CN104141480B - A kind of pressure break slug adds sand process - Google Patents
A kind of pressure break slug adds sand process Download PDFInfo
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- CN104141480B CN104141480B CN201310523172.2A CN201310523172A CN104141480B CN 104141480 B CN104141480 B CN 104141480B CN 201310523172 A CN201310523172 A CN 201310523172A CN 104141480 B CN104141480 B CN 104141480B
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Abstract
The present invention relates to a kind of pressure break slugs to add sand process, belongs to petroleum exploration and development fracturing engineering technical field.The present invention each slug of shale gas pressing crack construction add the sand period plus the later stage in sand stage increase sand proportion, form a high sand ratio stage, this stage sand is than the sand with next plus sand period than identical.Enter pressure change behind stratum than section by observing this high-stage sand, instruct subsequent construction, complete pressing crack construction task.
Description
Technical field：
The present invention relates to a kind of pressure break slugs to add sand process, belongs to petroleum exploration and development fracturing engineering technical field.
Background technology：
In the construction of petroleum exploration and development shale gas fracturing sand feeding, sand technique is usually added using slug formula, i.e. pumping is certain
After prepad fluid, add the sand period for a slug by one plus sand stage and an insulating liquid stage closely followed, multicycle alternating is extremely
It constructs the later stage, starts continuously plus sand to construction terminates.Each period sand is than keeping a fixed value, and the latter period is compared with the last week
Phase sand than high, this sand injection manner because latter period sand than suddenly improve, be easy to cause the period sand enter stratum after draw
The abnormal raising of construction pump pressure is played, causes plus sand stops or causes construction sand plug that construction is caused to fail in advance.
Invention content：
Present invention aim to address pressure anomalies during shale gas slug sand fracturing to increase, and causes plus sand construction carries
The defects of preceding termination or failure, provides a kind of pressure break for slowing down Fracturing Pressure and rising extremely, improving fracturing sand feeding coincidence rate
Slug adds sand process.
The technical solution of this process is as follows：
The present invention includes the following steps：
1st, it is pumped into prepad fluid according to design；
2nd, it is pumped into first slug and adds the sand period.Start to add sand according to design sand ratio, sand stage liquid is added within this period
The preceding 80-90% of amount, sand when adding sand liquid measure later stage 10-20%, carry high sand ratio, the sand ratio after raising than keeping a definite value
Value is identical with the sand ratio in the second slug period of design, after being pumped into the period 1 and adding sand liquid measure, stops sand, and the is pumped by design
One slug adds the isolation liquid measure in the sand period, completes the first slug and the sand period is added to construct.
3rd, it is pumped into second slug and adds the sand period.Start to add sand according to design sand ratio, sand stage liquid is added within this period
The preceding 80-90% of amount, sand when the sand liquid measure later stage is added to remain 20-10%, carry high sand ratio, the sand after raising than keeping a definite value
The sand ratio in third slug period of the ratio with designing is identical, after being pumped into second round and adding sand liquid measure, stops sand, is pumped by design
Second slug adds the isolation liquid measure in the sand period, completes the second slug and the sand period is added to construct.
4th, above-mentioned 2,3 are repeated and is pumped into program, be sequentially completed the follow-up each section of slug of this well and add the sand period.
5th, it completes to be pumped into after each slug adds the sand period, according to design requirement, completes continuously plus sand pump enters program, and replaced
Into entire pressing crack construction task.
The present invention adds the sand stage in each slug of shale gas pressing crack construction adds the sand period, and the sand later stage is being added to increase
Sand ratio, forms a high sand ratio stage, this stage sand than the sand with next plus sand period than identical, by observing this high sand ratio
Stage enters pressure changing behind stratum, if pressure, without apparent fluctuation, pressing crack construction can be normally carried out；On if pressure is apparent
Rise fluctuation, it can be determined that current formation is unfavorable for follow-up high sand ratio and sand is added to construct, there are sand plug risk, but because of this increased height
Sand is fewer than stage liquid measure, the time is short, and when causing pressure oscillation, insulating liquid has been basically completed replacement in pit shaft, will not cause to add
Sand construction, which terminates or constructs in advance, to fail.
Specific embodiment：
The present invention is further described in detail with reference to embodiment.
Certain a bite shale gas well fracturing sand feeding program is as follows：
In above-mentioned plus sand program, each slug adds the sand period to add the sand stage last 10-20% of liquid measure, increases a height
Sand than the stage, this stage sand than the sand with next plus sand period than identical, after entering stratum by observing this high sand ratio stage
Pressure changing, if pressure, without apparent fluctuation, pressing crack construction can be normally carried out；If pressure significantly rises fluctuation, can sentence
Disconnected current formation is unfavorable for follow-up high sand ratio and sand is added to construct, and there are sand plug risks, can reduce the sand ratio in follow-up each period, continue
Into construction.
