CN106803021A - A kind of evaluation method of the petroleum resources amount of routine and unconventional reservoir - Google Patents

Abstract

The invention provides a kind of routine and the evaluation method of the petroleum resources amount of unconventional reservoir.The method includes：According to hydrocarbon primary rock producing hydrocarbon potential index, row's hydrocarbon rate of hydrocarbon source rock is obtained；Row's hydrocarbon rate according to hydrocarbon source rock, obtains hydrocarbon source rock row's hydrocarbon intensity；Hydrocarbon intensity is arranged according to hydrocarbon source rock, hydrocarbon source rock Hydrocarbon yield is obtained；According to hydrocarbon source rock Hydrocarbon yield, conventional, the petroleum resources amount of compact reservoir outside source is obtained；According to lighter hydrocarbons compensation correction formula, residual liquid hydrocarbon rate in acquisition source；According to residual liquid hydrocarbon rate in source, residual liquid hydrocarbon amount in source is obtained；According to residual gas-oil ratio, residual gaseous hydrocarbon rate in acquisition source；According to residual gaseous hydrocarbon rate in source, residual gaseous hydrocarbon amount in source is obtained；According to residual gaseous hydrocarbon amount in residual liquid hydrocarbon amount in source and source, obtain remaining oil gas stock number in source；According to oil gas stock number is remained in compact reservoir petroleum resources amount outside source and source, unconventional petroleum resources amount is obtained, complete the evaluation to routine and the petroleum resources amount of unconventional reservoir.

Description

A kind of evaluation method of the petroleum resources amount of routine and unconventional reservoir

Technical field

The present invention relates to a kind of Petroleum Resources Assessments, more particularly to a kind of routine and unconventional reservoir petroleum resources The evaluation method of amount, belongs to oil and gas resource evaluation technical field.

Background technology

Oil and gas resource evaluation is the important foundation for carrying out oilfield prospecting developing and decision rule.With Global Oil and Gas Resources Change, the discovery of frontier petroleum resources and the theoretical development of oil-gas geology of structure, to the thinking and method of resource assessment Requirements at the higher level are it is also proposed, to promote geological knowledge, preferably reflects petroleum resources present situation.

At present, about scholar with regard to having done many work on oil and gas resource evaluation, wherein relatively conventional resource assessment side Method mainly has three major types：Analogy method, statistic law, origin cause of formation method.

Analogy method：It is main to use the analogy method based on producing well ultimate recoverable reserves (EUR), while also amplify out one kind changing The MPAA methods entered, MPAA is a kind of method that piecemeal EUR analogy methods are combined with volumetric method, by carrying out piecemeal analogy EUR, so The stock number for correcting prediction with bulk of reservoir rock afterwards is relatively reliable to make to predict the outcome.Analogy method is applied to exploration ground medium, higher Area, evaluation procedure is easy, quick, is disadvantageous in that key parameter is difficult to determine, does not take into full account that ultimate recoverable reserves is empty Between correlation.

Statistic law：Common statistic law has two kinds of volumetric method and Method of Stochastic.Volumetric method mainly (is analogized) with analogy Analysis be according to and unit geologic body is carried out stock number estimation with analysis, that is, carry out piecemeal evaluation；Stochastic simulation method is having well Area using sequence Gauss algorithm stochastic simulation method, using analogy method without wellblock, by analogy obtain EUR spatial relationship and Relevant parameter carries out multiple-point simulation.Statistic law is applied to low exploratory area, and evaluation procedure is easy, quick, is disadvantageous in that Do not consider that the key parameters such as air content, porosity have obvious anisotropism, the usual numerical value of evaluation result is higher, to basic geology The analysis precision requirement of data is high.

Origin cause of formation method：Common thermal simulation method and set up PHiK models.By to the growing amount of hydro carbons in hydrocarbon source rock, discharge rate and Adsorbance, migration quantity and scattering amount etc. are calculated, and determine the Hydrocarbons Accumulating Quantity in oil-gas reservoir.The method is low in being applied to, Middle exploratory area high, can systematically understand petroleum resources geology distribution characteristics and accumulation rule, be disadvantageous in that basin mould Plan process is complicated, and evaluation cycle is long.

Common oil and gas resource evaluation method method has certain scope of application above, it is impossible to realize to conventional and unconventional The comprehensive integrated evaluation of petroleum resources, and evaluation procedure is cumbersome, and evaluation cycle is more long.

The content of the invention

In order to solve the above-mentioned technical problem, it is an object of the invention to provide the oil gas money of a kind of routine and unconventional reservoir With petroleum resources geology distribution characteristics be combined Mathematical Modeling by the evaluation method of source amount, the evaluation method, can be with quantification Characterize conventional and unconventional petroleum resources amount.

In order to realize above-mentioned technical purpose, the invention provides commenting for a kind of routine and the petroleum resources amount of unconventional reservoir Valency method, the routine is comprised the following steps with the evaluation method of the petroleum resources amount of unconventional reservoir：

According to hydrocarbon primary rock producing hydrocarbon potential index, row's hydrocarbon rate of hydrocarbon source rock is obtained；

Row's hydrocarbon rate according to hydrocarbon source rock, obtains hydrocarbon source rock row's hydrocarbon intensity；

Hydrocarbon intensity is arranged according to hydrocarbon source rock, hydrocarbon source rock Hydrocarbon yield is obtained；

According to hydrocarbon source rock Hydrocarbon yield, obtain the petroleum resources amount of conventional reservoir outside source, outside source compact reservoir petroleum resources Amount；

Lighter hydrocarbons compensation correction formula is set up, according to lighter hydrocarbons compensation correction formula, residual liquid hydrocarbon rate in acquisition source；

According to residual liquid hydrocarbon rate in the source, residual liquid hydrocarbon amount in source is obtained；

Obtain remaining gas-oil ratio, residual gaseous hydrocarbon rate in acquisition source by hydrocarbon thermal simulation experiment；

According to residual gaseous hydrocarbon rate in source, residual gaseous hydrocarbon amount in source is obtained；

According to residual gaseous hydrocarbon amount in residual liquid hydrocarbon amount in source and source, obtain remaining oil gas stock number in source；

According to oil gas stock number is remained in compact reservoir petroleum resources amount outside source and source, unconventional petroleum resources amount is obtained, Complete the evaluation to routine and the petroleum resources amount of unconventional reservoir.

