CN104100234A - Sectional synchronous sampling and water exploration tubular column of multi-section fracturing horizontal well and working method thereof - Google Patents
Sectional synchronous sampling and water exploration tubular column of multi-section fracturing horizontal well and working method thereof Download PDFInfo
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- CN104100234A CN104100234A CN201310114069.2A CN201310114069A CN104100234A CN 104100234 A CN104100234 A CN 104100234A CN 201310114069 A CN201310114069 A CN 201310114069A CN 104100234 A CN104100234 A CN 104100234A
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Abstract
The invention discloses a sectional synchronous sampling and water exploration tubular column of a multi-section fracturing horizontal well and a working method thereof, and the tubular column is designed for realizing synchronous fast sampling and water exploration for all intervals of the horizontal well through one trip of the tubular column. The tubular column is arranged between a screwed plug and an oil well pump, and is connected with multiple stages of connecting units consisting of underground sampling switchgears and packers through oil pipes, and the underground sampling switchgear and the packer of each stage correspond to one interval respectively. The upper end of the underground sampling switchgear at the top stage is connected with the oil well pump through an oil pipe, the upper end of the oil well pump is connected with a sucker rod arranged in the oil pipe, the oil pipe is connected to a wellhead, and the sucker rod is connected with a ground pumping unit. The tubular column adopts the multi-stage underground sampling switchgears, so that sectional synchronous sampling and water exploration for multiple intervals through one trip of the tubular column can be realized, the original manner that production and water exploration for each interval are separated is converted into the manner of synchronous production and water exploration, the water exploration period can be significantly shortened, the water discharge interval can be determined, the water exploration efficiency is improved, and a reliable basis can be provided for water control and oil production enhancement measures for the horizontal well.
Description
Technical field
The present invention relates to a kind of multistage pressure break horizontal well in segments and sample searching pipe column and method of work thereof simultaneously, belong to oil extraction in oil field technical field.
Background technology
At present, domestic each elephant take that to improve reservoir development degree, improve recovery ratio, improve well yield and reduce cost of winning be core, carries forward vigorously horizontal wells technology.Because well track and the flooding pattern of horizontal well are complicated and changeable, each oil reservoir lithology, physical property are different with properties of fluid in bearing stratum, water absorbing capacity, water-front advance velocity and the production fluid situation etc. of each interval be there are differences, cause indivedual interval water breakthroughs early, water bearing bed position and direction are indefinite, and each layer of production capacity and pressure condition are unclear.At present, horizontal well water detection technology is also immature, and particularly the water detection technology of the low liquid measure horizontal well of low-permeability oil deposit, also in the exploratory development stage, causes on-the-spot dynamically adjustment measure without specific aim, to have a strong impact on horizontal well development effect.Existing sectionalized water-exploration testing pipe column of casing well-completion horizontal well adopts intelligent switch device to carry out timing controlled to each interval, produce one by one each interval, moisture by each section of ground assay, judgement water exit interval, all to independently produce 10 days for every section, the water detection cycle is oversize, has a strong impact on produced on-site progress, is not suitable with the water detection demand of many bunches of long horizontal sections horizontal wells of segmentation.
Summary of the invention
The object of the present invention is to provide a kind of multistage pressure break horizontal well in segments to sample searching pipe column and method of work thereof, it can realize that each interval segmentation of one-trip string horizontal well samples simultaneously and water detection fast simultaneously, for the water-control oil-increasing measure of horizontal well provides reliable basis.
Concrete technology contents of the present invention is as follows:
Multistage pressure break horizontal well in segments samples searching pipe column simultaneously:
This tubing string, between plug and oil well pump, connects the multistage linkage unit forming with well sampling derailing switch and packer by oil pipe, each corresponding interval of the well sampling derailing switch of every grade and packer.The most top well sampling derailing switch upper end connects oil well pump by oil pipe, and the connection of oil well pump upper end is located at the sucker rod in oil pipe, and oil pipe is connected to well head, and sucker rod connects ground oil pumper.
