CN114382460A - Logging evaluation method and device for water outlet result of low-permeability and compact gas reservoir - Google Patents
Logging evaluation method and device for water outlet result of low-permeability and compact gas reservoir Download PDFInfo
- Publication number
- CN114382460A CN114382460A CN202210064522.2A CN202210064522A CN114382460A CN 114382460 A CN114382460 A CN 114382460A CN 202210064522 A CN202210064522 A CN 202210064522A CN 114382460 A CN114382460 A CN 114382460A
- Authority
- CN
- China
- Prior art keywords
- water saturation
- core sample
- bound water
- determining
- weak
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 427
- 238000011156 evaluation Methods 0.000 title claims abstract description 30
- 230000008859 change Effects 0.000 claims abstract description 98
- 239000011148 porous material Substances 0.000 claims abstract description 82
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 75
- 238000000034 method Methods 0.000 claims abstract description 46
- 238000004519 manufacturing process Methods 0.000 claims abstract description 26
- 238000003860 storage Methods 0.000 claims description 17
- 238000002474 experimental method Methods 0.000 claims description 15
- 229920006395 saturated elastomer Polymers 0.000 claims description 9
- 238000004590 computer program Methods 0.000 claims description 5
- 239000011230 binding agent Substances 0.000 claims 4
- 238000011161 development Methods 0.000 abstract description 15
- 230000008901 benefit Effects 0.000 abstract description 8
- 239000007789 gas Substances 0.000 description 72
- 230000006870 function Effects 0.000 description 14
- 239000011435 rock Substances 0.000 description 12
- 238000001228 spectrum Methods 0.000 description 12
- 238000006073 displacement reaction Methods 0.000 description 10
- 239000012530 fluid Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 230000035699 permeability Effects 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 4
- 238000009736 wetting Methods 0.000 description 4
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 3
- 229910052753 mercury Inorganic materials 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000011158 quantitative evaluation Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000008398 formation water Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000012565 NMR experiment Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- 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
- E21B47/00—Survey of boreholes or wells
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Landscapes
- 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)
- Geophysics (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The embodiment of the invention discloses a logging evaluation method and device for a water outlet result of a low-permeability and compact gas reservoir. Wherein, the method comprises the following steps: determining pore structure parameters, strong bound water saturation and weak bound water saturation of at least one core sample in a target formation; determining the change trend of the strong bound water saturation and the change trend of the weak bound water saturation of the target stratum according to the strong bound water saturation, the weak bound water saturation and the pore structure parameters of each core sample; and determining the water outlet result of the target stratum according to the strong bound water saturation change trend, the weak bound water saturation change trend and the water saturation change trend of the target stratum. By executing the technical scheme provided by the embodiment of the invention, the fine explanation and evaluation of the low-permeability and compact gas reservoir can be realized, and the method has important guiding significance for the production and development of the gas reservoir, thereby improving the economic benefit.
Description
Technical Field
The embodiment of the invention belongs to the technical field of oil and gas exploration, and particularly relates to a logging evaluation method and device for a water outlet result of a low-permeability and compact gas reservoir.
Background
With the increase of energy demand and the increase of the difficulty of strategy replacement of conventional oil and gas resources along with the social and economic development, the exploration and development of unconventional oil and gas resources become the main melody of the later oil and gas era, and low-permeability and dense gas occupies an extremely important position hidden in unconventional oil and gas.
However, due to the factors of complex mineral components, generally large buried depth, complex diagenesis transformation effect and the like of a reservoir of the low-permeability and compact gas reservoir, the characteristics of poor physical development, strong heterogeneity, complex pore structure and the like of the low-permeability and compact gas reservoir cause the lack of quantitative evaluation of fluid components of the low-permeability and compact gas reservoir in the prior art, so that the water outflow phenomenon of different degrees is very easy to occur in the production and development processes of the low-permeability and compact gas reservoir, the life cycle of the gas reservoir is shortened, and the economic benefit is reduced rapidly.
Disclosure of Invention
The embodiment of the invention provides a logging evaluation method and device for a water outlet result of a low-permeability and compact gas reservoir, which can realize fine interpretation evaluation of the low-permeability and compact gas reservoir, have important guiding significance on production and development of the gas reservoir and further improve economic benefits.
In a first aspect, an embodiment of the present invention provides a well logging evaluation method for a water outlet result of a low-permeability and tight gas reservoir, where the method includes:
determining pore structure parameters, strong bound water saturation and weak bound water saturation of at least one core sample in a target formation; wherein the reservoir type of the target formation comprises at least one of a conventional reservoir, a hypotonic reservoir, and a tight reservoir;
determining the change trend of the strong bound water saturation of the target stratum according to the strong bound water saturation of each core sample and the pore structure parameter of each core sample, and determining the change trend of the weak bound water saturation of the target stratum according to the weak bound water saturation of each core sample and the pore structure parameter of each core sample;
determining a water outlet result of the target stratum according to the strong bound water saturation change trend, the weak bound water saturation change trend and the water saturation change trend of the target stratum; and determining the water saturation change trend of the target stratum according to the closed coring saturation of each core sample.
In a second aspect, an embodiment of the present invention further provides a logging evaluation apparatus for a water outlet result of a low-permeability and tight gas reservoir, the apparatus including: the core sample information determining module is used for determining the pore structure parameter, the strong bound water saturation and the weak bound water saturation of at least one core sample in a target stratum; wherein the reservoir type of the target formation comprises at least one of a conventional reservoir, a hypotonic reservoir, and a tight reservoir;
the irreducible water saturation change trend determination module is used for determining the irreducible water saturation change trend of the target stratum according to the irreducible water saturation of each core sample and the pore structure parameters of each core sample, and determining the weakly irreducible water saturation change trend of the target stratum according to the weakly irreducible water saturation of each core sample and the pore structure parameters of each core sample;
the water outlet result determining module is used for determining the water outlet result of the target stratum according to the strong bound water saturation change trend, the weak bound water saturation change trend and the water saturation change trend of the target stratum; and determining the water saturation change trend of the target stratum according to the closed coring saturation of each core sample.
