CN103953336A - Evaluation method for judging water-oil-gas distribution in petroleum and natural gas reservoir stratum - Google Patents
Evaluation method for judging water-oil-gas distribution in petroleum and natural gas reservoir stratum Download PDFInfo
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- CN103953336A CN103953336A CN201410206646.5A CN201410206646A CN103953336A CN 103953336 A CN103953336 A CN 103953336A CN 201410206646 A CN201410206646 A CN 201410206646A CN 103953336 A CN103953336 A CN 103953336A
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Abstract
The invention discloses an evaluation method for judging water-oil-gas distribution in a petroleum and natural gas reservoir stratum. A novel gas logging and gas interpretation and evaluation method which has certain application range and is prior to a Pixler method in the judgment of a gas reservoir, an oil reservoir, a water-oil reservoir and a water reservoir of the reservoir stratum is summarized according to three gas ratios, namely C2/C1 (the ratio of ethane to methane), C3/C1 (the ratio of propane to methane) and C4/C1 (the ratio of butane to methane) by using statistic analysis of field gas logging and well completion oil testing data of a petroleum and natural gas exploration and development well. The evaluation method has the advantages of simpleness, practicality, higher coincidence rate and wide application range. Particularly, the evaluation method has unique technical advantages of quickly and accurately obtaining the characteristics of water, oil and gas contained in an underground reservoir stratum by drilling in the logging while drilling operation process of petroleum and natural gas exploration and development.
Description
Technical field
The present invention relates to a kind of for judging the evaluation method of oil and gas and water distribution in petroleum gas reservoir, specifically, be in petroleum natural gas exploration compound logging or gas detection logging operation process, judge reservoir fluid character one intuitively, gas explanation evaluating method fast.
Background technology
In well logging comprehensive interpretation and evaluation, when the oiliness of identification reservoir, the property of water-bearing of effectively identifying reservoir is particularly important.But the further judgement of oil-water common-layer, oil-containing water layer and water layer to oil gas water reservoir is determined, is the difficult point of logging explanation appraisal always.Previous way is generally with reference to offset well formation testing conclusion, in conjunction with being explained that the non-hydrocarbon gas demonstration of well reservoir and drilling fluid conductivity, density, the isoparametric variation of temperature come comprehensive interpretation and evaluation oil-water common-layer, oil-containing water layer and water layer, but these information, except offset well formation testing conclusion, tend to logging explanation personnel to introduce mistaken ideas in practice interpretation evaluation procedure.
Summary of the invention
Technical problem to be solved by this invention is, provide a kind of intuitively, fast for judging the evaluation method of oil and gas and water distribution in petroleum gas reservoir.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: a kind of for judging the evaluation method of oil and gas and water distribution in petroleum gas reservoir, comprise the following steps:
(1) concentration C of the methane under a certain degree of depth from the reservoir of site mud logging detection oil/gas show
1, ethane concentration C
2, propane concentration C
3, butane concentration C
4;
(2) calculate hydrocarbon ratio: utilize computational tool to calculate C
2c
1, C
3c
1, C
4c
1value;
(3) if 0.10 < C
2c
1≤ 0.20, and 0.06 < C
3c
1≤ 0.14,0.02 < C
4c
1≤ 0.08, reservoir is oil reservoir;
If 0.10 < C
2c
1≤ 0.20, and 0.03 < C
3c
1≤ 0.06, C
4c
1≤ 0.02, reservoir is oil-water common-layer;
If 0.10 < C
2c
1≤ 0.20, and C
3c
1≤ 0.03, C
4c
1≤ 0.02, reservoir is oil-containing water layer;
(4) if 0.07 < C
2c
1≤ 0.10, and 0.03 < C
3c
1≤ 0.06, C
4c
1≤ 0.02, reservoir is oil-water common-layer;
If 0.07 < C
2c
1≤ 0.10, and C
3c
1≤ 0.03, C
4c
1≤ 0.02, reservoir is oil-containing water layer;
If 0.07 < C
2c
1≤ 0.10, and 0.06 < C
3c
1≤ 0.14, C
4c
1≤ 0.02, reservoir is oil-water common-layer;
(5) if C
2c
1≤ 0.07, and C
3c
1≤ 0.03, C
4c
1≤ 0.02, reservoir is water layer;
If C
2c
1≤ 0.07, and 0.03 < C
3c
1≤ 0.06, C
4c
1≤ 0.02, reservoir is oil-containing water layer;
(6) if C
2/ C
1> 0.2, and C
3c
1> 0.14, C
4c
1> 0.08, reservoir is gas-bearing formation;
If C
2/ C
1> 0.2, and 0.06 < C
3c
1≤ 0.14,0.02 < C
4c
1≤ 0.08, reservoir is that oil gas is with layer;
If C
2/ C
1> 0.2, and C
3/ C
1≤ 0.06, C
4/ C
1≤ 0.02, reservoir is gassiness water layer.
In described step (1), gather the hydrocarbon gas constituent content of subsurface reservoir by comprehensive logging instrument.
Described step (1) detects to analyze by comprehensive logging instrument and obtains the drilled reservoir of opening and discharge and invade the hydrocarbon gas constituent content in well drilling fluid.
Concentration in described step (1) is volumetric concentration percentage.
The invention has the beneficial effects as follows: simple, practical, coincidence rate is higher, applied widely, that particularly develops at oil-gas drilling obtains boring the oily water-based of opening underground reservoir with boring in mud logging operation process quickly and accurately, has unique technical advantage.
Brief description of the drawings
Fig. 1 is interpretation chart of the present invention.
The inventive method--hydrocarbon is than the integrated application example of knuckle method interpretation chart board for application for Fig. 2.
Fig. 3 is that CH33 well well section 3610.00～3681.00m oil reservoir hydrocarbon is than knuckle method interpretation chart board.
Fig. 4 is that CH35 well well section 3750.00～3784.00m oil-water common-layer hydrocarbon is than knuckle method interpretation chart board.
Fig. 5 is that G4-41 well well section 1877.00～1904.00m water layer hydrocarbon is than knuckle method interpretation chart board.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
The present invention, for judging the evaluation method of oil and gas and water distribution in petroleum gas reservoir, comprises the following steps:
(1) concentration C of the methane under a certain degree of depth from the reservoir of site mud logging detection oil/gas show
1, ethane concentration C
2, propane concentration C
3, butane concentration C
4;
(2) calculate hydrocarbon ratio: utilize computational tool to calculate C
2c
1, C
3c
1, C
4c
1value;
(3) if 0.10 < C
2c
1≤ 0.20, and 0.06 < C
3c
1≤ 0.14,0.02 < C
4c
1≤ 0.08, reservoir is oil reservoir;
If 0.10 < C
2c
1≤ 0.20, and 0.03 < C
3c
1≤ 0.06, C
4c
1≤ 0.02, reservoir is oil-water common-layer;
If 0.10 < C
2c
1≤ 0.20, and C
3c
1≤ 0.03, C
4c
1≤ 0.02, reservoir is oil-containing water layer;
(4) if 0.07 < C
2c
1≤ 0.10, and 0.03 < C
3c
1≤ 0.06, C
4c
1≤ 0.02, reservoir is oil-water common-layer;
If 0.07 < C
2c
1≤ 0.10, and C
3c
1≤ 0.03, C
4c
1≤ 0.02, reservoir is oil-containing water layer;
If 0.07 < C
2c
1≤ 0.10, and 0.06 < C
3c
1≤ 0.14, C
4c
1≤ 0.02, reservoir is oil-water common-layer;
(5) if C
2c
1≤ 0.07, and C
3c
1≤ 0.03, C
4c
1≤ 0.02, reservoir is water layer;
If C
2c
1≤ 0.07, and 0.03 < C
3c
1≤ 0.06, C
4c
1≤ 0.02, reservoir is oil-containing water layer;
(6) if C
2/ C
1> 0.2, and C
3c
1> 0.14, C
4c
1> 0.08, reservoir is gas-bearing formation;
If C
2/ C
1> 0.2, and 0.06 < C
3c
1≤ 0.14,0.02 < C
4c
1≤ 0.08, reservoir is that oil gas is with layer;
If C
2/ C
1> 0.2, and C
3/ C
1≤ 0.06, C
4/ C
1≤ 0.02, reservoir is gassiness water layer.
