CN109630063A - Method for tripping partition of gel solid slug - Google Patents
Method for tripping partition of gel solid slug Download PDFInfo
- Publication number
- CN109630063A CN109630063A CN201811286593.7A CN201811286593A CN109630063A CN 109630063 A CN109630063 A CN 109630063A CN 201811286593 A CN201811286593 A CN 201811286593A CN 109630063 A CN109630063 A CN 109630063A
- Authority
- CN
- China
- Prior art keywords
- gel
- slug
- drilling
- pressure
- well
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000007787 solid Substances 0.000 title claims abstract description 22
- 238000005192 partition Methods 0.000 title claims abstract description 6
- 238000005553 drilling Methods 0.000 claims abstract description 22
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 6
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 12
- 238000007711 solidification Methods 0.000 claims description 8
- 230000008023 solidification Effects 0.000 claims description 8
- 230000001960 triggered effect Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 abstract description 9
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052717 sulfur Inorganic materials 0.000 abstract description 3
- 239000011593 sulfur Substances 0.000 abstract description 3
- 238000005086 pumping Methods 0.000 abstract 1
- 230000001502 supplementing effect Effects 0.000 abstract 1
- 238000012856 packing Methods 0.000 description 6
- 239000003292 glue Substances 0.000 description 4
- 229920002472 Starch Polymers 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 238000009955 starching Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
- E21B33/134—Bridging plugs
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a method for tripping a gel solid slug partition, which relates to the field of drilling operation of sulfur-containing oil and gas wells and comprises the following steps: the first step is as follows: taking out the drill under pressure to the designed well depth, pumping the gel with the designed amount, and taking out the drill to the upper part of the gel slug; the second step is that: circulating for n hours, and triggering gel curing through the formation temperature; the third step: after the gel is solidified, verifying whether the underground pressure is completely cut off, and if the underground pressure is completely cut off, tripping the well in a conventional open-hole mode; the fourth step: when drilling down, opening the well and drilling down to the top of the gel solid slug, drilling the gel solid slug, then supplementing pressure and drilling down to the bottom of the well under pressure, and recovering drilling. The method can realize the well control safety in the fine pressure control tripping process, ensure that the drilling fluid is not leaked basically in the whole tripping process and effectively protect the oil gas reservoir.
Description
Technical field
The present invention relates to sulfur crude gas well drillng operation fields, specifically relate to a kind of close for the narrow safety of sulfur-bearing formation
The method that drilling well makes a trip after degree bed.
Background technique
Fine controlled pressure drilling tripping method is generally pulled out of hole using slurry cap method again, that is, is designed and starched cap density and height again,
With pressure is drilled into design position and open well after nut cap and pull out of hole for starching again, gets into bottom under stages cycle when lower brill.But it is passed through in practice
Nearly zero ' Safe Density Windows of Chang Yinwei or negative window can only starch again the trip-out of cap method, lower drilling using grouting quantity method cage is checked
Ensure well control safety with counter push away of light sizing, causes a large amount of drilling fluid leakages, pollution reservoir.
Publication No. 103711452A, publication date are that the Chinese patent literature on April 9th, 2014 discloses a kind of gel section
Plug packing well control method, it the following steps are included: S1, when there is spill and leakage with complicated pit shaft situation is deposited, established in pit shaft solidifying
Glue slug；S2, circulating with choke exhaust is carried out to the top pit shaft after packing；S3, the safety work time provided in pit shaft packing
It is interior, it carries out stopping boring leak stopping preparation；S4, by gel slug break glue release pit shaft packing after, blocked up using extrusion
Leak operation；S5, throttle well killing is carried out with weighted drilling fluid.The advantageous effect of the invention is: by gel slug pit shaft packing and
Broken glue releases pit shaft packing, provides a kind of completely new selection to handle complicated pit shaft situation；Gel slug blocks oil gas to move up
Overflow is effectively controlled in shaft bottom, provides the safety work time for leak stopping kill-job, reduce well control safety risk by channel；
With novel technical thought, reliable technical solution, practical engineering technology is advantageously formed.
