CN110486010B - Reservoir oil-gas content quantitative evaluation method based on gas logging parameters - Google Patents
Reservoir oil-gas content quantitative evaluation method based on gas logging parameters Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000011158 quantitative evaluation Methods 0.000 title claims abstract description 6
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 30
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 30
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 30
- 239000012530 fluid Substances 0.000 claims abstract description 12
- 238000005259 measurement Methods 0.000 claims abstract description 8
- 238000007781 pre-processing Methods 0.000 claims abstract description 5
- YBJHBAHKTGYVGT-ZKWXMUAHSA-N (+)-Biotin Chemical compound N1C(=O)N[C@@H]2[C@H](CCCCC(=O)O)SC[C@@H]21 YBJHBAHKTGYVGT-ZKWXMUAHSA-N 0.000 claims description 16
- FEPMHVLSLDOMQC-UHFFFAOYSA-N virginiamycin-S1 Natural products CC1OC(=O)C(C=2C=CC=CC=2)NC(=O)C2CC(=O)CCN2C(=O)C(CC=2C=CC=CC=2)N(C)C(=O)C2CCCN2C(=O)C(CC)NC(=O)C1NC(=O)C1=NC=CC=C1O FEPMHVLSLDOMQC-UHFFFAOYSA-N 0.000 claims description 16
- 238000004364 calculation method Methods 0.000 claims description 6
- NNPPMTNAJDCUHE-UHFFFAOYSA-N isobutane Chemical compound CC(C)C NNPPMTNAJDCUHE-UHFFFAOYSA-N 0.000 description 3
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- QWTDNUCVQCZILF-UHFFFAOYSA-N isopentane Chemical compound CCC(C)C QWTDNUCVQCZILF-UHFFFAOYSA-N 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- JXSJBGJIGXNWCI-UHFFFAOYSA-N diethyl 2-[(dimethoxyphosphorothioyl)thio]succinate Chemical compound CCOC(=O)CC(SP(=S)(OC)OC)C(=O)OCC JXSJBGJIGXNWCI-UHFFFAOYSA-N 0.000 description 1
- AFABGHUZZDYHJO-UHFFFAOYSA-N dimethyl butane Natural products CCCC(C)C AFABGHUZZDYHJO-UHFFFAOYSA-N 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000001282 iso-butane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 239000001294 propane Substances 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
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Abstract
The invention discloses a reservoir oil and gas content quantitative evaluation method based on gas logging parameters, which comprises the following steps: 1) Preprocessing gas measurement data: to C 1 To C 5 All hydrocarbon component values plus 0.1ppm; 2) Two derived parameters are defined: oil gas index Y = (4C) 4 +5C 5 )/(C 1 +2C 2 ) Oil gas index Z = (C) 4 +C 5 )/(C 1 +C 2 (ii) a 3) Respectively utilizing oil gas index Y and oil gas index Z and heavy component C in gas-measuring hydrocarbon component 3 And C 4 +C 5 Respectively carrying out rendezvous to obtain 4 rendezvous factors S 1 、S 2 、S 3 And S 4 (ii) a 4) Calculating the abundance S of the oil gas by using 4 cross factors H (ii) a 5) Using S based on oil-gas abundance H The reservoir fluid quantitative interpretation criteria of (1) lead to an interpretation conclusion. The method is suitable for different stratums and different oil types, and mainly considers the thickness of the reservoir and the abundance S of oil and gas H The size and the explanation process are simple and efficient.
Description
Technical Field
The invention relates to the field of interpretation of oil and gas content of a gas logging reservoir, in particular to a method for quantitatively evaluating the oil and gas content of the reservoir by using gas logging parameters and derivative parameters thereof, which is suitable for conventional gas logging and Flair logging.
