CN104989319A - Cementing method based on continuous cementing mode in petroleum exploration - Google Patents
Cementing method based on continuous cementing mode in petroleum exploration Download PDFInfo
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- CN104989319A CN104989319A CN201510273572.1A CN201510273572A CN104989319A CN 104989319 A CN104989319 A CN 104989319A CN 201510273572 A CN201510273572 A CN 201510273572A CN 104989319 A CN104989319 A CN 104989319A
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Abstract
The invention discloses a cementing method based on a continuous cementing mode in petroleum exploration. The cementing method is characterized by comprising steps of installing a flexible plug and a replacing opening plug in a cement head, and implementing first grade cementing operation through a grading hoop after circulation; pressing the flexible plug, and quantitatively replacing slurry, wherein replaced slurry capacity is less than the capacity from a grading hoop body to a replacing pipe at a bump pressure seat by 0 to 2m2; pressing the replacing opening plug, continuing to replacing slurry until the replacing opening plug opens a plug seat to a lower sliding sleeve of the grading hoop, and pressuring to open a circulating hole of the grading hoop; implementing second grade cementing operation through the grading hoop; pressing a closing plug, replacing the slurry, and bumping; and stopping a pump to release pressure from a well head. The cementing method based on the continuous cementing mode in petroleum exploration is high in safety, and stable in the whole well sealing performance.
Description
Technical field
The present invention relates to exploration activity construction field, particularly, relate in a kind of oil exploration the cementing method adopting continuous cementing mode.
Background technology
current, most of oil field shallow-layer is explored exploitation, in order to obtain more oil gas energy storage and exploitation production capacity, can only dispose the exploration and development of middle-deep well, deep-well and ultradeep well.In middle-deep well, deep-well and ultradeep well, due to oil-gas Layer between the upper and lower every large, gas and formation water to reasons such as casing corrosions, need to the real-time sealing technique of full well.In order to satisfied well cementation needs, the development plan of Oilfield Company all requires must use fraclional well cementing technique for the Oil/gas Well vertically more than 2500 meters.
In well cementing operation, can use and need to adopt sizing collar, sizing collar is also called stage cementing device or bipolar hoop.Existing well cementation mode is a lot, how to realize the safety of full well sealing, stability is very important.
Summary of the invention
Technical problem to be solved by this invention is to provide in a kind of oil exploration the cementing method adopting continuous cementing mode, and not only safety is high for it, and the sealing stability of full well is high.
The present invention's adopted technical scheme that solves the problem is:
Adopt a cementing method for continuous cementing mode in oil exploration, it is characterized in that, comprise the following steps:
A) flexibility plug and replacement type being opened plug is contained in cementing head, utilizes sizing collar to carry out first order cementing job after circulation is good;
B) the flexible plug of pressure, quantitatively for mud, is less than sizing collar body to impacting seat place for pipe internal volume 0-2m for slurry amount
2;
C) bear down on one and open plug for type, continue for mud, until replacement type opens obturating plug on sizing collar low sleeve, pressurization, opens sizing collar circulation port;
D) sizing collar is utilized to carry out second level cementing job;
E) shut-off plug is pressed, for mud, bruising;
F) termination of pumping, from well head release pressure.
As preferably, in step e, the pressure of exerting pressure should be more than or equal to the closing presure of sizing collar.
As preferably, when first order cementing job and second level cementing job, often a mud filled by lower 10 sleeve pipes.
As preferably, when first order cementing job and second level cementing job, upper and lower 4 sleeve pipes of sizing collar add elastic centralizer continuously.
Further, in steps A and step e, after complete under sleeve pipe, connect cementing head and well cementation pipeline, the ascending circulation of discharge capacity.
As preferably, in stepb, be less than sizing collar body to impacting seat place for pipe internal volume 1m for slurry amount
2.
To sum up, the invention has the beneficial effects as follows:
1, the requirement of well cementation mode of the present invention to technique is low, and method is simple, and safety is high.
2, adopt well cementation mode of the present invention, it is high to the sealing stability of full well.
Detailed description of the invention
Below in conjunction with embodiment, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1:
Adopt a cementing method for continuous cementing mode in oil exploration, it is characterized in that, comprise the following steps:
A, flexibility plug and replacement type are opened plug be contained in cementing head, after circulation is good, utilize sizing collar to carry out first order cementing job;
The flexible plug of b, pressure, quantitatively for mud, is less than sizing collar body to impacting seat place for pipe internal volume 0-2m for slurry amount
2;
C, bear down on one and open plug for type, continue for mud, until replacement type opens obturating plug on sizing collar low sleeve, pressurization, opens sizing collar circulation port;
D, sizing collar is utilized to carry out second level cementing job;
E, pressure shut-off plug, for mud, bruising;
F, termination of pumping, from well head release pressure.