In a third aspect, an embodiment of the present invention further provides an electronic device, where the electronic device includes:
one or more processors;
a storage device for storing one or more programs,
when executed by the one or more processors, cause the one or more processors to implement a method for well logging evaluation of hypotonic, tight gas reservoir water production results as in any one of the embodiments of the invention.
In a fourth aspect, embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, where the program, when executed by a processor, implements a method for well logging evaluation of water production results of a hypotonic dense gas reservoir according to any one of the embodiments of the present invention.
According to the technical scheme provided by the embodiment of the invention, the pore structure parameter, the strong bound water saturation and the weak bound water saturation of at least one core sample in a target stratum are determined; wherein the reservoir type of the target formation comprises at least one of a conventional reservoir, a hypotonic reservoir, and a tight reservoir; determining the change trend of the strong bound water saturation of the target stratum according to the strong bound water saturation of each core sample and the pore structure parameters of each core sample, and determining the change trend of the weak bound water saturation of the target stratum according to the weak bound water saturation of each core sample and the pore structure parameters of each core sample; determining a water outlet result of the target stratum according to the strong bound water saturation change trend, the weak bound water saturation change trend and the water saturation change trend of the target stratum; wherein the water saturation change trend of the target stratum is determined by the closed coring saturation of each core sample. By executing the technical scheme provided by the embodiment of the invention, the fine explanation and evaluation of the low-permeability and compact gas reservoir can be realized, and the method has important guiding significance for the production and development of the gas reservoir, thereby improving the economic benefit.
Drawings
FIG. 1 is a flow chart of a method for evaluating the water production from a low-permeability, tight gas reservoir according to an embodiment of the present invention;
FIG. 2 is a flow chart of another method for evaluating the water production from a low-permeability tight gas reservoir according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a multi-stage centrifugal nuclear magnetic T2 spectrum of a core sample of a formation according to an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of a strong bound water boundary model and a weak bound water boundary model for a formation according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a logging evaluation apparatus for water yielding results of a low-permeability and tight gas reservoir according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a flowchart of a method for evaluating a water-out result of a hypotonic dense gas reservoir according to an embodiment of the present invention, where the method may be performed by a device for evaluating a water-out result of a hypotonic dense gas reservoir, where the device may be implemented by software and/or hardware, and the device may be configured in an electronic device for evaluating a water-out result of a hypotonic dense gas reservoir. The method is applied to the scene of fine quantitative evaluation of the components of the low-permeability and dense gas reservoir fluid. As shown in fig. 1, the technical solution provided by the embodiment of the present invention specifically includes:
and S110, determining pore structure parameters, strong bound water saturation and weak bound water saturation of at least one core sample in the target stratum.
Wherein the reservoir type of the target formation comprises at least one of a conventional reservoir, a hypotonic reservoir, and a tight reservoir.
The target stratum may be a stratum of the whole well section, the type of the target stratum may be a conventional reservoir in a hypotonic-tight gas reservoir, the type of the target stratum may also be a hypotonic reservoir in a hypotonic-tight gas reservoir, and the type of the target stratum may also be a tight reservoir in a hypotonic-tight gas reservoir. The target formation is composed of a plurality of core samples, and the scheme can determine the pore structure parameters, the strong bound water saturation and the weak bound water saturation of at least one core sample in the target formation. According to the scheme, the physical property experiment can be carried out on the collected rock core samples, the rock core porosity and the permeability of each rock core sample are determined, the actual geological profile of a research area is combined, the experimental data such as the rock core porosity analysis porosity and the permeability are used as calibration, a high-precision porosity and permeability calculation model is constructed, and the square root of the ratio of the permeability of each rock core sample to the rock core porosity is calculated to determine the pore structure parameters of each rock core sample. The strong bound water saturation and the weak bound water saturation of each core sample can be determined by determining the strong capillary pressure and the weak capillary pressure of each core sample after saturated water treatment by adopting a multistage centrifugal force nuclear magnetic experiment, taking the average value of each strong capillary pressure as the average strong capillary pressure of each core sample, taking the average value of each weak capillary pressure as the average weak capillary pressure of each core sample, and determining by using a capillary pressure curve of each core sample, the average strong capillary pressure of each core sample and the average weak capillary pressure of each core sample determined by adopting a capillary pressure experiment.
And S120, determining the change trend of the strong bound water saturation of the target stratum according to the strong bound water saturation of each core sample and the pore structure parameters of each core sample, and determining the change trend of the weak bound water saturation of the target stratum according to the weak bound water saturation of each core sample and the pore structure parameters of each core sample.
Specifically, the method can construct a power function relationship between the strong bound water saturation of each core sample and the pore structure parameters corresponding to each core sample, fit a strong bound water boundary model of the target formation, and determine the change trend of the strong bound water saturation of the target formation according to the strong bound water boundary model. And constructing a power function relationship between the weak bound water saturation of each core sample and the pore structure parameters corresponding to each core sample, fitting a weak bound water boundary model of the target stratum, and determining the change trend of the weak bound water saturation of the target stratum according to the weak bound water boundary model.
And S130, determining the water outlet result of the target stratum according to the strong bound water saturation change trend, the weak bound water saturation change trend and the water saturation change trend of the target stratum.
And determining the water saturation change trend of the target stratum according to the closed coring saturation of each core sample.
