CN110984944A - Fracturing method for improving strip-shaped high-water-saturation reservoir development effect - Google Patents
Fracturing method for improving strip-shaped high-water-saturation reservoir development effect Download PDFInfo
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- 238000005488 sandblasting Methods 0.000 claims abstract description 27
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- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
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- 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
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Abstract
The invention discloses a fracturing method for improving the development effect of a strip-shaped high-water-saturation oil reservoir, which comprises the following steps of: step 1) judging whether a reservoir of a well to be treated is a strip-shaped high-water-saturation oil reservoir or not; step 2) determining an oil-containing strip layer and a high-water saturated strip layer, and designing a perforation position in the oil-containing strip layer; step 3), designing transformation parameters to obtain fracturing discharge capacity and sand amount; and 4) carrying out multi-section fixed-point modification on the oil-containing strip layer by utilizing the modification parameters designed in the step 3) and utilizing hydraulic sand-blasting perforation fracturing. The invention provides a fracturing method for improving the strip-shaped high-water-saturation reservoir development effect, which realizes the fracturing of a reservoir with larger thickness and strip-shaped oil-containing characteristics in the longitudinal direction, can realize deep fracturing transformation on an oil-containing strip layer in a targeted manner, avoids the pressing through of the high-water-saturation strip layer, reduces the production water content while improving the yield of a single well, reduces the serious burden of a gathering system and a sewage treatment system, and improves the development effect.
Description
Technical Field
The invention belongs to the technical field of gas field fracturing development, and particularly relates to a fracturing method for improving the strip-shaped high-water-saturation oil reservoir development effect.
Background
The ultra-low permeability high water-saturation oil reservoir is different from other low permeability (the permeability is more than or equal to 10 mD) high water-saturation oil reservoirs in types, the low permeability high water-saturation oil reservoir can ensure the purposes of increasing the yield per unit and reducing the water content by adopting conventional small-scale fracturing, but the ultra-low permeability high water-saturation oil reservoir is low in production yield due to the fact that the physical property of the reservoir is poor and the average permeability is 0.82mD, the small-scale fracturing is mainly adopted in the early stage, the single well yield is often low, the single well yield is about 1.0-1.5 t/d, in order to increase the single well yield, the idea is changed, concentrated perforation and large-scale combined layer fracturing technology at the middle upper part of the oil layer is adopted, the single well yield is increased, the daily oil yield per unit well reaches 2.5-3.0 t/d, the inevitable water content increase is caused, the average. In recent two years, core observation shows that the ultra-low permeability high water-saturation oil reservoir shows the strip-shaped oil-containing characteristics of one section containing oil and one section containing water, so that the strip-shaped high water-saturation oil reservoir is necessary to improve the yield of a single well, reduce the water content in production and improve the development effect by optimizing and improving the fracturing method.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a fracturing method for improving the development effect of a strip-shaped high-water-saturation oil reservoir, and overcomes the defects that in the prior art, the fracturing method comprises the following steps: the small-scale fracturing is adopted, the production yield is low, the single-well yield is about 1.0-1.5 t/d, and 2: by adopting the technology of centralized perforation of the middle upper part of an oil layer and large-scale combined fracturing, the yield of a single well is improved, the daily oil production of the single well reaches 2.5-3.0 t/d, but the water content is inevitably increased, the average water content in production reaches 70%, and 3: the water content is increased, which brings serious burden to the gathering and transportation system and the sewage treatment system, and the development effect is poor.
In order to solve the technical problem, the technical scheme of the invention is as follows: a fracturing method for improving the development effect of a strip-shaped high-water-saturation oil reservoir comprises the following steps:
step 1) judging whether a reservoir of a well to be treated is a strip-shaped high-water-saturation oil reservoir or not;
step 2) when the reservoir of the well to be processed is a strip-shaped high-water-saturation reservoir, determining an oil-containing strip layer and a high-water-saturation strip layer, and designing a perforation position in the oil-containing strip layer;
step 3), designing transformation parameters to obtain fracturing discharge capacity and sand amount;
and 4) carrying out multi-section fixed-point modification on the oil-containing strip layer by utilizing the modification parameters designed in the step 3) and utilizing hydraulic sand-blasting perforation fracturing.
Preferably, in the step 1), whether the reservoir of the well to be processed is a strip-shaped high water-saturation oil reservoir is judged by integrating the core analysis and the well logging interpretation results, the depths corresponding to the high water-saturation and high oil-saturation characteristics in the core analysis are associated with the interpretation results corresponding to the well logging interpretation, and the reference range value of the oil-water-content correlation well logging parameter is established to distinguish the high water-saturation oil reservoir from the strip-shaped high water-saturation oil reservoir.
Preferably, the reference range value of the logging parameter of the correlation between oil content and water content comprises reservoir resistance and acoustic wave time difference, and the reservoir resistance of one part of the reservoir of the well to be processed is more than 30 omega m, the acoustic wave time difference is less than 230 mu m.s, and the reservoir resistance of the other part of the reservoir is less than 30 omega m, and the acoustic wave time difference is more than 230 mu m.s, the well is a strip-shaped high-water-saturation reservoir; and when the reservoir resistance of the reservoir of the well to be treated is less than 30 omega m and the acoustic wave time difference is more than 230 mu m.s, the reservoir is a high water-saturated reservoir.
Preferably, in the step 2), the oil-containing strip layer and the high-water saturation strip layer are judged according to the reservoir resistance and the acoustic wave time difference, wherein the reservoir resistance is more than 30 Ω m, the acoustic wave time difference is less than 230 μm.s, the oil-containing strip layer is obtained, the reservoir resistance is less than 30 Ω m, the acoustic wave time difference is more than 230 μm.s, the high-water saturation strip layer is obtained, and the perforation position is designed in the oil-containing strip layer.