Background
The gas logging measurement data mainly comprise gas total content (Tg) and methane (C) 1 ) Ethane (C) 2 ) Propane (C) 3 ) Isobutane (iC) 4 ) N-butane (nC) 4 ) Isopentane (iC) 5 ) And n-pentane (nC) 5 ) And gaseous hydrocarbon composition data. The hydrocarbon component value measured by gas logging is the volume concentration of the hydrocarbon component removed from the drilling fluid in the mixed gas, and the reservoir fluid property can be qualitatively explained by establishing an explanation plate by using gas logging parameters, but at present, a method for directly and quantitatively calculating the oil-gas abundance of a reservoir by using the logging parameters does not exist. The patent of the application provides a reservoir oil-gas abundance quantitative calculation method based on a gas measurement parameter and derivative parameter intersection model, and the process for quantitatively evaluating the oil-gas abundance of the reservoir by using the method is simple and efficient. Similar articles and patents have not been found from the currently searched references.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a reservoir oil-gas content quantitative evaluation method based on gas logging parametersObtaining a parameter oil-gas abundance S capable of quantitatively evaluating the oil-gas content of the reservoir according to the mathematical relationship between the intersection characteristics of the derived parameters and the oil-gas abundance of the reservoir H And establishing a gas abundance S based on oil and gas H The reservoir oil-gas-containing quantitative interpretation standard improves the rapid evaluation efficiency and the coincidence rate of reservoir fluid logging.
The purpose of the invention is realized by the following technical scheme:
a reservoir oil-gas content quantitative evaluation method based on gas logging parameters comprises the following steps:
(1) Preprocessing gas measurement data: to C 1 To C 5 All hydrocarbon component values plus 0.1ppm;
(2) Two derived parameters are defined: oil gas index Y = (4C) 4 +5C 5 )/(C 1 +2C 2 ) Oil gas index Z = (C) 4 +C 5 )/(C 1 +C 2 )；
(3) Respectively utilizing oil gas index Y and oil gas index Z and heavy component C in gas-measuring hydrocarbon component 3 And C 4 +C 5 Respectively carrying out rendezvous to obtain 4 rendezvous factors S 1 、S 2 、S 3 And S 4 (ii) a The calculation method of the rendezvous factor comprises the following steps:
(1) oil gas index Y and hydrocarbon component C 3 Crossing to obtain a crossing factor S 1 ：S 1 ＝(C 3 -Y)/C 3 *100％；
(2) Oil gas index Y and hydrocarbon component C 4 +C 5 Crossing to obtain a crossing factor S 2 ：S 2 ＝(C 4 +C 5 -Y)/(C 4 +C 5 )*100％；
(3) Oil gas index Z and hydrocarbon component C 3 Crossing to obtain a crossing factor S 3 ：S 3 ＝(C 3 -Z)/C 3 *100％；
(4) Oil gas index Z and hydrocarbon component C 4 +C 5 Crossing to obtain a crossing factor S 4 ：S 4 ＝(C 4 +C 5 -Z)/(C 4 +C 5 )*100％；
(4) Using 4 cross-talk factors to calculateAbundance of oil and gas S H And calculating a formula: s. the H ＝(S 1 +S 2 +S 3 +S 4 )/4；
(5) Using S based on richness of oil gas H The reservoir fluid quantitative interpretation criteria of (a) to arrive at an interpretation conclusion in which a combination of C is required to distinguish between oil and gas layers 1 /C 3 A ratio.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
1. the invention utilizes the change characteristic relation of the gas-measuring hydrocarbon components and the derivative parameters (oil-gas index Y and oil-gas index Z) thereof on the reservoir profile to establish a curve intersection model and directly obtain the parameter oil-gas abundance S capable of quantitatively evaluating the oil-gas content of the reservoir H And establishing a gas abundance based on S H Compared with a qualitative interpretation method, the reservoir oil-gas-containing interpretation quantitative standard greatly reduces the influence of artificial subjective factors on reservoir fluid interpretation, and improves the objectivity and accuracy of reservoir fluid interpretation.