In the evaluation method of routine of the invention and the petroleum resources amount of unconventional reservoir, hydrocarbon primary rock producing hydrocarbon potential index Obtained according to source rock sample Pyrolysis Experiment, be characterized as (S₁+S₂)/TOC, unit is mg HC/g TOC.Wherein, S₁It is by unit Quality source rock sample is heated to the hydrocarbon amount obtained during 300 DEG C, and unit is mg HC/g rock samples；S₂It is by unit mass hydrocarbon Source rock sample is heated to the hydrocarbon amount obtained at 300 DEG C -600 DEG C, and unit is mg HC/g rock samples；TOC represents unit mass hydrocarbon source rock In total content of organic carbon, unit mg/g rock samples.

In the evaluation method of routine of the invention and the petroleum resources amount of unconventional reservoir, it is preferable that according to hydrocarbon source rock Hydrocarbon generation potential index, when obtaining row's hydrocarbon rate of hydrocarbon source rock, follows the steps below：

Set up hydrocarbon primary rock producing hydrocarbon potential index and maturity of organic matter index R_oHydrocarbon primary rock producing hydrocarbon potential index section；

According to hydrocarbon primary rock producing hydrocarbon potential index section, hydrocarbon source rock row's hydrocarbon rate model is set up, obtain row's hydrocarbon rate of hydrocarbon source rock：

Pg_e=Pg_o-Pg_r；

Pg_o=k×Pg⁰；

Wherein, Pg_rIt is residual hydrocarbon generation potential index, mg HC/g TOC；

Pg⁰It is hydrocarbon primary rock producing hydrocarbon potential index, mg HC/g TOC at row's hydrocarbon thresholding；

Pg_oIt is the original hydrocarbon generation potential index of hydrocarbon source rock, mg HC/g TOC；

Pg_eIt is row's hydrocarbon rate of hydrocarbon source rock, mg HC/g TOC.

In above-mentioned hydrocarbon source rock row hydrocarbon rate model of the invention, hydrocarbon primary rock producing hydrocarbon potential index (S₁+S₂The bag of)/TOC sections Hydrocarbon generation potential index value on winding thread, is characterized as Pg_r, tested according to hydrocarbon source rock pyrolysis and organic carbon determination and obtained；

According to material balance principle, the original hydrocarbon generation potential index Pg after recovery_oWith residual hydrocarbon generation potential index Pg_rDifference As row's hydrocarbon rate Pg_e；

Hydrocarbon primary rock producing hydrocarbon potential index (S₁+S₂In)/TOC sections, the value at row's hydrocarbon thresholding on corresponding envelope is Pg⁰。 On row's hydrocarbon thresholding, rock is in undersaturated condition, only meets after absorption, residual, the dissolved hydrocarbon amount of itself, and oil gas is Can largely discharge.Become big with Ro as depth increases, when reaching row's hydrocarbon thresholding, oil gas starts a large amount of discharge.Now arrange hydrocarbon thresholding Locate the maximum hydrocarbon potentiality that corresponding hydrocarbon generation potential index is residual, be designated as Pg⁰(Peng J.W.,Pang X.Q.,Shi H.S.,et al.Hydrocarbon generation and expulsion characteristics of Eocene source rocks in the Huilu area,northern Pearl River Mouth basin,South China Sea:implications for tight oil potential[J].Marine&Petroleum Geology,2016,72: 463-487.)。

In the evaluation method of routine of the invention and the petroleum resources amount of unconventional reservoir, it is preferable that according to hydrocarbon source rock Row's hydrocarbon rate, according to equation below, obtain hydrocarbon source rock row hydrocarbon intensity：

Wherein, I_peFor hydrocarbon source rock arranges hydrocarbon intensity, × 10⁸m³/km²；

Pg_eIt is row's hydrocarbon rate of hydrocarbon source rock, mg HC/g TOC；

H is hydrocarbon source rock thickness, m；

ρ is hydrocarbon source rock density, g/cm³；

TOC is total content of organic carbon, %；

R_oIt is reflectance of vitrinite, %；

R_o1It is corresponding reflectance of vitrinite, % at row's hydrocarbon thresholding；

R_o′It is actual reflectance of vitrinite, % under row's hydrocarbon thresholding.

In the evaluation method of routine of the invention and the petroleum resources amount of unconventional reservoir, it is preferable that according to hydrocarbon source rock Row's hydrocarbon intensity, when obtaining hydrocarbon source rock Hydrocarbon yield, follows the steps below：

The fine and close lower limit of porosity Ф=12% is determined according to reservoir densification history, densification outside the outer conventional reservoir in source and source is divided Reservoir, correspondence is expelled to outside source the hydrocarbon amount in conventional reservoir on fine and close lower limit, and correspondence is expelled to outside source and causes under fine and close lower limit Hydrocarbon amount in close reservoir；

Foundation is expelled to outside source the hydrocarbon amount model Q in conventional reservoir_pec：

Foundation is expelled to outside source the hydrocarbon amount model Q in compact reservoir_pet：

Wherein, Q_pecTo be expelled to the Hydrocarbon yield of conventional reservoir outside source, × 10¹²m³；

Q_petTo be expelled to outside source the hydrocarbon amount in compact reservoir, × 10¹²m³；

Pg_eIt is row's hydrocarbon rate of hydrocarbon source rock, mg HC/g TOC；

H is hydrocarbon source rock thickness, m；

A is hydrocarbon source rock area, m²；

ρ is hydrocarbon source rock density, g/cm³；

TOC is total content of organic carbon, %；

R_oIt is reflectance of vitrinite, %；

R_o1It is corresponding reflectance of vitrinite, % at row's hydrocarbon thresholding；

R_o2It is the actual reflectance of vitrinite between row's hydrocarbon thresholding and fine and close lower limit, %；

R_o3It is corresponding reflectance of vitrinite, % at fine and close lower limit；

R_o4It is the actual reflectance of vitrinite under fine and close lower limit, %.