According to the method, the water saturation of each core sample can be determined, the actual geological profile of a research area is combined, the core analysis closed coring saturation experimental data are used as calibration, a high-precision water saturation calculation model is constructed based on the calibrated water saturation of each core sample, and then the water saturation change trend of the target stratum is determined. The water production results of the target formation may be a refined evaluation of the fluid composition developed by the target formation gas reservoir and a prediction of the water production. For example, whether the target formation is in the range from a few meters deep to many meters, in this range a pure gas layer or a water-bearing gas layer. If the target formation is a water-bearing gas formation, what type of water the target formation is composed of, for example, whether the target formation is composed of strongly bound water and weakly bound water, or strongly bound water, weakly bound water, and free water, each in what proportion. For a core saturated with water, the water components can be classified into three types through flowability: strongly bound water, weakly bound water and free water. The strong bound water refers to bound water which exists in the interior of a microporous throat, the interior of clay and the surface of rock particles, and the amount of a strong bound water component is related to a pore structure and the component is immovable; the weakly bound water is water components inside small holes, corners and pore throats with poor connectivity, in an actual gas reservoir, the amount of the weakly bound water components is influenced by the pore structure and the size of reservoir forming power, and when the production pressure difference is larger than the reservoir forming power, the components can be produced together with natural gas to cause gas reservoir water outlet; free water is the water component in the coarse throat with well-connected inter-granular pores, and the water component can flow freely under a small pressure difference.
Hypotonic, tight gas occupies an extremely important position in unconventional oil and gas, defined as a natural gas reservoir that exists in low-pore-hypotonic or even tight sandstone reservoirs, has no or very low natural energy production, and requires fracturing or special means to form an industrial gas stream. Due to the factors of complex mineral components of a reservoir, generally large buried depth, complex diagenesis transformation effect and the like, the hypotonic dense gas reservoir has the characteristics of poor physical development, strong heterogeneity, complex pore structure and the like, so that the problems of reservoir omission, pores, seepage, inaccurate saturation, difficult lower physical limit, difficult fluid identification, necessity of innovating and determining a quantitative evaluation method of fluid components and the like exist in well logging interpretation and evaluation, and meanwhile, the water outlet phenomenon of different degrees is very easy to occur in the production and development process of the hypotonic dense gas reservoir, so that the life cycle of the gas reservoir is shortened, and the economic benefit is rapidly reduced.
According to the technical scheme provided by the embodiment of the invention, the pore structure parameter, the strong bound water saturation and the weak bound water saturation of at least one core sample in a target stratum are determined; wherein the reservoir type of the target formation comprises at least one of a conventional reservoir, a hypotonic reservoir, and a tight reservoir; determining the change trend of the strong bound water saturation of the target stratum according to the strong bound water saturation of each core sample and the pore structure parameters of each core sample, and determining the change trend of the weak bound water saturation of the target stratum according to the weak bound water saturation of each core sample and the pore structure parameters of each core sample; determining a water outlet result of the target stratum according to the strong bound water saturation change trend, the weak bound water saturation change trend and the water saturation change trend of the target stratum; wherein the water saturation change trend of the target stratum is determined by the closed coring saturation of each core sample. By executing the technical scheme provided by the embodiment of the invention, the fine explanation and evaluation of the low-permeability and compact gas reservoir can be realized, and the method has important guiding significance for the production and development of the gas reservoir, thereby improving the economic benefit.
Fig. 2 is a flowchart of a well logging evaluation method for water yielding results of a low-permeability and tight gas reservoir according to an embodiment of the present invention, which is optimized based on the above embodiment. As shown in fig. 2, the method for evaluating the water production result of the low-permeability and tight gas reservoir in the embodiment of the present invention may include:
and S210, determining pore structure parameters, strong bound water saturation and weak bound water saturation of at least one core sample in the target stratum.
In this embodiment, the optional determination process of the strong bound water saturation and the weak bound water saturation includes: determining the average strong capillary pressure and the average weak capillary pressure of each core sample; and determining the strong bound water saturation of each core sample under the average strong capillary pressure and the weak bound water saturation under the average weak capillary pressure by adopting a capillary pressure experiment.
For example, the scheme can determine the capillary pressure curve of each core sample by adopting a capillary pressure experiment. The capillary pressure curve of the core sample can show the corresponding relation between the irreducible water saturation of the core sample and each capillary pressure. Therefore, assuming that the average strong capillary pressure determined by the present scheme is 300Psi and the average weak capillary pressure is 100Psi, the present scheme may determine the strong bound water saturation of each core sample at 300Psi and the weak bound water saturation of each core sample at 100 Psi.
According to the scheme, capillary pressure experiments can be carried out after saturated water treatment is carried out on all rock core samples to obtain capillary pressure curves of the rock core samples. Three methods for measuring capillary pressure exist: diaphragm method, mercury pressing method, centrifugal method. The three methods have advantages and disadvantages, and a proper method is selected according to actual conditions when capillary pressure is measured. Compared with other two methods, the separator method experiment is closer to the actual gas reservoir wetting condition, but the maximum breakthrough pressure of the common pore separator is only 0.25MPa, and the common capillary pressure in the actual low-permeability and compact gas reservoir is not reached. Since mercury intrusion methods use mercury-air wetting systems, mercury intrusion capillary pressures are converted to gas-water wetting systems for gas reservoirs before they are used. However, because the interfacial tension and the wetting contact angle of the fluid in the actual gas reservoir are difficult to determine, and the existence of clay bound water in a low-permeability and compact gas reservoir has a large influence on the capillary pressure curve, the capillary pressure obtained by converting the mercury-pressing capillary pressure curve has a certain error with the actual gas reservoir capillary pressure. Capillary pressure measurement by centrifugation is more efficient than the diaphragm method, but is not suitable for measuring rock samples with strong heterogeneity. After a core capillary pressure curve is obtained, the pressures of two strong and weak capillaries with specific sizes are calibrated according to actual production test data and a multistage centrifugal force nuclear magnetic experiment.
