CN105353101A - Natural gas reservoir formation process quantitative recovery method - Google Patents
Natural gas reservoir formation process quantitative recovery method Download PDFInfo
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- CN105353101A CN105353101A CN201510617026.5A CN201510617026A CN105353101A CN 105353101 A CN105353101 A CN 105353101A CN 201510617026 A CN201510617026 A CN 201510617026A CN 105353101 A CN105353101 A CN 105353101A
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Abstract
The present invention provides a natural gas reservoir formation process quantitative recovery method comprising the following steps: collecting a raw gas parent material sample and carrying out dynamics simulation experiments; extrapolating to geological conditions on the basis of experimental results for conversion of experimental scale to geological age, and establishing the quantitative corresponding relationship of the geological age and reservoir formation events; and constructing a natural gas reservoir formation event complex chart to achieve quantitative recovery of marine facies deep natural gas reservoir formation process. According to the method, the conversion of the experimental scale to the geological age is achieved by extrapolating to the geological conditions on the basis of the experimental results, the quantitative corresponding relationship of the geological age and natural gas generation characteristics, reservoir stratum diagenetic evolution, entrapment development, structural adjustment activities and other reservoir formation events can be established, the natural gas reservoir formation event complex chart is constructed, and the quantitative recovery of the marine facies deep natural gas reservoir formation process can be achieved.
Description
Technical field
The present invention relates to a kind of method of process of natural gas pool formation quantitative reconstruction, belong to the geology-geochemical techniques field in oil and gas exploration.
Background technology
Along with the development of oil and gas industry, the proportion of rock gas shared by energy structure is increasing.How to strengthen exploration dynamics, aim at exploration constituency, realizing breakthrough and the development of gas prospecting, is current important technology proposition.China's marine facies Deep Carbonate Rocks is the main battle ground of gas prospecting, disclose the generation of rock gas under buried geologic condition, fortune poly-, become to hide and the regularity of distribution, be realize the gas prospecting of marine facies Deep Carbonate Rocks to break through the key found, its core is the recovery of process of natural gas pool formation.The foundation of process of natural gas pool formation restoration methods, be directly connected to China's Superimposed Basins deep natural gas regularity of distribution understanding, Exploration Potential evaluation, exploration targets preferably, a series of exploratory decision such as risk well site deployment, there is important social economic value.
Process of natural gas pool formation is the coupling at earth history various geologic event in period, and the quantitative reconstruction of process of natural gas pool formation, be exactly the coupled relation under same Geological Scale (geochron) between quantitatively characterizing various accumulation event evolution process and reservoir forming factor.In the past for the recovery of process of natural gas pool formation, mainly carry out from positive and negative two thinkings: the method just drilled, serve as theme with structural evolution and depositional and burial history, the priority sequence of qualitative description accumulation event and matching relationship, on Geological Scale, lack quantitative description accurately; The method of inverting, main according to gas reservoir oilfield now, the anti-geologic process pushed away once, due to the multi-solution of geochemistry transformation, this anti-method pushed away seems coarse and inaccurate.
Along with the development of raw hydrocarbon simulating experiment technique and perfect, can realize in the generative process of testing quantitative description rock gas on yardstick (can see UngererP, PeletR, Extrapolationofoilandgasformationkineticsfromlaboratorye xperimentstosedimentarybasins [J] .Nature, 1987,327:52-54; Liu Jinzhong, Tang Yongchun, by one of kerogen hydrocarbon-generating dynamics method prediction methane-generated quantity example [J]. Science Bulletin, 1998,43 (11): 1987-1191; Xiong Yongqiang, Geng Ansong, Wang Yunpeng etc., kerogen hydrocarbon dynamics simulations research [J]. Chinese science D collects, 2001,31:315-320; TangY, PerryJK, JendenPD, etal, Mathematicalmodelingofstablecarbonisotoperatiosinnatural gases [J] .GeochimicaetCosmochimicaActa, 2000,64:2673-2687).So, how by extrapolate laboratory findings under geologic condition, how to be extrapolated to Geological Scale quantitative description rock gas generating feature (change such as component, carbon isotope) and the matching relationship with other reservoir forming factor (reservoir diagenetic, trap growth, tectonic activity adjustment etc.) thereof from experiment yardstick, to have become the technological breakthrough point of process of natural gas pool formation quantitative reconstruction and technical barrier urgently to be resolved hurrily.
Summary of the invention
Fundamental purpose of the present invention is a kind of method providing process of natural gas pool formation quantitative reconstruction, and described method quantitatively can achieve the recovery of marine facies deep natural gas Filling process.