In the evaluation method of routine of the invention and the petroleum resources amount of unconventional reservoir, it is preferable that according to hydrocarbon source rock Hydrocarbon yield, according to equation below, obtain the petroleum resources amount of conventional reservoir outside source, outside source compact reservoir petroleum resources amount：

Q_c=Q_pec×μ_c

Q_t=Q_pet×μ_t

Wherein, Q_cIt is the petroleum resources amount of conventional reservoir outside source, × 10¹²m³；

Q_tIt is the petroleum resources amount of compact reservoir outside source, × 10¹²m³；

Q_pecTo be expelled to outside source the hydrocarbon amount in conventional reservoir, × 10¹²m³；

Q_petTo be expelled to outside source the hydrocarbon amount in compact reservoir, × 10¹²m³；

μ_cIt is the convergence factor of conventional reservoir outside source, %；

μ_tIt is the convergence factor of compact reservoir outside source, %.

In the evaluation method of routine of the invention and the petroleum resources amount of unconventional reservoir, it is preferable that lighter hydrocarbons compensate school Positive formula is：

B_k=0.81-0.65R_o+0.18R_o ²

Wherein, Pr_l′To be remained in hydrocarbon source rock including C₅₊In interior liquid hydrocarbon rate, mg HC/g TOC；

Pr_lIt is the residual liquid hydrocarbon rate surveyed in hydrocarbon source rock, refers generally to C₁₅₊Liquid hydrocarbon amount, mg HC/g TOC；

B_kIt is C in hydrocarbon source rock_5-14Component accounts for the liquid hydrocarbon total amount C of residual₅₊Percentage, %；

R_oIt is the reflectance of vitrinite of organic matrix in hydrocarbon source rock, %.

In rock remain hydrocarbon include liquid hydrocarbon and the class of gaseous hydrocarbon two, according to exist mode can be divided into adsorbed hydrocarbons, Three kinds of dissolved hydrocarbon and free hydrocarbon, commonly use the hydrocarbon amount " S that method for pyrolysis is obtained in production₁" summarize above-listed three kinds of forms residual hydrocarbons it is total Amount, when going out the pretreatment such as cylinder, Sample storage, drying, broken sample and heat due to rock core, the light fraction (C of residual hydrocarbons in sample₅- C₁₄) volatilized, in actual measurement S₁In do not embody, therefore need lighter hydrocarbons compensation correction, obtain including C₅₊In interior liquid hydrocarbon rate, with P_rl' parameter characterization.Therefore, the present invention is proposed using Pang Xiongqi (1993) lighter hydrocarbons compensation correction formula (Pang Xiongqi, oily basin Ground ground history, thermal history, life residence history numerical simulation study and hydrocarbon source rock quantitative assessment [M], 1993,71.).

In the evaluation method of routine of the invention and the petroleum resources amount of unconventional reservoir, it is preferable that according to residual in source Liquid hydrocarbon rate is stayed, according to equation below, residual liquid hydrocarbon amount in source is obtained：

Wherein, Q_rlResidual liquid hydrocarbon amount, × 10 in source¹²m³；

Pr_1′To be remained in hydrocarbon source rock including C₅₊In interior liquid hydrocarbon rate, mg HC/g TOC；

H is hydrocarbon source rock thickness, m；

A is hydrocarbon source rock area, m²；

ρ is hydrocarbon source rock density, g/cm³；

TOC is total content of organic carbon, %；

R_o5It is reflectance of vitrinite, % at hydrocarbon thresholding；

R_o′It is the reflectance of vitrinite under hydrocarbon thresholding, %.

In the evaluation method of routine of the invention and the petroleum resources amount of unconventional reservoir, it is preferable that by hydrocarbon heat Simulated experiment, using below equation, obtains residual gas-oil ratio：

Wherein, ω is residual gas-oil ratio；

q_gIt is factor of created gase, mg HC/g TOC；

q_oIt is oil productivity, mg HC/g TOC；

It is the efflux coefficient of gaseous hydrocarbon, %；

It is the efflux coefficient of liquid hydrocarbon, %；

Residual gaseous hydrocarbon rate in the source, obtains according to equation below：

Pr_g=Pr_l′×ω

Wherein, Pr_gIt is residual gaseous hydrocarbon rate in source, mg HC/g TOC；

Pr_l′To be remained in hydrocarbon source rock including C₅₊In interior liquid hydrocarbon rate, mg HC/g TOC；

ω is residual gas-oil ratio.

Specific embodiment of the invention, factor of created gase and oil productivity, obtain according to hydrocarbon thermal simulation experiment.By life Hydrocarbon thermal simulation experiment, be obtained in that under different pyrolysis temperatures (correspondence different Ro) the gaseous hydrocarbon amount of unit mass TOC generations and Liquid hydrocarbon amount, as factor of created gase and oil productivity, because the gentle efflux coefficient of oil is different, are respectively adopted different efflux coefficient meters Calculate, using above-mentioned formula, you can obtain residual gas-oil ratio.

In the evaluation method of routine of the invention and the petroleum resources amount of unconventional reservoir, it is preferable that according to residual in source Gaseous hydrocarbon rate is stayed, according to equation below, residual gaseous hydrocarbon amount in source is obtained：

Wherein, Q_rgIt is residual gaseous hydrocarbon amount, × 10 in source¹²m³；

Pr_gIt is residual gaseous hydrocarbon rate in source, mg HC/g TOC；

H is hydrocarbon source rock thickness, m；

A is hydrocarbon source rock area, m²；

ρ is hydrocarbon source rock density, g/cm³；

TOC is total content of organic carbon, %；

R_o5It is reflectance of vitrinite, % at hydrocarbon thresholding；

R_o′It is the reflectance of vitrinite under hydrocarbon thresholding, %.

