CN102071903A - Method for calculating dosage of horizontal well chemical water shutoff agent - Google Patents
Method for calculating dosage of horizontal well chemical water shutoff agent Download PDFInfo
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- CN102071903A CN102071903A CN2011100079240A CN201110007924A CN102071903A CN 102071903 A CN102071903 A CN 102071903A CN 2011100079240 A CN2011100079240 A CN 2011100079240A CN 201110007924 A CN201110007924 A CN 201110007924A CN 102071903 A CN102071903 A CN 102071903A
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Abstract
The invention relates to the technical field of petroleum production engineering, in particular to a method for calculating the dosage of a horizontal well chemical water shutoff agent. In the method, the dosage of the water shutoff agent is calculated by selecting a cuboid model or a cylindrical notched model according to a water invasion type; and the water invasion type comprises edge water drive, bottom water drive or common edge water and bottom water drive. By the method for calculating the dosage of the horizontal well chemical water shutoff agent, the dosage of the water shutoff agent is quickly and easily calculated, and the method has high operability; meanwhile, the amount of the used water shutoff agent for horizontal well chemical water shutoff is optimized; over-high cost is avoided due to over-much injected shutoff agent; the water shutoff effect is guaranteed; the sweep efficiency is improved; and the oil field recovery ratio is improved.
Description
Technical field
The present invention relates to technical field of oil production engineering, be specifically related to a kind of horizontal well chemical water shutoff agent consumption computational methods.
Background technology
Along with going deep into of oil field development, horizontal well well number constantly increases, and horizontal well development oil field comprehensive water cut raises year by year, and the high-permeability pay water outlet is serious, and the low permeability pay productive potentialities are difficult to performance, and the effective water-plugging technique of horizontal production well is demanded development urgently.In the horizontal well chemical water shutoff, the high score subclass blocking agent unit price that relates to is higher, keeps low-cost when guaranteeing water plugging effect, could obtain higher economic benefit.More to water plugging of horizontal well agent research both at home and abroad, yet to the Research on Calculation of water plugging of horizontal well agent consumption seldom.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of horizontal well chemical water shutoff agent consumption computational methods, optimize the water shutoff agent consumption of horizontal well chemical water shutoff, neither can too much inject blocking agent and cause cost too high, guaranteed water plugging effect again, improve sweep efficiency, improve oil recovery rate.
In order to achieve the above object, the technical solution used in the present invention is:
A kind of horizontal well chemical water shutoff agent consumption computational methods, described method are to lack model according to water enchroachment (invasion) type selecting cuboid model or post to calculate the water shutoff agent consumption; Water drove jointly at the bottom of described water enchroachment (invasion) type comprised the moving or limit of edge water drive, bottom water drive.
In the such scheme,, then select the cuboid model to calculate the water shutoff agent consumption if the water enchroachment (invasion) type is edge water drive; If the water enchroachment (invasion) type to be bottom water drive moving or the limit at the bottom of water drive jointly, then select post to lack model and calculate the water shutoff agent consumption.
In the such scheme, described cuboid model is V=α φ abc,
In the formula, α-flooded area coefficient;
The maximum horizontal degree of depth that the a-water shutoff agent distributes, unit is a rice;
The horizontal pay interval length of b-, unit is a rice;
C-core intersection, unit are rice.
In the such scheme, described post lacks model and is
In the formula, α-flooded area coefficient;
-oil reservoir degree of porosity;
A-half length of bow, the maximum horizontal degree of depth that water shutoff agent distributes, unit is a rice;
The horizontal pay interval length of b-, unit is a rice;
The c-rise, the maximum perpendicular degree of depth that water shutoff agent distributes, unit is a rice.
In the such scheme, definite method of the maximum horizontal degree of depth that water shutoff agent distributes in the described cuboid model is: if limit water apart from the measure oil well more than or equal to 5 times of core intersections, then the maximum horizontal degree of depth is got 4 to 10 times of core intersection, if less than 5 times of core intersections, then the maximum horizontal degree of depth need guarantee that water shutoff agent enters 2 to 5 times of core intersections of limit water to limit water apart from the measure oil well.
In the such scheme, definite method that described post lacks the maximum horizontal degree of depth that water shutoff agent distributes in the model is: if limit water apart from the measure oil well more than or equal to 5 times of core intersections, then the maximum horizontal degree of depth is got 4 to 10 times of core intersection, if less than 5 times of core intersections, then the maximum horizontal degree of depth need guarantee that water shutoff agent enters 2 to 5 times of core intersections of limit water to limit water apart from the measure oil well; Definite method that described post lacks the maximum perpendicular degree of depth that water shutoff agent distributes in the model is: the maximum perpendicular degree of depth that water shutoff agent distributes need guarantee that water shutoff agent enters 1 to 2 times of core intersection of bottom aquifer.
