CN114441370A - Method for calculating hydrocarbon generation amount and hydrocarbon discharge amount by using invalid organic carbon - Google Patents
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- 229930195733 hydrocarbon Natural products 0.000 title claims abstract description 303
- 150000002430 hydrocarbons Chemical class 0.000 title claims abstract description 297
- 239000004215 Carbon black (E152) Substances 0.000 title claims abstract description 283
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 69
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 56
- 239000011435 rock Substances 0.000 claims abstract description 189
- 238000000197 pyrolysis Methods 0.000 claims abstract description 19
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- 238000011156 evaluation Methods 0.000 claims description 6
- 125000001183 hydrocarbyl group Chemical group 0.000 claims description 6
- 238000004227 thermal cracking Methods 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 abstract description 24
- 238000004868 gas analysis Methods 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 abstract 1
- 238000005056 compaction Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
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- 230000008569 process Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000005416 organic matter Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
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- 230000015572 biosynthetic process Effects 0.000 description 1
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- 238000010276 construction Methods 0.000 description 1
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Abstract
The invention belongs to the field of oil field exploration, and particularly relates to a method for calculating hydrocarbon generation amount and hydrocarbon discharge amount by using invalid organic carbon. The invention establishes a hydrocarbon generation amount and a hydrocarbon discharge amount calculation method which can avoid the influence of fluid discharge by utilizing the content of ineffective organic carbon, the content of residual hydrocarbon and the content of thermally cracked hydrocarbon of pyrolysis parameters and according to the principle that the total amount of ineffective organic carbon in the source rock is not changed. The method of the invention only relates to two oil and gas analysis projects: pyrolysis and organic carbon determination, only three parameters need to be determined: residual hydrocarbon content, thermally cracked hydrocarbon content, and ineffective organic carbon content; only the present area, thickness, density data of the source rock are utilized. The method is simple, rapid and accurate in calculation.
Description
Technical Field
The invention belongs to the field of oil field exploration, and particularly relates to a method for calculating hydrocarbon generation amount and hydrocarbon discharge amount by using invalid organic carbon.
Background
The hydrocarbon generation amount and the hydrocarbon discharge amount are important parameters for evaluating the resource amount of a region or a petroleum production basin, and directly influence the knowledge of exploration potential and the exploration decision deployment.
Due to the irreproducibility of geological history, accurate calculation of the hydrocarbon amount and the hydrocarbon discharge amount is always a difficult problem, various calculation methods are provided according to the conditions of different regions, the influence of compaction, liquid discharge and the like on parameters in the evolution process of the hydrocarbon source rock cannot be well handled due to the fact that a reasonable reference system is not selected in the former method, and errors exist in calculation results. For example, the thermal simulation method is to simulate the hydrocarbon generation process by physical means such as temperature rise and pressure rise, establish the relationship between the hydrocarbon generation amount and the type, the evolution degree and the residual organic carbon content, calculate the hydrocarbon generation amount according to the change of the hydrocarbon amount generated in different evolution stages by unit mass of organic carbon of different types of samples, and subtract the residual hydrocarbon content of the source rock measured by pyrolysis method and the like by using the hydrocarbon generation amount to obtain the hydrocarbon discharge amount. However, the hydrocarbon generation amount and the hydrocarbon discharge amount obtained by the simulation of the method are changed relative to the organic carbon content, and even if the hydrocarbon source rock does not have hydrocarbon generation and discharge, the organic carbon content can be changed due to the change of the quality of the hydrocarbon source rock caused by the occurrence of compaction and liquid discharge, which cannot be solved by the simulation means, and a certain error exists in the calculation result; and the analysis period is long, and the cost is high (the single-point physical simulation time of a single sample is about 48 hours, and the multiple points are longer, and organic carbon determination, pyrolysis analysis or chloroform asphalt 'A' determination and the like are carried out at the later stage).
