on the oil pipe, the plurality of packers and the plurality of water distributors are alternately arranged from top to bottom, and the plurality of water distributors correspond to a plurality of oil layers respectively.
6. The linkage profile control method for the oil-water well according to claim 2, wherein the profile control process is a sectional alternate profile control process, the sectional alternate profile control process is used for profile control of a plurality of oil layers with different permeabilities of an oil reservoir to be profile controlled, and the sectional alternate profile control process comprises the following steps:
determining the injection quantity and the injection concentration of the profile control agent required by each of the oil layers;
respectively preparing profile control agents for the oil layers according to the injection amount and the injection concentration of the profile control agents which are determined in advance;
and respectively injecting profile control agents with corresponding concentrations into the oil layers by adopting a mode of injecting the profile control agents and alternately injecting water until the injection amount of the profile control agents reaches the predetermined injection amount.
7. The linkage profile control method for the oil-water well according to claim 2, wherein the profile control process is an intermittent slug profile control process, the intermittent slug profile control process is used for profile control of an oil layer to be profile-controlled with a plurality of regions with different permeabilities, and the intermittent slug profile control process comprises the following steps:
determining a plurality of injection concentrations of a profile control agent required by an oil layer to be profile controlled and injection amount corresponding to each injection concentration;
preparing a profile control agent according to the predetermined injection concentration and injection quantity;
according to the sequence of profile control agent injection concentration from high to low, the profile control is carried out on the oil layer to be subjected to profile control in multiple turns, and the step of profile control in each turn comprises the following steps: profile control agent is injected first, then well shut-in and coagulation waiting are carried out, and then water is injected.
8. The linkage profile control method for oil-water wells according to claim 2, wherein the profile control process is a multi-section plug composite profile control process, and the multi-section plug composite profile control process comprises a section alternate profile control process and an intermittent section plug profile control process;
the sectional alternative profile control process comprises the following steps:
determining the injection amount and the injection concentration of the profile control agent required by each of the oil layers;
respectively preparing profile control agents for the oil layers according to the injection amount and the injection concentration of the profile control agents which are determined in advance;
respectively injecting profile control agents with corresponding concentrations into the oil layers by adopting a mode of injecting profile control agents and alternately injecting water until the injection amount of the profile control agents reaches the predetermined injection amount;
the intermittent slug profile control process comprises the following steps:
determining the injection concentrations of various profile control agents required by an oil layer to be profile controlled and the injection amount corresponding to each injection concentration;
preparing a profile control agent according to the predetermined injection concentration and injection quantity;
according to the sequence of profile control agent injection concentration from high to low, the profile control is carried out on the oil layer to be subjected to profile control in multiple turns, and the step of profile control in each turn comprises the following steps: profile control agent is injected first, then well shut-in and coagulation waiting are carried out, and then water is injected.
9. An oil-water well linkage profile control method according to any one of claims 1 to 8, wherein the simultaneous well-linkage operation on the target well comprises:
obtaining various production indexes of each target oil well, wherein the production indexes are obtained from each target oil well in early-stage exploitation, and the production indexes comprise a water outlet horizon, a sand production amount, a liquid production amount and a water content;
determining the construction direction of each target oil well according to various production indexes of each target oil well, wherein the construction direction is water plugging, extract, reservoir transformation or sand prevention;
and performing profile control operation on the target well, and simultaneously performing water plugging operation, oil extraction operation, reservoir transformation operation or sand prevention operation on each target well according to the predetermined construction direction.
10. The linkage profile control method for the oil-water well as claimed in claim 9, wherein the water shutoff operation comprises mechanical water shutoff operation, intelligent water finding and shutoff operation and profile control and shutoff operation, and the reservoir transformation operation comprises acidification, fracturing and perforation.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102146788A (en) * | 2011-03-30 | 2011-08-10 | 中国石油化工股份有限公司 | Method for enhancing recovery ratio through three-dimensional streamline regulation of water drive reservoir |
| US20120292026A1 (en) * | 2010-01-22 | 2012-11-22 | Anthony David Brooks | Systems and methods for producing oil and/or gas |
| CN103013480A (en) * | 2012-12-27 | 2013-04-03 | 大庆中油泰克石油技术服务有限公司 | Modified petroleum coke granule composite profile control water blocking agent and multi-round bidirectional blocking control technology |
| CN105625981A (en) * | 2015-07-29 | 2016-06-01 | 中国石油化工股份有限公司 | Composite profile control method for middle-high permeability oil reservoirs |
| CN105971550A (en) * | 2016-06-27 | 2016-09-28 | 烟台智本知识产权运营管理有限公司 | Profile control method for medium-and-high-permeability reservoir |
| CN110617041A (en) * | 2019-10-09 | 2019-12-27 | 中国石油天然气股份有限公司 | Water injection well water absorption profile adjusting sleeve and adjusting method |
-
2020
- 2020-08-27 CN CN202010876807.7A patent/CN114109327B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120292026A1 (en) * | 2010-01-22 | 2012-11-22 | Anthony David Brooks | Systems and methods for producing oil and/or gas |
| CN102146788A (en) * | 2011-03-30 | 2011-08-10 | 中国石油化工股份有限公司 | Method for enhancing recovery ratio through three-dimensional streamline regulation of water drive reservoir |
| CN103013480A (en) * | 2012-12-27 | 2013-04-03 | 大庆中油泰克石油技术服务有限公司 | Modified petroleum coke granule composite profile control water blocking agent and multi-round bidirectional blocking control technology |
| CN105625981A (en) * | 2015-07-29 | 2016-06-01 | 中国石油化工股份有限公司 | Composite profile control method for middle-high permeability oil reservoirs |
| CN105971550A (en) * | 2016-06-27 | 2016-09-28 | 烟台智本知识产权运营管理有限公司 | Profile control method for medium-and-high-permeability reservoir |
| CN110617041A (en) * | 2019-10-09 | 2019-12-27 | 中国石油天然气股份有限公司 | Water injection well water absorption profile adjusting sleeve and adjusting method |
Non-Patent Citations (1)
| Title |
|---|
| 王玉功等: "姬塬油田油水井双向调堵技术研究与应用", 石油化工应用, vol. 39, no. 2, pages 32 - 36 * |
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