CN108894778A - A method of utilizing gas measuring logging data identification of hydrocarbon laminar flow volume property - Google Patents

A method of utilizing gas measuring logging data identification of hydrocarbon laminar flow volume property Download PDF

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Publication number
CN108894778A
CN108894778A CN201810802902.5A CN201810802902A CN108894778A CN 108894778 A CN108894778 A CN 108894778A CN 201810802902 A CN201810802902 A CN 201810802902A CN 108894778 A CN108894778 A CN 108894778A
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gas
oil
fluid sample
fluid
identification
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CN108894778B (en
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胡向阳
邓勇
梁玉楠
吴健
袁伟
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China National Offshore Oil Corp CNOOC
CNOOC China Ltd Zhanjiang Branch
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China National Offshore Oil Corp CNOOC
CNOOC China Ltd Zhanjiang Branch
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    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B49/00Testing 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
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B49/00Testing 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
    • E21B49/08Obtaining fluid samples or testing fluids, in boreholes or wells
    • E21B49/087Well testing, e.g. testing for reservoir productivity or formation parameters
    • E21B49/088Well testing, e.g. testing for reservoir productivity or formation parameters combined with sampling

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

The invention discloses a kind of methods using gas measuring logging data identification of hydrocarbon laminar flow volume property, include the following steps:Step 1, downhole fluid samples:It is gone into operation using the test of prospect pit oil-gas Layer, sampling and producing well and obtains fluid sample data;Step 2, the determination of fluid sample type:On the basis of high pressure property experimental analysis, fluid Oil-gas Accumulation Types are divided into condensate gas, volatile oil and light oil etc. according to parameters such as gas-oil ratio, oil density, heavy components contents;Step 3, it obtains fluid sample gas and surveys identification parameter:Identification parameter Bh*10+sz-wh, c1/ (c2+c3+c4+c5) are surveyed using the gas that the gas measured data that fluid sample corresponds to depth obtains oil-gas Layer;Step 4, building gas surveys identification plate:It selects that c1/ (c2+c3+c4+c5) is abscissa, Bh*10+sz-wh is ordinate, is plotted in coordinate diagram.Method of the invention can in the case where being sampled without downhole fluid Quick Recognition of Oil And Gas Reservoir, reduce cost of exploration & development.

