CN114429026A - Method and device for calculating ancient oil reservoir area of crude oil pyrolysis gas reservoir - Google Patents
Method and device for calculating ancient oil reservoir area of crude oil pyrolysis gas reservoir Download PDFInfo
- Publication number
- CN114429026A CN114429026A CN202011181323.7A CN202011181323A CN114429026A CN 114429026 A CN114429026 A CN 114429026A CN 202011181323 A CN202011181323 A CN 202011181323A CN 114429026 A CN114429026 A CN 114429026A
- Authority
- CN
- China
- Prior art keywords
- crude oil
- reservoir
- oil
- ancient
- area
- 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.)
- Pending
Links
- 239000010779 crude oil Substances 0.000 title claims abstract description 221
- 239000003921 oil Substances 0.000 title claims abstract description 113
- 238000000197 pyrolysis Methods 0.000 title claims abstract description 96
- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000007789 gas Substances 0.000 claims abstract description 188
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 76
- 238000005336 cracking Methods 0.000 claims abstract description 49
- 238000004364 calculation method Methods 0.000 claims abstract description 38
- 238000009933 burial Methods 0.000 claims abstract description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 52
- 239000003345 natural gas Substances 0.000 claims description 25
- 238000004590 computer program Methods 0.000 claims description 16
- 239000010426 asphalt Substances 0.000 claims description 13
- 238000003860 storage Methods 0.000 claims description 12
- 239000003208 petroleum Substances 0.000 claims description 8
- 238000010586 diagram Methods 0.000 description 11
- 230000006870 function Effects 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 238000009826 distribution Methods 0.000 description 5
- 239000004215 Carbon black (E152) Substances 0.000 description 4
- 229930195733 hydrocarbon Natural products 0.000 description 4
- 150000002430 hydrocarbons Chemical class 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 235000013351 cheese Nutrition 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005120 petroleum cracking Methods 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/28—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring areas
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V9/00—Prospecting or detecting by methods not provided for in groups G01V1/00 - G01V8/00
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V9/00—Prospecting or detecting by methods not provided for in groups G01V1/00 - G01V8/00
- G01V9/005—Prospecting or detecting by methods not provided for in groups G01V1/00 - G01V8/00 by thermal methods, e.g. after generation of heat by chemical reactions
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/28—Design optimisation, verification or simulation using fluid dynamics, e.g. using Navier-Stokes equations or computational fluid dynamics [CFD]
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2113/00—Details relating to the application field
- G06F2113/08—Fluids
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/08—Thermal analysis or thermal optimisation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geometry (AREA)
- Evolutionary Computation (AREA)
- General Engineering & Computer Science (AREA)
- Geophysics (AREA)
- Computer Hardware Design (AREA)
- Algebra (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Chemical & Material Sciences (AREA)
- Computing Systems (AREA)
- Fluid Mechanics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Mathematical Physics (AREA)
- Pure & Applied Mathematics (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention discloses a method and a device for calculating the area of an ancient oil reservoir of a crude oil pyrolysis gas reservoir, wherein the method comprises the following steps: acquiring the formation temperature and the formation pressure of an ancient oil reservoir of a crude oil pyrolysis gas reservoir; acquiring the density of the same type of crude oil in the ancient oil reservoir of the crude oil pyrolysis gas reservoir under the ground standard condition; calculating the volume coefficient of the crude oil in the crude oil pyrolysis gas reservoir paleor oil reservoir according to the burial depth of the paleor oil reservoir of the crude oil pyrolysis gas reservoir; calculating the cracking rate of the crude oil in the crude oil cracking gas reservoir ancient oil reservoir; acquiring deviation coefficients of original gases in the crude oil pyrolysis gas reservoir; and calculating the area of the crude oil cracked gas reservoir according to the formation temperature, the formation pressure, the density of the crude oil under the ground standard condition, the volume coefficient of the crude oil, the cracking rate of the crude oil and the deviation coefficient of the original gas. The method is simple in calculation, high in accuracy and high in practicability.
Description
Technical Field
The invention relates to the field of oil-gas dynamic reservoir geology, in particular to a method and a device for calculating the area of an ancient oil reservoir of a crude oil pyrolysis gas reservoir.
Background
The geology of the oil-gas reservoir is the core of the geology of the petroleum, is a branch subject for researching the formation and distribution rules of the oil-gas reservoir in the geology of the petroleum, and the research contents of the geology of the oil-gas reservoir comprise static reservoir formation elements, dynamic reservoir formation processes, effects and final reservoir formation results, and relate to various aspects of generation, transportation, accumulation, preservation and the like which influence the formation and distribution of the oil-gas reservoir. The ancient oil reservoir area is a very important parameter for reservoir formation research, and the determination of the ancient oil reservoir area has important significance for the research of the ancient oil reservoir scale, hydrocarbon generation potential and resource potential and also has important guiding effect on zone evaluation and determination of favorable targets.
