CN205714181U - Formation contaminant quantitative evaluation device in a kind of drilling process - Google Patents
Formation contaminant quantitative evaluation device in a kind of drilling process Download PDFInfo
- Publication number
- CN205714181U CN205714181U CN201620352184.2U CN201620352184U CN205714181U CN 205714181 U CN205714181 U CN 205714181U CN 201620352184 U CN201620352184 U CN 201620352184U CN 205714181 U CN205714181 U CN 205714181U
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- China
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- drilling fluid
- gas
- holding unit
- drilling
- evaluation device
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
This utility model relates to formation contaminant quantitative evaluation device in a kind of drilling process, is mainly made up of gas cylinder, valve, gas pipeline, Pressure gauge, drilling fluid reservoir, core holding unit, effusion meter, withdrawer.Gas in gas cylinder enters drilling fluid reservoir through barometer on gas pipeline, then arrives core holding unit, is connected to barometer and effusion meter and connects with another gas cylinder after core holding unit, and drilling fluid reservoir bottom is equipped with tube for transfusion and valve.This utility model can disposably complete the drilling fluid quantitative assessment to the pollution on stratum, it is simple to reservoir protection, and construction parameter optimization designs, and to improving, Oil & Gas Productivity is significant.
Description
Technical field
This utility model relates to oil drilling technology field, particularly relates to formation contaminant quantitative assessment in a kind of drilling process
Device.
Background technology
Owing to well-control equipment is more expensive, operate the reasons such as more complicated, if stratum is the most complicated, the most do not use balance to bore
Well, seldom uses underbalanced drilling, the most always makes drilling fluid column pressure be more than strata pressure 1.0～2.0Mpa, so pressure reduction is
Objective reality, be also unavoidable to oil, the infringement of gas-bearing formation.The pressure of drilling fluid is more than formation fluid pressure, causes drilling fluid
Under the effect of permeable pressure head, drive away connate fluid in borehole wall surrounding formation hole (oil, gas and water) and invaded formation, with this
Meanwhile, the solid particle in drilling fluid is deposited in the borehole wall and forms mud cake.The intrusion of drilling fluid, changes borehole wall surrounding rock
Electrically and fluid properties, thus stratum is caused a certain degree of pollution.Pressure reduction is the biggest, and mud filtrate invasion oil, gas-bearing formation are the deepest, dirty
Contaminating the most serious, the extent of damage is the biggest.Up-to-date experimental studies results shows, the intrusion of drilling fluid mainly with displacement, mix with diffusion 3
Plant dynamic process to carry out.In order to release the drilling fluid injury to oil-gas Layer as far as possible, before Oil/gas Well is gone into operation, acid typically can be used
The breaking block treatment such as change, to recover or to improve Oil & Gas Productivity.Make the effect that these breaking block treatment obtain, it is necessary to accurately
Know that drilling fluid invades people's degree of depth and extent of injury.It is thus desirable to formation contaminant quantitative evaluation device in a kind of drilling process, in order to
Quantitative assessment formation contaminant degree, in order to preferably construction parameter and development plan, improves oil gas well capacity.
Summary of the invention
This utility model is solved the technical problem that to be to provide formation contaminant quantitative evaluation device in a kind of drilling process,
So that quantitative assessment formation contaminant degree, it is simple to reservoir protection, construction parameter optimization designs, and improves oil gas well capacity.
This utility model be the technical scheme is that
Formation contaminant quantitative evaluation device in a kind of drilling process, mainly by gas cylinder, valve, gas pipeline, pressure
Table, drilling fluid reservoir, core holding unit, effusion meter, withdrawer form.Wherein: the gas in gas cylinder is at gas pipeline
On through barometer enter drilling fluid reservoir, drilling fluid reservoir now does not hold drilling fluid, gas further to
Core holding unit also invades original rock core, and the voltage stabilizing of core holding unit is provided by another gas cylinder, and residual gas is through appendix
Road enters barometer and effusion meter, calculates the permeability of original rock core according to correlation formula, continues in drilling fluid reservoir
Put into drilling fluid, after utilizing gases at high pressure to make mud filtrate invasion rock core, drilling fluid is released, continue observation barometer and flow
The registration of meter, calculates rock core according to correlation formula and is drilled into the permeability after also invading, according to rock core by mud filtrate invasion
Permeability difference front and back, combined mathematical module quantitative scoring can calculate the pollution condition on stratum in drilling process.
The beneficial effects of the utility model are can disposably to complete the drilling fluid quantitative assessment to the pollution on stratum, it is simple to storage
Layer protection, construction parameter optimization designs, and to improving, Oil & Gas Productivity is significant.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model.
In Fig. 1: 1,11 gas cylinder, 2,6 valves, 3,12,13, gas pipeline, 4,9 Pressure gauges, 5, drilling fluid reservoir,
7, withdrawer, 8, core holding unit, 10, effusion meter.
Detailed description of the invention
Below in conjunction with the accompanying drawings this utility model is described further.
In this utility model one drilling process as shown in Figure 1, formation contaminant quantitative evaluation device is by 1,11 high pressure gas
Bottle, 2,6 valves, 3,12,13 gas pipelines, 4,9 Pressure gauges, 5, drilling fluid reservoir, 7, withdrawer, 8, core holding unit, 10,
Effusion meter is constituted.The rock core taken out from shaft bottom is put into core holding unit 8, needed for gas cylinder 11 provides core holding unit 8
Voltage stabilizing, opens valve 2, and gas enters drilling fluid reservoir 5 and core holding unit 8 through gas pipeline 3, read Pressure gauge 4,9 with
And the registration of effusion meter 10, calculate the original permeability of formation core according to correlation formula and known parameters, afterwards, by drilling well
Liquid is poured in drilling fluid reservoir 5, is again turned on valve 2, is clamped through rock core by drilling fluid with gases at high pressure simulated formation pressure
Device 8 is pressed in rock core, opens valve 6 by the remaining liq in drilling fluid reservoir 5 in withdrawer 7 put into by pipeline, now, and rock
The heart, by mud filtrate invasion, is again turned on valve 2, reads barometer 4,9 and the reading of effusion meter 10, according to correlation formula and
Know that parameter calculates rock core by the permeability after mud filtrate invasion, according to the original permeability of rock core and by mud filtrate invasion it
After permeability difference, can the pollution level on preferable quantitative response stratum, beneficially reservoir protection, construction parameter optimization sets
Meter, improves Oil & Gas Productivity.
Claims (3)
1. a formation contaminant quantitative evaluation device in drilling process, mainly by gas cylinder (1,11), valve (2,6), gas transmission
Pipeline (3,12,13), Pressure gauge (4,9), drilling fluid reservoir (5), withdrawer (7), core holding unit (8), effusion meter (10)
Composition, it is characterised in that: equipped with barometer (4) and access on the gas pipeline (3) of gas process in described gas cylinder (1)
Drilling fluid reservoir (5), drilling fluid reservoir (5) is connected with core holding unit (8), it is provided that the gas cylinder (11) of voltage stabilizing and rock
Heart clamp holder (8) connects, and enters barometer (9) and effusion meter (10) by the residual gas of rock core through gas pipeline (13), bores
Well liquid reservoir (5) is connected with withdrawer (7), and surplus drilling fluid is released by valve (6).
Formation contaminant quantitative evaluation device in a kind of drilling process the most according to claim 1, is characterized in that: drilling fluid stores up
Storage (5) connects with core holding unit (8).
Formation contaminant quantitative evaluation device in a kind of drilling process the most according to claim 1, is characterized in that: drilling fluid stores up
Liquid in storage (5) can be discharged through valve (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620352184.2U CN205714181U (en) | 2016-04-25 | 2016-04-25 | Formation contaminant quantitative evaluation device in a kind of drilling process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620352184.2U CN205714181U (en) | 2016-04-25 | 2016-04-25 | Formation contaminant quantitative evaluation device in a kind of drilling process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205714181U true CN205714181U (en) | 2016-11-23 |
Family
ID=57296554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620352184.2U Expired - Fee Related CN205714181U (en) | 2016-04-25 | 2016-04-25 | Formation contaminant quantitative evaluation device in a kind of drilling process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205714181U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111175208A (en) * | 2019-12-24 | 2020-05-19 | 中国地质大学（北京） | Drilling fluid mud cake permeability evaluation device and method |
-
2016
- 2016-04-25 CN CN201620352184.2U patent/CN205714181U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111175208A (en) * | 2019-12-24 | 2020-05-19 | 中国地质大学（北京） | Drilling fluid mud cake permeability evaluation device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161123 Termination date: 20170425 |