The Chinese invention patent CN106056459B discloses a dense oil source Rock grading evaluation standard dividing method based on hydrocarbon discharge efficiency, and the method utilizes a chemical kinetics method to evaluate the hydrocarbon generation amount of source rocks on the basis of Rock-Eval and PY-GC experiments of the source rocks in a research area. The method is carried out on a Rock-Eval-II type pyrolysis instrument, and the temperature of a sample is increased from 200 ℃ to 600 ℃ at a constant speed according to certain heating rates, such as 10, 20, 30, 40 and 50 ℃/min. Recording the relationship between the product amount and the heating time in real time, accumulating and normalizing to obtain a hydrocarbon yield-temperature relationship curve for calibrating a chemical kinetic model of organic hydrocarbon generation, wherein the hydrocarbon generation amount calculation formula is as follows:
Qamount of hydrocarbon generation＝S×H×ρ×TOC0×I0 H×F
Wherein: weight of sxhx ρ -source rock; TOC0-original organic carbon content in source rock,%;
the original hydrocarbon generation potential per unit mass of organic matter, the F-hydrocarbon generation conversion rate.
Based on the principle of material balance, the hydrocarbon discharge amount of the hydrocarbon source rock is quantitatively evaluated:
Qamount of hydrocarbons discharged＝QAmount of hydrocarbon generation-QAmount of residual hydrocarbons
H, rho and TOC required by the step are changed under the influence of hydrocarbon discharge and compaction discharge liquid in the evolution process of the hydrocarbon source rock, and a calculation formula Q is usedAmount of hydrocarbon generation＝S×H×ρ×TOC0×I0 HXf does not define whether H, ρ (source rock thickness and density) are parameters of the original source rock or the present source rock: if the H and rho are parameters of the original source rock, because the evolution of the source rock has changed, the current means cannot be directly measured and must be approximately obtained by other methods, which brings uncertainty to the calculation result; if H, ρ present source rock parameters, it is associated with the TOC of the original source rock0And the calculation models are not in the same space-time, so that the calculation models have defects, and the calculation results have errors. In addition, the method has complex steps, F can be calculated only by obtaining relevant parameters of hydrocarbon generation dynamics and data such as temperature and time in the hydrocarbon source rock evolution process, and the rapid evaluation of hydrocarbon generation amount and hydrocarbon discharge amount cannot be realized.
The Chinese patent application CN107870373A discloses a superposed basin multi-period discontinuous hydrocarbon generation potential evaluation method, which needs to evaluate the spreading condition of an overlying stratum of a hydrocarbon source rock, calculate the degradation amount of the overlying degraded stratum of the hydrocarbon source rock, recover a prototype basin layer by layer, determine the burying history, the geothermal history and the hydrocarbon generation history of the hydrocarbon source rock by using the analysis results and combining a basin simulation technology, determine a secondary hydrocarbon generation mode, finally calculate the hydrocarbon generation amount of a construction unit at different periods and evaluate the current hydrocarbon generation capability. The specific calculation method of the hydrocarbon generation amount of the hydrocarbon source rock is a volume method, and the calculation formula is as follows:
Qhydrocarbon generation＝S×H×ρ×TOC0×I0 H×F
Wherein Q hydrocarbon generation is hydrocarbon generation amount of hydrocarbon source layer, and oil gas is calculated separately and has an oil unit of 104t, in units of 10 for gas8m3(ii) a S is the area of the source rock entering the hydrocarbon generation threshold, km2(ii) a H is the thickness of the source rock entering the hydrocarbon generation threshold, m; rho is the density of the hydrocarbon source rock in g/cm3；TOC0The abundance of original organic matter of the source rock is percent; i is0Calculating the original hydrocarbon generation potential of the source rock, wherein the calculated oil is g/gTOC, and the calculated gas is cm3(iv) gTOC; f is organic matter hydrocarbon conversion rate,%; a is a unit conversion factor, 10 when calculating oil4Gas time is 106. Like the above analysis, the method does not define whether H and ρ (thickness and density of the source rock) are parameters of the original source rock or the current source rock, and the calculation result has large errors.
Therefore, it is still necessary to solve the problems in the art to provide a method for determining the hydrocarbon generation amount and the hydrocarbon discharge amount, which has the advantages of small calculation error, more accurate result and simpler operation.
Disclosure of Invention
The invention mainly aims to provide a method for calculating the hydrocarbon generation amount and the hydrocarbon discharge amount by utilizing invalid organic carbon, which is simple and rapid and can be used for calculating the hydrocarbon generation amount and the hydrocarbon discharge amount by utilizing the easily-obtained conventional analysis data, namely the content of the organic carbon, the content of residual hydrocarbon of pyrolysis parameters and the content of thermally cracked hydrocarbon according to the principle that the total amount of the invalid organic carbon in a hydrocarbon source rock is not changed.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a method for calculating hydrocarbon generation amount and hydrocarbon discharge amount by using invalid organic carbon, which comprises the following steps: selecting a hydrocarbon source rock sample; testing and analyzing the sample to obtain the residual hydrocarbon amount, the pyrolysis hydrocarbon amount and the ineffective organic carbon content of the sample; calculating the hydrocarbon generation amount and the hydrocarbon discharge amount of the hydrocarbon source rock of unit mass; and calculating the total hydrocarbon generation amount and the hydrocarbon discharge amount.