The prior art mainly comprises two methods for determining the oil reservoir area of the ancient oil reservoir: firstly, determining the ancient oil reservoir area according to the distribution area of the asphalt; and secondly, determining the ancient oil reservoir area according to the ancient trapping area. Determining the ancient oil reservoir area according to the distribution area of the asphalt, wherein the method has the disadvantages that well drilling information is needed, areas lacking the well drilling information cannot be implemented, and the area of the ancient crude oil needs certain conditions to be judged according to the residual asphalt of the reservoir at present, because the structural form of the gas field and the structural form of the ancient crude oil gathering gas are obviously changed, whether the distribution of the solid asphalt is influenced by structural deformation or not needs to be clearly determined, namely whether the crude oil cracking is completed before the structural deformation or not. The ancient oil reservoir area is determined according to the ancient trap area, the ancient trap area is not necessarily the ancient oil reservoir area, the oil reservoir is not necessarily filled with the whole trap, the ancient trap represents the maximum ancient oil reservoir area, and the ancient trap area does not necessarily accord with the fact. In conclusion, the prior art has the advantages of high difficulty in determining the area of the ancient oil reservoir and low accuracy.
Disclosure of Invention
The embodiment of the invention provides a method for calculating the area of an ancient oil reservoir of a crude oil pyrolysis gas reservoir, which is simple in calculation, higher in accuracy and higher in practicability, and comprises the following steps:
acquiring the formation temperature and the formation pressure of an ancient oil reservoir of a crude oil pyrolysis gas reservoir;
acquiring the density of the same type of crude oil in the ancient oil reservoir of the crude oil pyrolysis gas reservoir under the ground standard condition;
calculating the volume coefficient of the crude oil in the crude oil pyrolysis gas reservoir paleor oil reservoir according to the burial depth of the paleor oil reservoir of the crude oil pyrolysis gas reservoir;
calculating the cracking rate of the crude oil in the crude oil cracking gas reservoir ancient oil reservoir;
acquiring deviation coefficients of original gases in the crude oil pyrolysis gas reservoir;
and calculating the area of the crude oil pyrolysis gas reservoir ancient oil deposit according to the formation temperature, the formation pressure, the density of the crude oil under the ground standard condition, the volume coefficient of the crude oil, the pyrolysis rate of the crude oil and the deviation coefficient of the original gas.
The embodiment of the invention also provides a device for calculating the ancient oil deposit area of the crude oil pyrolysis gas reservoir, which is simple in calculation, higher in accuracy and higher in practicability, and comprises the following components:
the temperature and pressure acquisition module is used for acquiring the formation temperature and the formation pressure of the crude oil pyrolysis gas reservoir ancient oil reservoir;
the density acquisition module is used for acquiring the density of the same type of crude oil in the crude oil pyrolysis gas reservoir ancient oil reservoir under the ground standard condition;
the volume coefficient acquisition module is used for calculating the volume coefficient of the crude oil in the crude oil pyrolysis gas reservoir paleor reservoir according to the burial depth of the crude oil pyrolysis gas reservoir paleor reservoir;
the cracking rate calculation module is used for calculating the cracking rate of the crude oil in the crude oil cracking gas reservoir ancient oil reservoir;
the deviation coefficient acquisition module is used for acquiring the deviation coefficient of the original gas in the crude oil pyrolysis gas reservoir ancient oil deposit;
and the area calculation module is used for calculating the area of the crude oil cracked gas reservoir paleor according to the formation temperature, the formation pressure, the density of the crude oil under the ground standard condition, the volume coefficient of the crude oil, the cracking rate of the crude oil and the deviation coefficient of the original gas.
The embodiment of the present invention further provides a computer device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the method when executing the computer program.
An embodiment of the present invention further provides a computer-readable storage medium, in which a computer program for executing the above method is stored.