Thus, by determining the average strong capillary pressure and the average weak capillary pressure for each core sample; the strong bound water saturation of each core sample under the average strong capillary pressure and the weak bound water saturation of each core sample under the average weak capillary pressure are determined by adopting a capillary pressure experiment, so that the explanation and evaluation of the strong bound water saturation and the weak bound water saturation can be realized, a reliable data source is provided for determining the strong bound water saturation change trend and the weak bound water saturation change trend of a target stratum, and the accurate water outlet result of the target stratum can be further determined.
In this embodiment, optionally, determining the average strong capillary pressure and the average weak capillary pressure of each core sample includes: determining the strong capillary pressure and the weak capillary pressure of each core sample after saturated water treatment by adopting a multistage centrifugal force nuclear magnetic experiment; taking the average value of the strong capillary pressure as the average strong capillary pressure of each core sample; the average value of the weak capillary pressures was taken as the average weak capillary pressure of each core sample.
For example, as shown in fig. 3, the present protocol may perform a multi-stage centrifugal force nmr experiment on each core sample, and measure the nmr T2 spectra of each core sample under saturated water and after centrifugal force displacement of 50, 100, 150, 200, 250, 300, 400, 500 Psi. Observing the change of the T2 spectrum can find that: the peak area of the T2 spectrum of the core sample exhibited a significant decrease as the displacement differential pressure increased. At small pressure differential displacement, there is a significant attenuation in the T2 spectral signal above the cutoff. As the displacement differential pressure is increased to 100-150 Psi, the T2 spectrum which is larger than the cut-off value has no signal basically, and the T2 spectrum signal which is smaller than the cut-off value is weakened to different degrees. The free water component of the rock core sample is preferentially discharged under the action of the smaller displacement pressure difference, the signal of the nuclear magnetic T2 spectrum which is larger than the cut-off value is rapidly weakened, and a small amount of weak bound water component is discharged. As the displacement pressure difference is further increased, the weakly bound water components are further expelled and the signal of the nuclear magnetic T2 spectrum below the cut-off value decreases. When the displacement pressure difference reaches 300Psi, the nuclear magnetic T2 spectrum is basically unchanged, and the T2 spectrum signal reflects the strongly bound water component. Thus, the displacement differential at which the nuclear magnetic T2 spectrum signal of each core sample above the cutoff value decayed to essentially no signal was counted, and the critical displacement differential (i.e., weak capillary pressure) for the multiple core samples was averaged and calibrated to an average weak capillary pressure P1, e.g., 100 Psi. The displacement pressure difference (i.e., strong capillary pressure) at which the nuclear magnetic T2 spectrum of each core sample no longer substantially changed overall was averaged and was designated as the average strong capillary pressure P2, e.g., 300 Psi.
Therefore, strong capillary pressure and weak capillary pressure of each core sample after saturated water treatment are determined by adopting a multistage centrifugal force nuclear magnetic experiment; taking the average value of the strong capillary pressure as the average strong capillary pressure of each core sample; the average value of the weak capillary pressures was taken as the average weak capillary pressure of each core sample. Reliable data sources can be provided for determining the strong and weak bound water saturation change trends of the target formation, and accurate water production results of the target formation can be determined.
And S220, determining a strong bound water boundary model of the target stratum according to the strong bound water saturation of each core sample and the pore structure parameters of each core sample.
Because the pore structure parameters and the strong binding water saturation of each core sample are known, the method can adopt a numerical analysis method to fit the pore structure parameters and the strong binding water saturation of each core sample, and finally obtain a function which can reflect the corresponding relation between the pore structure parameters and the strong binding water saturation of a target stratum.
In one possible embodiment, optionally, determining the strongly bound water boundary model of the target formation according to the strongly bound water saturation of each core sample and the pore structure parameter of each core sample comprises: and fitting the strong bound water saturation of each core sample and the pore structure parameters of each core sample by adopting a power function to determine a strong bound water boundary model of the target stratum.
For example, as shown in fig. 4, in a rectangular coordinate system, each coordinate point represents the strong bound water saturation of a core sample corresponding to the pore structure parameter of the core sample. According to the scheme, the power function can be adopted in the rectangular coordinate system to carry out nonlinear fitting on each coordinate point, and finally the strong restraint reflecting the target stratum is obtainedFunction of water saturation and pore structure parameter relationship, e.g. y-26.207 x-0.285I.e. a strongly bound water boundary model of the target formation.
Thus, a strong bound water boundary model of the target formation is determined by fitting the strong bound water saturation of each core sample and the pore structure parameters of each core sample using a power function. Reliable data sources can be provided for determining the strong bound water saturation change trend of the target stratum, and then accurate water outlet results of the target stratum can be determined.
And S230, determining the strong bound water saturation change trend of the target stratum according to the strong bound water boundary model.
For example, since the strong bound water boundary model of the target formation is known and the pore structure parameters of the target formation are known, the method can determine the strong bound water saturation change trend of the target formation according to the strong bound water boundary model and the pore structure parameters of the target formation.
And S240, determining a weak bound water boundary model of the target stratum according to the weak bound water saturation of each core sample and the pore structure parameters of each core sample.
Because the pore structure parameter and the weak bound water saturation of each core sample are known, the method can adopt a numerical analysis method to fit the pore structure parameter and the weak bound water saturation of each core sample, and finally obtains a function which can reflect the corresponding relation between the pore structure parameter and the weak bound water saturation of a target stratum.