Preferably, a hydrocarbon source rock sample A of a layer to be evaluated and a hydrocarbon source rock sample B of an evolution starting point are selected.
Further preferably, the method for selecting the evolution starting point hydrocarbon source rock sample B comprises the following steps: and (3) taking a source rock sample which is the same as the sample A in layer position, the same type and low maturity, and if secondary hydrocarbon generation evaluation is carried out, selecting a source rock sample which is close to the secondary hydrocarbon generation starting point maturity, is the same as the sample A in layer position and the same type.
Preferably, the sample testing analysis method comprises:
step a, respectively measuring the residual hydrocarbon content and the thermal cracking hydrocarbon content of a sample by using a pyrolysis instrument;
and b, adding 5% dilute hydrochloric acid into the residual sample subjected to the pyrolysis analysis in the step a to remove inorganic carbon, and drying the sample and analyzing by using a carbon detector to obtain the content of the invalid organic carbon.
Preferably, the following sample test analysis methods are also employed:
step 1, respectively measuring the residual hydrocarbon content S of a sample by using a pyrolysis instrument1Content S of thermally cracked hydrocarbons2；
Step 2, measuring the total organic carbon TOC of the sample, and calculating the invalid organic carbon content C by using the following formulaw：
Cw＝TOC-(S1+S2)·0.083。
Further preferably, the residual hydrocarbon content is obtained by detecting a source rock sample at the constant temperature of 300 ℃ for 3min, and the unit is g hydrocarbon/kg rock; the content of thermally cracked hydrocarbon is obtained by detecting the temperature programming from 300 ℃ to 650 ℃, and the unit is g hydrocarbon/kg rock; or the content of thermally cracked hydrocarbons is measured by programming from 300 ℃ to 600 ℃ in g hydrocarbons/kg rock.
Preferably, the hydrocarbon production per unit mass of the hydrocarbon source rock of the layer to be evaluated is calculated as:
q＝(S2 B/CwB-S2 A/CwA)·CwA
the hydrocarbon discharge amount of the hydrocarbon source rock of the unit mass of the layer to be evaluated is as follows:
e＝q-(S1 A/CwA-S1 B/CwB)·CwA
wherein, q is the hydrocarbon generation amount of the hydrocarbon source rock of the unit mass of the layer to be evaluated, S1 AResidual hydrocarbon content of source rock per unit mass of the formation to be evaluated, S2 A-the content of thermally cracked hydrocarbons of the source rock per unit mass of the layer to be evaluated; s1 B-residual hydrocarbon content per unit mass of source rock at evolution starting point, S2 B-the thermally cracked hydrocarbon content per mass of source rock at the evolution starting point; cwA-percentage of ineffective organic carbon of source rock of the layer to be evaluated; cwB-percentage of ineffective organic carbon of source rock at the evolution starting point.
Preferably, the hydrocarbon generation amount Q of the hydrocarbon source rock of the layer to be evaluated is calculated by the formula:
Q＝q·M＝q·S·H·ρ
q＝(S2 B/CwB-S2 A/CwA)·CwA；
m, the quality of the hydrocarbon source rock of the layer to be evaluated, S, the area of the hydrocarbon source rock A of the layer to be evaluated, H, the thickness of the hydrocarbon source rock A of the layer to be evaluated, and rho, the density of the hydrocarbon source rock A of the layer to be evaluated.
q-hydrocarbon production amount per unit mass of hydrocarbon source rock, S, of layer to be evaluated1 AResidual hydrocarbon content of source rock per unit mass of the layer to be evaluated, S2 A-the content of thermally cracked hydrocarbons of the source rock per unit mass of the layer to be evaluated; s1 B-residual hydrocarbon content per unit mass of source rock at evolution starting point, S2 B-the thermally cracked hydrocarbon content per mass of source rock at the evolution starting point; cwA-percentage of ineffective organic carbon of source rock of the layer to be evaluated; cwB-percentage of ineffective organic carbon of source rock at the evolution starting point.