In the embodiment of the invention, the density of the same type of crude oil in the crude oil pyrolysis gas reservoir ancient oil deposit under the ground standard condition is obtained by obtaining the formation temperature and the formation pressure of the crude oil pyrolysis gas reservoir ancient oil deposit, the volume coefficient of the crude oil in the crude oil pyrolysis gas reservoir ancient oil deposit is calculated according to the buried depth of the crude oil pyrolysis gas reservoir ancient oil deposit, the cracking rate of the crude oil in the crude oil pyrolysis gas reservoir ancient oil deposit is calculated, the deviation coefficient of the original gas in the crude oil pyrolysis gas reservoir ancient oil deposit is obtained, the area of the crude oil pyrolysis gas reservoir ancient oil deposit can be calculated according to the formation temperature, the formation pressure, the density of the crude oil under the ground standard condition, the volume coefficient of the crude oil, the cracking rate of the crude oil and the deviation coefficient of the original gas, and the calculation is simple, high in accuracy and strong in practicability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts. In the drawings:
FIG. 1 is a flow chart of a method for calculating the area of an ancient reservoir of a crude oil pyrolysis gas reservoir according to an embodiment of the invention;
FIG. 2 is a flowchart of a method for calculating the area of an ancient reservoir of a crude oil pyrolysis gas reservoir according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a device for calculating an ancient reservoir area of a crude oil pyrolysis gas reservoir in an embodiment of the invention;
FIG. 4 is a flowchart illustrating a method for calculating the area of an ancient reservoir of a crude oil pyrolysis gas reservoir according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a computer apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
Fig. 1 is a flowchart of a method for calculating an ancient reservoir area of a crude oil pyrolysis gas reservoir according to an embodiment of the present invention, as shown in fig. 1, the method includes:
In specific implementation, the formation temperature and the formation pressure of the crude oil pyrolysis gas reservoir ancient oil reservoir can be obtained according to a gas reservoir production test result or a reserve report.
102, obtaining the density of the same type of crude oil in the crude oil pyrolysis gas reservoir ancient oil reservoir under the ground standard condition.
In the embodiment, crude oil samples cannot be obtained after crude oil cracking of the gas reservoir is finished, crude oil generated by the same type of hydrocarbon source rock is selected as a research object according to the type of the hydrocarbon source rock of the gas reservoir, and the density rho of the crude oil is measured under the ground standard condition (293k, 0.101MPa)oThe unit:g/m3。
103, calculating the volume coefficient of the crude oil in the crude oil pyrolysis gas reservoir paleor oil reservoir according to the burial depth of the paleor oil reservoir of the crude oil pyrolysis gas reservoir.
In the examples, the crude oil volume factor BoiAlso called the underground volume coefficient of crude oil, is defined as the volume V of crude oil in the groundf(i.e. volume of formation oil) and its volume after degassing at surface VsThe ratio of. Can be obtained according to the standard empirical formula:
Boi＝0.972+1.1213×10-2F1.175
wherein R issIs the volume ratio of dissolved gas to oil; ro is the relative density of the ground degassed crude oil; rg is the relative density of the gas in the separator, and the density of the air is 1.0kg/m3(ii) a And T is the formation temperature read according to the depth of the ancient oil reservoir determined according to the burying history, and the unit is K.
And 104, calculating the cracking rate of the crude oil in the crude oil cracking gas reservoir ancient oil reservoir.
In specific implementation, a proper amount (weight is m) is extracted by a glass syringe1) Injecting crude oil into a gold tube, gradually heating to a limit temperature according to the steps of a thermal simulation experiment of hydrocarbon generation of the gold tube, taking out a residual sample after the crude oil is completely cracked, and weighing the residual sample to be m2The cracking amount of the crude oil is m1-m2Then, the cracking rate Xm＝(m1-m2)/m1。
And 105, obtaining deviation coefficients of original gases in the crude oil pyrolysis gas reservoir ancient oil deposit.
In specific implementation, the high-pressure physical property PVT cylinder can be utilized to measure the volume of natural gas under the condition of constant temperature and pressure of the natural gas to the temperature and pressure of the gas reservoir, then the natural gas is put on the ground under the standard condition (293K, 0.101Mpa) to measure the volume of the natural gas, and the original gas deviation coefficient Z of the gas reservoir is calculated according to the state equation of the gasi。
And 106, calculating the area of the ancient oil reservoir of the crude oil pyrolysis gas reservoir according to the formation temperature, the formation pressure, the density of the crude oil under the ground standard condition, the volume coefficient of the crude oil, the cracking rate of the crude oil and the deviation coefficient of the original gas.
