CN105950125A - Internal secondary temporary plugging agent for thick oil layers - Google Patents
Internal secondary temporary plugging agent for thick oil layers Download PDFInfo
- Publication number
- CN105950125A CN105950125A CN201610350589.7A CN201610350589A CN105950125A CN 105950125 A CN105950125 A CN 105950125A CN 201610350589 A CN201610350589 A CN 201610350589A CN 105950125 A CN105950125 A CN 105950125A
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- Prior art keywords
- temporary plugging
- oil
- plugging agent
- parts
- diverting agent
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/502—Oil-based compositions
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/04—Hulls, shells or bark containing well drilling or treatment fluids
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Sealing Material Composition (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention discloses an internal temporary plugging agent for thick oil layers. By the aid of the internal temporary plugging agent, problems of large particle sizes, low compressive strength and incapability of plugging the insides of oil layers via casing blast holes of water-soluble temporary plugging agents for oil fields can be solved. The internal temporary plugging agent particularly comprises, by weight, 32-35 parts of asphalt, 40-43 parts of terpene resin, 9-12 parts of rosin, 9-12 parts of walnut shell powder and 5-7 parts of barite powder. The internal temporary plugging agent has the advantages that the oil-soluble internal temporary plugging agent has small particle sizes, is excellent in adhesion stress and high in compressive strength and can be adhered with rock under the effect of external force, pressures are easy to turn after crack is plugged, accordingly, new crack can be opened by means of pressure, and the permeability of the oil gas layers can be improved.
Description
Technical field
The present invention relates to a kind of petroleum production engineering diverting agent.
Background technology
Block up pressure break i.e. Conventional selective fracturing technology the most temporarily, belong to selection pressure break between interval, temporary by putting into water solublity
Blocking agent is high by permeability, imbibition ability strong, start borehole corresponding to the High water cut position that pressure is low temporarily blocks, and forces fracturing fluid
Shunting, thus press off new crack at other interval, reach the purpose of sleective fracturing hyposmosis interval, and for permeability contrast
Less compound rhythm oil reservoir, because conventional water soluble diverting agent cannot be entered in layer, in centering height water logging section implementation level, closure, reaches
Less than purpose of taping the latent power.
Secondary is the most stifled fracturing technology in blocking up pressure break i.e. layer temporarily, selects pressure break in belonging to layer, uses diverting agent by borehole pair
In layer, Thief zone position is blocked up temporarily, so that cracking initiation hyposmosis position in layer, high oil-gas bearing area new in linking up layer
Territory, improves oil well capacity.
At present, the diverting agent that oil field uses is mainly water solublity diverting agent, and it is mainly composed of osseocolla, sulfonated gilsonite, guanidine
Glue and polymer, its closure mechanism is expanded after mainly being absorbed water by diverting agent and reaches to block purpose, owing to its particle diameter is relatively big,
Comprcssive strength is less, it is impossible to inside sleeve pipe embrasure plugging oil reservoir, is unsatisfactory for using requirement.
Summary of the invention
It is an object of the invention to provide diverting agent in a kind of thick oil pay, this diverting agent is oil-soluble, and particle diameter is little, has good
Cohesive force, can bond with rock under the effect of external force, comprcssive strength is relatively big, behind closure crack, it is easy to make pressure turn to pressure
Open new crack, thus improve oil-gas Layer permeability.
For achieving the above object, secondary diverting agent in the thick oil pay of the present invention, its component is according to weight/mass percentage composition
Calculate respectively:
Colophonium: 32-35,
Terpene resin: 40-43,
Colophonium: 9-12,
Walnut shell powder: 9-12,
Blanc fixe: 5-7.
Preferably its constituent content is:
Colophonium: 33,
Terpene resin: 42,
Colophonium: 10,
Walnut shell powder: 10,
Blanc fixe: 5.
The preparation method of diverting agent of the present invention:
1. reactor is warming up to 140 DEG C；
2. after question response still temperature reaches 140 DEG C, according to formula, it is firstly added terpene resin, after all melting to it, starts and stir
Mix, add Colophonium, after Colophonium all melts, add Colophonium；
3. while dissolving step 2. middle material, weigh blanc fixe and walnut shell powder, and the two is mixed；
4. after until step, 2. middle material all melts, by the mixed-powder vacuum sucting reaction still of step 3. middle preparation；
5. material mix homogeneously in question response still, is discharged in the cooling bay equipped with 40-50 DEG C of cooling water cool down；
6. material in cooling bay is pulverized.