In another possible embodiment, optionally, determining a weakly bound water boundary model of the target formation based on the weakly bound water saturation of each core sample and the pore structure parameter of each core sample includes: and fitting the weak bound water saturation of each core sample and the pore structure parameters of each core sample by adopting a power function to determine a weak bound water boundary model of the target stratum.
For example, as shown in fig. 4, in the orthogonal coordinate system, each coordinate point represents a weak bundle of a core sample corresponding to the pore structure parameter of the core sampleWater saturation. According to the scheme, a power function can be adopted in a rectangular coordinate system to carry out nonlinear fitting on each coordinate point, and finally a relational expression which reflects the relationship between the weak bound water saturation and the pore structure parameter of a target stratum is obtained, for example, y is 34.399x-0.355I.e. a weakly bound water boundary model of the target formation.
Thus, a weakly bound water boundary model of the target formation is determined by fitting the weakly bound water saturation of each core sample and the pore structure parameters of each core sample using a power function. Reliable data sources can be provided for determining the weak bound water saturation change trend of the target stratum, and then accurate water outlet results of the target stratum can be determined.
And S250, determining the weak bound water saturation change trend of the target stratum according to the weak bound water boundary model.
For example, since the weak bound water boundary model of the target formation is known and the pore structure parameters of the target formation are known, the present solution may determine the weak bound water saturation change trend of the target formation according to the weak bound water boundary model and the pore structure parameters of the target formation.
The execution sequence of step S220 and step S240 is not limited, and may be executed simultaneously or sequentially. However, step S230 must be executable after step S220 is completed, and step S250 must be executable after step S240 is completed.
And S260, determining the water outlet result of the target stratum according to the strong bound water saturation change trend, the weak bound water saturation change trend and the water saturation change trend of the target stratum.
The depth range of the target stratum is known, and the method can determine the relative size relation among the strong bound water saturation, the weak bound water saturation and the water saturation in the depth range of the target stratum according to the strong bound water saturation change trend, the weak bound water saturation change trend and the water saturation change trend of the target stratum, so that the water outlet result of the target stratum can be determined.
In yet another possible embodiment, optionally, determining a water production result for the target formation based on the strong bound water saturation tendency, the weak bound water saturation tendency, and the water saturation tendency of the target formation comprises: determining that only strongly irreducible water is included in the target formation if it is determined that the strongly irreducible water saturation of the target formation is greater than or equal to the water saturation of the target formation; or if the water saturation of the target stratum is determined to be larger than the strong irreducible water saturation of the target stratum and the water saturation of the target stratum is less than or equal to the weak irreducible water saturation of the target stratum, determining that the target stratum comprises strong irreducible water and weak irreducible water; or if the water saturation of the target stratum is determined to be larger than the weak bound water saturation of the target stratum, determining that the target stratum comprises strong bound water, weak bound water and free water.
For example, the scheme can represent the strong bound water saturation of the target stratum by Sw2, the weak bound water saturation of the target stratum by Sw1, the water saturation of the target stratum by Swe, and can perform fine evaluation on the fluid components of the target stratum and predict the water outlet condition of the target stratum:
when Swe of the target stratum is less than or equal to Sw2, the target stratum is indicated to have strong reservoir forming power, and only strong bound water components exist. If the water saturation Swe is equivalent to the strong restriction water saturation Sw2, the target formation is a premium gas reservoir. This type of gas reservoir produces no formation water or only trace amounts of condensate water in production development.
When Sw2 of the target stratum is larger than Sw and smaller than or equal to Sw1, the reservoir formation power of the target stratum is slightly weaker than that of a high-quality gas reservoir, the strong bound water component and the weak bound water component exist, the strong bound water saturation is Sw2, and the weak bound water saturation is Swe-Sw 2. The gas reservoir begins to produce water when the flow pressure difference reaches a certain critical pressure value in production and development, the produced water component is a weak bound water component, and the critical pressure value is the size of the reservoir forming power when the gas reservoir is formed. When the differential flow pressure is greater than the reservoir formation power, the connate formation water in the reservoir will be produced along with the natural gas.
When the water saturation of the target stratum is less than 60 percent and Swe is more than Sw1, the target stratum is indicated to have weak reservoir forming power, and a low-gas saturated reservoir with three water components of strong bound water, weak bound water and free water exists. Wherein the strong bound water saturation is Sw2, the weak bound water saturation is Sw1-Sw2, and the free water saturation is Swe-Sw 1. The target stratum is easy to produce water due to insufficient reservoir forming power, basically has no natural productivity under the conditions of low permeability and compactness, and has no development value.
Thus, by determining that only strongly irreducible water is included in the target formation if the strongly irreducible water saturation of the target formation is determined to be greater than or equal to the water saturation of the target formation; or if the water saturation of the target stratum is determined to be greater than the strong bound water saturation of the target stratum and the water saturation of the target stratum is determined to be less than or equal to the weak bound water saturation of the target stratum, determining that the target stratum comprises strong bound water and weak bound water; or if the water saturation of the target stratum is determined to be larger than the weak bound water saturation of the target stratum, determining that the target stratum comprises strong bound water, weak bound water and free water. The method can realize the fine evaluation of the fluid components of the gas reservoir, further improve the water outlet mechanism of the hypotonic-compact gas reservoir, further know the occurrence forms of the fluid components in the hypotonic-compact gas reservoir and the contribution of the fluid components to water outlet, and have important guiding significance for the production and development of the gas reservoir.
