CN106066492B - The bearing calibration that a kind of nuclear magnetic resonance log porosity echo sounding influences - Google Patents
The bearing calibration that a kind of nuclear magnetic resonance log porosity echo sounding influences Download PDFInfo
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- CN106066492B CN106066492B CN201610402156.1A CN201610402156A CN106066492B CN 106066492 B CN106066492 B CN 106066492B CN 201610402156 A CN201610402156 A CN 201610402156A CN 106066492 B CN106066492 B CN 106066492B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/28—Processing seismic data, e.g. analysis, for interpretation, for correction
- G01V1/36—Effecting static or dynamic corrections on records, e.g. correcting spread; Correlating seismic signals; Eliminating effects of unwanted energy
- G01V1/362—Effecting static or dynamic corrections; Stacking
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/088—Investigating volume, surface area, size or distribution of pores; Porosimetry
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V2210/00—Details of seismic processing or analysis
- G01V2210/60—Analysis
- G01V2210/61—Analysis by combining or comparing a seismic data set with other data
- G01V2210/616—Data from specific type of measurement
- G01V2210/6169—Data from specific type of measurement using well-logging
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V2210/00—Details of seismic processing or analysis
- G01V2210/60—Analysis
- G01V2210/62—Physical property of subsurface
- G01V2210/624—Reservoir parameters
- G01V2210/6244—Porosity
Abstract
The invention discloses the bearing calibrations that a kind of nuclear magnetic resonance log porosity echo sounding influences, and comprise the following steps：S1, research area's target well section NMR logging data is obtained, solution volume is carried out to log data, read measurement pattern and echo sounding, the porosity of well logging condition is obtained by inverting；S2, drilling and coring delivery is carried out to target well section, carries out laboratory rock core routine porosity measurement after pretreatment；Carry out laboratory NMR porosity under different echo soundings after S3, saturated core to measure；S4, NMR porosity and the scale relation of conventional porosity under the conditions of different echo soundings are established；S5, echo sounding when obtaining logging operation according to step S1, and the scale relation established according to step S4 carries out the correction that nuclear magnetic resonance log porosity echo sounding influences.Porosity is less than normal caused by the present invention can influence echo sounding is corrected, the total porosity after being corrected, and improves the computational accuracy of nuclear magnetic resonance log porosity.
Description
Technical field
The present invention relates to a kind of well logging porosity bearing calibrations, concretely relate to a kind of complexity based on drilling core graduation
The bearing calibration that sandstone nuclear magnetic resonance log porosity echo sounding influences, belongs to oil exploration and development fields.
Background technology
Compared with other Log Methods, the signal of proton, can obtain in nuclear magnetic resonance log direct detection stratum
Extensive concern is obtained to geologic parameters such as formation porosity, permeability and fluid components, efficiently solves many complicated storages
The logging evaluation problem of layer.
Nuclear Magnetic Resonance Measurement be nuclear spin signal improved relaxation behavior, and the relaxation signals of these nuclear magnetic resonance are subject to hole
The influence of the factors such as clearance flow volume property, pore structure, instrument acquisition parameter.Wherein, echo sounding TE is to influence nuclear magnetic resonance to survey
The important parameter of well application effect has been numerous studies, Xiao for influence of the echo sounding to NMR porosity both at home and abroad
Resolve etc. to test under different echo soundings for terrestrial facies argillaceous sandstone sample and show that echo sounding is bigger, NMR porosity
It is bigger with conventional porosity error, this is because when echo sounding is larger, meeting missing part short relaxation component information causes core
Magnetic resonance porosity is less than normal.In this regard, Xiao Lizhi etc. suggests that, to domestic Continental Reservoir, nuclear magnetic resonance apparatus measurement echo sounding takes
0.3ms.The echo sounding of laboratory rock core nuclear magnetic resonance experiment can set below 0.2ms at present, and domestic outer core
Magnetic resonance well logging echo sounding is mostly higher than 0.6ms, by taking Halliburton Company's MRIL-Prime NMR logging instruments as an example,
Shortest echo sounding is the 0.6ms of PR groups in measurement pattern, still greater than the attainable minimum of laboratory rock core nuclear magnetic resonance institute
Echo sounding.