In the evaluation method of routine of the invention and the petroleum resources amount of unconventional reservoir, it is preferable that according to residual in source Residual gaseous hydrocarbon amount in liquid hydrocarbon amount and the source is stayed, according to equation below, obtains remaining oil gas stock number in source：

Q_r=Q_rl×μ_l+Q_rg×μ_g

Wherein, Q_rTo remain oil gas stock number, × 10 in source¹²m³；

Q_rlIt is residual liquid hydrocarbon amount, × 10 in source¹²m³；

Q_rgIt is residual gaseous hydrocarbon amount, × 10 in source¹²m³；

μ_lIt is the convergence factor of residual liquid hydrocarbon in source, %；

μ_gIt is the convergence factor of residual gaseous hydrocarbon in source, %.

In the evaluation method of routine of the invention and the petroleum resources amount of unconventional reservoir, it is preferable that caused according to outside source Oil gas stock number is remained in close reservoir hydrocarbons stock number and source, according to equation below, unconventional petroleum resources amount is obtained：

Q_uc=Q_t+Q_r

Wherein, Q_ucIt is unconventional petroleum resources amount, × 10¹²m³；

Q_tIt is compact reservoir petroleum resources amount, × 10 outside source¹²m³；

Q_rTo remain oil gas stock number, × 10 in source¹²m³。

The evaluation method of the petroleum resources amount of routine of the invention and unconventional reservoir, first using hydrocarbon potentiality method synthesis Conventional gas and oil outside evaluation study area source, fine and close oil gas (such as tight sand oil gas) outside source, residual oil gas in source (such as shale oil gas, Coal seam oil gas) stock number.

Routine of the invention with the petroleum resources amount of unconventional reservoir evaluation method compared with existing evaluation method, tool Have the advantages that：

Recovered using hydrocarbon potentiality and lighter hydrocarbons compensation correction, original hydrocarbon potentiality and original residual liquid hydrocarbon are recovered respectively Rate, closer descends actual conditions；

Strengthen hydrocarbon source rock to re-recognize and finely dissect, set up the raw row of staying hydrocarbon Whole Process Simulation model；

Binding purpose layer hole oozing property distribution characteristics and source bed life residence history matching relationship, using compact reservoir lower limit (Ф =12%) distinguish densification petroleum resources outside the outer conventional gas and oil resource in source and source；

First using residual hydrocarbons gas-oil ratio in hydrocarbon thermal simulation experiment acquisition source, with reference to the original residual liquid hydrocarbon after correction Residual gaseous hydrocarbon rate in rate calculating source；

Overcoming traditional resource evaluation method can only individually evaluate the problem of routine or unconventional petroleum resources, to carry out It is conventional to provide basic geology model with unconventional resource assessment.

Brief description of the drawings

Fig. 1 is the routine of embodiment 1 and the evaluation method flow chart of the petroleum resources amount of unconventional reservoir.

Fig. 2 is the routine of embodiment 1 and the evaluation model figure of the petroleum resources amount of unconventional reservoir.

Fig. 3 is the Upper Paleozoic in Ordos Basin hydrocarbon primary rock producing hydrocarbon potential index of embodiment 1 with Ro variation diagrams.

Fig. 4 arranges hydrocarbon intensity map now for the Upper Paleozoic in Ordos Basin coal of embodiment 1.

Fig. 5 arranges hydrocarbon intensity map now for the Upper Paleozoic in Ordos Basin mud stone of embodiment 1.

Fig. 6 is residual liquid hydrocarbon rate figure in the Upper Paleozoic in Ordos Basin source of embodiment 1.

Fig. 7 is the Upper Paleozoic in Ordos Basin residual gas-oil ratio figure of embodiment 1.

Fig. 8 is residual gaseous hydrocarbon rate figure in the Upper Paleozoic in Ordos Basin source of embodiment 1.

Specific embodiment

In order to be more clearly understood to technical characteristic of the invention, purpose and beneficial effect, now to skill of the invention Art scheme carry out it is described further below, but it is not intended that to it is of the invention can practical range restriction.

Embodiment 1

Present embodiments provide the evaluation method of a kind of routine and the petroleum resources amount of unconventional reservoir, the evaluation method stream Journey figure is as shown in figure 1, the raw row's of staying hydrocarbon and evaluation model figure are as shown in Fig. 2 comprise the following steps that：

Step 1：Row's hydrocarbon rate is calculated according to hydrocarbon primary rock producing hydrocarbon potential index

Fig. 3 is Upper Paleozoic in Ordos Basin hydrocarbon primary rock producing hydrocarbon potential index with R_oVariation diagram, from top to bottom, with hydrocarbon source Rock maturity increases the increase of hydrocarbon potentiality, and hydro carbons starts discharge after maturity increases to row's hydrocarbon thresholding, and hydrocarbon potentiality gradually subtract It is small.By recovering row's hydrocarbon thresholding original hydrocarbon generation potential index in the past, being with reference to residual hydrocarbon generation potential index now can the row's of obtaining hydrocarbon Rate；

Hydrocarbon source rock row's hydrocarbon rate model (Pg is set up according to hydrocarbon generation potential index section_e) as follows：

Pg_e=Pg_o-Pg_r；

Pg_o=k × Pg₀；

Wherein, Pg_rIt is residual hydrocarbon generation potential index, mg HC/g TOC；Pg⁰For hydrocarbon primary rock producing hydrocarbon potentiality refer at row's hydrocarbon thresholding Number；Pg_oIt is the original hydrocarbon generation potential index of hydrocarbon source rock, mg HC/g TOC；Pg_eIt is row's hydrocarbon rate, mg HC/g TOC.The raw row of staying hydrocarbon mould Formula is as shown in Figure 2.