According to the technical scheme provided by the embodiment of the invention, the pore structure parameter, the strong bound water saturation and the weak bound water saturation of at least one core sample in a target stratum are determined; determining a strong bound water boundary model of a target stratum according to the strong bound water saturation of each core sample and the pore structure parameters of each core sample; determining a strong bound water saturation change trend of the target stratum according to the strong bound water boundary model; determining a weak bound water boundary model of the target stratum according to the weak bound water saturation of each core sample and the pore structure parameters of each core sample; determining the weak bound water saturation change trend of the target stratum according to the weak bound water boundary model; and determining the water outlet result of the target stratum according to the strong bound water saturation change trend, the weak bound water saturation change trend and the water saturation change trend of the target stratum. By executing the scheme, the method can realize the fine explanation and evaluation of the low-permeability and compact gas reservoir, has important guiding significance on the production and development of the gas reservoir, and further can improve the economic benefit.
Fig. 5 is a schematic structural diagram of a logging evaluation apparatus for water outlet results of a hypotonic dense gas reservoir, which may be configured in an electronic device for logging evaluation of water outlet results of a hypotonic dense gas reservoir, according to an embodiment of the present invention, as shown in fig. 5, the apparatus includes:
a core sample information determination module 310 for determining a pore structure parameter, a strong bound water saturation, and a weak bound water saturation of at least one core sample in a target formation; wherein the reservoir type of the target formation comprises at least one of a conventional reservoir, a hypotonic reservoir, and a tight reservoir;
the irreducible water saturation change trend determining module 320 is used for determining the irreducible water saturation change trend of the target stratum according to the irreducible water saturation of each core sample and the pore structure parameters of each core sample, and determining the weakly irreducible water saturation change trend of the target stratum according to the weakly irreducible water saturation of each core sample and the pore structure parameters of each core sample;
the water outlet result determining module 330 is configured to determine a water outlet result of the target formation according to the strong bound water saturation change trend, the weak bound water saturation change trend and the water saturation change trend of the target formation; and determining the water saturation change trend of the target stratum according to the closed coring saturation of each core sample.
Optionally, the irreducible water saturation trend determining module 320 includes a strong irreducible water boundary model determining unit, configured to determine a strong irreducible water boundary model of the target formation according to the strong irreducible water saturation of each core sample and the pore structure parameter of each core sample; a strong bound water saturation change trend determination unit for determining a strong bound water saturation change trend of the target formation according to the strong bound water boundary model; the weak bound water boundary model determining unit is used for determining a weak bound water boundary model of the target stratum according to the weak bound water saturation of each core sample and the pore structure parameters of each core sample; and the weak bound water saturation change trend determination unit is used for determining the weak bound water saturation change trend of the target stratum according to the weak bound water boundary model.
Optionally, the strong bound water boundary model determining unit is specifically configured to fit the strong bound water saturation of each core sample and the pore structure parameter of each core sample by using a power function to determine the strong bound water boundary model of the target formation.
Optionally, the weak bound water boundary model determining unit is specifically configured to fit the weak bound water saturation of each core sample and the pore structure parameter of each core sample by using a power function to determine the weak bound water boundary model of the target formation.
Optionally, the effluent result determining module 330 is specifically configured to determine that only strongly bound water is included in the target formation if it is determined that the strongly bound water saturation of the target formation is greater than or equal to the water saturation of the target formation; or if the water saturation of the target stratum is determined to be larger than the strong irreducible water saturation of the target stratum and the water saturation of the target stratum is less than or equal to the weak irreducible water saturation of the target stratum, determining that the target stratum comprises strong irreducible water and weak irreducible water; or if the water saturation of the target stratum is determined to be larger than the weak bound water saturation of the target stratum, determining that the target stratum comprises strong bound water, weak bound water and free water.
Optionally, the core sample information determining module 310 includes: the capillary pressure determining unit is used for determining the average strong capillary pressure and the average weak capillary pressure of each core sample; and the irreducible water saturation determining unit is used for determining the strong irreducible water saturation of each core sample under the average strong capillary pressure and the weak irreducible water saturation under the average weak capillary pressure by adopting a capillary pressure experiment.
Optionally, the capillary pressure determining unit comprises a capillary pressure determining subunit, which is used for determining the strong capillary pressure and the weak capillary pressure of each core sample after the saturated water treatment by adopting a multistage centrifugal force nuclear magnetic experiment; the average strong capillary pressure determining subunit is used for taking the average value of each strong capillary pressure as the average strong capillary pressure of each core sample; and the average weak capillary pressure determining subunit is used for taking the average value of the weak capillary pressures as the average weak capillary pressure of each core sample.
The device provided by the embodiment can execute the logging evaluation method for the water outlet result of the low-permeability and compact gas reservoir provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method.
Fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present invention, and as shown in fig. 6, the electronic device includes:
one or more processors 410, one processor 410 being exemplified in FIG. 6;
a memory 420;
the apparatus may further include: an input device 430 and an output device 440.
The processor 410, the memory 420, the input device 430 and the output device 440 of the apparatus may be connected by a bus or other means, for example, in fig. 6.
The memory 420 serves as a non-transitory computer readable storage medium and may be used for storing software programs, computer executable programs, and modules, such as program instructions/modules corresponding to the logging evaluation method for the water production result of the hypotonic tight gas reservoir in the embodiment of the present invention. The processor 410 executes software programs, instructions and modules stored in the memory 420 to execute various functional applications and data processing of the computer device, namely, to implement the logging evaluation method of the water outlet result of the hypotonic dense gas reservoir of the above method embodiment, that is:
determining pore structure parameters, strong bound water saturation and weak bound water saturation of at least one core sample in a target formation; wherein the reservoir type of the target formation comprises at least one of a conventional reservoir, a hypotonic reservoir, and a tight reservoir;
determining the change trend of the strong bound water saturation of the target stratum according to the strong bound water saturation of each core sample and the pore structure parameter of each core sample, and determining the change trend of the weak bound water saturation of the target stratum according to the weak bound water saturation of each core sample and the pore structure parameter of each core sample;
determining a water outlet result of the target stratum according to the strong bound water saturation change trend, the weak bound water saturation change trend and the water saturation change trend of the target stratum; and determining the water saturation change trend of the target stratum according to the closed coring saturation of each core sample.