Description

A method of utilizing gas measuring logging data identification of hydrocarbon laminar flow volume property
Technical field
The invention belongs to oil-gas exploration and development fields, and in particular to a kind of oil gas layer fluid class based on gas measuring logging data Type determines method.
Background technique
THE WESTERN SOUTH CHINA SEA sea area oil gas field fluid properties are complex, and condensate gas, volatile oil and light oil are dispersed on longitudinal direction. Especially when buried depth of strata is larger, temperature, pressure are higher (150 DEG C, 38Mpa), and reservoir properties are poor, and the fluid signal in hole exists It is weaker in log response, it causes oil-gas Layer unobvious in neutron density response difference, is only difficult to identify that condensation with log Gas-bearing formation, volatilization oil reservoir and light oil.
At this stage, oil and gas reservoir types differentiate and are mainly determined by gas survey Triangle Chart and Pixler Chart, but this A little methods have stronger provincialism and biggish limitation, differentiate that error is larger, cannot effectively instruct the exploration of oil gas field with Exploitation, these problems just need to improve traditional technology, then how to invent a kind of utilization gas measuring logging data knowledge The method of other oil-gas Layer fluid properties, this becomes our problems to be solved.
Summary of the invention
The purpose of the present invention is in the above context to solve the problems, such as that oil gas accurately identifies in exploration and development, provides one kind Versatile and high accuracy oil and gas reservoir types determine method, and method of the invention can sampled without downhole fluid In the case of quickly identify, reduce cost of exploration & development.
To solve the above problems, the present invention provides the following technical solutions:It is a kind of to utilize gas measuring logging data identification of hydrocarbon layer The method of fluid properties, includes the following steps:
Step 1, downhole fluid samples:It is gone into operation using the test of prospect pit oil-gas Layer, sampling and producing well and obtains fluid sample number According to;
Step 2, the determination of fluid sample type:It is close according to gas-oil ratio, crude oil on the basis of high pressure property experimental analysis Fluid Oil-gas Accumulation Types are divided into condensate gas, volatile oil and light oil etc. by the parameters such as degree, heavy components content;
Step 3, it obtains fluid sample gas and surveys identification parameter:Oil gas is obtained using the gas measured data that fluid sample corresponds to depth The gas of layer surveys identification parameter Bh*10+sz-wh, c1/ (c2+c3+c4+c5);
Step 4, building gas surveys identification plate:Selecting c1/ (c2+c3+c4+c5) is abscissa, Bh*10+sz-wh is vertical seat Mark, is plotted in coordinate diagram, can mark off condensate gas, volatilization according to the regularity of distribution of the data point of known fluid sample type Oil, light oil distributed area on the unknown well data projection to plate that needs are judged, fall in the stream that section just belongs in section Body type.
As present invention further optimization mode, in step S3, the calculation formula of described Bh, sz, wh are:
C1, c2, c3, c4, c5 are gas detection logging data in formula.
Compared with prior art, beneficial effects of the present invention are as follows:
Method of the invention can significantly improve the precision of oil-gas Layer flow net model, especially determine condensate gas with Volatile oil has stronger adaptability, can effectively solve the hydrocarbon type identification problem of complex fluid property, in exploration and development It plays a significant role, and the present invention compensates for and samples the deficiency for determining that oil and gas reservoir types are at high cost by downhole fluid, realizes In the case where without downhole fluid sampling to oil-gas Layer fluid type it is quick, accurately identify.
Detailed description of the invention
Fig. 1 is flow chart of the invention.
Fig. 2 is gas detection logging identification of hydrocarbon layer plate of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.
This practical invention provides a kind of technical solution referring to FIG. 1-2,:It is a kind of to utilize gas measuring logging data identification of hydrocarbon layer The method of fluid properties, includes the following steps:
Step 1, downhole fluid samples:It is gone into operation using the test of prospect pit oil-gas Layer, sampling and producing well and obtains fluid sample number According to;
Step 2, the determination of fluid sample type:It is close according to gas-oil ratio, crude oil on the basis of high pressure property experimental analysis Fluid Oil-gas Accumulation Types are divided into condensate gas, volatile oil and light oil etc. by the parameters such as degree, heavy components content;
Step 3, it obtains fluid sample gas and surveys identification parameter:Oil gas is obtained using the gas measured data that fluid sample corresponds to depth The gas of layer surveys identification parameter Bh*10+sz-wh, c1/ (c2+c3+c4+c5);
Step 4, building gas surveys identification plate:Selecting c1/ (c2+c3+c4+c5) is abscissa, Bh*10+sz-wh is vertical seat Mark, is plotted in coordinate diagram, can mark off condensate gas, volatilization according to the regularity of distribution of the data point of known fluid sample type Oil, light oil distributed area on the unknown well data projection to plate that needs are judged, fall in the stream that section just belongs in section Body type.
In step S3, the calculation formula of described Bh, sz, wh are:
C1, c2, c3, c4, c5 are gas detection logging data in formula.
Example one
As shown in Figure 1, the method for determining oil and gas reservoir types using gas measuring logging data, it includes the following steps:
Step 1, downhole fluid samples:It is gone into operation using the test of prospect pit oil-gas Layer, sampling and producing well and obtains fluid type sample Product;
Step 2, the determination of fluid sample type:It is close according to gas-oil ratio, crude oil on the basis of high pressure property experimental analysis Fluid gas reservoir types are divided into condensate gas, volatile oil and light oil by the parameters such as degree, heavy components content;
Step 3, it obtains fluid sample gas and surveys identification parameter:Oil gas is obtained using the gas measured data that fluid sample corresponds to depth Layer gas surveys identification parameter Bh*10+sz-wh, c1/ (c2+c3+c4+c5);
The calculation formula of described Bh, sz, wh is:
C1, c2, c3, c4, c5 are gas detection logging data in formula;
Step 4, building gas surveys identification plate:Selecting c1/ (c2+c3+c4+c5) is abscissa, Bh*10+sz-wh is vertical seat Mark, is plotted in coordinate diagram, can mark off condensate gas, volatile oil, lightweight oil distribution according to the regularity of distribution of known data point Section (Fig. 2).On the unknown well data projection to plate that needs are judged, fall in which section just belongs to any fluid class Type.
The gas for having counted different oil-gas Layer fluid types surveys parameter distribution section.Light oil:bh*10+sz-wh<- 155, c1/(c2+c3+c4+c5)<1.1;Volatile oil -155<bh*10+sz-wh<50,1.1<c1/(c2+c3+c4+c5)<3.1;Condensation Gas bh*10+sz-wh>50, c1/ (c2+c3+c4+c5)>3.1.
To sum up, method of the invention can significantly improve the precision of oil-gas Layer flow net model, especially determine solidifying Gassing and volatile oil have stronger adaptability, can effectively solve the hydrocarbon type identification problem of complex fluid property, are exploring It plays a significant role in exploitation, and the present invention compensates for sample by downhole fluid and determines that oil and gas reservoir types are at high cost not Foot, realize without downhole fluid sampling in the case where to oil-gas Layer fluid type it is quick, accurately identify.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention, for this field skill For art personnel, it is clear that invention is not limited to the details of the above exemplary embodiments, and without departing substantially from spirit of the invention or In the case where essential characteristic, the present invention can be realized in other specific forms.Therefore, in all respects, should all incite somebody to action Embodiment regards exemplary as, and is non-limiting, the scope of the present invention by appended claims rather than on state Bright restriction, it is intended that including all changes that fall within the meaning and scope of the equivalent elements of the claims in the present invention It is interior.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art The other embodiments being understood that.