Multistage pressure break horizontal well in segments samples the method for work of searching pipe column simultaneously:
First, by design scheme, on ground, take number of days as chronomere sets well sampling derailing switches at different levels close the acquisition time of sampling simultaneously, then water detection kit is connected according to the catenation principle of " segmentation samples searching pipe column " simultaneously.Then, by tubing string, down to precalculated position, packers at different levels are opened each interval sealed clamping cleat, and ground oil pumper is produced continuously.In early stage pit shaft, after the emptying of operation fluid, well sampling derailing switches at different levels regularly cut out, and carry out each interval fluid and produce simultaneously and reach stable state, and then segmentation samples simultaneously.After having sampled, upper lift pipe string, collects each layer fluid in well sampling derailing switches at different levels.By assay, obtain each section of moisture data, accurately judge water exit interval.
The present invention compared with the prior art tool has the following advantages:
This tubing string adopts multi-level downhole sampling switch device, the segmentation that can realize one-trip string multi-section multi-layer samples water detection test simultaneously, by each original interval one by one production water detection change into simultaneously and to produce sampling water detection, can significantly shorten water detection test period, define water exit interval, improve water detection testing efficiency high, for the water-control oil-increasing measure of horizontal well provides reliable foundation.
Accompanying drawing explanation
Fig. 1 is that multistage pressure break horizontal well in segments samples searching pipe column schematic diagram simultaneously.
The specific embodiment
Embodiment:
With reference to Fig. 1, embodiments of the invention are further illustrated:
The pressure break horizontal well of five pay intervals of take samples searching pipe column as example simultaneously:
Plug 1 upper end of this tubing string connects I level well sampling derailing switch 3 by oil pipe 2, I level well sampling derailing switch 3 upper ends connect I level packer 4 by oil pipe 2, I level packer 4 upper ends connect II level well sampling derailing switch 5 by oil pipe 2, II level well sampling derailing switch 5 upper ends connect II level packer 6 by oil pipe 2, II level packer 6 upper ends connect III level well sampling derailing switch 7 by oil pipe 2, III level well sampling derailing switch 7 upper ends connect III level packer 8 by oil pipe 2, III level packer 8 upper ends connect IV level well sampling derailing switch 9 by oil pipe 2, IV level well sampling derailing switch 9 connects IV level packer 10 by oil pipe 2, IV level packer 10 upper ends connect V level well sampling derailing switch 11 by oil pipe 2, V level well sampling derailing switch 11 upper ends connect the oil well pump 12 of gap bridge or rod-type by oil pipe 2, oil well pump 12 upper end connected pipes 2 and be located at the sucker rod 13 in oil pipe 2, oil pipe 2 is connected to well head, sucker rod 13 connects ground oil pumper 14.Altogether corresponding five intervals of the well sampling derailing switch of this tubing string Pyatyi and packer.
In the time of this tubing string, sample groundwater prospecting method as follows:
First, by design scheme, on ground, take number of days as chronomere sets well sampling derailing switches at different levels close the acquisition time of sampling simultaneously, then water detection kit is connected according to the catenation principle of " segmentation samples searching pipe column " simultaneously.Then, by tubing string, down to precalculated position, packers at different levels are opened each interval sealed clamping cleat, and ground oil pumper is produced continuously.In early stage pit shaft, after the emptying of operation fluid, well sampling derailing switches at different levels regularly cut out, and carry out each interval fluid and produce simultaneously and reach stable state, and then segmentation samples simultaneously.After having sampled, upper lift pipe string, collects each layer fluid in well sampling derailing switches at different levels.By assay, obtain each section of moisture data, accurately judge water exit interval.
The flatly experimental data of 5 sections of level of production wells of take is example, adopts prior art tubing string, and early stage, discharge opeing was 10 days, and each interval independently is produced 10 days, 5 sections 50 days, altogether need to 60 days.And discharge opeing in the technique of this tubing string early stage 10 days, each interval is produced segmentation after 6 days simultaneously again and is sampled simultaneously, amounts to and needs 16 days.