Compared with prior art, the beneficial effect of the technical solution used in the present invention generation is as follows:
Horizontal well chemical water shutoff agent consumption computational methods provided by the invention, it is simple fast, workable to calculate the water shutoff agent consumption; Optimize the water shutoff agent consumption of horizontal well chemical water shutoff simultaneously, neither can too much inject blocking agent and cause cost too high, guaranteed water plugging effect again, improved sweep efficiency, improved oil recovery rate.
Description of drawings
Fig. 1 is the schematic diagram that calculates the cuboid model of water shutoff agent consumption in the embodiment of the invention;
Fig. 2 is the schematic diagram that calculates the scarce model of post of water shutoff agent consumption in the embodiment of the invention.
The specific embodiment
Below in conjunction with drawings and Examples technical solution of the present invention is described in detail.
Embodiment 1:
Embodiment 1 provides a kind of horizontal well chemical water shutoff agent consumption computational methods, is applied to a bite oil well G160-P6 of high shallow South Area.Operation Nm II 2 substratums, day at initial stage production fluid 37.2t, day produce oil 29.6t, moisture 20.5%.Water blockoff production fluid day before yesterday 113.2t, day produce oil 3.3t, moisture 97.1%.
Nm II 2 is the stratiform edge water drive oil reservoirs of being constructed control, and limit water to pit shaft, causes that oil well produces water along nearly horizontal direction channelling.Therefore, the water shutoff agent consumption is pressed the calculating of cuboid model.
2 layers of core intersection 7m of Nm II, degree of porosity is 0.31, data shows that 1908-1954m, 1976-2008m well section reservoir properties are good, may be main water outlet position, so the maximum horizontal degree of depth that water shutoff agent distributes is got 78 meters.The horizontal depth that water shutoff agent enters is got 45m, and the flooded area coefficient gets 0.15.
Calculate plug agent amount according to the cuboid model:
V＝αφabc＝0.15×0.31×45×78×7＝1145m
3
Plug water construction process: be lowered to water plugging string after the sand washing, with 3～8m
3The discharge capacity of/h is annotated clear water 20m
3, with 3～8m
3The discharge capacity of/h is injected water shutoff agent 1145m
3, annotate high concentration polymer solution 10m
3, annotate a high sewage 91m
3, closing well 2 days.
Daily fluid production rate is reduced to 37t behind the plug water construction, oil production is kept the preceding level of measure, construction back is under the constant substantially condition of liquid measure, oil production increases gradually, increase to 8.9t/d by 0.6t/d, illustrate that the plug agent amount prioritization scheme of the inventive method calculating can embody the water plugging effect of used selective water shutoff agent.
Embodiment 2:
Embodiment 2 provides a kind of horizontal well chemical water shutoff agent consumption computational methods, is applied to a bite horizontal well G104-5P35 of high shallow North Area.Operation Ng6 substratum, day at initial stage production fluid 31.97t, day produce oil 19.47t, moisture 39%.Water blockoff production fluid day before yesterday 222.12t, day produce oil 2.22t, moisture 99%.
Ng6 is the moving oil reservoir of block bottom water drive of being constructed control, and end water vertically ridge proceeds to pit shaft, causes that oil well produces water.Therefore, the water shutoff agent consumption is pressed the scarce model calculating of post.
The design of G104-5P35 well is carried out selective water plugging to full well section 2051.7-2143.0m.The maximum horizontal degree of depth that water shutoff agent distributes is got 30m, and horizontal pay interval length is 91.39m, and the maximum perpendicular degree of depth is got 16m, and the flooded area coefficient gets 0.35, and the oil reservoir degree of porosity is 0.30.
Lack model according to post and calculate plug agent amount:
V＝2αφabc/3＝2×0.35×0.30×30×91.39×16/3＝3071m
3
Plug water construction process: be lowered to water plugging string after the sand washing, with 3～8m
3The discharge capacity of/h is annotated a high sewage 40m
3, with 3～8m
3The discharge capacity of/h is injected water shutoff agent 3071m
3, annotate high concentration polymer solution 20m
3, annotate a high sewage 80m
3, closing well 2 days.
Daily fluid production rate is reduced to 100t behind the plug water construction, and oil production increases to 4.5t/d～9t/d by 2.22t/d, increases oily period of validity more than 2 years, and accumulative total increases oily 1200t, precipitation 87700m
3Illustrate that the plug agent amount prioritization scheme of the inventive method calculating can embody the water plugging effect of used selective water shutoff agent.