But it using above patent document as the prior art of representative, is not ensured that during fine pressure control makes a trip
Well control safety, operates imprecision, and the process that entirely makes a trip still can miss drilling fluid, oil and gas reservoir is caused to be contaminated.
Summary of the invention
The present invention is directed to for defect and deficiency present in the above-mentioned prior art, providing one kind can be achieved fine pressure control
Well control safety in going down process guarantees that the entire process that makes a trip will not miss drilling fluid substantially, and effective protection oil and gas reservoir coagulates
The method that glue solid slug compartment makes a trip.
The present invention is realized by using following technical proposals:
A kind of method that gel solids slug compartment makes a trip, it is characterised in that steps are as follows:
Step 1: with pressure is drilled into planned well depth, it is pumped into design flow gel, rises and is drilled into gel slug top；
Step 2: circulation n hours, gel solidification is triggered by formation temperature；
Step 3: whether verifying down-hole pressure separates completely after gel solidification, if partition completely, spacious well usual manner makes a trip；
Step 4: after spacious underground is drilled at the top of gel solids slug, brill opens gel solids slug, then ftercompction and band when lower brill
Pressure is drilled into shaft bottom, restores drilling.
In the first step, rises and be drilled into gel slug top 0.1-100m.
In the second step, n=0.1-999 hours.
Compared with prior art, the beneficial effects obtained by the present invention are as follows it is as follows:
By above-mentioned process flow, fine pressure control not will cause the severe leakage of drilling fluid during making a trip, and both protect storage
Layer, has been greatly reduced the well control risk to make a trip.Effectively separate down-hole pressure system, it can be achieved that essence by gel solids slug
Well control safety during thin pressure control makes a trip；The process that entirely makes a trip will not miss drilling fluid substantially, effectively protect oil gas
Reservoir.
Detailed description of the invention
Below in conjunction with specification drawings and specific embodiments, the present invention is described in further detail, in which:
Fig. 1 is principle schematic diagram of the present invention.
Marked in the figure:
1, drilling fluid, 2, gel slug, 3, oil-gas Layer, 4, lower brill surge pressure gradient, 5, trip-out swabbing pressure gradient, 6, stratum
Barometric gradient.
Specific embodiment
Embodiment 1
As a better embodiment of the invention, it discloses a kind of method that gel solids slug compartment makes a trip, steps
It is as follows:
Step 1: with pressure is drilled into planned well depth, it is pumped into design flow gel, rises and is drilled into gel slug top；
Step 2: circulation n hours, gel solidification is triggered by formation temperature；
Step 3: whether verifying down-hole pressure separates completely after gel solidification, if partition completely, spacious well usual manner makes a trip；
Step 4: after spacious underground is drilled at the top of gel solids slug, brill opens gel solids slug, then ftercompction and band when lower brill
Pressure is drilled into shaft bottom, restores drilling.
Embodiment 2
As preferred forms of the invention, specific work process of the invention:
Step 1: with pressure is drilled into planned well depth, it is pumped into design flow gel, rises and is drilled into gel slug top 0.1-100m；
Step 2: n hours (n=0.1-999) of circulation, triggers gel solidification by formation temperature；
Step 3: whether verifying down-hole pressure separates completely after gel solidification, if partition completely, spacious well usual manner makes a trip；
Step 4: after spacious underground is drilled at the top of gel solids slug, brill opens gel solids slug, then ftercompction and band when lower brill
Pressure is drilled into shaft bottom, restores drilling.