2. The traditional gas measurement data interpretation method and a plate can only qualitatively interpret the change of reservoir fluid, the method and the standard difference of different stratums and different types of oiliness are large, and meanwhile, the qualitative interpretation has more influence factors, large application difficulty and low accuracy. The method is suitable for different stratums and different oil types, and the reservoir thickness and the oil-gas abundance S are mainly considered in the same region H The size of the device can accurately distinguish an oil layer, a gas layer, an oil-water layer, an oil-containing water layer, a water layer and the like, and the explanation process is simple and efficient.
Drawings
FIG. 1 is the oil and gas abundance S H Calculating and explaining a flow chart;
FIG. 2 is the abundance S of oil and gas in a display section of oil and gas in a certain well in a certain area in this embodiment H And explain the result chart.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides a method for quantitatively evaluating oil-gas content of a reservoir by using gas logging parameters and derived parameters thereof, which comprises the following steps:
1) Preprocessing gas measurement data: to C 1 To C 5 All hydrocarbon component values plus 0.1ppm;
2) Two derived parameters are defined: oil gas index Y = (4C) 4 +5C 5 )/(C 1 +2C 2 ) Oil gas index Z = (C) 4 +C 5 )/(C 1 +C 2 )；
3) Respectively measuring heavy component C in hydrocarbon components by gas by using oil gas index Y and oil gas index Z 3 And C 4 +C 5 Respectively carrying out intersection to obtain 4 intersection factors S 1 、S 2 、S 3 And S 4 And acquiring data such as the depth and the thickness of the top and the bottom of the reservoir by combining the lithological profile.
Wherein the calculation method of the rendezvous factor in the step 3) comprises the following steps:
(1) oil gas index Y and hydrocarbon component C 3 Crossing to obtain a crossing factor S 1 ：S 1 ＝(C 3 -Y)/C 3 *100％
(2) Oil gas index Y and hydrocarbon component C 4 +C 5 Crossing to obtain a crossing factor S 2 ：S 2 ＝(C 4 +C 5 -Y)/(C 4 +C 5 )*100％
(3) Oil gas index Z and hydrocarbon component C 3 Crossing to obtain a crossing factor S 3 ：S 3 ＝(C 3 -Z)/C 3 *100％
(4) Oil gas index Z and hydrocarbon component C 4 +C 5 Crossing to obtain a crossing factor S 4 ：S 4 ＝(C 4 +C 5 -Z)/(C 4 +C 5 )*100％
4) Calculating the abundance S of the oil gas by using 4 cross factors H And obtaining the corresponding oil-gas abundance value by combining the reservoir depth, and calculating a formula: s. the H ＝(S 1 +S 2 +S 3 +S 4 )/4；
5) Using S based on oil-gas abundance H The reservoir fluid quantitative interpretation criteria of (a) lead to an interpretation conclusion.
Specifically, the abundance S of the oil gas in a certain well oil gas display section in a certain area H The calculation of (c) is as an example:
1) Preprocessing gas measurement data: to C 1 To C 5 All hydrocarbon component values plus 0.1ppm;
2) Two derived parameters are defined: oil gas index Y = (4C) 4 +5C 5 )/(C 1 +2C 2 ) Oil gas index Z = (C) 4 +C 5 )/(C 1 +C 2 )；
3) Respectively measuring heavy component C in hydrocarbon components by gas by using oil gas index Y and oil gas index Z 3 And C 4 +C 5 Respectively carrying out intersection to obtain 4 intersection factors S 1 、S 2 、S 3 And S 4 ；
Wherein the method for calculating the rendezvous factor in the step 3) comprises the following steps:
(1) oil gas index Y and hydrocarbon component C 3 Crossing to obtain a crossing factor S 1 ：S 1 ＝(C 3 -Y)/C 3 *100％；
(2) Oil gas index Y and hydrocarbon component C 4 +C 5 Crossing to obtain a crossing factor S 2 ：S 2 ＝(C 4 +C 5 -Y)/(C 4 +C 5 )*100％；