Preferably, the hydrocarbon source rock hydrocarbon discharge amount E of the layer to be evaluated is calculated by the formula:
E＝e·M＝e·S·H·ρ
e＝q-(S1 A/CwA-S1 B/CwB)·CwA；
q＝(S2 B/CwB-S2 A/CwA)·CwA；
m, the quality of the hydrocarbon source rock of the layer to be evaluated, S, the area of the hydrocarbon source rock A of the layer to be evaluated, H, the thickness of the hydrocarbon source rock A of the layer to be evaluated, and rho, the density of the hydrocarbon source rock A of the layer to be evaluated.
Wherein q is the hydrocarbon generation amount of the hydrocarbon source rock of the layer to be evaluated per unit mass, e is the hydrocarbon discharge amount of the hydrocarbon source rock of the layer to be evaluated per unit mass, and S1 AResidual hydrocarbon content of source rock per unit mass of the layer to be evaluated, S2 A-the content of thermally cracked hydrocarbons of the source rock per unit mass of the layer to be evaluated; s1 B-residual hydrocarbon content per unit mass of source rock at evolution starting point, S2 B-the thermally cracked hydrocarbon content per mass of source rock at the evolution starting point; cwA-percentage of ineffective organic carbon of source rock of the layer to be evaluated; cwB-percentage of ineffective organic carbon of source rock at the evolution starting point.
Compared with the prior art, the invention has the following advantages:
according to the method, an invalid organic carbon parameter is introduced in the calculation, and the total amount of the parameter is unchanged in the evolution of the source rock, so that the comparison is carried out, the influence of the change of the parameters such as organic carbon content (TOC) and the like along with the evolution of the source rock is avoided, and the calculation result is more accurate.
The method is simple, only two oil gas analysis items of pyrolysis and organic carbon are involved in the method, and only the content of residual hydrocarbon, the content of pyrolysis hydrocarbon and the content of ineffective organic carbon are required to be measured; only the present area, thickness, density data of the source rock need be utilized. Therefore, the method can realize the rapid calculation of the hydrocarbon generation amount and the hydrocarbon discharge amount of the hydrocarbon source rock.
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The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a flow chart of a method for calculating the hydrocarbon production and the hydrocarbon discharge of a hydrocarbon source rock using an ineffective organic carbon according to an embodiment of the present invention.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of the stated features, steps, operations, and/or combinations thereof, unless the context clearly indicates otherwise.
In order to make the technical solutions of the present invention more clearly understood by those skilled in the art, the technical solutions of the present invention will be described in detail below with reference to specific embodiments.
Example 1 method for calculating the amount of hydrocarbon generation and the amount of hydrocarbon emission using the ineffective organic carbon
As shown in fig. 1, the method for calculating the hydrocarbon generation amount and the hydrocarbon discharge amount of the hydrocarbon source rock by using the invalid organic carbon comprises the following steps:
step a, the residual hydrocarbon content (set as S) of the sample A is measured by a pyrolysis instrument1 AThe content of thermal cracking hydrocarbon (set as S) is determined by detecting a hydrocarbon source rock sample at a constant temperature of 300 ℃ for 3min, and the unit is g hydrocarbon/kg rock2 AMeasured from 300 ℃ temperature programmed to 650 ℃ in g hydrocarbons/kg rock).
Step b, adding 5% dilute hydrochloric acid into the residual sample subjected to the pyrolysis analysis in the step a to remove inorganic carbon, drying the sample, and analyzing by using a carbon detector to obtain the content of ineffective organic carbon (set as Cw)A)。
Step c, testing the residual hydrocarbon content (S) of the obtained sample B by the same method of the step a and the step B1 B) Content of thermally cracked hydrocarbons (S)2 B) Ineffective organic carbon content (Cw)B)。
and (3) evolving the hydrocarbon source rock of the layer to be evaluated from B to A, and calculating the hydrocarbon generation amount of the hydrocarbon source rock per unit mass as follows: q ═ S2 B/CwB-S2 A/CwA)·CwA(ii) a The hydrocarbon discharge amount of the hydrocarbon source rock per unit mass is as follows:
e＝q-(S1 B/CwB-S1 A/CwA)·CwA。
104, calculating the hydrocarbon generation quantity Q of the hydrocarbon source rock of the layer to be evaluated according to the formula:
Q＝q·M＝q·S·H·ρ
the hydrocarbon source rock hydrocarbon discharge amount E of the layer to be evaluated is calculated according to the formula:
E＝e·M＝e·S·H·ρ。
m, the quality of the hydrocarbon source rock of the layer to be evaluated, S, the area of the hydrocarbon source rock A of the layer to be evaluated, H, the thickness of the hydrocarbon source rock A of the layer to be evaluated, and rho, the density of the hydrocarbon source rock A of the layer to be evaluated.