Beneficial effect:
1, use diverting agent of the present invention, at the scene in test, first implement conventional interlayer sleective fracturing, block high permeability zone
Section, transforms hyposmosis interval, selects pressure break, the Thief zone position in closure hyposmosis interval the most again, transform low in implementation level
Infiltration position, once closure pressure refers to the closure pressure between interval, and secondary plugging pressure refers to closure pressure break in layer, works as secondary plugging
Pressure improves more than 2MPa compared with once blocking pressure, and industry is thought to make and is seamed into merit.Site test results is secondary plugging
Pressure significantly improves 4MPa compared with once blocking pressure, shows that secondary blocks up successfully temporarily, and in layer, hyposmosis position is successfully made
Seam；
2, the most stifled Fracturing Technology in determining layer, uses oil-soluble temporary plugging agent to be combined rhythm oil by borehole selective shut-off
Layer medium to high permeable position, reaches to transform the purpose at hyposmosis position in hyposmosis interval.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is further detailed:
Embodiment 1
One, prepared by diverting agent
According to preparation method preparation diverting agent described in Summary, joined diverting agent component and content (WT%) are as follows:
Colophonium: 33,
Terpene resin: 42,
Colophonium: 10,
Walnut shell powder: 10,
Blanc fixe: 5.
Two, performance detection
1, closure pressure and comprcssive strength inspection
(1), the preparation of artificial core: precoated sand and water are loaded in fill out sand tube, 45 DEG C of perseverances according to the volume ratio mixing of 10:1
Temperature 48h, artificial core crack diameter is about 0.5-1.0cm；
(2), diverting agent addition is when being 2.5g, and breakthrough pressure reaches 18.5MPa, then adds that 3.0g diverting agent is stifled temporarily to be broken through
Behind crack, diverting agent breakthrough pressure again reaches 28.3MPa, compares Article 1 seam fracture pressure and improves 9.8 MPa；
(3), the addition of diverting agent is when being 5.0g, and diverting agent comprcssive strength reaches 42.3 MPa.
2, oil solution ratio measures
(1) with balance weigh 3 parts of diverting agents be respectively placed in the beaker equipped with 20ml crude oil and 10% crude oil (crude content 20ml),
In the round-bottomed flask of 5% crude oil (crude content 20ml)；
(2) respectively by beaker and 10% crude oil (crude content 20ml), the round bottom of 5% crude oil (crude content 20ml) of 20ml crude oil
Flask is respectively placed in the water-bath of 45 DEG C, and rotating speed is adjusted to 2r/s；
(3) every 1h, filter paper filtering, analysis is used to do, weigh, and record data；
(4) after 7h, calculate diverting agent dissolution rate in each solvent, and calculate meansigma methods；
(5) diverting agent dissolution rate in 20ml crude oil is 88.6%, and the dissolution rate in 10% crude oil is 82.7%, at 5% crude oil
In dissolution rate be 80.1%；
(6) knowable to experimental data, diverting agent dissolution rate in 100% crude oil, 10% crude oil, 3 kinds of solvents of 5% crude oil all reaches
More than 80%, drive a well after pressure and get final product de-plugging, meet on-the-spot actual requirement.
3, thermal stability determination
(1) choose the size of diverting agent at about 1cm, be positioned in surface plate, then will be equipped with the surface plate of diverting agent
It is positioned in the calorstat of 45 DEG C, takes out surface plate after 1h, observe diverting agent heat stability；
(2) diverting agent does not deform in 1 hour, in a disguised form at 45 DEG C, meets field requirement.
4, on-site measurement
Use diverting agent prepared by above-mentioned formula, test 3 mouthfuls of wells at BLOCK OF LAMADIAN OIL FIELD scene.Reservoir plugging inner pressure resistant intensity
Require: diverting agent comprcssive strength should be greater than oil reservoir fracture pressure, and (BLOCK OF LAMADIAN OIL FIELD oil reservoir fracture pressure is the most all at 15-40MPa
Between).Conventional water soluble diverting agent and diverting agent comparing result in the oil-soluble layer of the present invention:
After measure, average individual well increases oil 7.7t/d, and aqueous decline 7.7 percentage points, compared with Conventional selective pressure break, individual well is many
Increase oil 3.5t/d, aqueous many declines 9.9 percentage points.