The invention provides a kind of method of process of natural gas pool formation quantitative reconstruction, it comprises the steps:
(1), gather angry matrix sample and carry out angry dynamics simulations;
(2), based on extrapolate laboratory findings to geologic condition, realize experiment yardstick to geochronic conversion, set up the quantitative corresponding relation of geochron and accumulation event;
(3), build natural gas accumulation event synthesizing map, realize the quantitative reconstruction of marine facies deep natural gas Filling process.
According to specific embodiment of the invention scheme, in the described method, step (1) comprising:
(1-1), hydrocarbon source rock or crude oil natural gas carrier quality sample is gathered;
(1-2), carry out raw hydrocarbon simulated experiment and product test analysis, obtain gas yield change curve.
Carry out raw hydrocarbon simulated experiment and product test analysis, obtain gas yield change curve and can utilize prior art, such as UngererP mentioned above, PeletR, Extrapolationofoilandgasformationkineticsfromlaboratorye xperimentstosedimentarybasins [J] .Nature, 1987,327:52-54; Liu Jinzhong, Tang Yongchun, by one of kerogen hydrocarbon-generating dynamics method prediction methane-generated quantity example [J]. Science Bulletin, 1998,43 (11): 1987-1191; Xiong Yongqiang, Geng Ansong, Wang Yunpeng etc., kerogen hydrocarbon dynamics simulations research [J]. Chinese science D collects, 2001,31:315-320; TangY, PerryJK, JendenPD, etal, Mathematicalmodelingofstablecarbonisotoperatiosinnatural gases [J] .GeochimicaetCosmochimicaActa, 2000,64:2673-2687.
According to specific embodiment of the invention scheme, in the described method, step (2) comprising:
(2-1), the experimental data arranged in step (1) medium power simulated experiment, set up experimental temperature-Auditory steady-state responses, experimental period-Auditory steady-state responses relation curve;
Preferably, the experimental temperature-Auditory steady-state responses described in step (2-1) mainly comprises: experimental temperature-methane (C
1) productive rate, experimental temperature-ethane (C
2) productive rate, experimental temperature-propane (C
3) productive rate, experimental temperature-C
1-5total hydrocarbon gas productive rate;
Described experimental period-Auditory steady-state responses mainly comprises: experimental period-methane (C
1) productive rate, experimental period-ethane (C
2) productive rate, experimental period-propane (C
3) productive rate, experimental period-C
1-5total hydrocarbon gas productive rate; Wherein C
1-5total hydrocarbon gas meter shows that carbon number is the hydrocarbon gas of 1 to 5;
(2-2) energy of activation (E) and the pre-exponential factor (A) of rock gas generation, is calculated;
Preferably, energy of activation (E) that rock gas generates is calculated and pre-exponential factor (A) can according to chemical kinetic reaction expression formula (1), (2) and (3):
X(t)＝∑X
i(t)(1)
X
i(t)＝X
i0[1-exp(-k
i(t)](2)
K
ifor rate constant, according to Arrhenius formula:
k
i＝A
iexp(-E
i/RT)(3)
In formula: oil-gas generation amount total when X is time t; X
ibe the growing amount of i-th reaction when time t; X
i0it is the maximum potential that i-th raw hydrocarbon parent can generate; For k
ifor reaction rate constant; I is the time; E
ifor energy of activation; A
ifor pre-exponential factor; R is gas law constant; T is thermodynamic temperature;
(2-3), according to study area depositional and burial history, obtain geochron-zone of interest buried depth data;
(2-4), according to ground temperature gradient data, calculate geochron-geology temperature " data, i.e. geology intensification sequence; Preferably, described underground temperature gradient computing formula is:
(2-5), based on time-temperature compensation principle, calculate geochron-Auditory steady-state responses, geology temperature-Auditory steady-state responses data, the raw hydrocarbon feature at arbitrary Geologic Time organic matter can be calculated, realize the extrapolation of experimental result to Geological Scale;
Wherein, the unit of described experimental temperature and described geology temperature is DEG C; The unit of described experimental period is h; Described geochronic unit is Ma; The unit of described zone of interest buried depth is m.
