CN107060748A - A kind of oil-gas-water layer well logging starry sky explanation evaluating method - Google Patents

A kind of oil-gas-water layer well logging starry sky explanation evaluating method Download PDF

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Publication number
CN107060748A
CN107060748A CN201710426025.1A CN201710426025A CN107060748A CN 107060748 A CN107060748 A CN 107060748A CN 201710426025 A CN201710426025 A CN 201710426025A CN 107060748 A CN107060748 A CN 107060748A
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China
Prior art keywords
gas
oil
water layer
methane
spheroid
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CN201710426025.1A
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Chinese (zh)
Inventor
宋义民
杜巍
王文起
李毅逵
孟庆峰
李冬蕾
吴颖
孙红华
刘淑侠
徐捷
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CNPC Bohai Drilling Engineering Co Ltd
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CNPC Bohai Drilling Engineering Co Ltd
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Priority to CN201710426025.1A priority Critical patent/CN107060748A/en
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells

Abstract

The invention discloses a kind of oil-gas-water layer well logging starry sky explanation evaluating method, choose oil gas water sensitive parameter total hydrocarbon, methane, TPI and build three-dimensional space interpretation chart, efficiently solve the dotted cross present in plane plate, it is overlapping and the deficiency such as block, make logging explanation more accurate, select layer to provide reliable value layer for formation testing, improve exploration and development overall efficiency.