The content of the invention
It is an object of the invention to provide the bearing calibrations that a kind of nuclear magnetic resonance log porosity echo sounding influences.
The adopted technical solution is that：
The bearing calibration that a kind of nuclear magnetic resonance log porosity echo sounding influences, comprises the following steps：
S1, research area's target well section NMR logging data is obtained, solution volume is carried out to log data, read measurement pattern
And echo sounding, the porosity of well logging condition is obtained by inverting；
S2, drilling and coring delivery is carried out to target well section, carries out laboratory rock core routine porosity measurement after pretreatment；
Carry out laboratory NMR porosity under different echo soundings after S3, saturated core to measure；
The nuclear-magnetism experimental data measured under the conditions of S4, the different echo soundings of analysis, establishes core under the conditions of different echo soundings
The scale relation of magnetic resonance porosity and conventional porosity；
S5, according to step S1 obtain logging operation when echo sounding, and according to the scale relation that step S4 is established into
The correction that row nuclear magnetic resonance log porosity echo sounding influences.
Preferably, in step S1：Multi-exponential Inversion is carried out to NMR logging data and obtains the hole under well logging condition
Degree, the porosity refer to influencing the nuclear magnetic resonance log total porosity of correction without echo sounding.
Preferably, in step S3：The setting of echo sounding includes echo sounding used in well-log information and rock core nuclear-magnetism is total to
Shake the echo sounding of experimental analysis.
Preferably, in step S3：Salt water salinity used in saturated core is consistent with salinity in regional water analysis data.
Preferably, in step S4：Compare the rock core NMR porosity and routine measured under the conditions of different echo soundings
Porosity is established NMR porosity and the scale relation of conventional porosity under the conditions of different echo soundings, is intended by data
Conjunction obtains the NMR porosity correction coefficient under different echo soundings.
Preferably, in step S5：Echo sounding during according to obtained logging operation finds and is corresponded in step S4 between echo
The correction coefficient of NMR porosity under the conditions of, so as to which the nuclear magnetic resonance log porosity to gained in step S1 returns
Wave spacing influences correction, the porosity after being corrected.
The method have the benefit that：
Porosity is less than normal caused by the present invention can influence echo sounding is corrected, the total porosity after being corrected,
The computational accuracy of nuclear magnetic resonance log porosity is improved, is accurately calculated for the nuclear magnetic resonance log porosity of Complicated Sandstone Reservoirs
It is of great significance.
Description of the drawings
Fig. 1 is the flow diagram that the present invention carries out nuclear magnetic resonance log porosity echo sounding influence correction；
Fig. 2 is that somewhere target well section tests rock sample rock core nuclear magnetic resonance under different echo soundings in the embodiment of the present invention
Porosity and conventional porosity comparison diagram；Echo sounding TE=0.2ms, Fig. 2 c in echo sounding TE=0.1ms in Fig. 2 a, Fig. 2 b
It is returned in middle echo sounding TE=0.3ms, Fig. 2 d in echo sounding TE=0.6ms, Fig. 2 e in echo sounding TE=0.9ms, Fig. 2 f
Wave spacing TE=1.2ms；
Fig. 3 is somewhere target well section rock sample NMR porosity correction coefficient statistical chart in the embodiment of the present invention；
Fig. 4 is somewhere target well section rock sample nuclear magnetic resonance experiment porosity correction design sketch in the embodiment of the present invention；Figure
Echo sounding TE=1.2ms in echo sounding TE=0.9ms in 4a, Fig. 4 b；
Fig. 5 is somewhere target well section nuclear magnetic resonance log porosity correction design sketch in the embodiment of the present invention.