Preferably, the geology temperature-Auditory steady-state responses described in step (2-5) mainly comprises: geology temperature-methane (C
1) productive rate, geology temperature-ethane (C
2) productive rate, geology temperature-propane (C
3) productive rate, geology temperature-C
1-5total hydrocarbon gas productive rate;
Described geochron-Auditory steady-state responses comprise geochron-methane (C
1) productive rate, geochron-ethane (C
2) productive rate, geochron-propane (C
3) productive rate, geochron-C
1-5total hydrocarbon gas productive rate; Wherein C
1-5total hydrocarbon gas meter shows that carbon number is the hydrocarbon gas of 1 to 5.
According to specific embodiment of the invention scheme, in the described method, step (3) comprising:
(3-1), according to study area geologic background data, geologic event and geochronic corresponding relation is obtained;
(3-2), by Auditory steady-state responses data, geologic event and geochronic corresponding relation, set up accumulation event synthesizing map, be embodied as Tibetan Procedure recovery.
According to specific embodiment of the invention scheme, in the described method, described geologic event mainly comprises rock gas generating feature, reservoir diagenetic develops, trap is grown, structure adjustment activity.
According to specific embodiment of the invention scheme, described method comprises the steps:
1. hydrocarbon source rock or crude oil natural gas carrier quality sample is gathered;
2. carry out raw hydrocarbon simulated experiment and product test analysis, obtain gas yield change curve;
3. arrange the experimental data in dynamics simulations, set up experimental temperature-Auditory steady-state responses, experimental period-Auditory steady-state responses relation curve;
4. energy of activation (E) and the pre-exponential factor (A) of rock gas generation is calculated;
5. according to study area depositional and burial history, geochron (Ma)-zone of interest buried depth (m) is obtained " data;
6. according to ground temperature gradient data, " geochron (Ma)-geology temperature (DEG C) " data, i.e. geology intensification sequence is calculated;
7. based on time-temperature compensation principle, calculate geochron-Auditory steady-state responses, geology temperature-Auditory steady-state responses data, the raw hydrocarbon feature at organic matter in arbitrary geochron can be calculated, realize experimental result to geochronic extrapolation;
8. according to study area geologic background data, geologic event and geochronic corresponding relation is obtained;
9. by Auditory steady-state responses data, geologic event and geochronic corresponding relation, set up accumulation event synthesizing map, be embodied as Tibetan Procedure recovery;
Wherein, described geologic event comprises rock gas generating feature, reservoir diagenetic develops, trap is grown, structure adjustment activity.
Beneficial effect of the present invention: the present invention is based on extrapolate laboratory findings to geologic condition, realize the conversion of experiment yardstick to Geological Scale (geochron), set up geochron and rock gas generating feature, reservoir diagenetic develop, trap is grown, construct the quantitative corresponding relation of the accumulation event such as adjustment activity, build natural gas accumulation event synthesizing map, realize the quantitative reconstruction of marine facies deep natural gas Filling process.
Accompanying drawing explanation
Fig. 1 is the basic flow sheet of the method for process of natural gas pool formation quantitative reconstruction;
Fig. 2 is experimental temperature-Auditory steady-state responses relation curve;
Fig. 3 is that productive rate, conversion ratio are with geology temperature and geochronic change curve;
Fig. 4 is the natural gas accumulation time synthesizing map in the method for process of natural gas pool formation quantitative reconstruction.
Embodiment
In order to there be understanding clearly to technical characteristic of the present invention, object and beneficial effect, now in conjunction with instantiation, following detailed description is carried out to technical scheme of the present invention, these examples should be understood and be only not used in for illustration of the present invention and limit the scope of the invention.
Embodiment 1
The basic flow sheet of the method for the present embodiment process of natural gas pool formation quantitative reconstruction is as shown in Figure 1:
1. hydrocarbon source rock or crude oil natural gas carrier quality sample is gathered;
2. utilize prior art to carry out raw hydrocarbon simulated experiment and product test analysis, obtain gas yield change curve;
3. arrange experimental data, set up " experimental temperature-Auditory steady-state responses ", " experimental period-Auditory steady-state responses " relation curve;
4. according to chemical kinetic reaction expression formula, energy of activation (E) and the pre-exponential factor (A) of rock gas generation is calculated;
5. according to study area depositional and burial history, " geochron (Ma)-zone of interest buried depth (m) " data are obtained;
6. according to ground temperature gradient data, " geochron (Ma)-geology temperature (DEG C) " data, i.e. geology intensification sequence is calculated;
7. based on time-temperature compensation principle, sequence that geology is heated up and energy of activation, pre-exponential factor data, substitute into chemical kinetic reaction formula, calculate " geochron-Auditory steady-state responses ", " geology temperature-Auditory steady-state responses " data, realize the extrapolation of experimental result to Geological Scale;
8. according to study area geologic background data, obtain geologic event (tectonic movement, storage lid combination and pore evolution, hydrocarbon-bearing pool develop) with geochronic corresponding relation;
9. by Auditory steady-state responses data, geologic event and geochronic corresponding relation, set up accumulation event synthesizing map, be embodied as Tibetan Procedure recovery;
Revert to example with a Foregone pool cracking type process of natural gas pool formation, it comprises the steps:
The first step: the crude oil sample gathering a marine oil reservoir now, replaces Foregone pool crude oil, carries out the experiment of cracking anger.Crude oil sample group composition is: stable hydrocarbon 47.3%, aromatic hydrocarbons 26.4%, nonhydrocarbon 13%, bituminous matter 5.9%, and full virtue is than 1.79.