Preferably, the design and modification parameters in the step 3) are specifically as follows:
step 3-1) establishing a fracturing geological model with parameters of permeability, ground stress and Young modulus according to the characteristics of the strip-shaped oil-bearing reservoir;
step 3-2) correcting the fracturing geological model in the step 3-1) according to the thickness, permeability, ground stress and Young modulus parameters of the oil-containing strip layer and the high water saturation strip layer of the reservoir of the well to be treated;
and 3-3) operating a fractured geological model by using FracPT fracturing software, inputting permeability, crustal stress and Young modulus in the FracPT fracturing software, controlling the height of a crack to be 5-15 m and the length of the crack to be 100-120 m, and finally obtaining the fracturing discharge capacity and the sand amount.
Preferably, in the step 4), differential fracturing modification parameters are established by utilizing the modification parameters designed in the step 3), namely, different distances correspond to different fracturing discharge capacities and sand volumes, and when the distance between the oil-containing strip layer and the high water saturation strip layer is 5-15 m, the fracturing discharge capacity is 1.0-2.2 m3A sand amount of 15-30 m/min3。
Preferably, when the distance between the oil-containing strip layer and the high water saturation strip layer is 5m, the fracturing discharge capacity is 1.0-1.2 m3Min, sand amount 15m3(ii) a When the distance between the oil-containing strip layer and the high water saturation strip layer is 10m, the fracturing discharge capacity is 1.4-1.6 m3A sand amount of 20 to 25 m/min3(ii) a When the distance between the oil-containing strip layer and the high water saturation strip layer is 15m, the fracturing discharge capacity is 1.8-2.2 m3Min, sand amount 30m3。
Preferably, the length of the hydraulic sand blasting perforation fracturing perforation segment in the step 4) is 10cm, and the number of the perforations is 4-6.
Compared with the prior art, the invention has the advantages that:
(1) the invention provides a fracturing method for improving the strip-shaped high-water-saturation reservoir development effect, which realizes the fracturing of a reservoir with larger thickness and longitudinal strip-shaped oil-containing characteristic, can realize deep fracturing transformation on an oil-containing strip layer in a targeted manner, avoids the pressing through of the high-water-saturation strip layer, reduces the production water content while improving the yield of a single well, reduces the serious burden of a gathering system and a sewage treatment system, and improves the development effect;
(2) according to the method, a fracturing transformation idea for treating the high water-saturated oil reservoir and the strip-shaped high water-saturated oil reservoir in a distinguishing manner is provided according to the corresponding analysis of the core analysis and the well logging interpretation result, the strip-shaped high water-saturated oil reservoir is divided into an oil-containing strip layer and a high water-saturated strip layer, only the oil-containing strip layer is subjected to hydraulic sand blasting perforation fracturing, fixed-point transformation and multi-section fracturing are carried out, the seam height is controlled, and the seam length is increased, so that the production efficiency is effectively improved;
(3) the hydraulic sand blasting perforation fracturing can realize fixed-point fracturing and control the fracture height, avoids the fracture from channeling to a high-water-saturation strip interval, can realize the enlargement of the modification scale, increases the transverse penetration depth and improves the single-well yield, and aims at optimizing and adjusting the conventional common small-scale fracturing, centralized perforation, large-scale fracturing and other fracturing modification modes, so that the single-well yield is improved and the production water content is reduced;
(4) the invention establishes a strip high water-saturation reservoir fracturing geological model, and provides that crack simulation is carried out according to the distance and physical property difference (permeability, ground stress and Young modulus parameters) between an oil-containing strip layer and a high water-saturation strip layer, so that differentiated transformation parameters are obtained, the optimal fracturing discharge capacity and sand content of hydraulic sand-blasting perforation fracturing of each oil-containing strip layer are obtained, and the development effect is improved.
Drawings
Fig. 1 is a graph illustrating the fracturing effect of a strip-shaped high water-saturation reservoir in an embodiment of the invention.
Detailed Description
The following describes embodiments of the present invention with reference to examples:
it should be noted that the structures, proportions, sizes, and other embodiments disclosed herein are illustrative only and are not intended to limit the scope of the invention, which is defined by the claims, since the scope of the invention is not limited by the specific structures, proportions, and dimensions, or otherwise, unless otherwise specified, since various modifications, changes in the proportions and variations thereof, can be made by those skilled in the art without departing from the spirit and scope of the invention.
In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
The results of core analysis and well logging interpretation are all the prior art; the fractured geologic model and the FracPT fracturing software of the invention are both prior art.
Example 1
The invention discloses a fracturing method for improving the development effect of a strip-shaped high-water-saturation oil reservoir, which comprises the following steps of:
step 1) judging whether a reservoir of a well to be treated is a strip-shaped high-water-saturation oil reservoir or not;
step 2) when the reservoir of the well to be processed is a strip-shaped high-water-saturation reservoir, determining an oil-containing strip layer and a high-water-saturation strip layer, and designing a perforation position in the oil-containing strip layer;
step 3), designing transformation parameters to obtain fracturing discharge capacity and sand amount;
and 4) carrying out multi-section fixed-point modification on the oil-containing strip layer by utilizing the modification parameters designed in the step 3) and utilizing hydraulic sand-blasting perforation fracturing.
Example 2
The invention discloses a fracturing method for improving the development effect of a strip-shaped high-water-saturation oil reservoir, which comprises the following steps of:
step 1) judging whether a reservoir of a well to be treated is a strip-shaped high-water-saturation oil reservoir or not;
step 2) when the reservoir of the well to be processed is a strip-shaped high-water-saturation reservoir, determining an oil-containing strip layer and a high-water-saturation strip layer, and designing a perforation position in the oil-containing strip layer;
step 3), designing transformation parameters to obtain fracturing discharge capacity and sand amount;
and 4) carrying out multi-section fixed-point modification on the oil-containing strip layer by utilizing the modification parameters designed in the step 3) and utilizing hydraulic sand-blasting perforation fracturing.
Preferably, in the step 1), whether the reservoir of the well to be processed is a strip-shaped high water-saturation oil reservoir is judged by integrating the core analysis and the well logging interpretation results, the depths corresponding to the high water-saturation and high oil-saturation characteristics in the core analysis are associated with the interpretation results corresponding to the well logging interpretation, and the reference range value of the oil-water-content correlation well logging parameter is established to distinguish the high water-saturation oil reservoir from the strip-shaped high water-saturation oil reservoir.