This cementing method adopts fraclional well cementing mode, and the requirement of whole cementing method to technique is low, and method is simple, and safety is high, and it is high to the sealing stability of full well.
Embodiment 2:
The present embodiment cementing method on the basis of above-described embodiment is optimized, and namely in step e, the pressure of exerting pressure should be more than or equal to the closing presure of sizing collar.
When first order cementing job and second level cementing job, often a mud filled by lower 10 sleeve pipes.
When first order cementing job and second level cementing job, upper and lower 4 sleeve pipes of sizing collar add elastic centralizer continuously.
In steps A and step e, after complete under sleeve pipe, connect cementing head and well cementation pipeline, the ascending circulation of discharge capacity.
In stepb, sizing collar body is less than to impacting seat place for pipe internal volume 1m for slurry amount
2.
As mentioned above, the present invention can be realized preferably.
Claims (6)
1. adopt a cementing method for continuous cementing mode in oil exploration, it is characterized in that, comprise the following steps:
Flexibility plug and replacement type are opened plug to be contained in cementing head, utilizes sizing collar to carry out first order cementing job after circulation is good;
The flexible plug of pressure, quantitatively for mud, is less than sizing collar body to impacting seat place for pipe internal volume 0-2m for slurry amount
2;
Bear down on one and open plug for type, continue for mud, until replacement type opens obturating plug on sizing collar low sleeve, pressurization, opens sizing collar circulation port;
Sizing collar is utilized to carry out second level cementing job;
Pressure shut-off plug, for mud, bruising;
Termination of pumping, from well head release pressure.
2. adopt the cementing method of continuous cementing mode in a kind of oil exploration according to claim 1, it is characterized in that: in step e, the pressure of exerting pressure should be more than or equal to the closing presure of sizing collar.
3. adopt the cementing method of continuous cementing mode in a kind of oil exploration according to claim 1, it is characterized in that: when first order cementing job and second level cementing job, often a mud filled by lower 10 sleeve pipes.
4. adopt the cementing method of continuous cementing mode in a kind of oil exploration according to claim 1, it is characterized in that: when first order cementing job and second level cementing job, upper and lower 4 sleeve pipes of sizing collar add elastic centralizer continuously.
5. adopt the cementing method of continuous cementing mode in a kind of oil exploration according to claim 3 or 4, it is characterized in that: in steps A and step e, after complete under sleeve pipe, connect cementing head and well cementation pipeline, the ascending circulation of discharge capacity.
6. adopt the cementing method of continuous cementing mode in a kind of oil exploration according to claim 1, it is characterized in that: in stepb, be less than sizing collar body to impacting seat place for pipe internal volume 1m for slurry amount
2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510273572.1A CN104989319A (en) | 2015-05-26 | 2015-05-26 | Cementing method based on continuous cementing mode in petroleum exploration |
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| CN201510273572.1A CN104989319A (en) | 2015-05-26 | 2015-05-26 | Cementing method based on continuous cementing mode in petroleum exploration |
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| CN104989319A true CN104989319A (en) | 2015-10-21 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545247A (en) * | 2015-12-08 | 2016-05-04 | 中国石油天然气股份有限公司 | Well cementing method for oil and gas well |
| CN109281637A (en) * | 2018-10-17 | 2019-01-29 | 中石化石油工程技术服务有限公司 | A kind of cementing method suitable for leakiness ultradeep well |
| CN110566186A (en) * | 2019-09-24 | 2019-12-13 | 中国石油集团渤海钻探工程有限公司 | Method for measuring open blockage encountering and blocking position in two-stage well cementation operation |
| CN114109297A (en) * | 2020-08-25 | 2022-03-01 | 中国石油化工股份有限公司 | Stage cementing method |
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Cited By (6)
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| CN105545247A (en) * | 2015-12-08 | 2016-05-04 | 中国石油天然气股份有限公司 | Well cementing method for oil and gas well |
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| CN109281637A (en) * | 2018-10-17 | 2019-01-29 | 中石化石油工程技术服务有限公司 | A kind of cementing method suitable for leakiness ultradeep well |
| CN110566186A (en) * | 2019-09-24 | 2019-12-13 | 中国石油集团渤海钻探工程有限公司 | Method for measuring open blockage encountering and blocking position in two-stage well cementation operation |
| CN114109297A (en) * | 2020-08-25 | 2022-03-01 | 中国石油化工股份有限公司 | Stage cementing method |
| CN114109297B (en) * | 2020-08-25 | 2024-05-14 | 中国石油化工股份有限公司 | Stage cementing method |
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Application publication date: 20151021 |