Claims (1)
1. a kind of pressure break slug adds sand process, which is characterized in that adds the later stage in sand period in each slug, increases a height
Sand is than the stage, this stage sand with next slug than adding the sand in sand period to include the following steps than identical：
（1）Prepad fluid is pumped into according to design；
（2）It is pumped into first slug and adds the sand period；Start to add sand according to the first design sand ratio, sand stage liquid is added within this period
The preceding 80-90% of amount, sand is than keeping a definite value, i.e., the first design sand ratio；When the sand liquid measure later stage is added to remain 20-10%, sand is improved
Than the sand ratio after raising adds the sand ratio in sand period identical with the second slug designed, and the second slug adds the sand ratio in sand period
Value i.e. the second design sand ratio, after being pumped into the period 1 and adding sand liquid measure, stops sand, being pumped into the first slug by design added in the sand period
Liquid measure is isolated, completes the first slug and the sand period is added to construct；
（3）It is pumped into second slug and adds the sand period；Start to add sand according to the second design sand ratio, sand stage liquid is added within this period
The preceding 80-90% of amount, sand is than keeping a definite value, i.e., the second design sand ratio；When the sand liquid measure later stage is added to remain 20-10%, sand is improved
Than the sand ratio after raising adds the sand ratio in sand period identical with the third slug designed, and third slug adds the sand ratio in sand period
Value is third design sand ratio, after being pumped into second round and adding sand liquid measure, stops sand, and being pumped into the second slug by design added in the sand period
Liquid measure is isolated, completes the second slug and the sand period is added to construct；
（4）According to above-mentioned（2）、（3）It is pumped into program successively backward to analogize, adds sand period and subsequent each slug in third slug
The sand period is added to add the sand stage last 10-20% of liquid measure, increases the high sand ratio stage described in one, the sand in the high sand ratio stage
Than adding the design sand in sand period with next slug, than identical, being sequentially completed this well, subsequently each section of slug adds the sand period；
（5）Completion is pumped into after each slug adds the sand period, according to design requirement, completes continuously plus sand pump enters program, and replace completion
Entire pressing crack construction task.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310523172.2A CN104141480B (en) | 2013-10-29 | 2013-10-29 | A kind of pressure break slug adds sand process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310523172.2A CN104141480B (en) | 2013-10-29 | 2013-10-29 | A kind of pressure break slug adds sand process |
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| CN104141480A CN104141480A (en) | 2014-11-12 |
| CN104141480B true CN104141480B (en) | 2018-07-06 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106761644A (en) * | 2016-12-27 | 2017-05-31 | 中国石油化工股份有限公司江汉油田分公司石油工程技术研究院 | The processing method that control pressure rises extremely in a kind of shale fracturing process |
| CN106593394B (en) * | 2017-01-23 | 2019-03-05 | 重庆矿产资源开发有限公司 | A kind of shale gas pressure break ladder sand adding method |
| CN107023285A (en) * | 2017-05-16 | 2017-08-08 | 华美孚泰油气增产技术服务有限责任公司 | A kind of shale gas reservoir hydraulic fracturing adds sand technique |
| CN108222910A (en) * | 2018-01-22 | 2018-06-29 | 成都西油联合石油天然气工程技术有限公司 | A kind of fixed displacement slug formula fracturing technology |
| CN112240191B (en) * | 2019-07-19 | 2022-11-29 | 中国石油化工股份有限公司 | Shale gas fracturing sand adding method |
| CN111335862A (en) * | 2020-04-26 | 2020-06-26 | 中国石油天然气集团有限公司 | Variable viscosity sand fracturing method |
| CN114592842A (en) * | 2020-12-04 | 2022-06-07 | 中国石油天然气股份有限公司 | Continental facies shale oil reservoir fracturing sand adding method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6863128B2 (en) * | 2001-10-24 | 2005-03-08 | Schlumberger Technology Corporation | Method of predicting friction pressure drop of proppant-laden slurries using surface pressure data |
| CN102562022A (en) * | 2012-03-02 | 2012-07-11 | 陕西延长石油(集团)有限责任公司研究院 | Process technology suitable for deep coal bed gas fracturing |
| CN103244094A (en) * | 2013-05-16 | 2013-08-14 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Carbonate rock multi-slug injection type fracturing method |
| CN103306661A (en) * | 2012-11-29 | 2013-09-18 | 中国石油化工股份有限公司 | Method for controlling fracturing of multiple fractures of oil and gas field with natural micro-fracture-developed reservoir stratum |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2652489C (en) * | 2008-02-04 | 2014-06-03 | Sanjel Corporation | Low residue fluid fracturing system and method of use |
-
2013
- 2013-10-29 CN CN201310523172.2A patent/CN104141480B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6863128B2 (en) * | 2001-10-24 | 2005-03-08 | Schlumberger Technology Corporation | Method of predicting friction pressure drop of proppant-laden slurries using surface pressure data |
| CN102562022A (en) * | 2012-03-02 | 2012-07-11 | 陕西延长石油(集团)有限责任公司研究院 | Process technology suitable for deep coal bed gas fracturing |
| CN103306661A (en) * | 2012-11-29 | 2013-09-18 | 中国石油化工股份有限公司 | Method for controlling fracturing of multiple fractures of oil and gas field with natural micro-fracture-developed reservoir stratum |
| CN103244094A (en) * | 2013-05-16 | 2013-08-14 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Carbonate rock multi-slug injection type fracturing method |
Non-Patent Citations (1)
| Title |
|---|
| 《页岩油气水平井压裂裂缝复杂性指数研究及应用展望》;蒋廷学;《石油钻探技术》;20130331;第41卷(第2期);第11页图4 * |
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