Example 3
The invention discloses a fracturing method for improving the development effect of a strip-shaped high-water-saturation oil reservoir, which comprises the following steps of:
step 1) judging whether a reservoir of a well to be treated is a strip-shaped high-water-saturation oil reservoir or not;
step 2) when the reservoir of the well to be processed is a strip-shaped high-water-saturation reservoir, determining an oil-containing strip layer and a high-water-saturation strip layer, and designing a perforation position in the oil-containing strip layer;
step 3), designing transformation parameters to obtain fracturing discharge capacity and sand amount;
and 4) carrying out multi-section fixed-point modification on the oil-containing strip layer by utilizing the modification parameters designed in the step 3) and utilizing hydraulic sand-blasting perforation fracturing.
Preferably, in the step 1), whether the reservoir of the well to be processed is a strip-shaped high water-saturation oil reservoir is judged by integrating the core analysis and the well logging interpretation results, the depths corresponding to the high water-saturation and high oil-saturation characteristics in the core analysis are associated with the interpretation results corresponding to the well logging interpretation, and the reference range value of the oil-water-content correlation well logging parameter is established to distinguish the high water-saturation oil reservoir from the strip-shaped high water-saturation oil reservoir.
Preferably, the reference range value of the logging parameter of the correlation between oil content and water content comprises reservoir resistance and acoustic wave time difference, and the reservoir resistance of one part of the reservoir of the well to be processed is more than 30 omega m, the acoustic wave time difference is less than 230 mu m.s, and the reservoir resistance of the other part of the reservoir is less than 30 omega m, and the acoustic wave time difference is more than 230 mu m.s, the well is a strip-shaped high-water-saturation reservoir; and when the reservoir resistance of the reservoir of the well to be treated is less than 30 omega m and the acoustic wave time difference is more than 230 mu m.s, the reservoir is a high water-saturated reservoir.
Example 4
The invention discloses a fracturing method for improving the development effect of a strip-shaped high-water-saturation oil reservoir, which comprises the following steps of:
step 1) judging whether a reservoir of a well to be treated is a strip-shaped high-water-saturation oil reservoir or not;
step 2) when the reservoir of the well to be processed is a strip-shaped high-water-saturation reservoir, determining an oil-containing strip layer and a high-water-saturation strip layer, and designing a perforation position in the oil-containing strip layer;
step 3), designing transformation parameters to obtain fracturing discharge capacity and sand amount;
and 4) carrying out multi-section fixed-point modification on the oil-containing strip layer by utilizing the modification parameters designed in the step 3) and utilizing hydraulic sand-blasting perforation fracturing.
Preferably, in the step 1), whether the reservoir of the well to be processed is a strip-shaped high water-saturation oil reservoir is judged by integrating the core analysis and the well logging interpretation results, the depths corresponding to the high water-saturation and high oil-saturation characteristics in the core analysis are associated with the interpretation results corresponding to the well logging interpretation, and the reference range value of the oil-water-content correlation well logging parameter is established to distinguish the high water-saturation oil reservoir from the strip-shaped high water-saturation oil reservoir.
Preferably, the reference range value of the logging parameter of the correlation between oil content and water content comprises reservoir resistance and acoustic wave time difference, and the reservoir resistance of one part of the reservoir of the well to be processed is more than 30 omega m, the acoustic wave time difference is less than 230 mu m.s, and the reservoir resistance of the other part of the reservoir is less than 30 omega m, and the acoustic wave time difference is more than 230 mu m.s, the well is a strip-shaped high-water-saturation reservoir; and when the reservoir resistance of the reservoir of the well to be treated is less than 30 omega m and the acoustic wave time difference is more than 230 mu m.s, the reservoir is a high water-saturated reservoir.
Preferably, in the step 2), the oil-containing strip layer and the high-water saturation strip layer are judged according to the reservoir resistance and the acoustic wave time difference, wherein the reservoir resistance is more than 30 Ω m, the acoustic wave time difference is less than 230 μm.s, the oil-containing strip layer is obtained, the reservoir resistance is less than 30 Ω m, the acoustic wave time difference is more than 230 μm.s, the high-water saturation strip layer is obtained, and the perforation position is designed in the oil-containing strip layer.
Example 5
The invention discloses a fracturing method for improving the development effect of a strip-shaped high-water-saturation oil reservoir, which comprises the following steps of:
step 1) judging whether a reservoir of a well to be treated is a strip-shaped high-water-saturation oil reservoir or not;
step 2) when the reservoir of the well to be processed is a strip-shaped high-water-saturation reservoir, determining an oil-containing strip layer and a high-water-saturation strip layer, and designing a perforation position in the oil-containing strip layer;
step 3), designing transformation parameters to obtain fracturing discharge capacity and sand amount;
and 4) carrying out multi-section fixed-point modification on the oil-containing strip layer by utilizing the modification parameters designed in the step 3) and utilizing hydraulic sand-blasting perforation fracturing.
Preferably, in the step 1), whether the reservoir of the well to be processed is a strip-shaped high water-saturation oil reservoir is judged by integrating the core analysis and the well logging interpretation results, the depths corresponding to the high water-saturation and high oil-saturation characteristics in the core analysis are associated with the interpretation results corresponding to the well logging interpretation, and the reference range value of the oil-water-content correlation well logging parameter is established to distinguish the high water-saturation oil reservoir from the strip-shaped high water-saturation oil reservoir.
Preferably, the reference range value of the logging parameter of the correlation between oil content and water content comprises reservoir resistance and acoustic wave time difference, and the reservoir resistance of one part of the reservoir of the well to be processed is more than 30 omega m, the acoustic wave time difference is less than 230 mu m.s, and the reservoir resistance of the other part of the reservoir is less than 30 omega m, and the acoustic wave time difference is more than 230 mu m.s, the well is a strip-shaped high-water-saturation reservoir; and when the reservoir resistance of the reservoir of the well to be treated is less than 30 omega m and the acoustic wave time difference is more than 230 mu m.s, the reservoir is a high water-saturated reservoir.