Step 2：Hydrocarbon source rock row's hydrocarbon intensity is obtained according to row's hydrocarbon rate

According to hydrocarbon source rock row's hydrocarbon rate, hydrocarbon source rock thickness, hydrocarbon source rock density, total content of organic carbon and mirror matter under differing maturity Volume reflectivity, integration determines row's hydrocarbon intensity；

Set up hydrocarbon source rock row's hydrocarbon strength model (I_pe) as follows：

Wherein, I_peIt is hydrocarbon source rock row hydrocarbon intensity, × 10 outside source⁸m³/km²；Pg_eIt is row's hydrocarbon rate, mg HC/g TOC；H is hydrocarbon Source rock thickness, m；ρ is hydrocarbon source rock density, g/cm³；TOC is total content of organic carbon, %；R_oIt is reflectance of vitrinite, %；R_olFor Corresponding reflectance of vitrinite, % at row's hydrocarbon thresholding；R_o′It is actual reflectance of vitrinite, % under row's hydrocarbon thresholding；

As shown in figure 4, for Upper Paleozoic in Ordos Basin coal arranges hydrocarbon intensity map now

As shown in figure 5, for Upper Paleozoic in Ordos Basin mud stone arranges hydrocarbon intensity map now.

Step 3：Hydrocarbon source rock Hydrocarbon yield is obtained according to row's hydrocarbon intensity

Fine and close lower limit (the R of porosity Ф=12% is determined according to reservoir densification history_oCharacterize), divide the outer conventional reservoir in source with Compact reservoir outside source, correspondence is expelled to outside source the hydrocarbon amount in conventional reservoir on fine and close lower limit, correspondence discharge under fine and close lower limit Hydrocarbon amount outside to source in compact reservoir；

Foundation is expelled to outside source the hydrocarbon amount model (Q in conventional reservoir_pec) as follows：

Foundation is expelled to outside source the hydrocarbon amount model (Q in compact reservoir_pet) as follows：

Wherein, Q_pecAnd Q_petRespectively it is expelled to conventional reservoir outside source, the hydrocarbon amount outside source in compact reservoir, × 10¹²m³； Pg_eIt is row's hydrocarbon rate, mg HC/g TOC；H is hydrocarbon source rock thickness, m；A is hydrocarbon source rock area, m²；ρ is hydrocarbon source rock density, g/cm³； TOC is total content of organic carbon, %；R_oIt is reflectance of vitrinite, %；R_o1It is corresponding reflectance of vitrinite, % at row's hydrocarbon thresholding； R_o2It is the actual reflectance of vitrinite between row's hydrocarbon thresholding and fine and close lower limit, %；R_o3For corresponding vitrinite is anti-at fine and close lower limit Penetrate rate, %；R_o4It is the actual reflectance of vitrinite under fine and close lower limit, %；

Be calculated hydrocarbon amount 24.7 that Upper Paleozoic in Ordos Basin hydrocarbon source rock is expelled to outside source in conventional reservoir × 10¹²m³, the hydrocarbon amount being expelled to outside source in compact reservoir is 246.9 × 10¹²m³。

Step 4：Conventional and compact reservoir petroleum resources amount outside source is obtained according to Hydrocarbon yield

The hydro carbons discharged from hydrocarbon source rock can lose during migration, and the oil and gas content of final Aggregation indica is small In the oil and gas content of discharge, therefore, the conventional hydrocarbon amount with compact reservoir outside source that will be expelled to is multiplied by respective convergence factor respectively Obtain the petroleum resources amount in conventional and compact reservoir outside source；

Set up the stock number model (Q in conventional reservoir outside source_c) as follows：

Q_c=Q_pec×μ_c；

Set up the stock number model (Q in compact reservoir outside source_t) as follows：

Q_t=Q_pet×μ_t；

Wherein, Q_cAnd Q_tConventional reservoir respectively outside source, the stock number outside source in compact reservoir, × 10¹²m³；Q_pecAnd Q_pet Respectively it is expelled to conventional reservoir outside source, the hydrocarbon amount outside source in compact reservoir, × 10¹²m³；μ_cAnd μ_tRespectively routinely stored up outside source Convergence factor outside layer, source in compact reservoir, %；

The convergence factor of oil gas will carry out value with reference to actual geological condition, and research area's degree of prospecting, geological conditions are different, Shale oil gas, coal seam oil gas, tight sand oil gas, conventional gas and oil are distinct, cause convergence factor value different, the money for obtaining Source amount result also can more general value have a relatively large deviation, therefore should fully be combined in value actual.

It is 7.4 × 10 to obtain the stock number outside Upper Paleozoic in Ordos Basin source in conventional reservoir¹²m³, fine and close storage outside source Stock number in layer is 8.6 × 10¹²m³。

Step 5：According to residual liquid hydrocarbon rate in lighter hydrocarbons compensation correction calculating source

In rock remain hydrocarbon include liquid hydrocarbon and the class of gaseous hydrocarbon two, according to exist mode can be divided into adsorbed hydrocarbons, 3 kinds of dissolved hydrocarbon and free hydrocarbon, commonly use the hydrocarbon amount " S that method for pyrolysis is obtained in production₁" summarize above-listed 3 kinds of forms residual hydrocarbons it is total Amount, when going out the pretreatment such as cylinder, Sample storage, drying, broken sample and heat due to rock core, the light fraction (C of residual hydrocarbons in sample₅- C₁₄) volatilized, in actual measurement S₁In do not embody, therefore need lighter hydrocarbons compensation correction；

Lighter hydrocarbons compensation correction formula is set up, residual liquid hydrocarbon rate (Pr is obtained_l′) as follows：

B_k=0.81-0.65R_o+0.18R_o ²；

Wherein, Pr_l′To be remained in hydrocarbon source rock including C₅₊In interior liquid hydrocarbon rate, mg HC/g TOC；Pr₁It is hydrocarbon source rock The residual liquid hydrocarbon rate of middle actual measurement, refers generally to C₁₅₊Liquid hydrocarbon amount, mg HC/g TOC；B_kIt is C in hydrocarbon source rock_5-14Component accounts for residual The liquid hydrocarbon total amount C for staying₅₊Percentage, %；R_oIt is the reflectance of vitrinite of organic matrix in hydrocarbon source rock, %；

As shown in fig. 6, being Liquid Residue in the Upper Paleozoic in Ordos Basin source being calculated according to lighter hydrocarbons compensation correction State hydrocarbon rate figure.