Description

A kind of oil-gas-water layer well logging starry sky explanation evaluating method
Technical field
The invention belongs to hydrocarbon zone interpretation assessment technique field, especially a kind of oil-gas-water layer well logging starry sky interpretation and evaluation side Method.
Background technology
At present, well logging hydrocarbon zone interpretation plate is a lot, and important function, but these have been played to reservoir fluid qualitative evaluation Plate is made up of plane coordinate system, and interpretation layer feature is showed in the form of point, line, the inadequate natural endowment one that they are present Be using parameter it is few, two be there is dotted cross, overlapping and eclipse phenomena so that oil gas water price value distinguish it is different not ideal enough.Cause This, using more parameters, spatially shows the feature that crosses of reservoir, can effectively be avoided plane plate from existing not Foot.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of oil-gas-water layer well logging starry sky explanation evaluating method, use Three-dimensional space interpretation chart, marks off the region of oil-gas-water layer spatially, improves oil gas and water layer interpretation precision, lifting record Well interpretation coincidence rate.
In order to solve the above technical problems, the technical solution adopted by the present invention：A kind of oil-gas-water layer well logging starry sky interpretation and evaluation Method, comprises the following steps：
The first step sets up X, Y, Z 3 D stereo coordinate system；
Second step chooses oil gas water sensitive parameter and represents each reference axis respectively；
(1) oil gas water sensitive parameter chooses total hydrocarbon in gas logging, methane percentage contents, rock pyrolysis analysis TPI；
A. sample point hydrocarbon total amount, hydrocarbon total amount=C1+C2+C3+iC4+nC4+iC5+nC5 are calculated；
B. methane percentage contents=methane content/hydrocarbon total amount × 100%；
C. rock pyrolysis analysis TPI chooses sidewall coring or core analysis data；
(2) X-axis is total hydrocarbon, and Y-axis is methane, and Z axis is TPI；
3rd step is in a coordinate system handed over the sample point total hydrocarbon, methane, TPI data of a certain regional formation testing confirmation Converge, joint occurs in the form of spheroid, represents fluid of different nature with different colors, determine residing for oil-producing Gas-Water Contant Locus, i.e. value space；
4th step is needing the relevant parameter of interpretation layer to cross in a coordinate system, according to the space bit residing for the spheroid that crosses Put and qualitative evaluation is carried out to its fluid properties.
Qualitative evaluation in 4th step：Spheroid is construed at oil reservoir, spheroid in oil reservoir georeferencing regionalism Gas-bearing formation is construed in gas-bearing formation georeferencing regionalism, spheroid is construed to water layer in water layer georeferencing regionalism.
The beneficial effects of the invention are as follows：The deficiency present in plane plate is efficiently solved, makes logging explanation more smart Standard, selects layer to provide reliable value layer, improves exploration and development overall efficiency for formation testing.
Brief description of the drawings
Fig. 1 is oil-gas-water layer logging parameters indicatrix schematic diagram of the present invention.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and detailed description：
The oil-gas-water layer well logging starry sky explanation evaluating method of the present invention, comprises the following steps：
The first step sets up X, Y, Z 3 D stereo coordinate system；
Second step chooses oil gas water sensitive parameter and represents each reference axis respectively；
(1) oil gas water sensitive parameter chooses total hydrocarbon in gas logging, methane percentage contents, rock pyrolysis analysis TPI；
A. sample point hydrocarbon total amount, hydrocarbon total amount=C1+C2+C3+iC4+nC4+iC5+nC5 are calculated；
B. methane percentage contents=methane content/hydrocarbon total amount × 100%；
C. rock pyrolysis analysis TPI chooses sidewall coring or core analysis data；
(2) X-axis is total hydrocarbon, and Y-axis is methane, and Z axis is TPI；
3rd step is in a coordinate system handed over the sample point total hydrocarbon, methane, TPI data of a certain regional formation testing confirmation Converge, joint occurs in the form of spheroid, represents fluid of different nature with different colors, determine residing for oil-producing Gas-Water Contant Locus, i.e. value space；
4th step is needing the relevant parameter of interpretation layer to cross in a coordinate system, according to the space bit residing for the spheroid that crosses Put and qualitative evaluation is carried out to its fluid properties.Spheroid is construed to oil reservoir in oil reservoir georeferencing regionalism, and spheroid is in gas Sheaf space reference locality feature is construed to gas-bearing formation, and spheroid is construed to water layer in water layer georeferencing regionalism.
Illustrated with reference to specific embodiment：
The first step collects a certain regional formation testing layer logging parameters, determines oil gas water sensitive parameter, sets up starry sky interpretation chart. As X Region of Oil-gas water layer logging parameters see the table below：
Sequence number Pound sign Well section (m) Total hydrocarbon (%) The suitable percentage composition of methane (%) TPI Formation testing result
1 X1 2850-2853 13.887 44.99 0.573 Oil reservoir
2 2860-2862 18.280 58.42 0.573 Oil reservoir
3 2865-2868 45.060 54.13 0.568 Oil reservoir
4 X2 2795-2798 35.908 55.21 0.694 Oil reservoir
5 2800-2802 29.128 51.50 0.791 Oil reservoir
6 2806-2808 21.497 41.36 0.668 Oil reservoir
7 2810-2812 32.825 51.90 0.656 Oil reservoir
8 X3 2832-2835 21.306 53.88 0.705 Oil reservoir
9 2838-2840 26.264 47.44 0.712 Oil reservoir