Preferably, in the step 2), the oil-containing strip layer and the high-water saturation strip layer are judged according to the reservoir resistance and the acoustic wave time difference, wherein the reservoir resistance is more than 30 Ω m, the acoustic wave time difference is less than 230 μm.s, the oil-containing strip layer is obtained, the reservoir resistance is less than 30 Ω m, the acoustic wave time difference is more than 230 μm.s, the high-water saturation strip layer is obtained, and the perforation position is designed in the oil-containing strip layer.
Preferably, the design and modification parameters in the step 3) are specifically as follows:
step 3-1) establishing a fracturing geological model with parameters of permeability, ground stress and Young modulus according to the characteristics of the strip-shaped oil-bearing reservoir;
step 3-2) correcting the fracturing geological model in the step 3-1) according to the thickness, permeability, ground stress and Young modulus parameters of the oil-containing strip layer and the high water saturation strip layer of the reservoir of the well to be treated;
and 3-3) operating a fractured geological model by using FracPT fracturing software, inputting permeability, crustal stress and Young modulus in the FracPT fracturing software, controlling the height of a crack to be 5-15 m and the length of the crack to be 100-120 m, and finally obtaining the fracturing discharge capacity and the sand amount.
Example 6
The invention discloses a fracturing method for improving the development effect of a strip-shaped high-water-saturation oil reservoir, which comprises the following steps of:
step 1) judging whether a reservoir of a well to be treated is a strip-shaped high-water-saturation oil reservoir or not;
step 2) when the reservoir of the well to be processed is a strip-shaped high-water-saturation reservoir, determining an oil-containing strip layer and a high-water-saturation strip layer, and designing a perforation position in the oil-containing strip layer;
step 3), designing transformation parameters to obtain fracturing discharge capacity and sand amount;
and 4) carrying out multi-section fixed-point modification on the oil-containing strip layer by utilizing the modification parameters designed in the step 3) and utilizing hydraulic sand-blasting perforation fracturing.
Preferably, in the step 1), whether the reservoir of the well to be processed is a strip-shaped high water-saturation oil reservoir is judged by integrating the core analysis and the well logging interpretation results, the depths corresponding to the high water-saturation and high oil-saturation characteristics in the core analysis are associated with the interpretation results corresponding to the well logging interpretation, and the reference range value of the oil-water-content correlation well logging parameter is established to distinguish the high water-saturation oil reservoir from the strip-shaped high water-saturation oil reservoir.
Preferably, the reference range value of the logging parameter of the correlation between oil content and water content comprises reservoir resistance and acoustic wave time difference, and the reservoir resistance of one part of the reservoir of the well to be processed is more than 30 omega m, the acoustic wave time difference is less than 230 mu m.s, and the reservoir resistance of the other part of the reservoir is less than 30 omega m, and the acoustic wave time difference is more than 230 mu m.s, the well is a strip-shaped high-water-saturation reservoir; and when the reservoir resistance of the reservoir of the well to be treated is less than 30 omega m and the acoustic wave time difference is more than 230 mu m.s, the reservoir is a high water-saturated reservoir.
Preferably, in the step 2), the oil-containing strip layer and the high-water saturation strip layer are judged according to the reservoir resistance and the acoustic wave time difference, wherein the reservoir resistance is more than 30 Ω m, the acoustic wave time difference is less than 230 μm.s, the oil-containing strip layer is obtained, the reservoir resistance is less than 30 Ω m, the acoustic wave time difference is more than 230 μm.s, the high-water saturation strip layer is obtained, and the perforation position is designed in the oil-containing strip layer.
Preferably, the design and modification parameters in the step 3) are specifically as follows:
step 3-1) establishing a fracturing geological model with parameters of permeability, ground stress and Young modulus according to the characteristics of the strip-shaped oil-bearing reservoir;
step 3-2) correcting the fracturing geological model in the step 3-1) according to the thickness, permeability, ground stress and Young modulus parameters of the oil-containing strip layer and the high water saturation strip layer of the reservoir of the well to be treated;
and 3-3) operating a fractured geological model by using FracPT fracturing software, inputting permeability, crustal stress and Young modulus in the FracPT fracturing software, controlling the height of a crack to be 5-15 m and the length of the crack to be 100-120 m, and finally obtaining the fracturing discharge capacity and the sand amount.
Preferably, in the step 4), differential fracturing modification parameters are established by utilizing the modification parameters designed in the step 3), namely, different distances correspond to different fracturing discharge capacities and sand volumes, and when the distance between the oil-containing strip layer and the high water saturation strip layer is 5-15 m, the fracturing discharge capacity is 1.0-2.2 m3A sand amount of 15-30 m/min3。
Example 7
The invention discloses a fracturing method for improving the development effect of a strip-shaped high-water-saturation oil reservoir, which comprises the following steps of:
step 1) judging whether a reservoir of a well to be treated is a strip-shaped high-water-saturation oil reservoir or not;
step 2) when the reservoir of the well to be processed is a strip-shaped high-water-saturation reservoir, determining an oil-containing strip layer and a high-water-saturation strip layer, and designing a perforation position in the oil-containing strip layer;
step 3), designing transformation parameters to obtain fracturing discharge capacity and sand amount;
and 4) carrying out multi-section fixed-point modification on the oil-containing strip layer by utilizing the modification parameters designed in the step 3) and utilizing hydraulic sand-blasting perforation fracturing.
Preferably, in the step 1), whether the reservoir of the well to be processed is a strip-shaped high water-saturation oil reservoir is judged by integrating the core analysis and the well logging interpretation results, the depths corresponding to the high water-saturation and high oil-saturation characteristics in the core analysis are associated with the interpretation results corresponding to the well logging interpretation, and the reference range value of the oil-water-content correlation well logging parameter is established to distinguish the high water-saturation oil reservoir from the strip-shaped high water-saturation oil reservoir.
