CN103926630A - Method of determining tectonic hydrocarbon destruction rate - Google Patents
Method of determining tectonic hydrocarbon destruction rate Download PDFInfo
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Abstract
The invention provides a method of determining a tectonic hydrocarbon destruction rate, and belongs to the technical field of oil and gas resource evaluation. The method comprises steps of recovering a paleo oil and gas water interface of an oil and gas reservoir according to QGF, GOI, and oil and gas display level, determining the tectonic hydrocarbon destruction rate of the known oil and gas reservoir according to the paleo oil and gas water interface and the prior oil and gas water interface, determining tectonic strength according to erosion thickness and regional cap rock thickness, building a tectonic hydrocarbon destruction rate calculation model according to the known tectonic hydrocarbon destruction rate and the tectonic strength, and evaluating the regional tectonic hydrocarbon destruction rate according to the built regional tectonic hydrocarbon destruction rate model. The method for determining the tectonic hydrocarbon destruction rate solves the difficult problem of tectonic hydrocarbon destruction amount in the oil and gas resource evaluation, and provides important technical supports for forecasting the remaining resource potential of oil and gas and guiding the current oil and gas exploration.
Description
Technical field
The present invention relates to oil and gas resource evaluation technical field, particularly a kind of evaluation method of Complicated superimposed basin structure destruction hydrocarbon amount.
Background technology
Chinese scholars is calculated hydrocarbon resources great majority and is multiplied by the poly-coefficient (convergence factor) of fortune by analogy method or by raw (row) oil and gas content of source rock of trying to achieve at present, obtain the poly-intrasystem hydrocarbon resources amount of fortune, these methods are too coarse, and the impact of not only value difficulty, and human factor is large; And China's petroliferous basin, particularly Superimposed Basins tectonism intensity is large, the waste in collecting process is large in fortune for oil gas, and changes with the difference of geologic condition, thereby cannot meet need of production with the poly-coefficient summary oil-gas accumulation of a general fortune or dissipation effect.In addition, simple analogy method in the situation that of complex geologic conditions also and be false.
For the problems referred to above, Pang Xiongqi professor has proposed material balance method for 2000 and has calculated hydrocarbon resources in the 53-57 page of " University of Petroleum's journal ", is mainly that the equilibrium relation according to the lost of oil gas and between assembling is calculated hydrocarbon resources.The lost approach of oil gas comprises: source rock is residual, and (absorption, hole are water-soluble and oily molten (gas), reservoir is detained (absorption, hole water-soluble and oily molten (gas) etc.), before regional cap rock forms losing, in migration process wandering (country rock absorption, compacting water loss by dissolution, diffusion etc.), tectonism destruction etc., the oil and gas content gathering together equals the poor of growing amount and various dissipation amounts.
But, because the method lacks geological theory and the guidance model that structure destruction hydrocarbon amount is calculated, especially for tectonic movement Complicated superimposed basin frequently, the hydrocarbon-bearing pool of early origin has suffered the destruction in later stage, destroyed hydrocarbon is huge, and therefore the method is never well applied at Superimposed Basins.
Summary of the invention
The present invention is directed to Complicated superimposed basin structure destruction hydrocarbon amount and calculate a difficult difficult problem, proposed a kind of method of definite tectonism destruction hydrocarbon rate, described method comprises following:
According to QGF, GOI, show of oil and gas rank, the ancient oil of hydrocarbon-bearing pool, gas-water interface are recovered;
Recover and oil, gas-water interface now according to ancient oil, gas-water interface, determine that the tectonism of known hydrocarbon-bearing pool is destroyed hydrocarbon rate, computing formula is:
Wherein, k is that tectonism is destroyed hydrocarbon rate; A is Forming Petroleum Traps area now, km
2; H is hydrocarbon-bearing pool oil, gas column height now, m; A is ancient Forming Petroleum Traps area, km
2; H is ancient oil, gas column height, m;
According to erosion sediment thickness, regional cap rock thickness, determine the tectonism intensity in region, computing formula is:
Wherein, i is tectonism intensity; △ Hc is erosion sediment thickness, m; Hc is regional cap rock thickness, m;
According to existing structure destruction hydrocarbon rate and tectonism intensity, to set up areal structure variation and destroy hydrocarbon rate computation model, this computation model is:
k=0.9485ln(i)-0.645
Wherein, k is that tectonism is destroyed hydrocarbon rate; I is tectonism intensity;
Destroy hydrocarbon rate model according to the areal structure variation of setting up, calculate tectonism and destroy hydrocarbon rate, described multiple places are uniformly distributed in described region.