The memory 420 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to use of the computer device, and the like. Further, the memory 420 may include high speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, memory 420 may optionally include memory located remotely from processor 410, which may be connected to the terminal device via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 430 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the computer apparatus. The output device 440 may include a display device such as a display screen.
Embodiments of the present invention provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements a method for evaluating a log of a water-out result of a low-permeability and tight gas reservoir, that is, the method includes:
determining pore structure parameters, strong bound water saturation and weak bound water saturation of at least one core sample in a target formation; wherein the reservoir type of the target formation comprises at least one of a conventional reservoir, a hypotonic reservoir, and a tight reservoir;
determining the change trend of the strong bound water saturation of the target stratum according to the strong bound water saturation of each core sample and the pore structure parameter of each core sample, and determining the change trend of the weak bound water saturation of the target stratum according to the weak bound water saturation of each core sample and the pore structure parameter of each core sample;
determining a water outlet result of the target stratum according to the strong bound water saturation change trend, the weak bound water saturation change trend and the water saturation change trend of the target stratum; and determining the water saturation change trend of the target stratum according to the closed coring saturation of each core sample.
Any combination of one or more computer-readable media may be employed. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A logging evaluation method for a water outlet result of a low-permeability and compact gas reservoir is characterized by comprising the following steps:
determining pore structure parameters, strong bound water saturation and weak bound water saturation of at least one core sample in a target formation; wherein the reservoir type of the target formation comprises at least one of a conventional reservoir, a hypotonic reservoir, and a tight reservoir;
determining the change trend of the strong bound water saturation of the target stratum according to the strong bound water saturation of each core sample and the pore structure parameter of each core sample, and determining the change trend of the weak bound water saturation of the target stratum according to the weak bound water saturation of each core sample and the pore structure parameter of each core sample;
determining a water outlet result of the target stratum according to the strong bound water saturation change trend, the weak bound water saturation change trend and the water saturation change trend of the target stratum; and determining the water saturation change trend of the target stratum according to the closed coring saturation of each core sample.
2. The method of claim 1, wherein determining a strong binder water saturation trend of the target formation from the strong binder water saturation of each core sample and the pore structure parameter of each core sample, and wherein determining a weak binder water saturation trend of the target formation from the weak binder water saturation of each core sample and the pore structure parameter of each core sample comprises:
determining a strong bound water boundary model of the target stratum according to the strong bound water saturation of each core sample and the pore structure parameters of each core sample;
determining a strong bound water saturation change trend of the target formation according to the strong bound water boundary model;
determining a weak bound water boundary model of the target stratum according to the weak bound water saturation of each core sample and the pore structure parameters of each core sample;
and determining the weak bound water saturation change trend of the target stratum according to the weak bound water boundary model.
3. The method of claim 2, wherein determining the strongly bound water boundary model for the target formation as a function of the strongly bound water saturation of each core sample and the pore structure parameters of each core sample comprises:
and fitting the strong bound water saturation of each core sample and the pore structure parameters of each core sample by adopting a power function to determine a strong bound water boundary model of the target stratum.
4. The method of claim 2, wherein determining the weakly bound water boundary model for the target formation as a function of the weakly bound water saturation of each core sample and the pore structure parameters of each core sample comprises:
and fitting the weak bound water saturation of each core sample and the pore structure parameters of each core sample by adopting a power function to determine a weak bound water boundary model of the target stratum.
5. The method of claim 1, wherein determining a water production result for a target formation based on the strong bound water saturation tendency, the weak bound water saturation tendency, and the water saturation tendency of the target formation comprises:
determining that only strongly irreducible water is included in the target formation if it is determined that the strongly irreducible water saturation of the target formation is greater than or equal to the water saturation of the target formation;
or if the water saturation of the target stratum is determined to be larger than the strong irreducible water saturation of the target stratum and the water saturation of the target stratum is less than or equal to the weak irreducible water saturation of the target stratum, determining that the target stratum comprises strong irreducible water and weak irreducible water;
or if the water saturation of the target stratum is determined to be larger than the weak bound water saturation of the target stratum, determining that the target stratum comprises strong bound water, weak bound water and free water.
6. The method of claim 1, wherein determining the strongly bound water saturation and the weakly bound water saturation comprises:
determining the average strong capillary pressure and the average weak capillary pressure of each core sample;
and determining the strong bound water saturation of each core sample under the average strong capillary pressure and the weak bound water saturation under the average weak capillary pressure by adopting a capillary pressure experiment.
7. The method of claim 6, wherein determining an average strong capillary pressure and an average weak capillary pressure for each core sample comprises:
determining the strong capillary pressure and the weak capillary pressure of each core sample after saturated water treatment by adopting a multistage centrifugal force nuclear magnetic experiment;
taking the average value of the strong capillary pressure as the average strong capillary pressure of each core sample;
the average value of the weak capillary pressures was taken as the average weak capillary pressure of each core sample.