The method for calculating the area of the crude oil pyrolysis gas reservoir ancient oil deposit, provided by the embodiment of the invention, comprises the steps of obtaining the formation temperature and the formation pressure of the crude oil pyrolysis gas reservoir ancient oil deposit, obtaining the density of the same type of crude oil in the crude oil pyrolysis gas reservoir ancient oil deposit under the ground standard condition, calculating the volume coefficient of the crude oil in the crude oil pyrolysis gas reservoir ancient oil deposit according to the buried depth of the crude oil pyrolysis gas reservoir ancient oil deposit, calculating the cracking rate of the crude oil in the crude oil pyrolysis gas reservoir ancient oil deposit, obtaining the deviation coefficient of the original gas in the crude oil pyrolysis gas reservoir ancient oil deposit, and calculating the area of the crude oil pyrolysis gas reservoir ancient oil deposit according to the formation temperature, the formation pressure, the density of the crude oil under the ground standard condition, the volume coefficient of the crude oil, the cracking rate of the crude oil and the deviation coefficient of the original gas, wherein the calculation is simple, high in accuracy and strong in practicability.
As shown in fig. 2, before obtaining the formation temperature and the formation pressure of the crude oil pyrolysis gas reservoir ancient oil reservoir, the method further comprises:
Calculating the area of the crude oil pyrolysis gas reservoir ancient oil deposit according to the formation temperature, the formation pressure, the density of the crude oil under the ground standard condition, the volume coefficient of the crude oil, the pyrolysis rate of the crude oil and the deviation coefficient of the original gas, wherein the calculation comprises the following steps:
substituting the formation temperature, the formation pressure, the density of the crude oil under the ground standard condition, the volume coefficient of the crude oil, the cracking rate of the crude oil and the deviation coefficient of the original gas into a calculation formula of the ancient oil deposit area of the crude oil cracking gas reservoir;
and calculating the area of the crude oil pyrolysis gas reservoir ancient oil reservoir by using a calculation formula of the crude oil pyrolysis gas reservoir ancient oil reservoir area.
In the embodiment of the invention, the calculation formula of the ancient reservoir area of the crude oil pyrolysis gas reservoir is as follows:
wherein Ao is the area of the original oil reservoir and the unit is m2(ii) a Ag is the gas-containing area of the present gas reservoir, m2；XmThe crude oil cracking rate is the percentage of the total mass of the generated natural gas in the mass of the crude oil; b isoiIs the volume coefficient of crude oil; rhogThe density of the natural gas under the ground standard condition is 0.667kg/m3；ρoThe density of petroleum under the ground standard conditions is expressed in kg/m3；ρbIs the density of the asphalt in kg/m3；ZiThe deviation coefficient of the original gas is taken as the deviation coefficient of the original gas; pscThe standard pressure of the ground is 0.101 MPa; t is the formation temperature, K; piIs the gas reservoir formation pressure, MPa; t isscStandard temperature at ground level, 293K.
The derivation process of the formula for calculating the ancient reservoir area of the crude oil pyrolysis gas reservoir is described as follows:
the set geological model is:
(1) the natural gas is produced after petroleum cracking and has no cheese root generated gas;
(2) the physical properties of the reservoir before and after crude oil cracking are unchanged, the loss of natural gas is small, and the gas saturation is equal to the oil saturation.
According to requirements of a petroleum and natural gas control reserve calculation method (Q/SY 179-2006), the geological reserve is calculated by a volumetric method, and the calculation formula is as follows:
G＝Ag×h×φ×Sgi/Bgi [1]
N＝Ao×h×φ×Soi/Boi [2]
Bgi＝(Psc×Zi×T)/(Pi×Tsc) [3]
in the formula: g is the geological reserve of natural gas, m3；AgIs the area of gas, m2(ii) a N is petroleum geological reserve, m3；AoIs petroleumGeological reserve, m3(ii) a h is the effective thickness, m; phi is the effective porosity, decimal; sgiIs the original gas saturation, decimal; soiIs the original oil saturation, decimal; b isgiThe natural gas is the original natural gas volume coefficient without dimension; b isoiThe volume coefficient of the original petroleum is zero dimension; pscThe standard pressure of the ground is 0.101 MPa; ziThe deviation coefficient of the original gas is taken as the deviation coefficient of the original gas; t is the formation temperature, K; piIs the gas reservoir formation pressure, MPa; t isscStandard temperature at ground level, 293K.
The geological model has small loss, so the area of the gas reservoir is larger than or equal to the original area of the oil reservoir. From this, the gas-containing area Ag (unit is m) is now known2) Is composed of two parts, one part is the area A of original oil deposito(unit is m)2The parameter is unknown quantity and is the parameter required by the invention), the expanded area of the other part of natural gas: a. theg-Ao. The parameters in the above formula corresponding to the two parts are different only in effective porosity phi, the porosity of the pores in the range of the original oil reservoir is small due to the filling of asphalt, and the residual porosity phi after the oil reservoir cracking is setoThe porosity in the expanded area of natural gas is the original porosity phi.
According to the formula [1], the geological reserves of natural gas in the current gas-containing area are:
G＝[Ao×h×φo×Sgi+(Ag-Ao)×h×φ×Sgi]/Bgi [4]
according to the density rho of natural gas under the standard condition of the groundgIn units of kg/m3And then the quality of the gas reservoir natural gas is as follows:
Mg＝[Ao×h×φo×Sgi+(Ag-Ao)×h×φ×Sgi]×ρg/Bgi [5]
Mgis the mass of natural gas, and the unit is kg.
According to the theorem of cracking rate and conservation of mass, the mass of natural gas is converted into the mass of crude oil before cracking:
Mo＝Mg/Xm [6]
Mothe mass of the crude oil in kg, formula [5 ]]Carry-in type [6]Namely:
Mo＝[Ao×φo+(Ag-Ao)×φ]×h×Sgi×ρg/(Xm×Bgi) [7]
according to equation [2], the original reservoir geological reserve is:
Mo＝Ao×h×φ×Soi×ρo/Boi [8]
formula [8]Middle SoiIs the original oil saturation, decimal, for simplicity, Soi＝Sgi。
After crude oil in the reservoir is cracked, the remaining total mass is as follows:
Ms＝V×φ×ρo×(1-Xm)/Boi [9]
Msis the residual weight of crude oil after cracking, kg; v is the total volume of the reservoir, m3。
The total weight of bitumen in the reservoir pores is:
Mb＝V×(φ-φo)×ρb[10]
Mbkg, total weight of bitumen in the pores of the reservoir; v is the total volume of the reservoir, m3；ρbIs the density of the asphalt in kg/m3。
According to the conservation of mass, the weight of the bitumen in the pores is equal to the residual weight of the crude oil after cracking, i.e.:
V×φ×ρo×(1-Xm)/Boi＝V×(φ-φo)×ρb[11]
after finishing, the following can be obtained:
φo＝φ×[1-(1-Xm)×ρo/(ρb×Boi)] [12]
the formula [7] and the formula [8] are combined to form
Ao×h×φ×Sgi×ρo/Boi＝[Ao×φo+(Ag-Ao)×φ]×h×Sgi×ρg/(Xm×Bgi) [13]
Finishing to obtain:
Ao＝(Ag×φ×ρg×Boi)/[Xm×Bgi×φ×ρo+(φ-φo)×Boi×ρg] [14]
substituting the formula [12] and the formula [3] into the formula [14], and finishing to obtain:
based on the same inventive concept, the embodiment of the invention also provides a device for calculating the ancient reservoir area of the crude oil pyrolysis gas reservoir, which is described in the following embodiment. Because the principle of solving the problems of the crude oil pyrolysis gas reservoir paleor reservoir area calculation device is similar to the crude oil pyrolysis gas reservoir paleor reservoir area calculation method, the implementation of the crude oil pyrolysis gas reservoir paleor reservoir area calculation device can refer to the implementation of the crude oil pyrolysis gas reservoir paleor reservoir area calculation method, and repeated parts are not repeated. As used hereinafter, the term "unit" or "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.
Fig. 3 is a schematic structural diagram of an apparatus for calculating an ancient reservoir area of a crude oil pyrolysis gas reservoir according to an embodiment of the present invention, as shown in fig. 3, the apparatus includes:
the temperature and pressure acquisition module 301 is used for acquiring the formation temperature and the formation pressure of the crude oil pyrolysis gas reservoir ancient oil reservoir;
a density obtaining module 302, configured to obtain densities of crude oils of the same type in the crude oil cracked gas reservoir under a ground standard condition;
the volume coefficient acquisition module 303 is configured to calculate a volume coefficient of crude oil in the crude oil pyrolysis gas reservoir paleor according to the burial depth of the crude oil pyrolysis gas reservoir paleor;
the cracking rate calculation module 304 is used for calculating the cracking rate of the crude oil in the crude oil cracking gas reservoir ancient oil reservoir;
a deviation coefficient obtaining module 305, configured to obtain a deviation coefficient of an original gas in the crude oil cracked gas reservoir;
and the area calculation module 306 is used for calculating the area of the crude oil cracked gas reservoir according to the formation temperature, the formation pressure, the density of the crude oil under the ground standard condition, the volume coefficient of the crude oil, the cracking rate of the crude oil and the deviation coefficient of the original gas.
In an embodiment of the present invention, as shown in fig. 4, the apparatus includes:
the formula establishing module 401 is used for establishing a calculation formula of the ancient oil reservoir area of the crude oil pyrolysis gas reservoir;
the area calculation module 306 is further configured to:
substituting the formation temperature, the formation pressure, the density of the crude oil under the ground standard condition, the volume coefficient of the crude oil, the cracking rate of the crude oil and the deviation coefficient of the original gas into a calculation formula of the ancient oil deposit area of the crude oil cracking gas reservoir;
and calculating the area of the crude oil pyrolysis gas reservoir ancient oil reservoir by using a calculation formula of the crude oil pyrolysis gas reservoir ancient oil reservoir area.
In the embodiment of the invention, the calculation formula of the ancient reservoir area of the crude oil pyrolysis gas reservoir is as follows:
wherein Ao is the area of the original oil reservoir and the unit is m2(ii) a Ag is the gas-containing area of the present gas reservoir, m2；XmThe crude oil cracking rate is the percentage of the total mass of the generated natural gas in the mass of the crude oil; b isoiIs the volume coefficient of crude oil; rhogThe density of the natural gas under the ground standard condition is 0.667kg/m3；ρoThe density of petroleum under the ground standard conditions is expressed in kg/m3；ρbIs the density of asphaltIs located in kg/m3；ZiThe deviation coefficient of the original gas is taken as the deviation coefficient of the original gas; pscThe standard pressure of the ground is 0.101 MPa; t is the formation temperature, K; piIs the gas reservoir formation pressure, MPa; t isscStandard temperature at ground level, 293K.
In the examples of the present invention, the volume coefficient B of the crude oiloiThe calculation formula of (2) is as follows:
Boi＝0.972+1.1213×10-2F1.175
wherein R issIs the volume ratio of dissolved gas to oil; ro is the relative density of the ground degassed crude oil; rg is the relative density of the gas in the separator, and the density of the air is 1.0kg/m3(ii) a And T is the formation temperature read according to the depth of the ancient oil reservoir determined according to the burying history, and the unit is K.
To achieve the above object, according to another aspect of the present application, there is also provided a computer apparatus. As shown in fig. 5, the computer device comprises a memory, a processor, a communication interface and a communication bus, wherein a computer program that can be run on the processor is stored in the memory, and the steps of the method of the above embodiment are realized when the processor executes the computer program.
The processor may be a Central Processing Unit (CPU). The Processor may also be other general purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, or a combination thereof.
The memory, which is a non-transitory computer readable storage medium, may be used to store non-transitory software programs, non-transitory computer executable programs, and units, such as the corresponding program units in the above-described method embodiments of the present invention. The processor executes various functional applications of the processor and the processing of the work data by executing the non-transitory software programs, instructions and modules stored in the memory, that is, the method in the above method embodiment is realized.
The memory 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 by the processor, and the like. Further, the memory may include high speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory optionally includes memory located remotely from the processor, and such remote memory may be coupled to the processor 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 one or more units are stored in the memory and when executed by the processor perform the method of the above embodiments.
An embodiment of the present invention further provides a computer-readable storage medium, in which a computer program for executing the above method is stored.
In conclusion, the method overcomes the defects and shortcomings of the existing technology for determining the area of the ancient oil reservoir in the oil-gas-containing basin, and quantitatively calculates the area of the ancient oil reservoir according to the oil-gas density, the asphalt density, the volume coefficient of crude oil, the cracking rate of crude oil, the compression factor of methane, the known temperature, the pressure and other parameters of the carbonate gas reservoir measured based on experiments in the dynamic reservoir formation process of the reservoir formation geology, so that the geological reserve of the ancient oil reservoir is calculated, the reliability and the accuracy of the result are improved, and the practicability is higher. The invention has the advantages of simple structure, reasonable design, strong practicability, low manufacturing cost and the like.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A method for calculating the ancient oil reservoir area of a crude oil pyrolysis gas reservoir is characterized by comprising the following steps:
acquiring the formation temperature and the formation pressure of an ancient oil reservoir of a crude oil pyrolysis gas reservoir;
acquiring the density of the same type of crude oil in the ancient oil reservoir of the crude oil pyrolysis gas reservoir under the ground standard condition;
calculating the volume coefficient of the crude oil in the crude oil pyrolysis gas reservoir paleor oil reservoir according to the burial depth of the paleor oil reservoir of the crude oil pyrolysis gas reservoir;
calculating the cracking rate of the crude oil in the crude oil cracking gas reservoir ancient oil reservoir;
acquiring deviation coefficients of original gases in the crude oil pyrolysis gas reservoir;
and calculating the area of the crude oil pyrolysis gas reservoir ancient oil deposit according to the formation temperature, the formation pressure, the density of the crude oil under the ground standard condition, the volume coefficient of the crude oil, the pyrolysis rate of the crude oil and the deviation coefficient of the original gas.
2. The method of claim 1, wherein prior to obtaining the formation temperature and the formation pressure of the crude oil pyrolysis gas reservoir, the method further comprises:
establishing a calculation formula of the ancient oil reservoir area of the crude oil pyrolysis gas reservoir;
calculating the area of the crude oil pyrolysis gas reservoir ancient oil deposit according to the formation temperature, the formation pressure, the density of the crude oil under the ground standard condition, the volume coefficient of the crude oil, the pyrolysis rate of the crude oil and the deviation coefficient of the original gas, wherein the calculation comprises the following steps:
substituting the formation temperature, the formation pressure, the density of the crude oil under the ground standard condition, the volume coefficient of the crude oil, the cracking rate of the crude oil and the deviation coefficient of the original gas into a calculation formula of the ancient oil deposit area of the crude oil cracking gas reservoir;
and calculating the area of the crude oil pyrolysis gas reservoir ancient oil reservoir by using a calculation formula of the crude oil pyrolysis gas reservoir ancient oil reservoir area.
3. The method of claim 2, wherein the crude oil pyrolysis gas reservoir paleor reservoir area is calculated by the formula:
wherein Ao is the area of the original oil reservoir and the unit is m2(ii) a Ag is the gas-containing area of the present gas reservoir, m2；XmThe crude oil cracking rate is the percentage of the total mass of the generated natural gas in the mass of the crude oil; b isoiIs the volume coefficient of crude oil; rhogThe density of the natural gas under the ground standard condition is 0.667kg/m3；ρoThe density of petroleum under the ground standard conditions is expressed in kg/m3；ρbIs the density of the asphalt in kg/m3；ZiThe deviation coefficient of the original gas is taken as the deviation coefficient of the original gas; pscThe standard pressure of the ground is 0.101 MPa; t is the formation temperature, K; piIs the gas reservoir formation pressure, MPa; t isscStandard temperature at ground level, 293K.
4. The method of claim 1, wherein the crude oil has a volume factor BoiThe calculation formula of (2) is as follows:
Boi＝0.972+1.1213×10-2F1.175
wherein R issIs the volume ratio of dissolved gas to oil; ro is the relative density of the ground degassed crude oil; rg is the relative density of the gas in the separator, and the density of the air is 1.0kg/m3(ii) a T is read according to the depth of the ancient oil deposit determined by the buried historyFormation temperature in K.
5. The utility model provides a crude oil pyrolysis gas reservoir ancient oil reservoir area calculating device which characterized in that includes:
the temperature and pressure acquisition module is used for acquiring the formation temperature and the formation pressure of the crude oil pyrolysis gas reservoir ancient oil reservoir;
the density acquisition module is used for acquiring the density of the same type of crude oil in the crude oil pyrolysis gas reservoir ancient oil reservoir under the ground standard condition;
the volume coefficient acquisition module is used for calculating the volume coefficient of the crude oil in the crude oil pyrolysis gas reservoir paleor reservoir according to the burial depth of the crude oil pyrolysis gas reservoir paleor reservoir;
the cracking rate calculation module is used for calculating the cracking rate of the crude oil in the crude oil cracking gas reservoir ancient oil reservoir;
the deviation coefficient acquisition module is used for acquiring the deviation coefficient of the original gas in the crude oil pyrolysis gas reservoir ancient oil deposit;
and the area calculation module is used for calculating the area of the crude oil cracked gas reservoir paleor according to the formation temperature, the formation pressure, the density of the crude oil under the ground standard condition, the volume coefficient of the crude oil, the cracking rate of the crude oil and the deviation coefficient of the original gas.
6. The apparatus of claim 5, comprising:
the formula establishing module is used for establishing a calculation formula of the ancient oil reservoir area of the crude oil pyrolysis gas reservoir;
the area calculation module is further to:
substituting the formation temperature, the formation pressure, the density of the crude oil under the ground standard condition, the volume coefficient of the crude oil, the cracking rate of the crude oil and the deviation coefficient of the original gas into a calculation formula of the ancient oil deposit area of the crude oil cracking gas reservoir;
and calculating the area of the crude oil pyrolysis gas reservoir ancient oil reservoir by using a calculation formula of the crude oil pyrolysis gas reservoir ancient oil reservoir area.