10 2844-2846 54.715 55.10 0.709 Oil reservoir
11 X4 2815-2818 16.014 55.57 0.684 Oil reservoir
12 2820-2823 26.825 54.71 0.778 Oil reservoir
13 X10 2862-2865 19.751 55.47 0.747 Oil reservoir
14 2869-2871 39.118 54.66 0.776 Oil reservoir
15 X16 2865-2867 26.966 54.33 0.810 Oil reservoir
16 2871-2875 27.492 54.33 0.741 Oil reservoir
17 X18 2848-2850 24.523 55.76 0.758 Oil reservoir
18 2852-2856 34.604 55.65 0.695 Oil reservoir
19 2859-2863 14.382 53.24 0.689 Oil reservoir
20 2865-2868 15.864 57.43 0.673 Oil reservoir
21 X1 1860-1862 37.726 98.43 0.752 Gas-bearing formation
22 1865-1868 36.342 98.48 0.852 Gas-bearing formation
23 X2 1869-1872 29.846 91.00 0.689 Gas-bearing formation
24 1875-1878 33.033 93.80 0.695 Gas-bearing formation
25 1879-1882 18.360 91.00 0.785 Gas-bearing formation
26 X3 1856-1858 48.455 99.77 0.725 Gas-bearing formation
27 1860-1865 29.922 92.13 0.752 Gas-bearing formation
28 1868-1870 36.792 94.77 0.845 Gas-bearing formation
29 X4 1835-1838 22.840 97.19 0.783 Gas-bearing formation
30 1840-1843 12.240 97.56 0.854 Gas-bearing formation
31 X5 1825-1828 23.440 97.13 0.765 Gas-bearing formation
32 1830-1832 42.400 96.86 0.778 Gas-bearing formation
33 1835-1839 30.950 93.66 0.769 Gas-bearing formation
34 X6 1869-1872 83.183 90.96 0.862 Gas-bearing formation
35 1875-1879 42.686 91.21 0.774 Gas-bearing formation
36 1882-1885 38.759 94.40 0.851 Gas-bearing formation
37 X8 1872-1875 33.512 92.96 0.779 Gas-bearing formation
38 1880-1883 52.485 95.42 0.768 Gas-bearing formation
39 X15 1866-1869 63.123 95.34 0.796 Gas-bearing formation
40 1874-1876 68.270 95.75 0.832 Gas-bearing formation
41 X1 2885-2889 0.807 92.91 0.669 Water layer
42 2891-2895 1.537 92.78 0.394 Water layer
43 X3 2860-2863 2.841 93.41 0.423 Water layer
44 2865-2869 1.990 93.22 0.364 Water layer
45 2871-2875 3.586 88.20 0.642 Water layer
46 X5 2836-2838 3.547 87.45 0.553 Water layer
47 2851-2855 3.437 86.75 0.581 Water layer
48 2860-2865 3.437 88.58 0.621 Water layer
49 X9 2870-2874 2.993 87.84 0.456 Water layer
50 2876-2880 1.377 85.50 0.665 Water layer
51 2885-2888 2.464 84.48 0.642 Water layer
52 X15 2906-2910 2.798 84.48 0.456 Water layer
53 2912-2915 2.498 85.95 0.555 Water layer
54 2920-2923 1.529 79.89 0.523 Water layer
55 X17 2759-2762 1.080 92.13 0.468 Water layer
56 2765-2769 1.523 91.70 0.586 Water layer
57 2771-2775 1.767 88.17 0.350 Water layer
58 X20 2854-2856 2.770 91.18 0.512 Water layer
59 2860-2865 3.037 88.58 0.542 Water layer
60 2868-2870 1.200 86.34 0.468 Water layer
As 31 be X Region of Oil-gas water layer starry sky logging explanation plates in Fig. 1.X-axis is total hydrocarbon, and scale is 0-100, single Position %；Y-axis is methane, and scale is 0-100, unit %；Z axis is TPI, scale 0-1, dimensionless.
Second step is surveyed according to gas shows that active, sieve residue log is shown in that fluorescence, oil stain, oil mark are shown, sidewall coring is shown in fluorescence, oil Spot, oil immersion show etc. that log data shows feature, the contrast district interpretation layer criteria for classifying, identify 1 in well section 1954-1991m, 2nd, 3 totally 3 interpretation layers.
3rd step interpretation layer 1, well section 1954-1960m, thickness 6m, total hydrocarbon show value reaches as shown in Fig. 14 36.72%；Methane is 96.12%, as shown in Fig. 17；TPI is 0.886, as shown in Fig. 1 22；28 in sieve residue log such as Fig. 1 It is shown, it is fluorescence packsand；Sidewall coring is fluorescence packsand as shown in Fig. 1 25.Spheroid is in gas-bearing formation in starry sky plate Region.
Further explanation layer 2, well section 1972-1976m, thickness 4m, total hydrocarbon show value reaches as shown in Fig. 15 22.56%；Methane is 46.53%, as shown in Fig. 18；TPI is 0.812, as shown in Fig. 1 23；29 in sieve residue log such as Fig. 1 It is shown, it is oil mark packsand；Sidewall coring is oil immersion packsand as shown in Fig. 1 26.Spheroid is in oil reservoir in starry sky plate Region.
Further explanation layer 3, well section 1989-1991m, thickness 2m, total hydrocarbon show value reaches as shown in Fig. 16 5.86%；Methane is 81.54%, as shown in Fig. 19；TPI is 0.521, as shown in Fig. 1 24；30 in sieve residue log such as Fig. 1 It is shown, it is fluorescence packsand；Sidewall coring is oil mark packsand as shown in Fig. 1 27.Spheroid is in water layer in starry sky plate Region.
4th step is according to log datas such as total hydrocarbon show value, hydrocarbon component composition, rock pyrolysis analysis parameters, and calmodulin binding domain CaM is special Levy, interpretation layer 1 is evaluated as gas-bearing formation, interpretation layer 2 is evaluated as oil reservoir, and interpretation layer 3 is evaluated as water layer.
5th step interpretation layer is verified
1. interpretation layer 1, explains well section 1954-1960m, logging explanation is oil reservoir；Formation testing well section 1954.2-1961m, puts Spray, daily gas 55680m3, daily gas 3000m of the gas production more than well depth 1000-2000m3Industrial gas standard, formation testing result is Gas-bearing formation, coincide with logging explanation conclusion.
2. interpretation layer 2, explains well section 1972-1976m, logging explanation is oil reservoir；Formation testing well section 1973-1976.8m, takes out Draw, day oil-producing 20.6m3, day oil-producing 1.0m of the oil production more than 1000-2000m3Optimization for industry, formation testing result for oil Layer, coincide with logging explanation conclusion.
2. interpretation layer 3, explains well section 1989-1991m, logging explanation is water layer；Formation testing well section 1989.2-1991.4m, takes out Draw, daily output water 12.4m3, formation testing result is water layer, is coincide with logging explanation conclusion.
In summary, present disclosure is not limited in the above embodiments, and the knowledgeable people in same area can Can propose other embodiments easily within the technological guidance's thought of the present invention, but this embodiment is included in this hair Within the scope of bright.