In described step (1), gather the hydrocarbon gas constituent content of subsurface reservoir by comprehensive logging instrument.
Described step (1) detects to analyze by comprehensive logging instrument and obtains the drilled reservoir of opening and discharge and invade the hydrocarbon gas constituent content in well drilling fluid.
Concentration in described step (1) is volumetric concentration percentage.
Below in conjunction with specific embodiment, using method of the present invention is described:
As shown in Figure 1, for directly perceived and easy to use, first press the region of table 1 and divide, make Fig. 1, for image statement, be called hydrocarbon ratio knuckle method.
Table 1 hydrocarbon ratio knuckle of the present invention method gas is surveyed interpretation and evaluation standard
Note: " (" represents not containing endpoint value, ") " represents containing endpoint value.
Be described as follows for Fig. 1:
1. under normal circumstances, in petroleum gas reservoir, gas and oil glassware for drinking water has from top to bottom and to distribute, gas and oil on top, profit at middle part, water is in bottom.In the time that the various interpretation charts that carry out the judgement of reservoir fluid property identification are made, should follow this rule Ji You district, profit district, pool and distribute from top to bottom, upper position, the profit district that makes exactly HYDROCARBON-BEARING REGION occupy chart board occupy meta, pool occupy the next.The chart board that hydrocarbon ratio knuckle method is set up has been followed oil and gas and water distribution rule in reservoir intuitively.
2.C
2/ C
1, C
3/ C
1, C
4/ C
1three hydrocarbon gas ratios adopt linear graduation at hydrocarbon on than knuckle method chart board on longitudinally, and decentralization is better, and boundary is fairly obvious each other for gas area, You Qu, profit district, pool.
3. hydrocarbon ratio knuckle method gas interpretation chart adopts linear graduation on longitudinally, can not only find the slope variation of hydrocarbon gas ratio parameter line on chart board, also has obvious line knuckle (C simultaneously
3c
1point) variation, the size of its hydrocarbon gas ratio line slope of fluid of different nature and knuckle all has different reflection feature and form.
4. in comprehensive logging system or gas detection logging system, can directly carry out data loading operations, and the hydrocarbon ratio knuckle method of utilizing the gas articulating to survey under interpretation and evaluation program obtains explanation conclusion automatically.
5. under the condition supporting without logging system, also can realize computer and automatically process, just need a small-sized application program of establishment.
Embodiment 1
Discrimination stomatodeum falls into and is positioned at Bohai gulf basin innerland, is one of sags rich in oil and gas maximum in Bohai gulf basin.Extracted the formation testing data and the respective layer position gas detection logging data (in table 2) that are positioned at sunken 9 the formation testing intervals of 8 oral examination oil wells of discrimination stomatodeum, application hydrocarbon has been drawn interpretation chart (seeing Fig. 2) than knuckle method.
Table 2 formation testing data and corresponding gas detection logging hydrocarbon ratio and respective explanations result contrast table
Oil reservoir: CH33 well well section 3610.00～3681.00m.This each hydrocarbon ratio of well section well depth (in table 3) some line hydrocarbon than knuckle method chart board on the distribution of (seeing Fig. 3), all drop within the scope of oily district, gas detection logging is interpreted as oil reservoir.For the formation testing of 3611.40～3685.50m well section, penetrate out 5 layers, thickness 20.60m, formation testing obtains production capacity 55.20t/d, and oil density is 0.81g/cm
3, viscosity is 4.68mPa.s.This instance analysis shows, chart board explanation results conforms to formation testing conclusion.