Preferably, the reference range value of the logging parameter of the correlation between oil content and water content comprises reservoir resistance and acoustic wave time difference, and the reservoir resistance of one part of the reservoir of the well to be processed is more than 30 omega m, the acoustic wave time difference is less than 230 mu m.s, and the reservoir resistance of the other part of the reservoir is less than 30 omega m, and the acoustic wave time difference is more than 230 mu m.s, the well is a strip-shaped high-water-saturation reservoir; and when the reservoir resistance of the reservoir of the well to be treated is less than 30 omega m and the acoustic wave time difference is more than 230 mu m.s, the reservoir is a high water-saturated reservoir.
Preferably, in the step 2), the oil-containing strip layer and the high-water saturation strip layer are judged according to the reservoir resistance and the acoustic wave time difference, wherein the reservoir resistance is more than 30 Ω m, the acoustic wave time difference is less than 230 μm.s, the oil-containing strip layer is obtained, the reservoir resistance is less than 30 Ω m, the acoustic wave time difference is more than 230 μm.s, the high-water saturation strip layer is obtained, and the perforation position is designed in the oil-containing strip layer.
Preferably, the design and modification parameters in the step 3) are specifically as follows:
step 3-1) establishing a fracturing geological model with parameters of permeability, ground stress and Young modulus according to the characteristics of the strip-shaped oil-bearing reservoir;
step 3-2) correcting the fracturing geological model in the step 3-1) according to the thickness, permeability, ground stress and Young modulus parameters of the oil-containing strip layer and the high water saturation strip layer of the reservoir of the well to be treated;
and 3-3) operating a fractured geological model by using FracPT fracturing software, inputting permeability, crustal stress and Young modulus in the FracPT fracturing software, controlling the height of a crack to be 5-15 m and the length of the crack to be 100-120 m, and finally obtaining the fracturing discharge capacity and the sand amount.
Preferably, in the step 4), differential fracturing modification parameters are established by utilizing the modification parameters designed in the step 3), namely, different distances correspond to different fracturing discharge capacities and sand volumes, and when the distance between the oil-containing strip layer and the high water saturation strip layer is 5-15 m, the fracturing discharge capacity is 1.0-2.2 m3A sand amount of 15-30 m/min3。
Preferably, when the distance between the oil-containing strip layer and the high water saturation strip layer is 5m, the fracturing discharge capacity is 1.0-1.2 m3Min, sand amount 15m3(ii) a When the distance between the oil-containing strip layer and the high water saturation strip layer is 10m, the fracturing discharge capacity is 1.4-1.6 m3A sand amount of 20 to 25 m/min3(ii) a When the distance between the oil-containing strip layer and the high water saturation strip layer is 15m, the fracturing discharge capacity is 1.8-2.2 m3Min, sand amount 30m3。
Example 8
The invention discloses a fracturing method for improving the development effect of a strip-shaped high-water-saturation oil reservoir, which comprises the following steps of:
step 1) judging whether a reservoir of a well to be treated is a strip-shaped high-water-saturation oil reservoir or not;
step 2) when the reservoir of the well to be processed is a strip-shaped high-water-saturation reservoir, determining an oil-containing strip layer and a high-water-saturation strip layer, and designing a perforation position in the oil-containing strip layer;
step 3), designing transformation parameters to obtain fracturing discharge capacity and sand amount;
and 4) carrying out multi-section fixed-point modification on the oil-containing strip layer by utilizing the modification parameters designed in the step 3) and utilizing hydraulic sand-blasting perforation fracturing.
Preferably, in the step 1), whether the reservoir of the well to be processed is a strip-shaped high water-saturation oil reservoir is judged by integrating the core analysis and the well logging interpretation results, the depths corresponding to the high water-saturation and high oil-saturation characteristics in the core analysis are associated with the interpretation results corresponding to the well logging interpretation, and the reference range value of the oil-water-content correlation well logging parameter is established to distinguish the high water-saturation oil reservoir from the strip-shaped high water-saturation oil reservoir.
Preferably, the reference range value of the logging parameter of the correlation between oil content and water content comprises reservoir resistance and acoustic wave time difference, and when the reservoir resistance is more than 30 omega m and the acoustic wave time difference is less than 230 mu m.s, the oil reservoir is a strip-shaped high-water-saturation oil reservoir; and when the reservoir resistance is less than 30 omega m and the acoustic wave time difference is more than 230 mu m.s, the reservoir is a high water-saturated reservoir.
Preferably, in the step 2), the oil-containing strip layer and the high-water saturation strip layer are judged according to the reservoir resistance and the acoustic wave time difference, wherein the reservoir resistance is more than 30 Ω m, the acoustic wave time difference is less than 230 μm.s, the oil-containing strip layer is obtained, the reservoir resistance is less than 30 Ω m, the acoustic wave time difference is more than 230 μm.s, the high-water saturation strip layer is obtained, and the perforation position is designed in the oil-containing strip layer.
Preferably, the design and modification parameters in the step 3) are specifically as follows:
step 3-1) establishing a fracturing geological model with parameters of permeability, ground stress and Young modulus according to the characteristics of the strip-shaped oil-bearing reservoir;
step 3-2) correcting the fracturing geological model in the step 3-1) according to the thickness, permeability, ground stress and Young modulus parameters of the oil-containing strip layer and the high water saturation strip layer of the reservoir of the well to be treated;
and 3-3) operating a fractured geological model by using FracPT fracturing software, inputting permeability, crustal stress and Young modulus in the FracPT fracturing software, controlling the height of a crack to be 5-15 m and the length of the crack to be 100-120 m, and finally obtaining the fracturing discharge capacity and the sand amount.