The rationality of the calculations of step 103 and step 104 is demonstrated as follows:
setting the evolution initial point B (low evolution stage) of the source rock as the total mass RB ＝SB·HB·ρB(area S of B-stage of Source rockBThickness HBAnd density rhoBProduct of) containing total ineffective organic carbon CzwB(CzwB/RBCorresponding to the ineffective organic carbon content CwB) The potential convertible hydrocarbon amount ChB(ChB/RBEquivalent to thermally cracking hydrocarbonsContent S2 B) Residual hydrocarbon HcB(HcB/RBCorresponding to a residual hydrocarbon content S1 B) Rock skeleton MBAqueous solution W in rockB(ii) a Total mass R of Source rock evolving to AA ＝S H rho (product of area S, thickness H and density rho of A stage of source rock) containing total invalid organic carbon CzwA＝CzwA(CzwA/RAEquivalent to CwA) Potential convertible Hydrocarbon amount ChA(ChA/RACorresponding to the thermally cracked hydrocarbon content S2 ACh as the source rock evolves from B to AAHas been partially transformed, so ChA<ChB) Residual hydrocarbon content HcA(HcA/RACorresponding to a residual hydrocarbon content S1 A) Rock skeleton MA＝MBAqueous solution W in rockA(since the source rock evolves from A to B, W after compaction drainageA≤WB)。
The theoretical value of the total hydrocarbon amount generated by the hydrocarbon source rock from the stage B to the stage A is ChB-ChA。
The amount of hydrocarbon produced per unit mass of the source rock is calculated according to step 103 of the method of the invention
q＝[(ChB/RB)/(CzwB/RB)-(ChA/RA)/(CzwA/RA)]·(CzwA/RA)＝(ChB-ChA)/RA
The total hydrocarbon production Q ═ Q · S · H · ρ ═ Q · R is calculated according to inventive method step 104A＝ChB-ChAIn the calculation of RAAnd RBContains unequal amounts of water solution and hydrocarbon, but utilizes total ineffective organic carbon CzwA＝CzwBFor bridges, the calculation result eliminates RBThe effect of compaction liquid discharge is equivalently eliminated, and the method is consistent with a theoretical value.
Similarly, the theoretical value of the discharged hydrocarbon amount is ChB-ChA-(HcA-HcB)。
The amount of hydrocarbons removed per unit mass of source rock is calculated according to step 103 of the method of the present invention
e＝q-s＝[(ChB/RB)/(CzwB/RB)-(ChA/RA)/(CzwA/RA)]·(CzwA/RA)-[(Hc1 A/RA)/(CzwA/RA)-(Hc1 B/RB)/(CzwB/RB))·CzwA/RA＝(ChB-ChA-HcA+HcB)/RA
The total hydrocarbon removal E-e.s.h.p-e.r is calculated according to step 104 of the method of the inventionA＝ChB-ChA-(HcA-HcB) And the calculation result eliminates the influence of compaction and liquid discharge and is consistent with the theoretical value.
The analysis shows that the calculation method is more reasonable in theory and the obtained result is more accurate.
Example 2 method for calculating amount of hydrocarbon generation and amount of hydrocarbon emission Using ineffective organic carbon
The method comprises the following steps:
step 1, selecting a sample: selecting a hydrocarbon source rock sample A of a layer to be evaluated; and selecting an evolution initial point source rock sample B, and selecting a source rock sample with the same layer, the same type and low maturity as the sample A.
Step 2, testing and analyzing the sample to obtain the content of residual hydrocarbon, the content of thermally cracked hydrocarbon and the content of ineffective organic carbon of the sample: step a, the residual hydrocarbon content (set as S) of the sample A is measured by a pyrolysis instrument1 AThe content of thermal cracking hydrocarbon (set as S) is determined by detecting a hydrocarbon source rock sample at a constant temperature of 300 ℃ for 3min, and the unit is g hydrocarbon/kg rock2 AMeasured from 300 ℃ temperature programmed to 600 ℃ in g hydrocarbons/kg rock).