Step 6：Residual liquid hydrocarbon amount in source is obtained according to residual liquid hydrocarbon rate in source

Set up residual liquid hydrocarbon amount model (Q in source_rl) as follows：

Wherein, Q_rlResidual liquid hydrocarbon amount, × 10 in source¹²m³；Pr_l′To be remained in hydrocarbon source rock including C₅₊In interior liquid Hydrocarbon rate, mg HC/g TOC；H is hydrocarbon source rock thickness, m；A is hydrocarbon source rock area, m²；ρ is hydrocarbon source rock density, g/cm³；TOC is total Organic carbon content, %；R_o5It is reflectance of vitrinite, % at hydrocarbon thresholding；R_o′It is the vitrinite reflectance under hydrocarbon thresholding Rate, %.

It is calculated, residual liquid hydrocarbon amount is 35.49 × 10 in Upper Paleozoic in Ordos Basin source¹²m³(work as by oil gas Amount is scaled 354.9 × 10⁸t)。

Step 7：Obtained remaining gas-oil ratio, residual gaseous hydrocarbon rate in calculating source according to hydrocarbon thermal simulation experiment

It is according to the formula that hydrocarbon thermal simulation experiment calculates residual gas-oil ratio：

Wherein, ω is residual gas-oil ratio；q_gAnd q_oRespectively factor of created gase, oil productivity, mg HC/g TOC, according to hydrocarbon hot-die Draft experiment is obtained；WithThe respectively efflux coefficient of gaseous hydrocarbon and liquid hydrocarbon, %；

Set up residual gaseous hydrocarbon rate model (Pr in source_g)：

Pr_g=Pr_l′×ω；

Wherein, Pr_gIt is residual gaseous hydrocarbon rate in source, mg HC/g TOC；Pr_l′To be remained in hydrocarbon source rock including C₅₊Including Liquid hydrocarbon rate, mg HC/g TOC；ω is residual gas-oil ratio；

As shown in fig. 7, being to obtain Upper Paleozoic in Ordos Basin residual gas-oil ratio figure according to hydrocarbon thermal simulation experiment；Such as It is residual gaseous hydrocarbon rate figure in the Upper Paleozoic in Ordos Basin source obtained according to residual gas-oil ratio shown in Fig. 8.

Step 8：Residual gaseous hydrocarbon amount in source is obtained according to residual gaseous hydrocarbon rate in source

Set up residual gaseous hydrocarbon amount model (Q in source_rg)：

Wherein, Q_rgResidual gaseous hydrocarbon amount, × 10 in source¹²m³；Pr_gIt is residual gaseous hydrocarbon rate in source, mg HC/g TOC；H is Hydrocarbon source rock thickness, m；A is hydrocarbon source rock area, m²；ρ is hydrocarbon source rock density, g/cm³；TOC is total content of organic carbon, %；R_o5Make a living Reflectance of vitrinite at hydrocarbon thresholding, %；R_o′It is the reflectance of vitrinite under hydrocarbon thresholding, %；

It is 22.9 × 10 to be calculated residual gaseous hydrocarbon amount in Upper Paleozoic in Ordos Basin source¹²m³。

Step 9：Residual oil gas stock number is measured in source according to residual liquid hydrocarbon amount in source and residual gaseous hydrocarbon

According to following formula, calculate and oil gas stock number (Q is remained in source_r)：

Q_r=Q_rl×μ_l+Q_rg×μ_g；

Wherein, Q_rTo remain oil gas stock number, × 10 in source¹²m³；Q_rlAnd Q_rgResidual liquid hydrocarbon amount and source respectively in source Interior residual gaseous hydrocarbon amount, × 10¹²m³；μ_lAnd μ_gRespectively in source in residual liquid hydrocarbon and source residual gaseous hydrocarbon aggregation system Number, %；

The convergence factor value of oil gas will take into full account studies area's actual conditions, the degree of prospecting in research area, geological conditions, Routine and unconventionaloil pool property can all influence convergence factor value, the stock number result for obtaining also can more unified assignment have larger Deviation.

Step 10：Unconventionaloil pool money is obtained according to oil gas stock number is remained in compact reservoir petroleum resources amount outside source and source Measure in source

Q_uc=Q_t+Q_r；

Wherein, Q_ucIt is unconventional petroleum resources amount, × 10¹²m³；Q_tAnd Q_rOil gas money respectively outside source in compact reservoir Measure and oil gas stock number, × 10 are remained in source in source¹²m³；

Finally obtain, compact reservoir petroleum resources amount 8.6 × 10 outside source¹²m³；Remained in source oil gas stock number 29.2 × 10¹²m³；Sum of the two 37.8 × 10¹²m³, as unconventional petroleum resources amount.

Above example illustrates that the evaluation method of the petroleum resources amount of routine of the invention and unconventional reservoir is closer Underground actual conditions；Overcoming traditional resource evaluation method can only individually evaluate the problem of routine or unconventional petroleum resources, To carry out routine basic geology model is provided with unconventional resource assessment.