Table 3CH33 well well section 3610.00～3681.00m gas surveys data and chart board is explained
Oil-water common-layer: this each hydrocarbon ratio of well section well depth (in table 4) some line of CH35 well well section 3750.00～3784.00m hydrocarbon than knuckle method chart board on the distribution of (seeing Fig. 4), all drop within the scope of profit district, gas detection logging is interpreted as oil-water common-layer.In the formation testing of 3752.80～3787.50m well section, penetrate out 4 layers, thickness 23.10m, produce oil 45.00t/d, water 72.34m3/d, formation testing conclusion is oil-water common-layer.This instance analysis shows, chart board explanation results conforms to formation testing conclusion.
Table 4CH35 well well section 3750.00～3784.00m gas surveys data and chart board is explained
Water layer: G4-41 well well section 1877.00～1904.00m.This each hydrocarbon ratio of well section well depth (in table 5) some line hydrocarbon than knuckle method chart board on the distribution of (seeing Fig. 5), all drop within the scope of pool, gas detection logging is interpreted as water layer.In the formation testing of 1872.80～1902.20m well section, penetrate out 2 layers, thickness 9.80m, produce water 25.55m
3/ d, formation testing conclusion is water layer.
Table 5G4-41 well well section 1877.00～1904.00m gas surveys data and chart board is explained
The present invention utilizes gas detection logging to detect the Changing Pattern of analyzing between the hydrocarbon gas component parameter obtaining, can effectively reflect the oil-gas possibility of reservoir, can effectively judge again its property of water-bearing, this be for a long time logging explanation assessment technique personnel always in the continuous problem of practical exploration and innovation.Hydrocarbon of the present invention is to adopt C than knuckle rule
2/ C
1, C
3/ C
1, C
4/ C
1three ratios, by mass data statistical analysis, search out the hydrocarbon ratio size of all kinds of reservoirs in oil gas water reservoir, the each ratio point line Changing Pattern at C3/C1 point knuckle, and the mud logging gas explanation evaluating method of a kind of meticulousr judgement that can effectively realize reservoir fluid character creating.
From hydrocarbon than can obviously finding out knuckle method gas interpretation and evaluation chart board, it has not only marked off gas area, You Qu clearly, and by the division in profit district and pool, the further clear and definite property of water-bearing of reservoir, and then realized the fine evaluation of different reservoirs.
While using method of the present invention, whether the reservoir of describing according to geological logging has the abnormal high value of total hydrocarbon in gas logging.Just do not carry out evaluating reservoir if there is no the abnormal high value of total hydrocarbon.If there is the abnormal high value of total hydrocarbon, draw than knuckle method and evaluation criterion thereof the explanation conclusion that reservoir is final according to hydrocarbon.
There is the abnormal high value of total hydrocarbon for reservoir, according to C in total hydrocarbon abnormal show section
2/ C
1, C
3/ C
1, C
4/ C
1three ratios at hydrocarbon than the location positioning properties of fluid in bearing stratum on knuckle method chart board;
If C
2/ C
1, C
3/ C
1, C
4/ C
1three ratio parameters unanimously drop in an interval range of chart board, provide corresponding explanation conclusion.
In sum, content of the present invention is not limited in the above-described embodiment, and the knowledgeable people in same area can propose easily other embodiment within technological guidance's thought of the present invention, but this embodiment comprises within the scope of the present invention.