Step b, directly measuring the total organic carbon content (TOC) of the sampleA) The ineffective organic carbon content was calculated according to the following formula:
CwA＝TOCA-(S1 A+S2 A)·0.083。
step c, adopting the step a and the stepB residual hydrocarbon content (S) of sample B obtained by the same method1 B) Content of thermally cracked hydrocarbons (S)2 B) Ineffective organic carbon content (Cw)B)。
Step 3, calculating the hydrocarbon generation amount and the hydrocarbon discharge amount of the hydrocarbon source rock in unit mass:
and (3) evolving the hydrocarbon source rock of the layer to be evaluated from B to A, and calculating the hydrocarbon generation amount of the hydrocarbon source rock per unit mass as follows: q ═ S2 B/CwB-S2 A/CwA)·CwA(ii) a The hydrocarbon discharge amount of the hydrocarbon source rock per unit mass is as follows:
e＝q-(S1 B/CwB-S1 A/CwA)·CwA。
and 4, calculating the hydrocarbon generation quantity Q of the hydrocarbon source rock of the layer to be evaluated according to the formula:
Q＝q·M＝q·S·H·ρ
the hydrocarbon source rock hydrocarbon discharge amount E of the layer to be evaluated is calculated according to the formula:
E＝e·M＝e·S·H·ρ。
m represents the quality of the hydrocarbon source rock of the layer to be evaluated, S represents the area A of the hydrocarbon source rock of the layer to be evaluated, H represents the thickness A of the hydrocarbon source rock of the layer to be evaluated, and rho represents the density A of the hydrocarbon source rock of the layer to be evaluated.
Example 3 method for calculating amount of produced hydrocarbons and amount of discharged hydrocarbons by using invalid organic carbon
The method comprises the following steps:
step 1, selecting a sample: selecting a hydrocarbon source rock sample A of a layer to be evaluated; selecting an evolution initial point hydrocarbon source rock sample B, relating to secondary hydrocarbon evaluation, and selecting a hydrocarbon source rock sample which is close to the secondary hydrocarbon generation initial point maturity, has the same layer as the sample A and is of the same type.
Step 2, testing and analyzing the sample to obtain the residual hydrocarbon content, the thermally cracked hydrocarbon content and the ineffective organic carbon content of the sample: step a, the residual hydrocarbon content (set as S) of the sample A is measured by a pyrolysis instrument1 AThe content of thermal cracking hydrocarbon (set as S) is determined by detecting a hydrocarbon source rock sample at a constant temperature of 300 ℃ for 3min, and the unit is g hydrocarbon/kg rock2 AMeasured from 300 ℃ temperature programmed to 600 ℃ in g hydrocarbons/kg rock).
Step (ii) ofb, directly measuring the total organic carbon content (TOC) of the sampleA) The ineffective organic carbon content was calculated according to the following formula:
CwA＝TOCA-(S1 A+S2 A)·0.083。
step c, testing the residual hydrocarbon content (S) of the obtained sample B by the same method of the step a and the step B1 B) Content of thermally cracked hydrocarbons (S)2 B) Ineffective organic carbon content (Cw)B)。
Step 3, calculating the hydrocarbon generation amount and the hydrocarbon discharge amount of the hydrocarbon source rock in unit mass:
and (3) evolving the hydrocarbon source rock of the layer to be evaluated from B to A, and calculating the hydrocarbon generation amount of the hydrocarbon source rock of unit mass as follows: q ═ S2 B/CwB-S2 A/CwA)·CwA(ii) a The hydrocarbon discharge amount of the hydrocarbon source rock per unit mass is as follows:
e＝q-(S1 B/CwB-S1 A/CwA)·CwA。
and 4, calculating the hydrocarbon generation quantity Q of the hydrocarbon source rock of the layer to be evaluated according to the formula:
Q＝q·M＝q·S·H·ρ
the hydrocarbon source rock hydrocarbon discharge amount E of the layer to be evaluated is calculated according to the formula:
E＝e·M＝e·S·H·ρ。
m, the quality of the hydrocarbon source rock of the layer to be evaluated, S, the area of the hydrocarbon source rock A of the layer to be evaluated, H, the thickness of the hydrocarbon source rock A of the layer to be evaluated, and rho, the density of the hydrocarbon source rock A of the layer to be evaluated.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. A method for calculating the hydrocarbon generation amount and the hydrocarbon discharge amount by using the ineffective organic carbon, which is characterized by comprising the following steps: selecting a hydrocarbon source rock sample; testing and analyzing the sample to obtain the residual hydrocarbon content, the thermally cracked hydrocarbon content and the ineffective organic carbon content of the sample; calculating the hydrocarbon generation amount and the hydrocarbon discharge amount of the hydrocarbon source rock of unit mass; and calculating the total hydrocarbon generation amount and the total hydrocarbon discharge amount.