Before the trip-out of spacious well, temperature control triggering after design position in gel injection well is frozen into slug, separates down-hole pressure
System prevents from altering in overflow, then opens well and pulls out of hole；When lower brill, when solid slug is got into conventional spacious underground, brill opens solid slug,
Then band pressure is bored；This solves the broken glued temperature resistances of deeply limited under casing valve, gel valve, and difficult, drain spray is hung with when depositing
Tank starches that the drilling fluid that cap makes a trip largely is missed and Holes of Complicated Wells makes a trip well control risk problem again.
Claims (3)
1. a kind of method that gel solids slug compartment makes a trip, it is characterised in that steps are as follows:
Step 1: with pressure is drilled into planned well depth, it is pumped into design flow gel, rises and is drilled into gel slug top；
Step 2: circulation n hours, gel solidification is triggered by formation temperature；
Step 3: whether verifying down-hole pressure separates completely after gel solidification, if partition completely, spacious well usual manner makes a trip；
Step 4: after spacious underground is drilled at the top of gel solids slug, brill opens gel solids slug, then ftercompction and band when lower brill
Pressure is drilled into shaft bottom, restores drilling.
2. the method that a kind of gel solids slug compartment according to claim 1 makes a trip, it is characterised in that: described first
In step, rises and be drilled into gel slug top 0.1-100m.
3. the method that a kind of gel solids slug compartment according to claim 1 makes a trip, it is characterised in that: described second
In step, n=0.1-999 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811286593.7A CN109630063A (en) | 2018-10-31 | 2018-10-31 | Method for tripping partition of gel solid slug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811286593.7A CN109630063A (en) | 2018-10-31 | 2018-10-31 | Method for tripping partition of gel solid slug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109630063A true CN109630063A (en) | 2019-04-16 |
Family
ID=66067033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811286593.7A Pending CN109630063A (en) | 2018-10-31 | 2018-10-31 | Method for tripping partition of gel solid slug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109630063A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115653536A (en) * | 2022-09-30 | 2023-01-31 | 中国石油天然气集团有限公司 | Circulating pressure control method and system for liquid rubber plug packing production zone in drilling process |
| CN117888842A (en) * | 2024-03-18 | 2024-04-16 | 中国石油大学(华东) | Ultra-deep wellbore pressure control method and system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5291949A (en) * | 1991-05-07 | 1994-03-08 | Union Oil Company Of California | Method for inhibiting caustic flood breakthrough |
| CN103711452A (en) * | 2013-12-31 | 2014-04-09 | 西南石油大学 | Gel plug packing well control method |
| CN105464645A (en) * | 2016-01-11 | 2016-04-06 | 西南石油大学 | Well-completion wellbore simulation experimental device and method suitable for deep well high-temperature fluid slug |
| CN106703743A (en) * | 2015-11-18 | 2017-05-24 | 中国石油天然气股份有限公司 | Gel isolation well control method |
-
2018
- 2018-10-31 CN CN201811286593.7A patent/CN109630063A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5291949A (en) * | 1991-05-07 | 1994-03-08 | Union Oil Company Of California | Method for inhibiting caustic flood breakthrough |
| CN103711452A (en) * | 2013-12-31 | 2014-04-09 | 西南石油大学 | Gel plug packing well control method |
| CN106703743A (en) * | 2015-11-18 | 2017-05-24 | 中国石油天然气股份有限公司 | Gel isolation well control method |
| CN105464645A (en) * | 2016-01-11 | 2016-04-06 | 西南石油大学 | Well-completion wellbore simulation experimental device and method suitable for deep well high-temperature fluid slug |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115653536A (en) * | 2022-09-30 | 2023-01-31 | 中国石油天然气集团有限公司 | Circulating pressure control method and system for liquid rubber plug packing production zone in drilling process |
| CN115653536B (en) * | 2022-09-30 | 2024-06-07 | 中国石油天然气集团有限公司 | Circulating pressure control method and system for liquid rubber plug packing production layer in drilling process |
| CN117888842A (en) * | 2024-03-18 | 2024-04-16 | 中国石油大学(华东) | Ultra-deep wellbore pressure control method and system |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190416 |