Claims (4)
1. for judging an evaluation method for oil and gas and water distribution in petroleum gas reservoir, it is characterized in that, comprise the following steps:
(1) concentration C of the methane under a certain degree of depth from the reservoir of site mud logging detection oil/gas show
1, ethane concentration C
2, propane concentration C
3, butane concentration C
4;
(2) calculate hydrocarbon ratio: utilize computational tool to calculate C
2c
1, C
3c
1, C
4c
1value;
(3) if 0.10 < C
2c
1≤ 0.20, and 0.06 < C
3c
1≤ 0.14,0.02 < C
4c
1≤ 0.08, reservoir is oil reservoir;
If 0.10 < C
2c
1≤ 0.20, and 0.03 < C
3c
1≤ 0.06, C
4c
1≤ 0.02, reservoir is oil-water common-layer;
If 0.10 < C
2c
1≤ 0.20, and C
3c
1≤ 0.03, C
4c
1≤ 0.02, reservoir is oil-containing water layer;
(4) if 0.07 < C
2c
1≤ 0.10, and 0.03 < C
3c
1≤ 0.06, C
4c
1≤ 0.02, reservoir is oil-water common-layer;
If 0.07 < C
2c
1≤ 0.10, and C
3c
1≤ 0.03, C
4c
1≤ 0.02, reservoir is oil-containing water layer;
If 0.07 < C
2c
1≤ 0.10, and 0.06 < C
3c
1≤ 0.14, C
4c
1≤ 0.02, reservoir is oil-water common-layer;
(5) if C
2c
1≤ 0.07, and C
3c
1≤ 0.03, C
4c
1≤ 0.02, reservoir is water layer;
If C
2c
1≤ 0.07, and 0.03 < C
3c
1≤ 0.06, C
4c
1≤ 0.02, reservoir is oil-containing water layer;
(6) if C
2/ C
1> 0.2, and C
3c
1> 0.14, C
4c
1> 0.08, reservoir is gas-bearing formation;
If C
2/ C
1> 0.2, and 0.06 < C
3c
1≤ 0.14,0.02 < C
4c
1≤ 0.08, reservoir is that oil gas is with layer;
If C
2/ C
1> 0.2, and C
3/ C
1≤ 0.06, C
4/ C
1≤ 0.02, reservoir is gassiness water layer.
2. according to claim 1ly it is characterized in that for judging the evaluation method of oil and gas and water distribution in petroleum gas reservoir, in described step (1), gather the hydrocarbon gas constituent content of subsurface reservoir by comprehensive logging instrument.
3. according to claim 1 for judging the evaluation method of oil and gas and water distribution in petroleum gas reservoir, it is characterized in that, described step (1) detects to analyze by comprehensive logging instrument and obtains the drilled reservoir of opening and discharge and invade the hydrocarbon gas constituent content in well drilling fluid.
4. according to claim 1ly it is characterized in that for judging the evaluation method of oil and gas and water distribution in petroleum gas reservoir, the concentration in described step (1) is volumetric concentration percentage.
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|---|---|
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Family
ID=51330667
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| CN106150449A (en) * | 2015-04-22 | 2016-11-23 | 中国石油化工股份有限公司 | A kind of recognition methods of the fluid properties invading open oil-gas reservoir for carbon dioxide |
| CN106442757A (en) * | 2016-08-31 | 2017-02-22 | 中国石油集团渤海钻探工程有限公司 | Judgment method for oil-water layer |
| CN109736792A (en) * | 2019-01-07 | 2019-05-10 | 中国石油集团川庆钻探工程有限公司 | Natural gas reservoirs and its automatic identifying method containing fluid properties |
| CN115078599A (en) * | 2021-03-10 | 2022-09-20 | 中国石油化工股份有限公司 | Reservoir connectivity evaluation method based on crude oil full-component concentration |
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| CN105240006B (en) * | 2015-10-28 | 2018-07-10 | 陈国军 | A kind of oil-water layer identification method suitable for volcanic rock reservoir |
| CN106442757A (en) * | 2016-08-31 | 2017-02-22 | 中国石油集团渤海钻探工程有限公司 | Judgment method for oil-water layer |
| CN106442757B (en) * | 2016-08-31 | 2019-04-02 | 中国石油集团渤海钻探工程有限公司 | A kind of determination method of oil-water-layer |
| CN109736792A (en) * | 2019-01-07 | 2019-05-10 | 中国石油集团川庆钻探工程有限公司 | Natural gas reservoirs and its automatic identifying method containing fluid properties |
| CN109736792B (en) * | 2019-01-07 | 2022-09-06 | 中国石油集团川庆钻探工程有限公司 | Natural gas reservoir and automatic identification method of fluid-containing property thereof |
| CN115078599A (en) * | 2021-03-10 | 2022-09-20 | 中国石油化工股份有限公司 | Reservoir connectivity evaluation method based on crude oil full-component concentration |
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