Second step: utilize prior art, carry out the angry simulated experiment of oil-breaking, and obtain gas yield change curve and experimental temperature-Auditory steady-state responses relation curve, acquired results as shown in Figure 2.Consider that the cracking of Foregone pool crude oil occurs in the system of a relative closure under geologic condition, therefore simulated experiment adopts and closes the high-pressure kettle system of gold pipe (prior art refers to UngererP mentioned above, PeletR, Extrapolationofoilandgasformationkineticsfromlaboratorye xperimentstosedimentarybasins [J] .Nature, 1987,327:52-54; Liu Jinzhong, Tang Yongchun, by one of kerogen hydrocarbon-generating dynamics method prediction methane-generated quantity example [J]. Science Bulletin, 1998,43 (11): 1987-1191; Xiong Yongqiang, Geng Ansong, Wang Yunpeng etc., kerogen hydrocarbon dynamics simulations research [J]. Chinese science D collects, 2001,31:315-320; TangY, PerryJK, JendenPD, etal, Mathematicalmodelingofstablecarbonisotoperatiosinnatural gases [J] .GeochimicaetCosmochimicaActa, 2000,64:2673-2687).
3rd step: according to chemical kinetic reaction formula, calculates energy of activation (E) and the pre-exponential factor (A) of rock gas generation.The kinetic parameter calculating crude oil pyrolysis generation gaseous hydrocarbon (each component and total gas) is as shown in table 1: Activated factor Ⅶ scope narrows along with the increase of gaseous hydrocarbon carbon number, and main activation energy then roughly shows as C
1>C
2>C
3>C
4-5, wherein C
1the highest, C
2a little less than C
1, and C
3and C
4-5lower, reflect the complexity that crude oil pyrolysis generates different carbon number gaseous hydrocarbon.
Table 1 crude oil pyrolysis generates the kinetic parameter of gaseous hydrocarbon
4th step: according to study area depositional and burial history, obtain " geochron-zone of interest buried depth " data, calculate " geochron-geology temperature " data, i.e. geology intensification sequence, acquired results is as shown in table 2:
The geology intensification data that table 2 dynamics calculation adopts
| Ma | 220 | 202 | 190 | 180 | 155 | 135 | 127 | 75 | 58 | 49 | 20 | 0 |
| ℃ | 20 | 60 | 85 | 80 | 95 | 165 | 149 | 228 | 220 | 172 | 140 | 130 |
5th step: based on time-temperature compensation principle, sequence that geology is heated up and energy of activation, pre-exponential factor data, substitute into chemical kinetic reaction formula, calculate " geochron-Auditory steady-state responses ", " geology temperature-Auditory steady-state responses " data, set up the change curve of gas Auditory steady-state responses change with geochron, geology temperature of Foregone pool cracking generation, acquired results as shown in Figure 3, realizes the extrapolation of experimental result to Geological Scale.
6th step: according to study area geologic background data, obtain geologic event (tectonic movement, storage lid combination and pore evolution, hydrocarbon-bearing pool develop) with geochronic corresponding relation; Meanwhile, by above-mentioned Auditory steady-state responses data, geologic event and geochronic corresponding relation, set up accumulation event synthesizing map, acquired results as shown in Figure 4, is embodied as Tibetan Procedure recovery.
Claims (8)
1. a method for process of natural gas pool formation quantitative reconstruction, it comprises the steps:
(1), gather angry matrix sample and carry out angry dynamics simulations;
(2), based on extrapolate laboratory findings to geologic condition, realize experiment yardstick to geochronic conversion, set up the quantitative corresponding relation of geochron and accumulation event;
(3), build natural gas accumulation event synthesizing map, realize the quantitative reconstruction of marine facies deep natural gas Filling process.