Claims (2)

1. a kind of method using gas measuring logging data identification of hydrocarbon laminar flow volume property, it is characterised in that:Include the following steps:
Step 1, downhole fluid samples:It is gone into operation using the test of prospect pit oil-gas Layer, sampling and producing well and obtains fluid sample data;
Step 2, the determination of fluid sample type:On the basis of high pressure property experimental analysis, according to gas-oil ratio, oil density, Fluid Oil-gas Accumulation Types are divided into condensate gas, volatile oil and light oil etc. by the parameters such as heavy components content;
Step 3, it obtains fluid sample gas and surveys identification parameter:Oil-gas Layer is obtained using the gas measured data that fluid sample corresponds to depth Gas surveys identification parameter Bh*10+sz-wh, c1/ (c2+c3+c4+c5);
Step 4, building gas surveys identification plate:Select that c1/ (c2+c3+c4+c5) is abscissa, Bh*10+sz-wh is ordinate, Be plotted in coordinate diagram, according to the regularity of distribution of the data point of known fluid sample type can mark off condensate gas, volatile oil, Light oil distributed area on the unknown well data projection to plate that needs are judged, falls in the fluid that section just belongs in section Type.
2. a kind of method using gas measuring logging data identification of hydrocarbon laminar flow volume property according to claim 1, feature It is:In step S3, the calculation formula of described Bh, sz, wh are:
C1, c2, c3, c4, c5 are gas detection logging data in formula.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109884135A (en) * 2019-01-08 2019-06-14 中国石油大学(北京) Oil-gas two-phase flow ejector half state characterizing method and device
CN111502650A (en) * 2020-06-30 2020-08-07 中石化胜利石油工程有限公司地质录井公司 Method for identifying condensate gas layer by using gas measurement derived parameters and application thereof
CN113203658A (en) * 2021-04-30 2021-08-03 中海石油(中国)有限公司上海分公司 Reservoir fluid density prediction method
GB2608998A (en) * 2021-07-15 2023-01-25 Equinor Energy As Reservoir fluid typing

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CN109884135A (en) * 2019-01-08 2019-06-14 中国石油大学(北京) Oil-gas two-phase flow ejector half state characterizing method and device
CN109884135B (en) * 2019-01-08 2020-09-25 中国石油大学(北京) Oil-gas two-phase flow pattern representation method and device
CN111502650A (en) * 2020-06-30 2020-08-07 中石化胜利石油工程有限公司地质录井公司 Method for identifying condensate gas layer by using gas measurement derived parameters and application thereof
CN111502650B (en) * 2020-06-30 2020-10-27 中石化胜利石油工程有限公司地质录井公司 Method for identifying condensate gas layer by using gas measurement derived parameters and application thereof
CN113203658A (en) * 2021-04-30 2021-08-03 中海石油(中国)有限公司上海分公司 Reservoir fluid density prediction method
CN113203658B (en) * 2021-04-30 2023-08-29 中海石油(中国)有限公司上海分公司 Reservoir fluid density prediction method
GB2608998A (en) * 2021-07-15 2023-01-25 Equinor Energy As Reservoir fluid typing
GB2608998B (en) * 2021-07-15 2023-09-27 Equinor Energy As Reservoir fluid typing

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