2. The method as claimed in claim 1, wherein a source rock sample A and an evolution starting point source rock sample B of the layer to be evaluated are selected.
3. The method of claim 2, wherein the evolution starting point source rock sample B is selected by: and selecting a source rock sample which has the same layer as the sample A, the same type and low maturity.
4. The method of claim 3, wherein if the secondary hydrocarbon evaluation is performed, a source rock sample having a maturity of the same level and type as that of sample A is selected.
5. The method of claim 1, wherein the sample testing and analyzing method comprises:
step a, respectively measuring the residual hydrocarbon content and the thermal cracking hydrocarbon content of a sample by using a pyrolysis instrument;
and b, adding 5% dilute hydrochloric acid into the residual sample subjected to the pyrolysis analysis in the step a to remove inorganic carbon, and drying the sample and analyzing by using a carbon detector to obtain the content of the invalid organic carbon.
6. The method of claim 1, wherein the following sample test analysis methods are also used:
step 1, respectively measuring the residual hydrocarbon content S of a sample by using a pyrolysis instrument1Content S of thermally cracked hydrocarbons2；
Step 2, measuring the total organic carbon TOC of the sample, and calculating the invalid organic carbon content C by using the following formulaw：
Cw＝TOC-(S1+S2)·0.083。
7. The method according to claim 5 or 6, wherein the residual hydrocarbon content is determined by testing a sample of the source rock at 300 ℃ for 3min, and the unit is g hydrocarbon/kg rock; the content of thermally cracked hydrocarbons was measured from 300 ℃ temperature programming to 650 ℃ or from 300 ℃ temperature programming to 600 ℃ in grams of hydrocarbons per kg of rock.
8. The method according to claim 1, wherein the amount of hydrocarbons produced from the hydrocarbon source rock per unit mass of the layer to be evaluated is calculated as:
q＝(S2 B/CwB-S2 A/CwA)·CwA
the hydrocarbon discharge amount of the rock per unit mass of the layer to be evaluated is as follows:
e＝q-(S1 B/CwB-S1 A/CwA)·CwA
wherein q is the hydrocarbon generation amount of the hydrocarbon source rock of the layer to be evaluated per unit mass, e is the hydrocarbon discharge amount of the hydrocarbon source rock of the layer to be evaluated per unit mass, and S1 AResidual hydrocarbon content of source rock per unit mass of the layer to be evaluated, S2 A-the content of thermally cracked hydrocarbons of the source rock per unit mass of the layer to be evaluated; s1 B-residual hydrocarbon content per unit mass of source rock at evolution starting point, S2 B-the thermally cracked hydrocarbon content per mass of source rock at the evolution starting point; cwA-percentage of ineffective organic carbon of source rock of the layer to be evaluated; cwB-percentage of ineffective organic carbon of source rock at the evolution starting point.
9. The method of claim 1, wherein the hydrocarbon-producing amount Q of the hydrocarbon source rock of the layer to be evaluated is calculated by the formula:
Q＝q·M＝q·S·H·ρ
q＝(S2 B/CwB-S2 A/CwA)·CwA；
m, the quality of the hydrocarbon source rock of the layer to be evaluated, S, the area of the hydrocarbon source rock A of the layer to be evaluated, H, the thickness of the hydrocarbon source rock A of the layer to be evaluated, and rho, the density of the hydrocarbon source rock A of the layer to be evaluated;
q-formation of hydrocarbon source rock per unit mass of layer to be evaluatedAmount of hydrocarbons, S2 A-the content of thermally cracked hydrocarbons of the source rock per unit mass of the layer to be evaluated; s2 B-the thermally cracked hydrocarbon content per mass of source rock at the evolution starting point; cwA-percentage of ineffective organic carbon of source rock of the layer to be evaluated; cwB-percentage of ineffective organic carbon of source rock at the evolution starting point.