Specific embodiment
The present invention is primarily to solve to cause part short relaxation component since echo sounding is excessive in nuclear magnetic resonance log
Leakage so that the problem of nuclear magnetic resonance log total porosity is less than normal is the complicated sandstone core based on drilling core graduation by this method
The bearing calibration that magnetic resonance well logging porosity echo sounding influences, porosity is less than normal caused by being influenced on echo sounding carries out school
Just, the total porosity after being corrected improves the computational accuracy of nuclear magnetic resonance log porosity.
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings：
As shown in Figure 1, what a kind of complicated sandstone nuclear magnetic resonance log porosity echo sounding based on drilling core graduation influenced
Bearing calibration comprises the following steps：
S1, research area's target well section NMR logging data is obtained, solution volume is carried out to log data, read measurement pattern
And echo sounding, it obtains regarding total porosity under well logging condition by multi-exponential Inversion.In Fig. 5 the 5th dotted line show without
The nuclear magnetic resonance log total porosity of correction, compared with Physical Property Analysis porosity, nuclear magnetic resonance total porosity at this time is substantially inclined
It is small, it is necessary to carry out corresponding correction process.
S2, drilling and coring delivery is carried out to target well section, obtains conglomerate, seriate sandstone and packsand rock core, opened after pretreatment
Open up laboratory rock core routine porosity measurement.
S3, according to research area's target well section formation water salinity data, prepare with study area's formation water salinity it is consistent
20000ppm sodium chloride solutions carry out nuclear magnetic resonance rock core measurement in laboratory after saturated core.Research area's target well section nuclear-magnetism is total to
The well logging echo sounding used that shakes is 0.9ms, laboratory rock core nuclear magnetic resonance experiment echo sounding select respectively 0.1ms, 0.2ms,
0.3ms, 0.6ms, 0.9ms, 1.2ms, stand-by period select 6s, echo number 4096, scanning times 128 times.Fig. 2 is shown not
With rock core NMR porosity under the conditions of echo sounding and conventional porosity measurement result.
S4, according to rock core NMR porosity under the conditions of the different echo soundings of above-mentioned gained and conventional porosity measurement
As a result, when echo sounding is when within 0.3ms, rock core NMR porosity and conventional porosity are basically identical, need not be into
Row correction, but when echo sounding is larger, there is trend less than normal, as echo sounding increases, nuclear-magnetism in NMR porosity
The increasing and different lithology of the deviation of resonance porosity and conventional porosity is different by echo sounding effect,
The correction coefficient of NMR porosity under the conditions of different echo soundings is established by lithology accordingly by regression analysis.Fig. 3 is to grind
Study carefully NMR porosity correction coefficient of the rock core of the three kinds of lithology in area under the conditions of different echo soundings.
Correction coefficient under the conditions of S5, the different echo soundings established according to step S4, to rock core nuclear magnetic resonance experiment
Porosity is corrected, and Fig. 4 is the rock core nuclear magnetic resonance under 0.9ms and 1.2ms echo soundings respectively in the embodiment of the present invention
Porosity calibration result figure is tested, compared with before correction in Fig. 2, the porosity after correction is more nearly with conventional porosity, greatly
The big accuracy for improving rock core NMR porosity.This research area target well is obtained according to nuclear magnetic resonance log firsthand information
Section well logging echo sounding used is 0.9ms, according to target well section surveys well logging lithologic analysis as a result, being established according to step S4
The correction coefficient of different lithology is corrected to obtain to target well section nuclear magnetic resonance log porosity under the conditions of 0.9ms echo soundings
Porosity after correction.The 5th target well section nuclear magnetic resonance shown in solid for after being corrected in the embodiment of the present invention is surveyed in Fig. 5
Wellhole porosity, wherein it is conglomerate that 102 and No. 103 floor, which survey well logging Lithology Discrimination result, echo sounding 0.9ms corresponds to step S4 institutes
The correction coefficient of foundation is 1.15, and calibrated rear NMR porosity is more nearly with Physical Property Analysis porosity, and accuracy obtains
To significantly improving.