Claims (2)

1. a kind of oil-gas-water layer well logging starry sky explanation evaluating method, it is characterised in that comprise the following steps：
The first step sets up X, Y, Z 3 D stereo coordinate system；
Second step chooses oil gas water sensitive parameter and represents each reference axis respectively；
(1) oil gas water sensitive parameter chooses total hydrocarbon in gas logging, methane percentage contents, rock pyrolysis analysis TPI；
A. sample point hydrocarbon total amount, hydrocarbon total amount=C1+C2+C3+iC4+nC4+iC5+nC5 are calculated；
B. methane percentage contents=methane content/hydrocarbon total amount × 100%；
C. rock pyrolysis analysis TPI chooses sidewall coring or core analysis data；
(2) X-axis is total hydrocarbon, and Y-axis is methane, and Z axis is TPI；
3rd step in a coordinate system crosses the sample point total hydrocarbon, methane, TPI data of a certain regional formation testing confirmation, Joint occurs in the form of spheroid, and fluid of different nature is represented with different colors, determines the sky residing for oil-producing Gas-Water Contant Between position, i.e. value space；
4th step is needing the relevant parameter of interpretation layer to cross in a coordinate system, according to the locus residing for the spheroid that crosses Qualitative evaluation is carried out to its fluid properties.
2. oil-gas-water layer well logging starry sky explanation evaluating method according to claim 1, it is characterised in that in the 4th step Qualitative evaluation：Spheroid is construed to oil reservoir in oil reservoir georeferencing regionalism, and spheroid is in gas-bearing formation georeferencing regionalism Gas-bearing formation is construed to, spheroid is construed to water layer in water layer georeferencing regionalism.
CN201710426025.1A 2017-06-08 2017-06-08 A kind of oil-gas-water layer well logging starry sky explanation evaluating method Pending CN107060748A (en)

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