Preferably, in the step 4), differential fracturing modification parameters are established by utilizing the modification parameters designed in the step 3), namely, different distances correspond to different fracturing discharge capacities and sand volumes, and when the distance between the oil-containing strip layer and the high water saturation strip layer is 5-15 m, the fracturing discharge capacity is 1.0-2.2 m3Min, amount of sandIs 15 to 30m3。
Preferably, when the distance between the oil-containing strip layer and the high water saturation strip layer is 5m, the fracturing discharge capacity is 1.0-1.2 m3Min, sand amount 15m3(ii) a When the distance between the oil-containing strip layer and the high water saturation strip layer is 10m, the fracturing discharge capacity is 1.4-1.6 m3A sand amount of 20 to 25 m/min3(ii) a When the distance between the oil-containing strip layer and the high water saturation strip layer is 15m, the fracturing discharge capacity is 1.8-2.2 m3Min, sand amount 30m3。
Preferably, the length of the hydraulic sand blasting perforation fracturing perforation segment in the step 4) is 10cm, and the number of the perforations is 4-6.
Example 9
Taking a yellow 43 long 8-strip high-water-saturation reservoir development area as an example, comparing the core analysis and the well logging interpretation result of the area to obtain a well logging interpretation result, wherein the well logging interpretation result comprises a reservoir resistance greater than 30 omega m, an acoustic wave time difference less than 230 mu m.s, an oil-containing strip layer with an oil saturation greater than 40%, the reservoir resistance less than 30 omega m, the acoustic wave time difference greater than 230 mu m.s, and an oil-containing strip layer with an oil saturation less than 40%, and the area is a strip high-water-saturation reservoir, wherein the oil-containing strip layers are 3; then, a fracturing geological model with permeability, ground stress and Young modulus parameters is established (the fracturing geological model is a model carried by FracPT fracturing software, and a required geological model can be formed only by inputting relevant parameters, belonging to the prior art), wherein the permeability of a reservoir with the length of yellow 43 and the length of 8 is 0.85mD, the formation stress is 31.4MPa, and the Young modulus is 2.0 multiplied by 104Introducing a well logging interpretation result to be processed into FracPT fracturing software under MPa, wherein numerical values comprise the thickness and the permeability of an oil-containing strip layer (the thickness of the oil-containing strip layer is 5-12 m, the permeability is 0.8-0.9 mD, and the number of oil layers is 3), the thickness and the permeability of a high-water-saturation strip layer (the thickness of the high-water-saturation strip layer is 5m, the permeability is 1.2-1.4 mD, and the number of water layers is 3), adjusting the ground stress and Young modulus parameters of the oil-containing strip layer and the high-water-saturation strip layer, and correcting a fracturing geological model; and (3) running a fractured geological model by applying FracPT fracturing software, and simultaneously changing the distances between the oil-containing strip layer and the high water saturation layer to be 5m, 10m and 12m to obtain fracturing discharge capacity and sand amount of different oil-containing strip layer thicknesses: when the distance isAt 5m, the fracturing output is preferably 1.0m3Min, sand amount 15m3(ii) a When the distance is 10m, the fracturing discharge capacity is 1.4m3Min, sand amount 20m3(ii) a When the distance is 12m, the fracturing discharge capacity is 1.8m3Min, sand amount 30m3(ii) a And then carrying out multi-section fixed-point transformation on the 3 oil-containing strip layers through hydraulic sand blasting perforation fracturing, wherein the length of the perforation section is 10cm, and the number of the perforations is 4-6.
As shown in figure 1, after the block is transformed by multi-section differential hydraulic sand blasting fracturing, the average single-well yield of the block reaches 3.0-3.5 t/d at the initial stage and the water content is 50-60%, and after three-small-one low fracturing, the average single-well yield of the block is 2.5-2.7 t/d at the initial stage and the water content is 65-80%, so that the fracturing method can effectively improve the single-well yield and has a remarkable water content reducing effect.
The hydraulic sand-blasting perforation fracturing technology is adopted to realize multi-section fixed-point modification of the oil-containing strip layer, on one hand, the hydraulic sand-blasting perforation realizes fixed-point fracture initiation and seam height control, and the fracture is prevented from channeling to a high-water saturated layer section, on the other hand, the hydraulic jet fracturing can realize the increase of modification scale, increase of transverse penetration depth and increase of single well yield.
The hydraulic sand-blasting perforation fracturing technology is adopted, because the length of a hydraulic sand-blasting perforation segment is only 10cm, the number of the perforations is reduced by only 4-6 perforations, and in the fracturing process, because stress is concentrated on points, compared with the conventional perforation (the length of the perforation segment is at least 1m, and the number of the perforations is 16 holes/m), the height of a crack is not easy to excessively expand from top to bottom, the height of the crack is ensured to extend in an oil-containing strip layer, and the requirement of the transformation of the multi-segment oil-containing strip layer is met under the condition of effectively avoiding water channeling layer compression.
The invention provides a fracturing method for improving the strip-shaped high-water-saturation reservoir development effect, which realizes the fracturing of a reservoir with larger thickness and strip-shaped oil-containing characteristics in the longitudinal direction, can realize deep fracturing transformation on an oil-containing strip layer in a targeted manner, avoids the pressing through of the high-water-saturation strip layer, reduces the production water content while improving the yield of a single well, reduces the serious burden of a gathering system and a sewage treatment system, and improves the development effect.
According to the method, a fracturing transformation idea for treating the high water-saturated oil reservoir and the strip-shaped high water-saturated oil reservoir in a distinguishing manner is provided according to corresponding analysis of core analysis and well logging interpretation results, the strip-shaped high water-saturated oil reservoir is divided into an oil-containing strip layer and a high water-saturated strip layer, hydraulic sand blasting perforation fracturing is only carried out on the oil-containing strip layer, fixed-point transformation and multi-section fracturing are carried out, the seam height is controlled, the seam length is increased, and therefore the production efficiency is effectively improved.
The hydraulic sand blasting perforation fracturing can realize fixed-point fracturing, control the fracture height, avoid the fracture from channeling to a high-water-saturation strip interval, simultaneously realize the enlargement of the transformation scale, increase the transverse penetration depth and improve the single well yield, and purposefully adjust the commonly used small-scale fracturing, centralized perforation, large-scale fracturing and other fracturing transformation modes in the past into hydraulic sand blasting fixed-point multi-section fracturing, thereby improving the single well yield and reducing the water content in production.
