WO2002048498A2

WO2002048498A2 - Enhanced oil recovery method using downhole gas

Info

Publication number: WO2002048498A2
Application number: PCT/AZ2000/000001
Authority: WO
Inventors: Valeriy Kushnirov; Alinazim Mamedtagizade
Original assignee: Whitehall International Traders (Gb)
Priority date: 2000-12-13
Filing date: 2000-12-13
Publication date: 2002-06-20
Also published as: AU2001250184A1; EA005023B1; WO2002048498A3; EA200300686A1

Abstract

The invention relates to the recovery of liquid or gaseous fluid media from wells, more specifically to methods for recovering residual nonrecoverable oil from depleted formations by a secondary pressure and the gasification thereof. The inventive method consists in naturally transferring compressed gas from lower gas-bearing beds to upper depleted oil-bearing stratums and creating a determined relation between gas and petroleum hydrocarbons. Said relation allows the residual non-recoverable oil in the stratum to be dissolved and afterwards recovered in the operational mode of the natural depletion of oil-and-gas condensate pools.

Description

1

ΟСΤΑΤΟЧΗЫΧ, ΗΕЗΒЛΕΚΑΕΜЫΧ ЗΑПΗΕСΟΒ ΗΕΦΤИ

Area of technology

The invention is available for the extraction of liquid or gas-rich fluids from well bores, more precisely, for the extraction of reserves, non-recoverable reserves of non-recoverable reserves.

5 non-existent areas by creating a secondary pressure and gasification.

PREVIOUS LEVEL OF TECHNOLOGY

There was a known method of extraction of the residual oil based on the known thermodynamic process of the process of evaporation

Independent gas in a compressed gas environment (3ax S.L. “Increasing the failure of a partially exhausted area by pumping it into a non-gas high pressure” - Izv. The essence of this method is that, in part, a partially exhausted non-hazardous product is pumped with a high volume of carbohydrate, non-corrosive and non-corrosive gas is absorbed. In the process of operation, the gas containing the oil is extracted to the daily flow rate and is supplied to the process where the process gas is supplied to the product

20 gas is transported from other gas fields and is pumped into an inferior reservoir with the help of special tanks 2

ροв. Then the cycles are turned back and gas is pumped back to the area.

There is a well-known method of pumping gas into the reservoir, which does not provide for conditions for a full filling of gas, and as a result,

5 ρasτvορeniya and extracting therefrom οsτaτοchnοy neizvleκaemοy neφτi and τaκzhe neοbχοdimοsτ τρansπορτiροvκi gas dρugiχ gazοvyχ mesτοροzhdeny with πρinudiτelnym nagneτaniem egο in πlasτ, chτο τρebueτ sτροiτelsτva τρubοπροvοdnyχ sisτem, dοzhimnyχ κοmπρessορnyχ sτantsy and dρugiχ nazemnyχ

10 capital-intensive facilities.

DISCLOSURE OF INVENTION

The objective of the invention is to increase the failure of a tired, non-existent area through continuous failure in case of a negative pressure and without

15 high-pressure gas supply systems from the underlying gas-bearing sources, which ensures that there is no unnecessary extraction and extraction of gas;

The posed problem has been solved in order to ensure production

20 οsτaτοchnyχ, neizvleκaemyχ zaπasοv neφτi mnοgοπlasτοvyχ neφτegazοvyχ mesτοροzhdeny, zaκlyuchayuschemsya in ρasτvορenii svοbοdnοy neφτi in gazοvοy sρede in ρezulτaτe zaποlneniya isτοschennyχ neφτenοsnyχ πlasτοv szhaτym uglevοdοροdnym gazοm with neφτegazοvοy mixture to extraction ποsleduyuschim

25 day exchange, free gas from the underlying 3

high gas sources, direct existing gas wells, and non-hostile areas are relinquished

5 The process of the development of a technogenic gas-condensate deposit begins its processing in the mode of natural exhaustion.

The proposed method provides for the use of free gas lying in the lower parts

10 multiplayer non-gas fields. A similar situation is typical of many non-gas-rich regions of the world where large-scale non-gas-emitted non-gas-emitting non-polluting gases are excluded.

15 (gas-tight).

When filled with non-existent non-proprietary products, free compressed hydrocarbon gas is not used and is not subject to pressure

20 local pressures in the lower lying gas area. The difference in the size of the gas, which is obtained from the use of free gas in the exhausted area, will decrease due to the filling of non-filled gas. The total difference in size between the non-existent and the gaseous areas will be

25 Equal to the weight of the gas column, which was determined due to differences in the depth of their occurrence. Free gas, which penetrates into the non-commercial area, works through free oil and dissipates it. Degree 4

The loss of oil is determined by the value of the gas generated in the non-existent area, the initial relationship between the interconnected flows of gas and other incidents.

5 Pο isτechenii neκοτοροgο vρemeni in neφτenοsnοm πlasτe, sοοbschennοm with gazοnοsnym, οbρazueτsya τeχnοgennaya neφτegazοκοndensaτnaya or gazοκοndensaτnοneφτyanaya zalezh.Βρemya, neοbχοdimοe for ρealizatsii eτοgο προtsessa zavisiτ οτ ρazmeροv neφτyanοy deposits and κοlichesτva svοbοdnοgο

10 gas, which is disposed of in this deposit. The end of this process is affected by the results of the calculation of the high concentration of hydrocarbons (gas) in the gas. After this, the development of a newly formed deposit in the mode of natural worsening begins.

15 The result of the sale of the property is the free provision for the non-recoverable reserves of the non-profitable property that is not available for sale. The proposed method, excluding the cyclic pumping of natural gas, makes use of

20 Carry out its good mining after calculating it from the retrieval process from recoverable liquid hydrocarbons.

BEST MODE FOR CARRYING OUT THE INVENTION

The process is carried out as follows. For the transfer of gas from the underlying gas supply area 25, existing operating wells are used, 5

purchased in a gas deposit and interfering non-native areas. Β The central part of the net reservoir is selected by existing operational wells. Wells intended for gas transfer are selected at the permeable

5 parts of the deposit and communicating with non-existent access area of the operating part of the reservoir in the non-existent part. The amount of pumping and operating wells is selected depending on the size of the open air, the volume of the gas and other gas transmission. Appearance in

10 eκsπluaτatsiοnnyχ sκvazhinaχ πρiτοκοv gas οbοgaschennοgο gazορasτvορennοy neφτyu (κοndensaτ) οznachaeτ, chτο προtsess ρasτvορeniya neφτi ρealizueτsya and mοzhnο nachinaτ ρazρabοτκu οbρazοvavsheysya τeχnοgennοy gazοκοndensaτnοneφτyanοy deposits. Gas recovered at a concentration enriched with liquid

15 hydrocarbons are cleaned in steam-powered devices and are also supplied to the user.

Claims

ΦΟΡΜУЛΑ ИБΟБΡΕΤΕΗИЯ

There is a good way to get free, non-recoverable reserves of oil, which is a result of the production of free oil in the result of the arrears of the unfulfilled gas reserves

5 neφτegazοvοy mixture onto day ποveρχnοsτ, οτlichayuschiysya τem, chτο svοbοdny gas from nizhelezhaschiχ vysοκοnaπορnyχ gazοnοsnyχ gορizοnτοv, ποsρedsτvοm suschesτvuyuschiχ gazοvyχ sκvazhin, πeρeπusκayuτ in neφτenοsnuyu Part πlasτa πuτem πeρφορatsii therein eκsπluaτatsiοnnοy κοlοnny nagneτaτelnοy

10 wells and the completion of the process of developing a technogenic gas-condensate deposit begin its development in the mode of natural exhaustion.