Embodiment 2
According to following component and content (WT%) preparation diverting agent:
Colophonium: 32,
Terpene resin: 42,
Colophonium: 9,
Walnut shell powder: 11,
Blanc fixe: 6.
Comprcssive strength: 43MPa；Particle diameter: 2～3mm.
Embodiment 3
According to following component and content (WT%) preparation diverting agent:
Colophonium: 34,
Terpene resin: 40,
Colophonium: 11,
Walnut shell powder: 9,
Blanc fixe: 5.
Comprcssive strength: 41MPa；Particle diameter: 2～3mm.
Claims (2)
1. a secondary diverting agent in thick oil pay, according to weight/mass percentage composition calculate, its component respectively:
Colophonium: 32-35,
Terpene resin: 40-43,
Colophonium: 9-12,
Walnut shell powder: 9-12,
Blanc fixe: 5-7.
Secondary diverting agent in thick oil pay the most according to claim 1, it is characterised in that: its constituent content is:
Colophonium: 33,
Terpene resin: 42,
Colophonium: 10,
Walnut shell powder: 10,
Blanc fixe: 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610350589.7A CN105950125B (en) | 2016-05-25 | 2016-05-25 | Secondary diverting agent in a kind of thick oil pay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610350589.7A CN105950125B (en) | 2016-05-25 | 2016-05-25 | Secondary diverting agent in a kind of thick oil pay |
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| Publication Number | Publication Date |
|---|---|
| CN105950125A true CN105950125A (en) | 2016-09-21 |
| CN105950125B CN105950125B (en) | 2019-10-01 |
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| CN201610350589.7A Active CN105950125B (en) | 2016-05-25 | 2016-05-25 | Secondary diverting agent in a kind of thick oil pay |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107828394A (en) * | 2017-11-23 | 2018-03-23 | 长江大学 | A kind of diverting agent and preparation method thereof |
| CN108300437A (en) * | 2017-12-20 | 2018-07-20 | 中国石油天然气股份有限公司 | A kind of oil-soluble mounting medium and preparation method thereof for bottom water reservoir pressure break |
| CN111793485A (en) * | 2020-08-13 | 2020-10-20 | 陕西安诺瑞特石油科技有限公司 | Water plugging agent and preparation method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1690161A (en) * | 2004-04-29 | 2005-11-02 | 中国石油化工股份有限公司 | Follow-drilling plugging agent and its preparation method and use |
| CN101348711A (en) * | 2008-07-01 | 2009-01-21 | 中国海洋石油总公司 | Drill-feeding plugging agent and preparation thereof |
| CN103146362A (en) * | 2013-04-09 | 2013-06-12 | 石家庄华莱鼎盛科技有限公司 | Broad spectrum type high-efficient blocking agent for drilling fluid |
| CN104232037A (en) * | 2014-08-27 | 2014-12-24 | 克拉玛依市金鑫科技有限公司 | Crack plugging agent for oil-base drilling fluids |
-
2016
- 2016-05-25 CN CN201610350589.7A patent/CN105950125B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1690161A (en) * | 2004-04-29 | 2005-11-02 | 中国石油化工股份有限公司 | Follow-drilling plugging agent and its preparation method and use |
| CN101348711A (en) * | 2008-07-01 | 2009-01-21 | 中国海洋石油总公司 | Drill-feeding plugging agent and preparation thereof |
| CN103146362A (en) * | 2013-04-09 | 2013-06-12 | 石家庄华莱鼎盛科技有限公司 | Broad spectrum type high-efficient blocking agent for drilling fluid |
| CN104232037A (en) * | 2014-08-27 | 2014-12-24 | 克拉玛依市金鑫科技有限公司 | Crack plugging agent for oil-base drilling fluids |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107828394A (en) * | 2017-11-23 | 2018-03-23 | 长江大学 | A kind of diverting agent and preparation method thereof |
| CN108300437A (en) * | 2017-12-20 | 2018-07-20 | 中国石油天然气股份有限公司 | A kind of oil-soluble mounting medium and preparation method thereof for bottom water reservoir pressure break |
| CN111793485A (en) * | 2020-08-13 | 2020-10-20 | 陕西安诺瑞特石油科技有限公司 | Water plugging agent and preparation method and application thereof |
| CN111793485B (en) * | 2020-08-13 | 2022-12-23 | 陕西安诺瑞特石油科技有限公司 | Water shutoff agent and preparation method and application thereof |
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| Publication number | Publication date |
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| CN105950125B (en) | 2019-10-01 |
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