Certainly, described above is only the embodiment of the present invention, is not intended to limit the invention, for the technology of this field
For personnel, the invention may be variously modified and varied.It should be noted that any those skilled in the art are at this
Under the guidance of specification, all equivalent substitutes, apparent variant and improvement for being made etc. all fall within the essence of this specification
Within the scope of, it ought to be protected be subject to the present invention.
Claims (1)
1. the bearing calibration that a kind of nuclear magnetic resonance log porosity echo sounding influences, it is characterised in that comprise the following steps：
S1, research area's target well section NMR logging data is obtained, solution volume is carried out to log data, read measurement pattern and returned
Wave spacing obtains the porosity of well logging condition by inverting；
S2, drilling and coring delivery is carried out to target well section, carries out laboratory rock core routine porosity measurement after pretreatment；
Carry out laboratory NMR porosity under different echo soundings after S3, saturated core to measure；
The nuclear-magnetism experimental data measured under the conditions of S4, the different echo soundings of analysis, nuclear-magnetism is total under the conditions of establishing different echo soundings
It shakes the scale relation of porosity and conventional porosity；
S5, echo sounding when obtaining logging operation according to step S1, and the scale relation established according to step S4 carries out core
The correction that magnetic resonance well logging porosity echo sounding influences；
In step S1：Multi-exponential Inversion is carried out to NMR logging data and obtains the porosity under well logging condition, the porosity
Refer to influencing the nuclear magnetic resonance log total porosity of correction without echo sounding；
In step S3：The setting of echo sounding includes the echo sounding and rock core nuclear magnetic resonance experiment analysis use used in well-log information
Echo sounding；Salt water salinity used in saturated core is consistent with salinity in regional water analysis data；
In step S4：The rock core NMR porosity measured under the conditions of different echo soundings and conventional porosity are compared, is established
NMR porosity and the scale relation of conventional porosity under the conditions of different echo soundings are fitted to obtain different return by data
NMR porosity correction coefficient under wave spacing；
In step S5：Echo sounding during according to obtained logging operation finds and core under the conditions of echo sounding is corresponded in step S4
The correction coefficient of magnetic resonance porosity, so as to carry out echo sounding influence to the nuclear magnetic resonance log porosity of gained in step S1
Correction, the porosity after being corrected.
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106383365B (en) * | 2016-10-28 | 2019-03-19 | 中国地质大学（北京） | A method of igneous rock NMR porosity is corrected using plate |
| CN106930754A (en) * | 2017-04-20 | 2017-07-07 | 长江大学 | A kind of nuclear magnetic resonance log collecting method of reservoir self adaptation |
| CN108873082B (en) * | 2018-05-08 | 2019-11-05 | 中国石油大学(华东) | A kind of compact rock core NMR porosity bearing calibration considering relaxation component section |
| CN109147449B (en) * | 2018-08-10 | 2020-06-09 | 中国石油大学(北京) | Simulation method and device for nuclear magnetic resonance vibration and rotation while drilling |
| CN109031437B (en) * | 2018-08-10 | 2020-01-31 | 中国石油大学(北京) | Method and device for correcting nuclear magnetic resonance spin echo while drilling |
| CN110410058B (en) * | 2019-06-20 | 2023-01-31 | 中国石油化工集团有限公司 | Method for correcting core experiment result scale two-dimensional nuclear magnetic logging |
| CN111220522A (en) * | 2019-10-28 | 2020-06-02 | 中国石油大学(华东) | Core scale logging calculation method for hydrate saturation of high-argillaceous fine-grained sediment |
| CN111350490B (en) * | 2020-03-16 | 2023-11-28 | 中国石油天然气集团有限公司 | Stratum true parameter solving method based on logging data |
| CN113588704B (en) * | 2021-08-01 | 2023-10-27 | 西南石油大学 | Nuclear magnetic resonance signal separation method for immiscible fluid in core |
| CN114428049B (en) * | 2021-09-13 | 2022-07-26 | 中国石油化工股份有限公司 | Method for calculating asphalt content of ancient carbonate reservoir |
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