CN100398779C - Hot air filling balance oil recovery technique 'zhanqian' mountain oil reservoir - Google Patents
Hot air filling balance oil recovery technique 'zhanqian' mountain oil reservoir Download PDFInfo
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- CN100398779C CN100398779C CNB2006100463954A CN200610046395A CN100398779C CN 100398779 C CN100398779 C CN 100398779C CN B2006100463954 A CNB2006100463954 A CN B2006100463954A CN 200610046395 A CN200610046395 A CN 200610046395A CN 100398779 C CN100398779 C CN 100398779C
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Abstract
The present invention relates to a hot air filling balance oil extracting technology of old burial hill oil reservoirs, which belongs to the technical class of driving oil by firing an oil layer in an oil field. At present, certain effect can be obtained by using the method of firing oil drive in carbonatite burial hills, structural oil reservoirs and thin oil reservoirs, and a higher extracting ratio can be obtained by improving the extracting ratio of the burial hill oil reservoirs, however, the water content ratio of some burial hill oil reservoirs which exists bottom water reaches 95 percent after extraction so as to lose extracting value and have no effect by using fire flooding. Therefore, the present invention utilizes the method of injecting high-temperature air which is less than 350 DEG C towards the air top position in an old oil well of an old burial hill, so that after an oil-water interface which rises because the extraction of crude oil in the well moves for a distance downwards, the crude oil in the well is extracted by using the method of gas drive. The method can enhance the extracting ratio by more than 15 percent, and moreover, when in construction, old oil can be used for work and does not need to drill a new well, which is economical and practical; because simple construction and the saving of oil well resource, the process technology can widely dig thick oil and thin oil reservoirs and the residual reserves of old oil fields.
Description
Technical field:
The present invention relates to a kind of buried hill oil reservoir injection air oil production method, belong to oil field combustion in situ technology of reservoir sweep class.
Background technology:
The general oil production of buried hill oil pool is very high in the oilfield development process, owing to influenced by lithologic character controlling, be present in the fine and close crack and cracked hole such as the crude oil in the structural oil pool of block buried hill, rely on the end water energy drives oil reservoir of bottom, buried hill during exploitation, but owing to rising along with end water, output can constantly descend, for improving recovery ratio, the bottom water filling makes end water upwards push away oily way to buried hill in employing at present, recovery ratio is improved, but this water flooding regime is when the end is waterborne when being raised to the buried hill tip position, the interior moisture content of well can reach more than 95%, promptly can't exploit crude oil in the oil well, make to be present in that remaining oil becomes the region of bypassed oil in the buried hill, a kind of for this reason buried hill oil reservoir injection air oil production method can be exploited the remaining oil of this type of buried hill oil reservoir, make recovery ratio improve 20%, this method domestic and foreign literature by retrieval is not reported.
Summary of the invention:
Purpose of the present invention is in order to overcome above-mentioned shortcoming, and a kind of buried hill oil reservoir injection air oil production method that provides can reach 95% oil well that does not have the value of recovering the oil to the buried hill oil pool moisture content that adopts waterflooding extraction and recover the oil, makes recovery ratio to improve 15% again on former basis.
Technical solution of the present invention:
Be the task of realizing that the present invention proposes, this method comprises the steps to finish:
One, at first buried hill oil storage rerum natura is selected:
The buried hill lithology is shallow particle rock matter migmatite, granulite matter kataclastics, biotite or the shallow particle rock matter kataclastics in the carbonate quartzite, there is diaclase in buried hill in the grandson crack, the micropore dual media is arranged in the crack, and the oil reservoir shape is block buried hill, has end water to exist in the bottom, buried hill.
Two, well location is selected and is determined:
Select the buried hill oil reservoir to utilize OW in the existing oil field to carry out water filling gas injection and oil recovery and needn't bore new well, the former perforated interval of reply OW carries out shutoff before the construction, and according to construction requirement dead chick hole again, its moisture content of the selected OW of construction well is more than 95%.
Three, the oil well that is determined is included the well section and injects 350 ℃ of hot airs, force to move down certain distance new produce oil water termination position to the gas injection early stage in the buried hill in because of the oil-water interfaces that rise waterborne at the bottom of the crude oil extraction, promptly balance at the interface till.
Four, the buried hill oil reservoir is exploited:
After above-mentioned steps is finished, utilize after the gas injection reservoir section on the new produce oil water termination to recover the oil again, as new produce oil water termination occurs and move down situation, can come oil-water interfaces are adjusted to buried hill oil pool bottom water flooding regime by offset well, have sufficient energy to keep original formation pressure.
Operating principle of the present invention is:
During the end water level that buried hill oil reservoir water injection well and producing well when drilling well will enter the bottom, buried hill is put, because waterborne of the end of buried hill oil pool is the oil reservoir band, oil reservoir top is the gas-bearing formation zonation, be at oil well under the state of long-term exploitation, can make on the end water termination in the structure of the block buried hill of volume and move, be that oil-water interfaces constantly rise, cause the oil recovery moisture content situation that progressively raises, final well water 95% above closing well.The present invention utilizes in the buried hill water from bottom to top, oil, the gas regularity of distribution and adopt and hot air gas is injected in inner top position, buried hill the producing well section oil-water interface of water logging oil well is progressively moved down, so just can guarantee crude oil in the extraction well as much as possible, if aerogenesis still in the well in the oil recovery process, represent that then the OIH water termination is low excessively, can pass through again this moment to buried hill inner bottom part water flooding regime, oil-water interfaces are moved on progressively, like this by using water filling, method of gas injection is adjusted the oil gas oil-water interfaces position of buried hill reservoir, thereby play balance water filling gas injection effect, guarantee the unlikely reduction of recovery ratio.
The advantage that the present invention compared with prior art has is:
Owing to adopted mode from hot air to the buried hill tip position that inject, force that oil-water interfaces move down in the buried hill that has raise, thereby enlarged the oil reservoir volume, in addition in oil recovery process as aerogenesis phenomenon in the well occurs, show that promptly oil-water interfaces are low excessively, can adjust oil-water interfaces by water flooding regime again makes it to move, make interface energy keep stable equilibrium state, like this when recovering the oil, all the time more than the new produce oil water termination after the gas injection, exploit, thereby improved oil well yield, with the remaining oil extraction in the buried hill, oil well the dead oil situation can not occur yet.
In addition, need not newly bore producing well during construction, only need utilize intra-field OW construction can realize recovering the oil, economical especially, but improve oil well productivity again within a short period of time, existing recovery ratio is improved more than 15%, so this method is particularly suitable for the buried hill oil reservoir moisture percentage and exploit at 95% oil well.
Description of drawings:
Accompanying drawing is an operating principle schematic diagram of the present invention.
Among the figure by 1, water termination of the preceding end of gas injection, 2, the oil-water interfaces of liter waterborne at the bottom of the crude oil extraction, 3, new produce oil water termination after the gas injection, 4, the gas section, 5, the oil section, 6, the water section, 7, gas injection well, 8, producing well forms.
The specific embodiment:
The present invention is provided by following examples, below in conjunction with accompanying drawing the present invention is described further.
Embodiment 1:
Among Fig. 1, reply oil reservoir physical parameter is selected earlier before implementing, and this method is mainly used in carbonate buried hill, quartzy buried hill structural oil pool and the ligh-oil reservoir type.And lithology is shallow particle rock matter migmatite, granulite, biotite or shallow particle rock matter kataclastics in carbonate and the quartzite buried hill.The buried hill hole has diaclase, cracked hole and micropore dual media are arranged in the crack, the oil reservoir shape is block buried hill, and the OW that is bored in the rock mass that the bottom, buried hill has end water to exist will carry out shutoff to the former perforated interval of OW before the construction, and according to construction requirement dead chick hole again, in addition, the OW of being exploited, its moisture content is more than 95%, do not have and recover the oil when being worth, can select for use.Then, include the well section by 7 pairs of OWs that are determined of gas injection well and inject 350 ℃ of air, (this temperature is lower than former oil formation autoignition temperature) forces in the buried hill oil-water interfaces 2 of early stage because of liter waterborne at the bottom of the crude oil extraction, move down certain distance new produce oil water termination 3 to the gas injection, promptly till the balance interface place.
Embodiment 2:
When buried hill oil pool is exploited, after embodiment one step is finished, recover the oil in the reservoir after gas injection on the new produce oil water termination 3, when the extraction process moves down as new produce oil water termination 3 after gas injection occurring, promptly when having seen the demonstration of gas, producing well 8 exploitations can take by water injection well to buried hill bottom water filling means, carry out the oil-water interface adjustment, original formation pressure has enough energy in the well to keep.
Embodiment 3:
After the gas injection new produce oil water termination 3 determining positions what of oil well produce oil, it is most important therefore to control the position at this interface well, new produce oil water termination 3 is the balance interface location after the described gas injection.
Claims (1)
1. buried hill oil reservoir injection air oil production method, it is characterized in that: described method comprises the steps to finish:
One, at first buried hill oil storage rerum natura is selected:
The buried hill lithology is shallow particle rock matter migmatite, granulite matter kataclastics, biotite or the shallow particle rock matter kataclastics in the carbonate quartzite; In the hole of buried hill diaclase is arranged, the micropore dual media is arranged in the crack, the oil reservoir shape is block buried hill, and has end water to exist in the bottom, buried hill;
Two, well location is selected and is determined:
Select the buried hill oil reservoir to utilize OW in the existing oil field to carry out water filling gas injection and oil recovery and needn't bore new well, before the construction the former perforated interval of OW is carried out shutoff, and according to construction requirement dead chick hole again, its moisture content of the selected OW of construction well is more than 95%;
Three, the oil well that is determined is included the well section and injects 350 ℃ of hot airs, force early stage buried hill in to move down certain distance new produce oil water termination (3) to the gas injection because of the oil-water interfaces (2) of liter waterborne at the bottom of the crude oil extraction, promptly balance at the interface till;
Four, the buried hill oil reservoir is exploited:
After above-mentioned steps is finished, utilize after the gas injection reservoir section on the new produce oil water termination (3) to recover the oil again, as new produce oil water termination occurs and move down situation, come oil-water interfaces are adjusted to buried hill oil pool bottom water flooding regime by offset well, have sufficient energy to keep original formation pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100463954A CN100398779C (en) | 2006-04-17 | 2006-04-17 | Hot air filling balance oil recovery technique 'zhanqian' mountain oil reservoir |
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| CNB2006100463954A CN100398779C (en) | 2006-04-17 | 2006-04-17 | Hot air filling balance oil recovery technique 'zhanqian' mountain oil reservoir |
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| CN1834403A CN1834403A (en) | 2006-09-20 |
| CN100398779C true CN100398779C (en) | 2008-07-02 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042010B (en) * | 2010-09-07 | 2014-01-15 | 中国石油天然气股份有限公司 | Method for determining development position of fractured-vuggy carbonate reservoir |
| CN104912537B (en) * | 2015-05-13 | 2017-10-03 | 中国海洋石油总公司 | A kind of well net deployment method of huge thick buried hill fracture reservoir |
| CN106321041B (en) * | 2015-06-26 | 2019-02-01 | 中国石油化工股份有限公司 | A kind of later development method for oil reservoir exploitation |
| CN105089573A (en) * | 2015-07-21 | 2015-11-25 | 中国石油天然气股份有限公司 | Mining method for improving oil displacement efficiency of matrix and micro-fracture by dual-medium reservoir gas injection |
| CN104989349B (en) * | 2015-07-31 | 2018-06-01 | 中国石油化工股份有限公司 | A kind of constant volume body gas injection well gas injection rate design method |
| CN105298452B (en) * | 2015-10-26 | 2018-05-04 | 中国石油天然气股份有限公司 | Oil reservoir three-dimensional gas injection method and well pattern structure |
| CN105863581A (en) * | 2016-05-11 | 2016-08-17 | 中国石油天然气股份有限公司 | Oil extraction method for controlling water and increasing oil of high-water-content oil well of buried hill oil reservoir |
| CN107575191A (en) * | 2017-09-29 | 2018-01-12 | 中国石油大学(华东) | A kind of method of foam Assisted Gravity Drainage |
| CN112443300A (en) * | 2019-09-05 | 2021-03-05 | 沈阳烳汇科技有限公司 | Method for high-yield fractured buried hill oil reservoir |
| CN113622882B (en) * | 2021-09-06 | 2023-03-21 | 闫雪 | Air injection oil extraction equipment and oil extraction method for ancient buried hill oil reservoir |
| CN114016979A (en) * | 2021-11-05 | 2022-02-08 | 北京红蓝黑能源科技有限公司 | Oil and gas exploitation method for injecting water into water layer of oil and gas reservoir |
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| CN1465847A (en) * | 2002-06-28 | 2004-01-07 | 中国石油天然气股份有限公司 | Crude oil is mined by adopting a mode of firstly burning oil layer and then driving by steam |
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