Claims (10)

1. the evaluation method of the petroleum resources amount of a kind of routine and unconventional reservoir, it is characterised in that the routine and unconventional storage The evaluation method of the petroleum resources amount of layer is comprised the following steps：

According to hydrocarbon primary rock producing hydrocarbon potential index, row's hydrocarbon rate of hydrocarbon source rock is obtained；

Row's hydrocarbon rate according to the hydrocarbon source rock, obtains hydrocarbon source rock row's hydrocarbon intensity；

Hydrocarbon intensity is arranged according to the hydrocarbon source rock, hydrocarbon source rock Hydrocarbon yield is obtained；

According to the hydrocarbon source rock Hydrocarbon yield, obtain the petroleum resources amount of conventional reservoir outside source, outside source compact reservoir petroleum resources Amount；

Lighter hydrocarbons compensation correction formula is set up, according to lighter hydrocarbons compensation correction formula, residual liquid hydrocarbon rate in acquisition source；

According to residual liquid hydrocarbon rate in the source, residual liquid hydrocarbon amount in source is obtained；

Obtain remaining gas-oil ratio, residual gaseous hydrocarbon rate in acquisition source by hydrocarbon thermal simulation experiment；

According to residual gaseous hydrocarbon rate in the source, residual gaseous hydrocarbon amount in source is obtained；

According to residual gaseous hydrocarbon amount in residual liquid hydrocarbon amount in the source and the source, obtain remaining oil gas stock number in source；

According to oil gas stock number is remained in compact reservoir petroleum resources amount outside the source and the source, unconventional petroleum resources is obtained Amount, completes the evaluation to routine and the petroleum resources amount of unconventional reservoir.

2. the evaluation method of the petroleum resources amount of routine according to claim 1 and unconventional reservoir, it is characterised in that root According to hydrocarbon primary rock producing hydrocarbon potential index, when obtaining row's hydrocarbon rate of hydrocarbon source rock, follow the steps below：

Set up hydrocarbon primary rock producing hydrocarbon potential index and maturity of organic matter index R_oHydrocarbon primary rock producing hydrocarbon potential index section；

According to hydrocarbon primary rock producing hydrocarbon potential index section, hydrocarbon source rock hydrocarbon expulsion is set up, obtain row's hydrocarbon rate of hydrocarbon source rock：

Pg_e=Pg_o-Pg_r；

Pg₀=k × Pg⁰；

$k=\frac{1-0.82\left({\mathrm{Pg}}_r\right)/1000}{1-0.83\left({\mathrm{Pg}}^0\right)/1000}$

Wherein, Pg_rIt is residual hydrocarbon generation potential index, mg HC/g TOC；

Pg⁰It is hydrocarbon primary rock producing hydrocarbon potential index, mg HC/g TOC at row's hydrocarbon thresholding；

Pg_oIt is the original hydrocarbon generation potential index of hydrocarbon source rock, mg HC/g TOC；

Pg_eIt is row's hydrocarbon rate of hydrocarbon source rock, mg HC/g TOC.

3. the evaluation method of the petroleum resources amount of routine according to claim 1 and unconventional reservoir, it is characterised in that root According to row's hydrocarbon rate of the hydrocarbon source rock, according to equation below, hydrocarbon source rock row's hydrocarbon intensity is obtained：

$I_{pe}={\∫}_{R_{o1}}^{R_{o^{\′}}}{10}^{-4}\×{\mathrm{Pg}}_e\×h\×\mathrm{\ρ}\×TOC\×{\mathrm{dR}}_o$

Wherein, I_peFor hydrocarbon source rock arranges hydrocarbon intensity, × 10⁸m³/km²；

Pg_eIt is row's hydrocarbon rate of hydrocarbon source rock, mg HC/g TOC；

H is hydrocarbon source rock thickness, m；

ρ is hydrocarbon source rock density, g/cm³；

TOC is total content of organic carbon, %；

R_oIt is reflectance of vitrinite, %；

R_o1It is corresponding reflectance of vitrinite, % at row's hydrocarbon thresholding；

R_oIt is actual reflectance of vitrinite, % under row's hydrocarbon thresholding.

4. the evaluation method of the petroleum resources amount of routine according to claim 1 and unconventional reservoir, it is characterised in that root Hydrocarbon intensity is arranged according to the hydrocarbon source rock, when obtaining hydrocarbon source rock Hydrocarbon yield, is followed the steps below：

The fine and close lower limit of porosity Ф=12% is determined according to reservoir densification history, the outer densification of the outer conventional reservoir in source and source is divided and is stored up Layer, correspondence is expelled to outside source the hydrocarbon amount in conventional reservoir on fine and close lower limit, and correspondence is expelled to outside source fine and close under fine and close lower limit Hydrocarbon amount in reservoir；

Foundation is expelled to outside source the hydrocarbon amount model Q in conventional reservoir_pec：

$Q_{pec}={\∫}_{R_{o1}}^{R_{o2}}{10}^{-4}\×{\mathrm{Pg}}_e\×h\×A\×\mathrm{\ρ}\×TOC\×{\mathrm{dR}}_o;$

Foundation is expelled to outside source the hydrocarbon amount model Q in compact reservoir_pet：

$Q_{pet}={\∫}_{R_{o3}}^{R_{o4}}{10}^{-4}\×{\mathrm{Pg}}_e\×h\×A\×\mathrm{\ρ}\×TOC\×{\mathrm{dR}}_o;$

Wherein, Q_pecTo be expelled to the Hydrocarbon yield of conventional reservoir outside source, × 10¹²m³；

Q_petTo be expelled to outside source the hydrocarbon amount in compact reservoir, × 10¹²m³；

Pg_eIt is row's hydrocarbon rate of hydrocarbon source rock, mg HC/g TOC；

H is hydrocarbon source rock thickness, m；

A is hydrocarbon source rock area, m²；

ρ is hydrocarbon source rock density, g/cm³；

TOC is total content of organic carbon, %；

R_oIt is reflectance of vitrinite, %；

R_o1It is corresponding reflectance of vitrinite, % at row's hydrocarbon thresholding；

R_o2It is the actual reflectance of vitrinite between row's hydrocarbon thresholding and fine and close lower limit, %；

R_o3It is corresponding reflectance of vitrinite, % at fine and close lower limit；

R_o4It is the actual reflectance of vitrinite under fine and close lower limit, %.