Claims (4)
1. multistage pressure break horizontal well in segments samples a searching pipe column simultaneously, it is characterized in that:
Between plug (1) and oil well pump (12), by oil pipe (2), connect the multistage linkage unit forming with well sampling derailing switch and packer, each corresponding interval of the well sampling derailing switch of every grade and packer; The most top well sampling derailing switch upper end connects oil well pump (12) by oil pipe (2), oil well pump (12) upper end connects the sucker rod (13) being located in oil pipe (2), oil pipe (2) is connected to well head, and sucker rod (13) connects ground oil pumper (14).
2. multistage pressure break horizontal well in segments according to claim 1 samples searching pipe column simultaneously, it is characterized in that:
The plug of this tubing string (1) upper end connects I level well sampling derailing switch (3) by oil pipe (2), I level well sampling derailing switch (3) upper end connects I level packer (4) by oil pipe (2), I level packer (4) upper end connects II level well sampling derailing switch (5) by oil pipe (2), II level well sampling derailing switch (5) upper end connects II level packer (6) by oil pipe (2), II level packer (6) upper end connects III level well sampling derailing switch (7) by oil pipe (2), III level well sampling derailing switch (7) upper end connects III level packer (8) by oil pipe (2), III level packer (8) upper end connects IV level well sampling derailing switch (9) by oil pipe (2), IV level well sampling derailing switch (9) connects IV level packer (10) by oil pipe (2), IV level packer (10) upper end connects V level well sampling derailing switch (11) by oil pipe (2), V level well sampling derailing switch (11) upper end connects the oil well pump (12) of gap bridge or rod-type by oil pipe (2), oil well pump (12) upper end connected pipes (2) and be located at the sucker rod (13) in oil pipe (2), oil pipe (2) is connected to well head, sucker rod (13) connects ground oil pumper (14),
The oil well pump of this tubing string (12) and sucker rod (13) are positioned at down-hole vertical section, the plug of this tubing string (1) is positioned at down-hole horizontal section to V level well sampling derailing switch (11), altogether corresponding five intervals of the Pyatyi well sampling derailing switch of this tubing string and packer.
3. multistage pressure break horizontal well in segments samples a method of work for searching pipe column simultaneously, it is characterized in that:
First, by design scheme, on ground, take number of days as chronomere sets well sampling derailing switches at different levels close the acquisition time of sampling simultaneously, then water detection kit is connected according to the catenation principle of " segmentation samples searching pipe column " simultaneously; Then, by tubing string, down to precalculated position, packers at different levels are opened each interval sealed clamping cleat, and ground oil pumper is produced continuously; In early stage pit shaft, after the emptying of operation fluid, well sampling derailing switches at different levels regularly cut out, and carry out each interval fluid and produce simultaneously and reach stable state, and then segmentation samples simultaneously.After having sampled, upper lift pipe string, collects each layer fluid in well sampling derailing switches at different levels; By assay, obtain each section of moisture data, accurately judge water exit interval.
4. multistage pressure break horizontal well in segments samples the method for work of searching pipe column simultaneously according to claim 3, it is characterized in that 5 sections of level of production wells carry out technique discharge opeing in early stage 10 days, and each interval is regenerated to produce simultaneously and within 6 days, reached stable state, and then segmentation samples simultaneously.
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| CN105178947A (en) * | 2015-09-18 | 2015-12-23 | 中国石油天然气股份有限公司 | Water locating-plugging integration method for horizontal well |
| CN114059958A (en) * | 2021-12-02 | 2022-02-18 | 西南石油大学 | Method for determining performance parameters of non-directional intelligent plugging system of sewing network system |
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| CN114059958B (en) * | 2021-12-02 | 2023-05-23 | 西南石油大学 | Method for determining performance parameters of non-directional intelligent plugging system of suture net system |
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