10. The method according to claim 1, wherein the hydrocarbon source rock hydrocarbon expulsion amount E of the layer to be evaluated is calculated by the formula:
E＝e·M＝e·S·H·ρ
e＝q-(S1 A/CwA-S1 B/CwB)·CwA；
q＝(S2 B/CwB-S2 A/CwA)·CwA；
m, the quality of the hydrocarbon source rock of the layer to be evaluated, S, the area of the hydrocarbon source rock A of the layer to be evaluated, H, the thickness of the hydrocarbon source rock A of the layer to be evaluated, and rho, the density of the hydrocarbon source rock A of the layer to be evaluated;
wherein q is the hydrocarbon generation amount of the hydrocarbon source rock of the layer to be evaluated per unit mass, e is the hydrocarbon discharge amount of the hydrocarbon source rock of the layer to be evaluated per unit mass, and S1 AResidual hydrocarbon content of source rock per unit mass of the layer to be evaluated, S2 A-the content of thermally cracked hydrocarbons of source rocks per unit mass of the layer to be evaluated; s1 B-residual hydrocarbon content per unit mass of source rock at evolution starting point, S2 B-the thermally cracked hydrocarbon content per mass of source rock at the evolution starting point; cwA-percentage of ineffective organic carbon of source rock of the layer to be evaluated; cwB-percentage of ineffective organic carbon of source rock at the evolution starting point.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060003899A1 (en) * | 2002-12-02 | 2006-01-05 | Levey Simon J | Drilling fluid and methods of use thereof |
| CN104700316A (en) * | 2015-04-02 | 2015-06-10 | 中国石油大学(华东) | Anisotropism evaluation method for oil and gas generation quantity of shale |
| CN107687986A (en) * | 2017-08-28 | 2018-02-13 | 中国石油天然气股份有限公司 | Method for evaluating total organic carbon content in sedimentary rock |
| WO2019005583A1 (en) * | 2017-06-29 | 2019-01-03 | Saudi Arabian Oil Company | Pyrolysis to determine hydrocarbon expulsion efficiency of hydrocarbon source rock |
| CN109709299A (en) * | 2018-11-16 | 2019-05-03 | 中国石油天然气股份有限公司 | Organic carbon recovery coefficient evaluation method based on hydrocarbon generation and expulsion rate of hydrocarbon source rock |
| WO2020130668A1 (en) * | 2018-12-19 | 2020-06-25 | 한국지질자원연구원 | Method and device for evaluating initial total organic carbon by using molybdenum |
| US20200240972A1 (en) * | 2019-01-30 | 2020-07-30 | Saudi Arabian Oil Company | Measuring total organic content of source rock |
-
2020
- 2020-11-03 CN CN202011213263.2A patent/CN114441370B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060003899A1 (en) * | 2002-12-02 | 2006-01-05 | Levey Simon J | Drilling fluid and methods of use thereof |
| CN104700316A (en) * | 2015-04-02 | 2015-06-10 | 中国石油大学(华东) | Anisotropism evaluation method for oil and gas generation quantity of shale |
| WO2019005583A1 (en) * | 2017-06-29 | 2019-01-03 | Saudi Arabian Oil Company | Pyrolysis to determine hydrocarbon expulsion efficiency of hydrocarbon source rock |
| CN107687986A (en) * | 2017-08-28 | 2018-02-13 | 中国石油天然气股份有限公司 | Method for evaluating total organic carbon content in sedimentary rock |
| CN109709299A (en) * | 2018-11-16 | 2019-05-03 | 中国石油天然气股份有限公司 | Organic carbon recovery coefficient evaluation method based on hydrocarbon generation and expulsion rate of hydrocarbon source rock |
| WO2020130668A1 (en) * | 2018-12-19 | 2020-06-25 | 한국지질자원연구원 | Method and device for evaluating initial total organic carbon by using molybdenum |
| US20200240972A1 (en) * | 2019-01-30 | 2020-07-30 | Saudi Arabian Oil Company | Measuring total organic content of source rock |
Non-Patent Citations (2)
| Title |
|---|
| 李鹤永: "利用声波时差计算烃源岩排烃效率适用性分析-以苏北盆地高邮凹陷阜四段为例", 复杂油气藏, 30 June 2017 (2017-06-30), pages 7 - 9 * |
| 王雨薇等: "苏北盆地 W 凹陷阜四段烃源岩研究", 当代化工, 30 November 2014 (2014-11-30), pages 2439 * |
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