CN100489266C - Method for detecting fluid-channeling channel of oil field - Google Patents
Method for detecting fluid-channeling channel of oil field Download PDFInfo
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- CN100489266C CN100489266C CNB2005100827941A CN200510082794A CN100489266C CN 100489266 C CN100489266 C CN 100489266C CN B2005100827941 A CNB2005100827941 A CN B2005100827941A CN 200510082794 A CN200510082794 A CN 200510082794A CN 100489266 C CN100489266 C CN 100489266C
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Abstract
The invention provides a method for detecting oil field fluid channeling, utilizing water-containing index characteristic curve to measure the performance of production well in the oil field, concretely speaking: collecting oil output and fluid output of the oil well from starting to test at regular intervals; calculating water-oil ratio or water ratio of the oil well at regular intervals; finding first-order derivative of common logarithm of the water-oil ratio or water ratio to common logarithm of time, namely the water-containing index; using the water-containing index as vertical coordinate and producing time as horizontal coordinate to make its half-logarithm relation curve and obtaining the water- containing index characteristic curve; detecting the type of the fluid channeling according to the shape of the water-containing index characteristic curve. And the method has objectivity and strong operability.
Description
Technical field
The invention provides a kind of method that the fluid-channeling channel type of water controlled field is detected, especially produce the type detection method that behavioral characteristics is changed to the different fluid-channeling channels on basis, for the oil field water and oil control provides technical support with highly aqueous field.
Background technology
Oil reservoir (oil field) is to exploit in the mode of oil well, near all exploitation of present most of oil wells had well (water injection well), by by well to flushing, replace with water drive and to eject crude oil (being also referred to as water drive oil), the oil field of recovering the oil with this method also becomes moisture oil field gradually, and wherein fluid-channeling channel is mainly injected water and for a long time the souring of oil reservoir middle and high infiltration band (crack, duct) formed in the oil well.Fluid-channeling channel mainly shows as slit formation, duct type and mixed type thereof in the oil reservoir.Though the thickness of fluid-channeling channel place layer is very little, have only several centimetres, the ratio of the shared water injection rate of its water absorption is very big.Therefore, the existence of fluid-channeling channel will cause poor efficiency water filling aggravation, cause a ton oil consumption water yield to increase considerably, and cause serious water filling waste, and oil-water displacement efficiency reduces.Will efficiently develop this class oil field or carry out water and oil control, at first the key issue that must solve is fluid-channeling channel and the diagnosis thereof in the understanding oil reservoir.
At present, concern and research to fluid-channeling channel have caused extensive attention in each oily company, but the research work that each oily company carries out in this field concentrates on the test in the pit shaft on the one hand, and the depth of stratum of the precision of its test, resolution ratio and detection is all limited, does not have breakthrough progress; On the other hand static geologic parameter is carried out fuzzy evaluation, judge the genuine existence of macropore qualitatively, its qualitative composition and subjective is a little less than the operability.
In sum, along with Oilfield developing, moisture oil field also progressively enters high water-cut stage, but the detection of the fluid-channeling channel that forms is not also set up an effective method with diagnosis, and the existence of fluid-channeling channel causes a large amount of injection water to circulate along fluid-channeling channel position poor efficiency.Solve the poor efficiency circulation of injecting water, improve the displacement efficiency of injecting water, just must carry out shutoff, so the detection of fluid-channeling channel seems more important fluid-channeling channel.
Summary of the invention
The key technology of guaranteeing fluid-channeling channel shutoff success is how to determine whether oil reservoir exists the pattern of fluid-channeling channel and fluid-channeling channel.The present invention is a target with the core technology that solves oilfields in high water cut period shutoff fluid-channeling channel, is changed to the basis with behavioral characteristics, has set up the type detection technology of the different fluid-channeling channels of a cover, for the oil field water and oil control provides technical support.