2. method according to claim 1, wherein, step (1) comprising:
(1-1), hydrocarbon source rock or crude oil natural gas carrier quality sample is gathered;
(1-2), carry out raw hydrocarbon simulated experiment and product test analysis, obtain gas yield change curve.
3. method according to claim 1, wherein, step (2) comprising:
(2-1), the experimental data arranged in step (1) medium power simulated experiment, set up experimental temperature-Auditory steady-state responses, experimental period-Auditory steady-state responses relation curve;
(2-2) energy of activation and the pre-exponential factor of rock gas generation, is calculated;
(2-3), according to study area depositional and burial history, obtain geochron-zone of interest buried depth data;
(2-4), according to ground temperature gradient data, calculate geochron-geology temperature data, i.e. geology intensification sequence;
(2-5), based on time-temperature compensation principle, calculate geochron-Auditory steady-state responses, geology temperature-Auditory steady-state responses data, the raw hydrocarbon feature at organic matter in arbitrary geochron can be calculated, realize experimental result to geochronic extrapolation;
Wherein, the unit of described experimental temperature and described geology temperature is DEG C; The unit of described experimental period is h; Described geochronic unit is Ma; The unit of described zone of interest buried depth is m.
4. method according to claim 3, wherein, the experimental temperature-Auditory steady-state responses described in step (2-1) comprises experimental temperature-methane production, experimental temperature-ethane yields, experimental temperature-propane yield, experimental temperature-C
1-5total hydrocarbon gas productive rate;
Described experimental period-Auditory steady-state responses comprises experimental period-methane production, experimental period-ethane yields, experimental period-propane yield, experimental period-C
1-5total hydrocarbon gas productive rate; Wherein C
1-5total hydrocarbon gas meter shows that carbon number is the hydrocarbon gas of 1 to 5.
5. method according to claim 3, wherein, the geology temperature-Auditory steady-state responses described in step (2-5) comprises geology temperature-methane production, geology temperature-ethane yields, geology temperature-propane yield, geology temperature-C
1-5total hydrocarbon gas productive rate;
Described geochron-Auditory steady-state responses comprise geochron-methane production; Geochron-ethane yields; Geochron-propane yield; Geochron-C
1-5total hydrocarbon gas productive rate; Wherein C
1-5total hydrocarbon gas meter shows that carbon number is the hydrocarbon gas of 1 to 5.
6. method according to claim 4, wherein, step (3) comprising:
(3-1), according to study area geologic background data, geologic event and geochronic corresponding relation is obtained;
(3-2), by Auditory steady-state responses data, geologic event and geochronic corresponding relation, set up accumulation event synthesizing map, be embodied as Tibetan Procedure recovery.
7. method according to claim 6, wherein said geologic event comprises rock gas generating feature, reservoir diagenetic develops, trap is grown, structure adjustment activity.
8. method according to claim 1, it comprises the steps:
1. hydrocarbon source rock or crude oil natural gas carrier quality sample is gathered;
2. carry out raw hydrocarbon simulated experiment and product test analysis, obtain gas yield change curve;
3. arrange the experimental data in dynamics simulations, set up experimental temperature-Auditory steady-state responses, experimental period-Auditory steady-state responses relation curve;
4. energy of activation and the pre-exponential factor of rock gas generation is calculated;
5. according to study area depositional and burial history, obtain geochron-zone of interest buried depth data;
6. according to ground temperature gradient data, calculate geochron-geology temperature data, i.e. geology intensification sequence;
7. based on time-temperature compensation principle, calculate geochron-Auditory steady-state responses, geology temperature-Auditory steady-state responses data, the raw hydrocarbon feature at organic matter in arbitrary geochron can be calculated, realize experimental result to geochronic extrapolation;
8. according to study area geologic background data, geologic event and geochronic corresponding relation is obtained;
9. by Auditory steady-state responses data, geologic event and geochronic corresponding relation, set up accumulation event synthesizing map, be embodied as Tibetan Procedure recovery;
Wherein, the unit of described experimental temperature and described geology temperature is DEG C; The unit of described experimental period is h; Described geochronic unit is Ma; The unit of described zone of interest buried depth is m;
Described geologic event comprises rock gas generating feature, reservoir diagenetic develops, trap is grown, structure adjustment activity.
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| CN111060672B (en) * | 2019-12-30 | 2022-02-22 | 中国海洋石油集团有限公司 | Method for reproducing whole history process of forming high-temperature overpressure natural gas reservoir |
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