7. The apparatus of claim 6, wherein the crude oil pyrolysis gas reservoir paleor reservoir area is calculated by the formula:
wherein Ao is the area of the original oil reservoir and the unit is m2(ii) a Ag is the gas-containing area of the present gas reservoir, m2；XmThe crude oil cracking rate is the percentage of the total mass of the generated natural gas in the mass of the crude oil; b isoiIs the volume coefficient of crude oil; rhogThe density of the natural gas under the ground standard condition is 0.667kg/m3；ρoThe density of petroleum under the ground standard conditions is expressed in kg/m3；ρbIs the density of the asphalt in kg/m3；ZiThe deviation coefficient of the original gas is taken as the deviation coefficient of the original gas; pscThe standard pressure of the ground is 0.101 MPa; t is the formation temperature, K; piIs the gas reservoir formation pressure, MPa; t isscStandard temperature at ground level, 293K.
8. The apparatus of claim 5, wherein the crude oil has a volume factor BoiThe calculation formula of (2) is as follows:
Boi＝0.972+1.1213×10-2F1.175
wherein R issIs the volume ratio of dissolved gas to oil; ro is the relative density of the ground degassed crude oil; rg is the relative density of the gas in the separator, and the density of the air is 1.0kg/m3(ii) a And T is the formation temperature read according to the depth of the ancient oil reservoir determined according to the burying history, and the unit is K.
9. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of any one of claims 1 to 4 when executing the computer program.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program for executing the method of any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011181323.7A CN114429026A (en) | 2020-10-29 | 2020-10-29 | Method and device for calculating ancient oil reservoir area of crude oil pyrolysis gas reservoir |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011181323.7A CN114429026A (en) | 2020-10-29 | 2020-10-29 | Method and device for calculating ancient oil reservoir area of crude oil pyrolysis gas reservoir |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114429026A true CN114429026A (en) | 2022-05-03 |
Family
ID=81308964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011181323.7A Pending CN114429026A (en) | 2020-10-29 | 2020-10-29 | Method and device for calculating ancient oil reservoir area of crude oil pyrolysis gas reservoir |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114429026A (en) |
-
2020
- 2020-10-29 CN CN202011181323.7A patent/CN114429026A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10909281B2 (en) | History matching of hydrocarbon production from heterogenous reservoirs | |
| CN105160146B (en) | Water drive characteristic relation chart generation method and device | |
| CN107132170A (en) | Method and device for determining stress sensitivity of reservoir | |
| Li et al. | Ensemble-based relative permeability estimation using B-spline model | |
| CN111706318B (en) | Method for determining distribution condition of residual oil of hypotonic reservoir | |
| CN104463345A (en) | Method and device for predicting stratum oil-water interface position | |
| CN114429026A (en) | Method and device for calculating ancient oil reservoir area of crude oil pyrolysis gas reservoir | |
| CN114544917B (en) | Method and device for determining natural gas loss of crude oil pyrolysis gas reservoir | |
| CN111241652B (en) | Method and device for determining viscosity of crude oil in stratum | |
| CN113552036A (en) | Method and device for determining oil-water relative permeability of medium-low pore permeability reservoir | |
| Li et al. | Delayed drainage of a largely deformed aquitard due to abrupt water head decline in adjacent aquifer | |
| CN113051697B (en) | Method and device for generating evolution history curve of pore pressure of ancient gas reservoir stratum | |
| CN116449423A (en) | Method, device, equipment and storage medium for analyzing single sand body configuration of braided river | |
| CN115271367A (en) | Plateau tunnel surrounding rock grading method, device, equipment and storage medium | |
| CN117744302A (en) | Permeability prediction method, apparatus, and computer-readable storage medium | |
| CN113914853B (en) | Method for determining water saturation of sandstone reservoir of deep water deposition system sand shale thin interbed | |
| CN112419493B (en) | Shale reservoir three-dimensional attribute model building method and device | |
| CN114544918B (en) | Method and device for evaluating sealing performance of crude oil pyrolysis gas reservoir | |
| Dakhelpour-Ghoveifel et al. | Prediction of gas-oil capillary pressure of carbonate rock using pore network modeling | |
| CN105572321A (en) | Method and device for determining hydrocarbon expulsion rate of hydrocarbon source rock | |
| CN116415387A (en) | Quantitative calculation method and system for original petroleum reserves of ancient reservoirs | |
| CN111307652B (en) | Method and device for determining adsorption gas amount | |
| CN112746839B (en) | Method and device for determining volume coefficient of crude oil | |
| CN113900143B (en) | Method and device for determining attribute characteristics of natural gas hydrate and server | |
| CN113536201B (en) | Method and device for determining volume coefficient of natural gas in condensate gas reservoir |
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 |