The invention provides the detection method of oil field fluid-channeling channel, it utilizes the moisture index indicatrix that the oil field is measured, and is specially: (1) presses oil production, the production fluid amount that constant duration is collected oil well, and the time is from the test of going into operation of this well; (2) press water-oil factor or the moisture content that constant duration calculates oil well; (3) ask the first derivative of the common logarithm of water-oil factor or moisture content, be moisture index the time common logarithm; (4) be that ordinate, production time are abscissa (that is, logarithmic coordinates) with moisture index, make its semilog relation curve, obtain the moisture index indicatrix; Detect and the type of definite fluid-channeling channel according to the form of described moisture index indicatrix.
If tracing pattern is mainly convex, then fluid-channeling channel is the duct type; If tracing pattern is mainly spill, then fluid-channeling channel is a slit formation.
As everyone knows, produce oil (liquid) amount of collecting oil well is the routine operation in the routine work of oil field, once a day, the time period that plays a crucial role in theory is that moisture content is greater than the creation data in 30% stage, but there is its particularity in the oil field, the speed difference that its moisture content rises, even the diverse location in same oil field, the speed that moisture content rises is also different, so this method is uncertain to the restriction of time, preferably from the test of going into operation of this well, therefore, above-mentioned " constant duration " is preferably 24 hours.
It adds up above-mentioned " calculating the water-oil factor or the moisture content of oil well " water-oil factor and is meant the tired ratio that produces water and tired produce oil based on water-oil factor (being also referred to as accumulative total water-oil factor CWOR), and moisture content is meant the tired ratio that produces water and tired produce oil+water.According to formula log (CWOR
I+1/ CWOR
i)/log (T
I+1/ T
i) can try to achieve moisture index, moisture index and production time are painted on promptly get the moisture index indicatrix on the semilog plot.
Owing to exist the influence of various uncertain factors in the measuring process, the data that measure are sneaked into noise data inevitably, make an uproar so need remove, the present invention preferably removes by wavelet transformation and makes an uproar, and promptly with the small wave converting method in the mathematical method above-mentioned data is carried out smooth treatment.Mathematical small echo removes to make an uproar and all is widely used in different field, and this method specifically can (" Matlab wavelet analysis tool box principle and application " Dong Changhong edits .2004: National Defense Industry Press) referring to list of references in the appendix.Therefore, said method of the present invention comprises also that preferably the moisture content that will obtain in (2) or water-oil factor and time relation carry out smooth treatment to remove the step of making an uproar.
Generally speaking, fluid-channeling channel forms back production behavioral characteristics, and marked change will take place, and these behavioral characteristics change will mainly be reflected as the variation of producing water (or water breakthrough) speed on development index.Can inference, in having the oil reservoir of fluid-channeling channel, its moisture rising rule has the characteristics of himself; Different fluid-channeling channel types, its moisture rising rule is different.
The present invention is on the basis of field produces behavioral characteristics, to make the moisture index curvilinear characteristic is main detection method, and verify with routine techniques, set up an alignment and made a definite diagnosis the type detection method of disconnected fluid-channeling channel, it is qualitative to have objectivity, workable, for the oil field water and oil control provides the good technical support.
Description of drawings
Fig. 1: the moisture index indicatrix of 1-8.4 oil well;
Fig. 2: the moisture index indicatrix of+1-8.4 oil well;
Fig. 3: the moisture index indicatrix of 3-9.2 oil well;
Fig. 4: the moisture index indicatrix of+3-9.4 oil well;
Fig. 5: the moisture index indicatrix of+7-0.2 oil well;
Fig. 6: the moisture index indicatrix of 2-056 oil well.
The specific embodiment
Describe the present invention in detail below in conjunction with specific embodiment, but do not limit practical range of the present invention.
Fluid-channeling channel detection method with oil field, Fuyu County, Jilin is an example.Oil field, Fuyu County, Jilin is a very strong oil field of non-homogeneity, and formation condition is very complicated, and also there are the secondary macropore that forms after man-made fracture and the long-period water drive in existing intrinsic fracture and high infiltration band, cause injecting the invalid circulation of water, form serious water breakthrough.
The present invention has selected two well groups that the practical situations of fluid-channeling channel type detection method is described at oil field, Fuyu County 5-8 test block.
The A.+3-9.2 well group
Be the drawing process of example explanation well water indicatrix below with the 1-8.4 oil well.
From the monthly production report of 1-8.4 oil well, choose tired water and the tired produce oil of producing, begin to calculate production time T from bringing in, the tired product water of each time point (i represents time point, and i+1 represents next time point) obtains accumulative total water-oil factor CWOR divided by tired produce oil, then according to formula log (CWOR
I+1/ CWOR
i)/log (T
I+1/ T
i), " also can be expressed as (logCWOR
I+1-logCWOR
i)/(logT
I+1-logT
i) " try to achieve moisture index, moisture index and production time are painted on promptly get moisture index indicatrix (see figure 1) on the semilog plot.
+ 1-8.4 oil well (see figure 2) is identical with the 1-8.4 oil well with the making step of the moisture index indicatrix of 3-9.2 oil well (see figure 3).
More than the moisture index indicatrix of three mouthfuls of oil wells all present tangible convex shape on the whole.According to method of the present invention (fluid-channeling channel is that its moisture index indicatrix change shape of oil well of duct type is a convex), illustrate that the fluid-channeling channel that three mouthfuls of oil wells of this well group exist is the duct type.
Checking: check (need to prove that the granular pattern blocking agent can enter the crack, and can not enter the duct to fluid-channeling channel by injecting different blocking agents (granular pattern, gel-type) in August, 2004; The gel-type blocking agent can enter the crack, also can enter the duct).
Pump pressure is 3.5Mpa during the normal water filling of this well, and when the swollen liquid of body (about 200.0 kilograms) that the injection test small particles is mixed, pressure rises to 8.0Mpa rapidly, reaches 10.0Mpa (phenomenon occurring annotating not advance) when the highest.Annotate the swollen fluid-tight of granular pattern body when chinking via statistical result showed, average injection pressure is 5.9Mpa, and inject the swollen liquid consumption of body this moment will be above 1000.0 kilograms; After change gel-filled type blocking agent, injection pressure is normal.Well when injecting according to blocking agent is dynamic, and there is duct type fluid-channeling channel in on-the-spot understanding for this well group, conforms to explanation results.The presentation of results detection method of the present invention of checking is believable.
B.5-9.2 well group
Oil field, Fuyu County, Jilin 5-9.2 well, the moisture index indicatrix of oil well+3-9.4 that it is corresponding is tangible spill (see figure 4) on the whole, according to detection method of the present invention (fluid-channeling channel is that its moisture index indicatrix change shape of oil well of slit formation is a spill), conclusion is that oil well+3-9.4 exists the slit formation fluid-channeling channel.
Again fluid-channeling channel is tested by injecting different blocking agents (granular pattern, gel-type).
5-9.2 well is annotated 150.0 sides altogether, has used 1960.0 kilograms of volume expansion grains, injection pressure just rises to 6.0Mpa by 4.3Mpa, and the pressure ascensional range is normal.There is the slit formation fluid-channeling channel in this well of on-site interpretation.The fluid-channeling channel type conforms to explanation results.
Embodiment 3
The C.+7-0.2 well
This well moisture index indicatrix is seen Fig. 5.As can be seen from Figure 5, its indicatrix is matrix, and according to detection method of the present invention, the fluid-channeling channel type of this well is the slit formation (see figure 5).
This well was once monitored with tracer.The monitoring explanation results is for there being the slit formation fluid-channeling channel, and is consistent with moisture characteristic index curve interpretation result.
D.2-056 well
This well moisture index indicatrix is seen Fig. 6.As can be seen from Figure 6, its indicatrix is matrix, and according to detection method of the present invention, the fluid-channeling channel type of this well is the slit formation (see figure 6).
This well was once monitored with tracer.The monitoring explanation results is for there being the slit formation fluid-channeling channel, and is consistent with moisture characteristic index curve interpretation result.
Claims (3)
1. the detection method of oil field fluid-channeling channel is characterized in that, utilizes the moisture index indicatrix that the oil field is measured, and comprising:
(1) press oil production, the production fluid amount that constant duration is collected oil well, the time is from the test of going into operation of this well;
(2) water-oil factor or the moisture content of calculating oil well;
(3) ask the first derivative of the common logarithm of water-oil factor or moisture content, be moisture index the time common logarithm;
(4) be that ordinate, production time are abscissa with moisture index, make its semilog relation curve, obtain the moisture index indicatrix;
Determine the type of oil field fluid-channeling channel according to the form of described moisture index indicatrix;
If described moisture index indicatrix form convex, then fluid-channeling channel is the duct type;
If described moisture index indicatrix form spill, then fluid-channeling channel is a slit formation.
2. the detection method of oil field fluid-channeling channel as claimed in claim 1 is characterized in that, comprises that also the moisture content that will obtain in (2) or water-oil factor and time relation carry out data smoothing and handle the step of making an uproar to remove.
3. the detection method of oil field fluid-channeling channel as claimed in claim 1 is characterized in that, described water-oil factor is the tired ratio that produces water and tired produce oil, and described moisture content is tired water and the tired produce oil+tired ratio that produces the water sum of producing.
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| CN100489266C true CN100489266C (en) | 2009-05-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102012347B (en) * | 2010-09-19 | 2012-08-29 | 中国海洋石油总公司 | Method for detecting channeling condition by static gelatinization strength of cement |
| CN102913233B (en) * | 2012-11-03 | 2015-02-04 | 中国石油大学(华东) | Method for recognizing dominant flow channel based on zero dimension comparison plate |
| CN104453807B (en) * | 2014-10-29 | 2016-10-19 | 中国海洋石油总公司 | A kind of oil field injection and extraction well group water drive channelling method of discrimination |
| CN104747149B (en) * | 2015-01-22 | 2016-04-06 | 中国石油大学(华东) | The detection method of passage is altered in the agent of binary combination flooding |
| CN104564049B (en) * | 2015-01-22 | 2016-04-06 | 中国石油大学(华东) | Polymer flooding gathers the detection method of altering passage |
| CN104989344B (en) * | 2015-06-04 | 2017-05-10 | 中国石油大学(华东) | Method for determining gas channeling degree in nitrogen foam oil displacing process |
| CN110231436A (en) * | 2018-03-02 | 2019-09-13 | 中国石油天然气股份有限公司 | Casing loss detection method |
| CN109267994A (en) * | 2018-10-29 | 2019-01-25 | 中国石油天然气股份有限公司 | Low-permeability oilfield water channeling mode identification method and device |
| CN110821485B (en) * | 2019-11-07 | 2023-03-21 | 成都北方石油勘探开发技术有限公司 | Hypertonic strip judging method based on HALL curve |
| CN113494263B (en) * | 2020-04-08 | 2023-04-25 | 中国石油化工股份有限公司 | Method for plugging water channeling crack of tight oil reservoir oil well, method and device for calculating volume |
| CN112360441A (en) * | 2020-11-03 | 2021-02-12 | 中国石油化工股份有限公司 | Method for calculating volume of main flow channel of high-water-consumption strip |
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| US5253518A (en) * | 1990-08-31 | 1993-10-19 | Exxon Production Research Company | Apparatuses and methods for adjusting a material's fluid content and effective stresses |
| CN1212317A (en) * | 1997-07-16 | 1999-03-31 | 景辉元 | Method and device for gas recovering and transporting fluid |
| CN1360213A (en) * | 2001-12-13 | 2002-07-24 | 刘安建 | Tracing technique for detecting micro substance between wells in oil field |
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2005
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4695957A (en) * | 1984-06-30 | 1987-09-22 | Prad Research & Development N.V. | Drilling monitor with downhole torque and axial load transducers |
| US5253518A (en) * | 1990-08-31 | 1993-10-19 | Exxon Production Research Company | Apparatuses and methods for adjusting a material's fluid content and effective stresses |
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| CN1360213A (en) * | 2001-12-13 | 2002-07-24 | 刘安建 | Tracing technique for detecting micro substance between wells in oil field |
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