CN110130881B - Method for rapidly identifying water plugging position of oil field horizontal well - Google Patents
Method for rapidly identifying water plugging position of oil field horizontal well Download PDFInfo
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- 239000004576 sand Substances 0.000 description 2
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- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
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Abstract
The invention discloses a method for quickly identifying a water plugging position of an oil field horizontal well, which comprises the following steps of firstly, determining a water breakthrough type according to salt-containing data of a water breakthrough well; secondly, collecting physical properties and production dynamic data of an oil well reservoir, and determining the lower limit of oil outlet of a well in the stratum and the development condition of a seam network of an injection well; then, the water well in the stratum analyzes the plane oil-containing condition by utilizing the lower limit standard of oil outlet, qualitatively judges the water outlet end by combining the actual production condition of the surrounding oil well, and determines the water outlet end by the dynamic response relation of the water well; finally, comprehensively utilizing the judged water outlet end, and determining the water outlet conditions of different layer sections to determine the water outlet section by combining the chromatographic value of each spray point of a single well; and the water plugging position is determined by combining the pressure and the reconstruction position. The method starts with the existing dynamic and static data of the horizontal well, quickly identifies the water layer section, and further adopts the measures of water control and oil stabilization; meanwhile, the method is suitable for two water-meeting types of the water-meeting injected water and the water-meeting stratum water.
Description
Technical Field
The invention belongs to the field of oil well water plugging, and relates to a method for quickly judging and identifying a water plugging position of an oil field horizontal well.
Background
The well body structure of horizontal well is different with the vertical well, makes it change the phenomenon that a large amount of water produced in the oil recovery in-process, and the horizontal well once go out water and will bring the consumption stratum energy, reduces oil production volume, reduces the oil well pump efficiency, aggravates the corruption and the scale deposit of pipeline, equipment, increases a series of problems such as load of profit processing system. The key of the horizontal well water plugging is to quickly find a water outlet position.
At present, the water inflow direction of a high-water-cut horizontal well of an oil field is mainly determined by means of dynamic verification, dynamic monitoring and fluid production profile testing of a water injection well. The dynamic verification of the water injection well is to track the water content of the oil well by changing the working system of the water injection well and judge the water incoming direction, but the horizontal well is only suitable for a fractured water-breakthrough horizontal well because of more corresponding water injection wells and longer verification period. The dynamic monitoring method mainly utilizes water drive front edge test and tracer agent monitoring to judge the incoming water direction, but is influenced by the development and heterogeneity of reservoir microcracks, so that the seam gateway system is complex, the incoming water direction is difficult to judge, the period is long, and the cost is high. The production profile test is that an external force (a cable or a continuous oil pipe, a crawler and the like) is utilized to convey a production profile test instrument to a perforation section through an oil sleeve annulus, and a turbine flowmeter and a water retention rate meter are adopted to monitor flow and water content in real time under the condition that the pumping unit does not stop pumping, but the process is complex and the test cost is high.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method for quickly judging the water plugging position of an oil field horizontal well.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
a method for quickly identifying a water plugging position of an oil field horizontal well comprises the following steps:
step 1: determining the water breakthrough type according to the water type of the oil field horizontal well after water breakthrough;
step 2: when the water breakthrough type is formation water breakthrough, determining the lower oil outlet limit of the horizontal well of the oil field; when the water breakthrough type is the water breakthrough type, determining the seam network development condition of the horizontal well of the oil field;
and step 3: when the water breakthrough type is stratum water breakthrough, determining the water outlet end of the horizontal well of the oil field according to the lower oil outlet limit of the horizontal well of the oil field and the actual production condition of the surrounding oil well; when the water breakthrough type is injected water, determining the water outlet end of the horizontal well of the oil field according to the seam network development condition and the dynamic response relation of the horizontal well of the oil field;
and 4, step 4: determining a water outlet section of the horizontal well of the oil field according to the chromatographic parameter value of each spraying point at the water outlet end;
and 5: and determining the water plugging position of the horizontal well of the oil field according to the water outlet section of the horizontal well of the oil field.
The invention further improves the following steps:
the specific method of the step 1 comprises the following steps:
according to the water type of the oil field horizontal well after water breakthrough, the water breakthrough is determinedThe type of water; when the oil field horizontal well is in water breakthrough, the water type is CaCl2When the water is in the stratum, the water is in the water type; the water type of the oil field horizontal well after water breakthrough is Na2SO4When the water is present, the water-breakthrough type is the water-breakthrough type.
The specific method for determining the oil outlet lower limit of the horizontal well in the oil field in the step 2 comprises the following steps:
according to the reservoir physical properties and production dynamic data of the oil field horizontal well, drawing a relation graph of the resistance, the acoustic time difference and the permeability of the oil field horizontal well and the thickness and the water content of an oil layer, and a relation graph of the resistance, the acoustic time difference and the permeability of the oil field horizontal well and the thickness and the productivity of the oil layer, and determining the oil production lower limit of the oil field horizontal well.
The specific method for determining the seam network development condition of the oilfield horizontal well in the step 2 comprises the following steps:
obtaining the corresponding relation between the fracturing crack length of the horizontal well of the oil field and the amount of the stored liquid through underground micro-earthquake, and obtaining the fracturing crack length through the measured amount of the stored liquid; drawing a seam network distribution map according to the reconstructed seam length, and judging the water injection well communication condition of the oil field horizontal well according to the seam network distribution map; and determining the seam network development condition of the horizontal well of the oil field according to the length of the pressed seam and the communication condition of the water injection well.
And 3, the dynamic response relation in the step 3 is the relation between the water content of the horizontal well of the oil field and the advanced water injection quantity, the water injection strength and the accumulated water injection.
The specific method of the step 4 comprises the following steps:
determining a water outlet section of the horizontal well of the oil field according to a spraying point chromatographic parameter value of the water outlet end of the horizontal well of the oil field; when the water breakthrough type is formation water breakthrough, the region of the horizontal well of the oil field, of which the spray point chromatographic parameter value is lower than the standard value, is the water discharge section of the horizontal well of the oil field; and when the water breakthrough type is water injection, the region of the horizontal well in the oil field, of which the chromatographic parameter value of the spray point is higher than the standard value, is the water outlet section of the horizontal well in the oil field.
The specific method of the step 5 comprises the following steps:
according to the water outlet section of the oil field horizontal well, when the water-meeting type is the water-meeting stratum, 50m is reserved between the water blocking position and the water outlet section, and the water blocking position of the oil field horizontal well is determined; and when the water breakthrough type is the water injection type, reserving 100m between the water blocking position and the water outlet section, and determining the water blocking position of the horizontal well of the oil field.
Compared with the prior art, the invention has the following beneficial effects:
starting with the existing dynamic and static data of the horizontal well of the oil field, determining the lower limit of oil outlet of the well in the stratum and the development condition of the gap net of the well injected into the stratum; determining a water outlet end, combining the chromatographic parameter value of each spraying point in the determined water outlet end, quickly identifying a water outlet section, determining a water plugging position, and further adopting a water control and oil stabilization measure; meanwhile, the method is suitable for two water-meeting types of the water-meeting injected water and the water-meeting stratum water, and has strong applicability. The method has both theoretical basis and actual measurement data support, can accurately judge and identify the water outlet position of the horizontal well, and provides basis for formulating treatment measures of the high-water-cut horizontal well.
Drawings
FIG. 1 is a flow chart of a method of the present invention;
FIG. 2 is a CP-X oil saturation contour map of an aquifer water horizontal well of the invention;
FIG. 3 is a cumulative water injection profile for a horizontal well CP-Y with water injection according to the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, the invention relates to a method for rapidly identifying the water plugging position of an oil field horizontal well, which comprises the steps of firstly determining the water breakthrough type according to the salt-containing data of the water breakthrough well, collecting the physical property and production dynamic data of an oil well reservoir, and determining the oil outlet lower limit of the water breakthrough well and the development condition of a water injection well gap network; analyzing the plane oil-containing condition of the formation well by using the lower limit standard of oil outlet, and qualitatively judging the water outlet end by combining the actual production condition of the surrounding oil wells; and determining the water outlet end of the injection well through the dynamic response relation. Then comprehensively utilizing the judged water outlet end, and determining the water outlet conditions of different intervals by combining the height of the chromatographic parameter value of each spraying point of a single well; and finally, determining the plugging position of the packer by combining the pressure and the transformation position.
The specific technical scheme is as follows:
step 1: determining the water breakthrough type according to the salt-containing data after water breakthrough of the oil field horizontal well; when the oil field horizontal well is in water breakthrough, the water type is CaCl2When the water is in the stratum, the water is in the water type; the water type of the oil field horizontal well after water breakthrough is Na2SO4When the water is present, the water-breakthrough type is the water-breakthrough type.
Step 2: when the water breakthrough type is stratum water breakthrough, drawing a relational graph of the resistance, the acoustic time difference, the permeability and the oil layer thickness of the oil field horizontal well and the water content, and a relational graph of the resistance, the acoustic time difference, the permeability and the oil layer thickness of the oil field horizontal well and the productivity according to the reservoir physical properties and production dynamic data of the oil field horizontal well, and determining the lower oil outlet limit of the oil field horizontal well; when the water breakthrough type is injection water, obtaining the corresponding relation between the fracturing crack length of the horizontal well of the oil field and the amount of the land reserve liquid through underground micro-earthquake, and obtaining the fracturing crack length through the measured amount of the land reserve liquid; drawing a seam network distribution map according to the length of the fracturing seam, and judging the communication condition of a water injection well of the horizontal well of the oil field according to the seam network distribution map; determining the seam network development condition of the horizontal well of the oil field according to the modified seam length and the communication condition of the water injection well; wherein the fracturing crack length is positively correlated with the amount of the land liquid.
And 3, step 3: when the water breakthrough type is stratum water breakthrough, whether the oil level situation is lower than the oil output lower limit standard or not is judged according to the oil output lower limit of the oil field horizontal well, and water breakthrough is not judged if the oil level situation is not lower than the oil output lower limit standard; determining the water outlet end of the horizontal well of the oil field by combining the actual production condition of the surrounding oil well; when the water breakthrough type is injected water, whether the water injection strength and the accumulated water injection amount are too large or not is judged according to the relationship between the seam network development condition of the oil field horizontal well and the water content, the advanced water injection amount, the water injection strength and the accumulated water injection of the oil field horizontal well, and if not, no water is discharged; determining the water outlet end of the horizontal well of the oil field;
and 4, step 4: determining a water outlet section of the oil field horizontal well according to a spraying point chromatographic parameter value of the water outlet end of the oil field horizontal well; when the water breakthrough type is formation water breakthrough, the region of the horizontal well of the oil field, of which the spray point chromatographic parameter value is lower than the standard value, is the water discharge section of the horizontal well of the oil field; and when the water breakthrough type is water injection, the region of the horizontal well in the oil field, of which the chromatographic parameter value of the spray point is higher than the standard value, is the water outlet section of the horizontal well in the oil field.
And 5: according to the water outlet section of the oil field horizontal well, when the water-meeting type is the water-meeting stratum, 50m is reserved between the water blocking position and the water outlet section, and the water blocking position of the oil field horizontal well is determined; and when the water breakthrough type is the water injection type, reserving 100m between the water blocking position and the water outlet section, and determining the water blocking position of the horizontal well of the oil field.
Example 1
Information of water-break well: CP-X segmented multi-cluster 10-segment fracturing, sand 335m3Adding 50m of acid3And the daily liquid yield at the initial stage of production is 9.6m34.8t of daily product liquid, 41.7 percent of water, 34486mg/l of salt after water breakthrough and CaCl in water type2。
Step 1: and judging the water-break type.
Because the well is high in salt (typically > 30000mg/l), water type CaCl2, see formation water.
Step 2: and collecting physical property and production dynamic data of the CP-X well reservoir.
And drawing a relation graph of the resistance, the acoustic time difference, the permeability and the oil layer thickness and water content of the horizontal well of the oil field, and a relation graph of the resistance, the acoustic time difference, the permeability and the oil layer thickness and productivity of the horizontal well of the oil field, and determining that the oil outlet down-line resistance of the horizontal well is 30 omega, the sound velocity is more than 220 mu m/m, and the oil layer thickness is more than 10 m.
And step 3: and determining a water outlet end.
And analyzing the oil-containing condition of the plane according to the oil outlet lower limit standard, and determining that the water outlet end of the well is in the southeast direction by combining the actual production condition of the surrounding oil well and referring to the figure 2.
And 4, step 4: and determining a water outlet section.
And judging that the water outlet section 2705m is south according to the chromatographic value, the oil content and the actual production condition of the surrounding oil well.
And 5: determining a water plugging position: and (4) reserving 50m between the water blocking position and the water outlet section by combining the pressure and the reconstruction position, and determining the blocking position of the packer.
Example 2
Information of water-break well: CP-Y staged multi-cluster fracturing 15 stages, sand 491m3Adding 84m of acid3Before production, 3 corresponding wells have cumulative over-injection 7421m3(ii) a Daily liquid of 14.03m at initial stage of production30t daily product liquid, 100 percent water, 9644mg/l salt and Na in water type2SO4。
Step 1: judgment of water-break type
Since the wells contained low salt (typically < 15000mg/l), the water type was sodium sulfate, see water injected.
Step 2: and collecting physical property and production dynamic data of the CP-X well reservoir.
Obtaining the corresponding relation between the fracturing crack length of the horizontal well of the oil field and the amount of the stored liquid through underground micro-earthquake, and obtaining the fracturing crack length through the measured amount of the stored liquid; drawing a seam network distribution map according to the length of the fracturing seam, and judging the communication condition of a water injection well of the horizontal well of the oil field according to the seam network distribution map; determining the seam network development condition of the horizontal well of the oil field according to the modified seam length and the communication condition of the water injection well; wherein the fracturing crack length is positively correlated with the amount of the land liquid. The fracture length is α liquid volume, and α is a positive correlation coefficient.
And step 3: and determining a water outlet end.
According to the relation between the development condition of the seam network of the horizontal well of the oil field and the water content of the horizontal well of the oil field, the advanced water injection amount, the water injection strength and the accumulated water injection, the south water is seen from the water drive distribution, and the view is shown in figure 3.
And 4, step 4: and determining a water outlet section.
The well depth is below 3255m, the chromatographic value is high, the physical property is good, and water is easy to see;
and 5: and determining the water plugging position.
And (3) reserving 100m between the water blocking position and the water outlet section by combining the position of the water outlet section and the pressure and the situation of the transformed position, and determining the blocking position of the packer.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (6)
1. A method for rapidly identifying a water plugging position of an oil field horizontal well is characterized by comprising the following steps:
step 1: determining the water breakthrough type according to the water type of the oil field horizontal well after water breakthrough;
step 2: when the water breakthrough type is formation water breakthrough, determining the lower oil outlet limit of the horizontal well of the oil field; when the water breakthrough type is the water breakthrough type, determining the seam network development condition of the horizontal well of the oil field;
and 3, step 3: when the water breakthrough type is stratum water breakthrough, determining the water outlet end of the horizontal well of the oil field according to the lower oil outlet limit of the horizontal well of the oil field and the actual production condition of the surrounding oil well; when the water breakthrough type is injected water, determining the water outlet end of the horizontal well of the oil field according to the seam network development condition and the dynamic response relation of the horizontal well of the oil field;
and 4, step 4: determining a water outlet section of the horizontal well of the oil field according to the chromatographic parameter value of each spraying point at the water outlet end; the specific method comprises the following steps: determining a water outlet section of the horizontal well of the oil field according to a spraying point chromatographic parameter value of the water outlet end of the horizontal well of the oil field; when the water breakthrough type is formation water breakthrough, the region of the horizontal well of the oil field, of which the spray point chromatographic parameter value is lower than the standard value, is the water discharge section of the horizontal well of the oil field; when the water breakthrough type is water injection, the region of the horizontal well of the oil field, of which the chromatographic parameter value of the spraying point is higher than the standard value, is a water outlet section of the horizontal well of the oil field;
and 5: and determining the water plugging position of the horizontal well of the oil field according to the water outlet section of the horizontal well of the oil field.
2. The method for rapidly judging the water plugging position of the horizontal well in the oil field according to claim 1, wherein the specific method in the step 1 comprises the following steps:
determining the water breakthrough type according to the water type of the oil field horizontal well after water breakthrough; when the oil field horizontal well is in water breakthrough, the water type is CaCl2When the water is in the stratum, the water is in the water type; the water type of the oil field horizontal well after water breakthrough is Na2SO4When the water is present, the water-breakthrough type is the water-breakthrough type.
3. The method for rapidly identifying the water plugging position of the oil field horizontal well according to claim 1, wherein the specific method for determining the lower oil outlet limit of the oil field horizontal well in the step 2 comprises the following steps:
and drawing a relation graph of the resistance, the acoustic time difference, the permeability and the oil layer thickness of the oil field horizontal well and the water content, and a relation graph of the resistance, the acoustic time difference, the permeability and the oil layer thickness and the productivity of the oil field horizontal well according to the reservoir physical property and production dynamic data of the oil field horizontal well, and determining the oil outlet lower limit of the oil field horizontal well.
4. The method for rapidly judging the water plugging position of the horizontal well in the oil field according to claim 1, wherein the specific method for determining the seam network development condition of the horizontal well in the oil field in the step 2 comprises the following steps:
obtaining the corresponding relation between the fracturing crack length of the horizontal well of the oil field and the amount of the stored liquid through underground micro-earthquake, and obtaining the fracturing crack length through the measured amount of the stored liquid; drawing a seam network distribution map according to the reconstructed seam length, and judging the water injection well communication condition of the oil field horizontal well according to the seam network distribution map; and determining the seam network development condition of the horizontal well of the oil field according to the length of the pressed seam and the communication condition of the water injection well.
5. The method for rapidly identifying the water plugging position of the oil field horizontal well according to claim 1, wherein the dynamic response relationship in the step 3 is a relationship between water cut and advanced water injection amount, water injection strength and accumulated water injection of the oil field horizontal well.
6. The method for rapidly judging the water plugging position of the horizontal well in the oil field according to claim 1, wherein the specific method in the step 5 comprises the following steps:
according to the water outlet section of the oil field horizontal well, when the water-meeting type is the water-meeting stratum, 50m is reserved between the water blocking position and the water outlet section, and the water blocking position of the oil field horizontal well is determined; and when the water breakthrough type is the water injection type, reserving 100m between the water blocking position and the water outlet section, and determining the water blocking position of the horizontal well of the oil field.
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US4876449A (en) * | 1988-05-12 | 1989-10-24 | Conoco Inc. | Reservoir evaluation using partitioning tracer |
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