Horizontal well chemical water shutoff agent consumption computational methods provided by the invention, it is simple fast, workable to calculate the water shutoff agent consumption; Optimize the water shutoff agent consumption of horizontal well chemical water shutoff simultaneously, neither can too much inject blocking agent and cause cost too high, guaranteed water plugging effect again, improved sweep efficiency, improved oil recovery rate.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. horizontal well chemical water shutoff agent consumption computational methods is characterized in that: described method is to lack model according to water enchroachment (invasion) type selecting cuboid model or post to calculate the water shutoff agent consumption; Water drove jointly at the bottom of described water enchroachment (invasion) type comprised the moving or limit of edge water drive, bottom water drive.
2. horizontal well chemical water shutoff agent consumption computational methods as claimed in claim 1 is characterized in that: if the water enchroachment (invasion) type is edge water drive, then select the cuboid model to calculate the water shutoff agent consumption; If the water enchroachment (invasion) type to be bottom water drive moving or the limit at the bottom of water drive jointly, then select post to lack model and calculate the water shutoff agent consumption.
3. horizontal well chemical water shutoff agent consumption computational methods as claimed in claim 2, it is characterized in that: described cuboid model is
,
In the formula, α-flooded area coefficient;
φ-oil reservoir degree of porosity;
The maximum horizontal degree of depth that a-water shutoff agent distributes, unit is a rice;
B-horizontal pay interval length, unit are rice;
C-core intersection, unit are rice.
4. horizontal well chemical water shutoff agent consumption computational methods as claimed in claim 2 is characterized in that: described post lacks model and is
,
In the formula, α-flooded area coefficient;
φ-oil reservoir degree of porosity;
A-half length of bow, the maximum horizontal degree of depth that water shutoff agent distributes, unit is a rice;
B-horizontal pay interval length, unit are rice;
C-rise, the maximum perpendicular degree of depth that water shutoff agent distributes, unit is a rice.
5. horizontal well chemical water shutoff agent consumption computational methods as claimed in claim 3, it is characterized in that: definite method of the maximum horizontal degree of depth that water shutoff agent distributes in the described cuboid model is: if limit water apart from the measure oil well more than or equal to 5 times of core intersections, then the maximum horizontal degree of depth is got 4 to 10 times of core intersection, if less than 5 times of core intersections, then the maximum horizontal degree of depth need guarantee that water shutoff agent enters 2 to 5 times of core intersections of limit water to limit water apart from the measure oil well.
6. horizontal well chemical water shutoff agent consumption computational methods as claimed in claim 4, it is characterized in that: definite method that described post lacks the maximum horizontal degree of depth that water shutoff agent distributes in the model is: if limit water apart from the measure oil well more than or equal to 5 times of core intersections, then the maximum horizontal degree of depth is got 4 to 10 times of core intersection, if less than 5 times of core intersections, then the maximum horizontal degree of depth need guarantee that water shutoff agent enters 2 to 5 times of core intersections of limit water to limit water apart from the measure oil well; Definite method that described post lacks the maximum perpendicular degree of depth that water shutoff agent distributes in the model is: the maximum perpendicular degree of depth that water shutoff agent distributes need guarantee that water shutoff agent enters 1 to 2 times of core intersection of bottom aquifer.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2651829C1 (en) * | 2017-06-05 | 2018-04-24 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Тюменский индустриальный университет" (ТИУ) | Method for preventing coning of bottom water in small-scale horizontal well |
| CN109145497A (en) * | 2018-09-12 | 2019-01-04 | 中国石油大学(华东) | A kind of calculation method of hydraulic fracture near horizontal wellbore water blockoff plug agent amount |
Citations (1)
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| CN1302942A (en) * | 2000-12-05 | 2001-07-11 | 石油大学(华东) | Oil recovery technique combining chemical handling with water blocking in oil well |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1302942A (en) * | 2000-12-05 | 2001-07-11 | 石油大学(华东) | Oil recovery technique combining chemical handling with water blocking in oil well |
Non-Patent Citations (3)
| Title |
|---|
| 万仁溥等: "《水平井开采技术》", 31 March 1995, 石油工业出版社 * |
| 侯君等: "底水油藏水平井水脊高度的计算", 《水动力学研究与进展》 * |
| 刘怀珠等: "水平井选择性化学堵水技术在高160-平6的先导试验研究", 《内蒙古石油化工》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2651829C1 (en) * | 2017-06-05 | 2018-04-24 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Тюменский индустриальный университет" (ТИУ) | Method for preventing coning of bottom water in small-scale horizontal well |
| CN109145497A (en) * | 2018-09-12 | 2019-01-04 | 中国石油大学(华东) | A kind of calculation method of hydraulic fracture near horizontal wellbore water blockoff plug agent amount |
| CN109145497B (en) * | 2018-09-12 | 2019-05-14 | 中国石油大学(华东) | A kind of calculation method of hydraulic fracture near horizontal wellbore water blockoff plug agent amount |
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