(3) Oil gas index Z and hydrocarbon component C 3 Crossing to obtain a crossing factor S 3 ：S 3 ＝(C 3 -Z)/C 3 *100％；
(4) Oil gas index Z and hydrocarbon component C 4 +C 5 Crossing to obtain a crossing factor S 4 ：S 4 ＝(C 4 +C 5 -Z)/(C 4 +C 5 )*100％；
4) Calculating the abundance S of the oil gas by using 4 cross factors H And calculating the formula: s. the H ＝(S 1 +S 2 +S 3 +S 4 ) (ii)/4; respectively obtaining the abundance S of the oil gas of each oil gas display layer H Drawing a corresponding curve;
5) Utilization of this region based on oil and gas abundance S H The reservoir fluid quantitative interpretation criteria of (2) leads to an interpretation conclusion, wherein distinguishing oil layers from gas layers is requiredTo bind to C 1 /C 3 A ratio; specifically, see table 1 below and fig. 1 and 2 below:
1772.0-1777.0m reservoir S H 57.0% of C 1 /C 3 Greater than 50, interpreted as a gas layer;
1783.0-1786.0m reservoir S H 29.0%, C 1 /C 3 Greater than 50, interpreted as a dry layer;
1786.0-1792.0m reservoir S H 84.0% of C 1 /C 3 Greater than 50, interpreted as a gas layer;
1795.0-1797.0m reservoir S H 70.0% of C 1 /C 3 Less than 50, interpreted as an oil layer;
1798.0-1800.0m reservoir S H 60.0% of C 1 /C 3 Less than 50, interpreted as an oil layer;
1805.0-1808.0m reservoir S H 69.0% by weight, C 1 /C 3 Less than 50, interpreted as an oil layer;
1817.0-1820.0m reservoir S H 14.0% of C 1 /C 3 Less than 50, interpreted as a dry layer;
1830.0-1833.0m reservoir S H 8.0% of C 1 /C 3 Less than 50, interpreted as a dry layer.
TABLE 1
TABLE 1 is the abundance S of a region based on oil and gas H The reservoir fluid quantification interpretation criteria.
The present invention is not limited to the embodiments described above. The foregoing description of the specific embodiments is intended to describe and illustrate the technical solutions of the present invention, and the above specific embodiments are merely illustrative and not restrictive. Those skilled in the art can make many changes and modifications to the invention without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (1)
1. A reservoir oil-gas content quantitative evaluation method based on gas logging parameters is characterized by comprising the following steps:
(1) Preprocessing gas measurement data: to C 1 To C 5 All hydrocarbon component values plus 0.1ppm;
(2) Two derived parameters are defined: oil gas index Y = (4C) 4 +5C 5 )/(C 1 +2C 2 ) Oil gas index Z = (C) 4 +C 5 )/(C 1 +C 2 )；
(3) Respectively utilizing oil gas index Y and oil gas index Z and heavy component C in gas-measuring hydrocarbon component 3 And C 4 +C 5 Respectively carrying out rendezvous to obtain 4 rendezvous factors S 1 、S 2 、S 3 And S 4 (ii) a The calculation method of the rendezvous factor comprises the following steps:
(1) oil gas index Y and hydrocarbon component C 3 Crossing to obtain a crossing factor S 1 ：S 1 ＝(C 3 -Y)/C 3 *100％；
(2) Oil gas index Y and hydrocarbon component C 4 +C 5 Crossing to obtain a crossing factor S 2 ：S 2 ＝(C 4 +C 5 -Y)/(C 4 +C 5 )*100％；
(3) Oil gas index Z and hydrocarbon component C 3 Crossing to obtain a crossing factor S 3 ：S 3 ＝(C 3 -Z)/C 3 *100％；
(4) Oil gas index Z and hydrocarbon component C 4 +C 5 Crossing to obtain a crossing factor S 4 ：S 4 ＝(C 4 +C 5 -Z)/(C 4 +C 5 )*100％；
(4) Calculation of oil and gas abundance S Using 4 Cross-over factors H And calculating the formula: s H ＝(S 1 +S 2 +S 3 +S 4 )/4；
(5) Using S based on oil-gas abundance H The reservoir fluid quantitative interpretation criteria of (1) lead to an interpretation conclusion.
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