The invention establishes a strip high water-saturation reservoir fracturing geological model, and provides that crack simulation is carried out according to the distance and physical property difference (permeability, ground stress and Young modulus parameters) between an oil-containing strip layer and a high water-saturation strip layer, so that differentiated transformation parameters are obtained, the optimal fracturing discharge capacity and sand content of hydraulic sand-blasting perforation fracturing of each oil-containing strip layer are obtained, and the development effect is improved.
While the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Many other changes and modifications can be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, but only by the scope of the appended claims. The components and structures of the present embodiments that are not described in detail are well known in the art and do not constitute essential structural elements or elements.
Claims (8)
1. A fracturing method for improving the development effect of a strip-shaped high-water-saturation oil reservoir is characterized by comprising the following steps of:
step 1) judging whether a reservoir of a well to be treated is a strip-shaped high-water-saturation oil reservoir or not;
step 2) when the reservoir of the well to be processed is a strip-shaped high-water-saturation reservoir, determining an oil-containing strip layer and a high-water-saturation strip layer, and designing a perforation position in the oil-containing strip layer;
step 3), designing transformation parameters to obtain fracturing discharge capacity and sand amount;
and 4) carrying out multi-section fixed-point modification on the oil-containing strip layer by utilizing the modification parameters designed in the step 3) and utilizing hydraulic sand-blasting perforation fracturing.
2. The fracturing method for improving the exploitation effect of the strip-shaped high water-saturation reservoir according to claim 1, wherein the fracturing method comprises the following steps: and step 1) judging whether the reservoir of the well to be processed is a strip-shaped high-water-saturation reservoir or not by integrating the core analysis and the logging interpretation results, and establishing a reference range value of logging parameters related to oil and water contents by correlating the depths corresponding to the high-water-saturation and high-oil-saturation characteristics in the core analysis with the interpretation results corresponding to the logging interpretation so as to distinguish the high-water-saturation reservoir from the strip-shaped high-water-saturation reservoir.
3. The fracturing method for improving the exploitation effect of the strip-shaped high water-saturation reservoir according to claim 2, wherein the fracturing method comprises the following steps: the reference range value of the logging parameter of the correlation between the oil content and the water content comprises reservoir resistance and acoustic wave time difference, and the reservoir resistance of one part of a well to be processed is more than 30 omega m, the acoustic wave time difference is less than 230 mu m.s, and the reservoir resistance of the other part of the reservoir is less than 30 omega m, and the acoustic wave time difference is more than 230 mu m.s, the well is a strip-shaped high-water-saturation reservoir; and when the reservoir resistance of the reservoir of the well to be treated is less than 30 omega m and the acoustic wave time difference is more than 230 mu m.s, the reservoir is a high water-saturated reservoir.
4. The fracturing method for improving the exploitation effect of the strip-shaped high water-saturation reservoir according to claim 3, wherein the fracturing method comprises the following steps: and 2) judging the oil-containing strip layer and the high-water-saturation strip layer according to the reservoir resistance and the acoustic wave time difference, wherein the reservoir resistance is more than 30 omega m, the acoustic wave time difference is less than 230 mu m.s, the oil-containing strip layer is obtained, the reservoir resistance is less than 30 omega m, the acoustic wave time difference is more than 230 mu m.s, the high-water-saturation strip layer is obtained, and the perforation position is designed in the oil-containing strip layer.
5. The fracturing method for improving the development effect of the strip-shaped high water-saturation reservoir according to claim 1, wherein the design and modification parameters in the step 3) are specifically as follows:
step 3-1) establishing a fracturing geological model with parameters of permeability, ground stress and Young modulus according to the characteristics of the strip-shaped oil-bearing reservoir;
step 3-2) correcting the fracturing geological model in the step 3-1) according to the thickness, permeability, ground stress and Young modulus parameters of the oil-containing strip layer and the high water saturation strip layer of the reservoir of the well to be treated;
and 3-3) operating a fractured geological model by using FracPT fracturing software, inputting permeability, crustal stress and Young modulus in the FracPT fracturing software, controlling the height of a crack to be 5-15 m and the length of the crack to be 100-120 m, and finally obtaining the fracturing discharge capacity and the sand amount.
6. The fracturing method for improving the development effect of the strip-shaped high water saturation reservoir according to claim 5, wherein in the step 4), differential fracturing transformation parameters are established by utilizing the transformation parameters designed in the step 3), namely, different distances correspond to different fracturing discharge capacities and sand volumes, and when the distance between the oil-containing strip layer and the high water saturation strip layer is 5-15 m, the fracturing discharge capacity is 1.0-2.2 m3A sand amount of 15-30 m/min3。
7. The fracturing method for improving the exploitation effect of the strip-shaped high water-saturation reservoir according to claim 6, wherein the fracturing method comprises the following steps: when the distance between the oil-containing strip layer and the high water saturation strip layer is 5m, the fracturing discharge capacity is 1.0-1.2 m3Min, sand amount 15m3(ii) a When the distance between the oil-containing strip layer and the high water saturation strip layer is 10m, the fracturing discharge capacity is 1.4-1.6 m3A sand amount of 20 to 25 m/min3(ii) a When the distance between the oil-containing strip layer and the high water saturation strip layer is 15m, the fracturing discharge capacity is 1.8-2.2 m3Min, sand amount 30m3。
8. The fracturing method for improving the exploitation effect of the strip-shaped high water saturation reservoir according to claim 6, wherein the length of the hydraulic sand blasting perforation fracturing perforation in the step 4) is 10cm, and the number of the perforations is 4-6.