8. A logging evaluation device for water outlet results of a low-permeability and compact gas reservoir is characterized by comprising:
the core sample information determining module is used for determining the pore structure parameter, the strong bound water saturation and the weak bound water saturation of at least one core sample in a target stratum; wherein the reservoir type of the target formation comprises at least one of a conventional reservoir, a hypotonic reservoir, and a tight reservoir;
the irreducible water saturation change trend determination module is used for determining the irreducible water saturation change trend of the target stratum according to the irreducible water saturation of each core sample and the pore structure parameters of each core sample, and determining the weakly irreducible water saturation change trend of the target stratum according to the weakly irreducible water saturation of each core sample and the pore structure parameters of each core sample;
the water outlet result determining module is used for determining the water outlet result of the target stratum according to the strong bound water saturation change trend, the weak bound water saturation change trend and the water saturation change trend of the target stratum; and determining the water saturation change trend of the target stratum according to the closed coring saturation of each core sample.
9. An electronic device, comprising:
one or more processors;
a storage device for storing one or more programs,
when executed by the one or more processors, cause the one or more processors to implement the method for well logging evaluation of hypotonic, tight gas reservoir water production results of any of claims 1-7.
10. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, is adapted to carry out a method for well logging evaluation of hypotonic tight gas reservoir water production results according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210064522.2A CN114382460B (en) | 2022-01-20 | 2022-01-20 | Logging evaluation method and device for low-permeability and tight gas reservoir water outlet result |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210064522.2A CN114382460B (en) | 2022-01-20 | 2022-01-20 | Logging evaluation method and device for low-permeability and tight gas reservoir water outlet result |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114382460A true CN114382460A (en) | 2022-04-22 |
| CN114382460B CN114382460B (en) | 2024-06-14 |
Family
ID=81203564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210064522.2A Active CN114382460B (en) | 2022-01-20 | 2022-01-20 | Logging evaluation method and device for low-permeability and tight gas reservoir water outlet result |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114382460B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4413512A (en) * | 1982-01-04 | 1983-11-08 | Mobil Oil Corporation | Method of locating potential low water cut hydrocarbon reservoirs |
| CN101806215A (en) * | 2010-03-05 | 2010-08-18 | 中国石油集团川庆钻探工程有限公司 | Method for discriminating reservoir fluid type by irreducible water saturation data |
| CN104564006A (en) * | 2015-02-04 | 2015-04-29 | 中国海洋石油总公司 | Hypotonic gas well fracturing water-producing capacity judgment method |
| CN105445441A (en) * | 2015-12-03 | 2016-03-30 | 中国石油天然气股份有限公司 | Reservoir gas saturation determination method and device |
-
2022
- 2022-01-20 CN CN202210064522.2A patent/CN114382460B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4413512A (en) * | 1982-01-04 | 1983-11-08 | Mobil Oil Corporation | Method of locating potential low water cut hydrocarbon reservoirs |
| CN101806215A (en) * | 2010-03-05 | 2010-08-18 | 中国石油集团川庆钻探工程有限公司 | Method for discriminating reservoir fluid type by irreducible water saturation data |
| CN104564006A (en) * | 2015-02-04 | 2015-04-29 | 中国海洋石油总公司 | Hypotonic gas well fracturing water-producing capacity judgment method |
| CN105445441A (en) * | 2015-12-03 | 2016-03-30 | 中国石油天然气股份有限公司 | Reservoir gas saturation determination method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114382460B (en) | 2024-06-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109838230B (en) | Quantitative evaluation method for oil reservoir water flooded layer | |
| CN103279647B (en) | A kind of method calculating Sandstone Gas Reservoir permeability based on pore character parameter | |
| CN110824556B (en) | Rock physical model building method and application of unconventional tight sandstone reservoir | |
| CN104819923B (en) | Low permeability sandstone reservoir pore structure quantitative inversion method based on nuclear magnetic resonance | |
| CN110231272B (en) | Compact sandstone pore diameter and nuclear magnetic resonance T2Method and system for determining value conversion relation | |
| Viig et al. | Application of a new class of chemical tracers to measure oil saturation in partitioning interwell tracer tests | |
| CN110927035A (en) | Method for calculating saturation of irreducible tight sandstone bound water | |
| CN114240212B (en) | Method and equipment for determining influence weight of geological parameter on resource quantity | |
| CN104101905A (en) | Reservoir classification method based on rock electricity parameters | |
| CN104278989A (en) | Method for obtaining saturation index of low-porosity and low-permeability reservoir | |
| CN112129802B (en) | Quantitative analysis method for pore volume increment of hydrated shale in different scales | |
| CN104034645A (en) | Detection algorithm for pore structure of shale gas reservoir | |
| CN106777515B (en) | Method for analyzing production energy of tight gas well based on rock core experiment data | |
| CN103046924B (en) | Exponential-based method and system for acquiring absolute unobstructed flow of condensate gas reservoir | |
| CN110470581B (en) | Method and device for determining stress sensitivity of reservoir and storage medium | |
| CN114254505A (en) | Method and device for constructing permeability model, electronic equipment and storage medium | |
| CN114577677B (en) | Compact oil reservoir nonlinear seepage characterization method based on reservoir heterogeneity | |
| CN111305805B (en) | Reservoir fracture imbibition quality prediction method and system | |
| CN114382460B (en) | Logging evaluation method and device for low-permeability and tight gas reservoir water outlet result | |
| CN106570235B (en) | Method and device for acquiring electrical parameters of tight sandstone rock | |
| CN103046925A (en) | Binomial-based method and system for acquiring absolute unobstructed flow of condensate gas reservoir | |
| CN105929135A (en) | Testing method for reserve utilization degree of low-permeability gas pool | |
| CN112485281B (en) | Method for dynamically measuring gas hydrate saturation and permeability in porous medium | |
| CN112834404B (en) | Method and device for determining gas production capacity of shale reservoir | |
| Ma et al. | Correlation of capillary pressure relationships and calculations of permeability |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |