CN102434144A - Oil extraction method for u-shaped well for oil field - Google Patents

Abstract

The invention relates to the technical field of oil extraction of heavy oil wells, in particular to an oil extraction method of a u-shaped well for an oil field. The method comprises the following steps: the steam injection device is arranged at one wellhead of the u-shaped well, oil extraction steam is continuously injected into a pipe column in the well, downhole crude oil is carried out by hot steam, a mixture of the crude oil, liquid and gas flows out from the other wellhead, the mixture flows out of the ground and then enters the oil-gas receiving device, the crude oil is separated from the mixture by the oil-gas separation device arranged at the other wellhead, and the separated steam enters the steam injection device. The invention realizes continuous oil extraction, improves daily oil extraction of the oil well, saves cost and prolongs the service life of the oil well. The defect that the oil extraction pipe column and the oil well casing are abraded due to frequent tripping of the oil extraction pipe column in the existing oil extraction mode of the heavy oil well is overcome.

Description

A kind of oil field is with " u " shape well oil production method

Technical field:

The present invention relates to a kind of heavy oil wells oil recovery technique field, particularly a kind of oil field is with " u " shape well oil production method.

Background technology:

Heavy oil wells oil recovery at present is to recover the oil through the cycle steam soak mostly; Promptly be lowered to heat-proof string earlier, soften viscous crude, reduce viscosity of thickened oil to the stratum steam in jection again, then trip out heat-proof string; Being lowered to flow string recovers the oil through the flow string that the machine of kowtowing drives the down-hole; This oil production method is that be interrupted, discontinuous, and working procedure is loaded down with trivial details, has a large amount of water vapour resources to be bled off; And periodicity, intermittent steam in jection make oil well casing periodically expand with heat and contract with cold, and have seriously shortened the application life of oil well.And shake out owing to the down-hole in the process of recovering the oil or owing to other down-hole reasons such as flow strings, need the frequent flow string that removes, cause the wearing and tearing of flow string, oil well casing, increase cost for oil production, prolong the construction period, the oil recovery phase.

Summary of the invention:

The technical problem that the present invention will solve provides a kind of oil field with " u " shape well oil production method, and this method has realized continuous oil recovery, improves oil well day oil production, practices thrift cost, prolongs oil well application life.Overcome existing heavy oil wells oil production method discontinuity and recovered the oil, frequently removed flow string, caused the deficiency of flow string, oil well casing wearing and tearing.

The technical scheme that the present invention taked is: a kind of oil field is with " u " shape well oil production method; This method step is following: a well head place at " u " shape well is provided with the steam in jection device; In well, inject oil recovery steam continuously in the tubing string; Take down-hole crude oil out of with vapours, the mixture of crude oil, liquid, gas flows out from another well head, flows out the oily vapour receiving system of entering behind the ground; Oily steum separating device through being arranged on another well head place is separated crude oil from mixture, the steam of separating gets into the steam in jection device again.

The steam in jection device comprises steam heater and gas pressurized device.

The invention has the beneficial effects as follows: the present invention is provided with oily steum separating device is separated crude oil from mixture mode owing to having adopted at a well head place of " u " shape well; Thereby has a function of continuous oil recovery; Improve oil well day oil production, practice thrift cost; Can protect oil well casing, prolong oil well application life.

Description of drawings:

Below in conjunction with the accompanying drawing and the specific embodiment the present invention is done further detailed explanation.

Accompanying drawing is a sketch map of the present invention.

The specific embodiment:

As shown in Figure 1; A kind of oil field is with " u " shape well oil production method; This method step is following: a well head place at " u " shape well is provided with the steam in jection device, in well, injects oil recovery steam continuously in the tubing string, takes down-hole crude oil out of with vapours; The mixture of crude oil, liquid, gas flows out from another well head; Get into oily vapour receivingsystem 4 after flowing out ground, oily steum separating device through being arranged on another wellhead place 5 is separated crude oil from mixture, and the steam of separating gets into the steam in jection device again.Wherein the steam in jection device comprisessteam heater 2 and gas pressurized device 3.

It is understandable that; More than about specific descriptions of the present invention; Only be used to the present invention is described and be not to be subject to the described technical scheme of the embodiment of the invention; Those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the present invention, to reach identical technique effect; As long as satisfy the use needs, all within protection scope of the present invention.

Claims (2)

1. an oil field is with " u " shape well oil production method; It is characterized in that: this method step is following: a well head place at " u " shape well is provided with the steam in jection device; In well, inject oil recovery steam continuously in the tubing string; Take down-hole crude oil out of with vapours, the mixture of crude oil, liquid, gas flows out from another well head, flows out entering oily vapour receiving system (4) behind the ground; Oily steum separating device (5) through being arranged on another well head place is separated crude oil from mixture, the steam of separating gets into the steam in jection device again.

2. use " u " shape well oil production method according to the described oil field of claim 1, it is characterized in that: said steam in jection device comprises steam heater (2) and gas pressurized device (3).

Images