5. the evaluation method of the petroleum resources amount of routine according to claim 1 and unconventional reservoir, it is characterised in that root According to the hydrocarbon source rock Hydrocarbon yield, according to equation below, obtain the petroleum resources amount of conventional reservoir outside source, outside source compact reservoir oil Gas stock number：

Q_c=Q_pec×μ_c

Q_t=Q_pet×μ_t

Wherein, Q_cIt is the petroleum resources amount of conventional reservoir outside source, × 10¹²m³；

Q_tIt is the petroleum resources amount of compact reservoir outside source, × 10¹²m³；

Q_pecTo be expelled to outside source the hydrocarbon amount in conventional reservoir, × 10¹²m³；

Q_petTo be expelled to outside source the hydrocarbon amount in compact reservoir, × 10¹²m³；

μ_cIt is the convergence factor of conventional reservoir outside source, %；

μ_tIt is the convergence factor of compact reservoir outside source, %.

6. the evaluation method of the petroleum resources amount of routine according to claim 1 and unconventional reservoir, it is characterised in that institute Stating lighter hydrocarbons compensation correction formula is：

${\mathrm{Pr}}_{l^{\′}}=\frac{{\mathrm{Pr}}_l}{1-B_k}$

Wherein, B_k=0.81-0.65R_o+0.18R_o ²

Pr_1′To be remained in hydrocarbon source rock including C₅₊In interior liquid hydrocarbon rate, mg HC/g TOC；

Pr₁It is the residual liquid hydrocarbon rate surveyed in hydrocarbon source rock, refers generally to C₁₅₊Liquid hydrocarbon amount, mg HC/g TOC；

B_kIt is C in hydrocarbon source rock_5-14Component accounts for the liquid hydrocarbon total amount C of residual₅₊Percentage, %；

R_oIt is the reflectance of vitrinite of organic matrix in hydrocarbon source rock, %.

7. the evaluation method of the petroleum resources amount of routine according to claim 1 and unconventional reservoir, it is characterised in that root According to residual liquid hydrocarbon rate in the source, according to equation below, residual liquid hydrocarbon amount in source is obtained：

$Q_{rl}={\∫}_{R_{o5}}^{R_{o^{\′}}}{10}^{-4}\×{\mathrm{Pr}}_{l^{\′}}\×h\×A\×\mathrm{\ρ}\×TOC\×{\mathrm{dR}}_o$

Wherein, Q_r1Residual liquid hydrocarbon amount, × 10 in source¹²m³；

Pr_1′To be remained in hydrocarbon source rock including C₅₊In interior liquid hydrocarbon rate, mg HC/g TOC；

H is hydrocarbon source rock thickness, m；

A is hydrocarbon source rock area, m²；

ρ is hydrocarbon source rock density, g/cm³；

TOC is total content of organic carbon, %；

R_o5It is reflectance of vitrinite, % at hydrocarbon thresholding；

R_o′It is the reflectance of vitrinite under hydrocarbon thresholding, %.

8. the evaluation method of the petroleum resources amount of routine according to claim 1 and unconventional reservoir, it is characterised in that logical Hydrocarbon thermal simulation experiment is crossed, using below equation, residual gas-oil ratio is obtained：

Wherein, ω is residual gas-oil ratio；

q_gIt is factor of created gase, mg HC/g TOC；

q_oIt is oil productivity, mg HC/g TOC；

It is the efflux coefficient of gaseous hydrocarbon, %；

It is the efflux coefficient of liquid hydrocarbon, %；

Residual gaseous hydrocarbon rate in the source, obtains according to equation below：

Pr_g=Pr_1′×ω

Wherein, Pr_gIt is residual gaseous hydrocarbon rate in source, mg HC/g TOC；

Pr_1′To be remained in hydrocarbon source rock including C₅₊In interior liquid hydrocarbon rate, mg HC/g TOC；

ω is residual gas-oil ratio.

9. the evaluation method of the petroleum resources amount of routine according to claim 1 and unconventional reservoir, it is characterised in that root According to residual gaseous hydrocarbon rate in the source, according to equation below, residual gaseous hydrocarbon amount in source is obtained：

$Q_{rg}={\∫}_{R_{o5}}^{R_{o^{\′}}}{10}^{-4}\×{\mathrm{Pr}}_g\×h\×A\×\mathrm{\ρ}\×TOC\×{\mathrm{dR}}_o$

Wherein, Q_rgIt is residual gaseous hydrocarbon amount, × 10 in source¹²m³；

Pr_gIt is residual gaseous hydrocarbon rate in source, mg HC/g TOC；

H is hydrocarbon source rock thickness, m；

A is hydrocarbon source rock area, m²；

ρ is hydrocarbon source rock density, g/cm³；

TOC is total content of organic carbon, %；

R_o5It is reflectance of vitrinite, % at hydrocarbon thresholding；

R_o′It is the reflectance of vitrinite under hydrocarbon thresholding, %.

10. the evaluation method of the petroleum resources amount of routine according to claim 1 and unconventional reservoir, it is characterised in that According to residual gaseous hydrocarbon amount in residual liquid hydrocarbon amount in the source and the source, according to equation below, obtain remaining oil gas in source Stock number：

Q_r=Q_r1×μ₁+Q_rg×μ_g

Wherein, Q_rTo remain oil gas stock number, × 10 in source¹²m³；

Q_r1It is residual liquid hydrocarbon amount, × 10 in source¹²m³；

Q_rgIt is residual gaseous hydrocarbon amount, × 10 in source¹²m³；

μ₁It is the convergence factor of residual liquid hydrocarbon in source, %；

μ_gIt is the convergence factor of residual gaseous hydrocarbon in source, %.