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Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101260803A (en) * | 2007-03-07 | 2008-09-10 | 中国石油天然气股份有限公司 | Method for monitoring oilfield high infiltration strip |
| US20110206459A1 (en) * | 2009-06-23 | 2011-08-25 | Tunget Bruce A | Appatus and methods for forming and using subterranean salt cavern |
| CN102733789A (en) * | 2012-07-06 | 2012-10-17 | 崔彦立 | Staged fracturing construction yield increment method for waterpower in deep thickened oil deposit thick-bedded sandstone storage layer |
| CN102808584A (en) * | 2012-07-27 | 2012-12-05 | 中国石油天然气股份有限公司 | Mechanical water plugging pipe column for multi-point discharge of cased hole completion multi-section fractured horizontal well and method |
| CN102852546A (en) * | 2011-06-30 | 2013-01-02 | 河南煤业化工集团研究院有限责任公司 | Method for pre-pumping coal roadway stripe gas of single soft protruded coal seam of unexploited area |
| US20130118737A1 (en) * | 2011-11-16 | 2013-05-16 | Resource Innovations Inc. | Method for initiating circulation for steam assisted gravity drainage |
| CN104251137A (en) * | 2013-06-28 | 2014-12-31 | 中国石油化工股份有限公司 | Interlayer identification prediction method in fluvial facies thick oil layer |
| RU2537719C1 (en) * | 2013-10-29 | 2015-01-10 | Открытое акционерное общество "Татнефть" имени В.Д. Шашина | Method of multiple hydrofracturing of formation in open hole of horizontal well |
| CN104727795A (en) * | 2015-02-14 | 2015-06-24 | 河南理工大学 | Low-permeability soft coal seam extra-thin layer water jetting exploiting permeability increasing method |
| CN105089594A (en) * | 2014-05-22 | 2015-11-25 | 中国石油化工股份有限公司 | Water-control effect-enhancing fracturing method of carbonate reservoir |
| CN105201484A (en) * | 2015-10-29 | 2015-12-30 | 西南石油大学 | Vertical well separate layer fracturing interval optimization and construction parameter optimization designing method |
| CN105317407A (en) * | 2015-10-15 | 2016-02-10 | 中国石油天然气股份有限公司 | Development method of untabulated reservoir in extra-high water-cut period |
| CN105464639A (en) * | 2015-12-29 | 2016-04-06 | 中国石油天然气股份有限公司 | Bottom water reservoir fracturing method adopting water-deformable propping agent to control water breakthrough |
| CN106845685A (en) * | 2016-12-26 | 2017-06-13 | 中国石油天然气股份有限公司 | A kind of parameter optimization method for reducing horizontal well oil testing and fracture operating cost |
| CN110130882A (en) * | 2019-01-25 | 2019-08-16 | 中国石油天然气集团有限公司 | A kind of oil reservoir region evaluation method based on well logging test data |
-
2019
- 2019-11-22 CN CN201911154229.XA patent/CN110984944B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101260803A (en) * | 2007-03-07 | 2008-09-10 | 中国石油天然气股份有限公司 | Method for monitoring oilfield high infiltration strip |
| US20110206459A1 (en) * | 2009-06-23 | 2011-08-25 | Tunget Bruce A | Appatus and methods for forming and using subterranean salt cavern |
| CN102852546A (en) * | 2011-06-30 | 2013-01-02 | 河南煤业化工集团研究院有限责任公司 | Method for pre-pumping coal roadway stripe gas of single soft protruded coal seam of unexploited area |
| US20130118737A1 (en) * | 2011-11-16 | 2013-05-16 | Resource Innovations Inc. | Method for initiating circulation for steam assisted gravity drainage |
| CN102733789A (en) * | 2012-07-06 | 2012-10-17 | 崔彦立 | Staged fracturing construction yield increment method for waterpower in deep thickened oil deposit thick-bedded sandstone storage layer |
| CN102808584A (en) * | 2012-07-27 | 2012-12-05 | 中国石油天然气股份有限公司 | Mechanical water plugging pipe column for multi-point discharge of cased hole completion multi-section fractured horizontal well and method |
| CN104251137A (en) * | 2013-06-28 | 2014-12-31 | 中国石油化工股份有限公司 | Interlayer identification prediction method in fluvial facies thick oil layer |
| RU2537719C1 (en) * | 2013-10-29 | 2015-01-10 | Открытое акционерное общество "Татнефть" имени В.Д. Шашина | Method of multiple hydrofracturing of formation in open hole of horizontal well |
| CN105089594A (en) * | 2014-05-22 | 2015-11-25 | 中国石油化工股份有限公司 | Water-control effect-enhancing fracturing method of carbonate reservoir |
| CN104727795A (en) * | 2015-02-14 | 2015-06-24 | 河南理工大学 | Low-permeability soft coal seam extra-thin layer water jetting exploiting permeability increasing method |
| CN105317407A (en) * | 2015-10-15 | 2016-02-10 | 中国石油天然气股份有限公司 | Development method of untabulated reservoir in extra-high water-cut period |
| CN105201484A (en) * | 2015-10-29 | 2015-12-30 | 西南石油大学 | Vertical well separate layer fracturing interval optimization and construction parameter optimization designing method |
| CN105464639A (en) * | 2015-12-29 | 2016-04-06 | 中国石油天然气股份有限公司 | Bottom water reservoir fracturing method adopting water-deformable propping agent to control water breakthrough |
| CN106845685A (en) * | 2016-12-26 | 2017-06-13 | 中国石油天然气股份有限公司 | A kind of parameter optimization method for reducing horizontal well oil testing and fracture operating cost |
| CN110130882A (en) * | 2019-01-25 | 2019-08-16 | 中国石油天然气集团有限公司 | A kind of oil reservoir region evaluation method based on well logging test data |
Non-Patent Citations (3)
| Title |
|---|
| 解金凤: "窄条状油藏裂缝对开发的影响", 《内江科技》 * |
| 马兵等: "新型缝网压裂技术在镇北致密储层的研究与应用", 《科学技术与工程》 * |
| 高建等: "低渗透砂岩油藏单砂体内部相对高渗透段定量识别", 《中国石油大学学报(自然科学版)》 * |
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