Above-mentioned structure destruction hydrocarbon rate refers to the ratio of tectonism destroyed hydrocarbon and the front effectively migration of tectonism hydrocarbon amount, is the important parameter for quantitative examination tectonism and the loose relation of Accumulation of Hydrocarbon.
The invention has the beneficial effects as follows: a kind of method that definite structure destruction hydrocarbon rate is provided, utilize tectonism intensity, carry out the evaluation of structure destruction hydrocarbon rate, solve petroliferous basin, the difficult problem that particularly Complicated superimposed basin structure destruction hydrocarbon amount is calculated, provides a kind of feasible technical method for hydrocarbon resources calculates, and has reduced the risk of oil-gas exploration, the exploration direction that has indicated oil gas, has applicability widely.
Brief description of the drawings
Fig. 1 is that in tower, the ancient water-oil interface of 4 oil reservoirs recover sectional view;
Fig. 2 is the geologic model that tectonism of the invention process is destroyed hydrocarbon rate;
Fig. 3 is regional erosion sediment thickness and stratigraphic dip matching graph of a relation in tower;
Fig. 4 is regional erosion sediment thickness and turn-off matching graph of a relation in tower;
Fig. 5 is Carboniferous erosion sediment thickness figure in tower;
Fig. 6 is Carboniferous regional cap rock thickness chart in tower;
Fig. 7 is that tectonism of the invention process is destroyed hydrocarbon rate computation model;
Fig. 8 is that in tower, Carboniferous tectonism is destroyed hydrocarbon rate evaluation map;
Fig. 9 is that tectonism of the invention process is destroyed the method flow diagram that hydrocarbon rate is evaluated.
Embodiment
Below in conjunction with application example, embodiments of the invention are described in further detail.
Application example district is palaeohigh in western part of China Superimposed Basins Tarim Basin.In tower, palaeohigh is positioned at Central Tarim Basin, exploration area approximately 2.2 × 10
4km
2, be the huge palaeohigh of a Caledonian.Can be divided into from north orientation south: main base band in No. 10 structural belts and tower in No. I broken folding band, tower in tower.Up to now, more than 120 mouthfuls of finishing drilling prospect pits altogether, more than 50 mouthfuls of wells obtain commercial hydrocarbon flows, at present in the Carboniferous system, Silurian, the Ordovician system have been verified tower 4, the important hydrocarbon-bearing pools such as 82 in 62-tower in tower 16, in tower 45, in tower in 24-tower 26, in tower 83, in tower, three indicated reserves c2s 5 × 10
8t, hydrocarbon resources is abundant.But in tower, Region of Oil-gas becomes to hide complicated condition, after early stage Hydrocarbon Formation Reservoirs, due to strong tectonic movement, most of oil gas reservoir has experienced the adjustment transformation of many phases in later stage and has destroyed, and the tar sand that the current large area of Silurian distributes is exactly the best evidence wrecking after oil gas forms.Therefore,, if can the structure destruction hydrocarbon rate of these hydrocarbon-bearing pools be studied, its result has major and immediate significance to reducing oil-gas exploration risk, the Exploration Potential that indicates oil gas and direction in tower.
(1) the ancient oil of hydrocarbon-bearing pool, gas-water interface recover
The history of adjusting, transforming and destroy after hydrocarbon-bearing pool forms has been recorded in the transition of hydrocarbon-bearing pool oil, gas-water interface, has recorded the oil of geologic epoch, the position of gas-water interface.Recovering more advanced method and technology about ancient water-oil interface is at present mainly oil-bearing fluid inclusion graininess index (GOI) method and quantitative particle fluorescence (QGF) technology.GOI method is directly to measure under the microscope organic fluid inclusion abundance in reservoir rock to the definite of ancient water-oil interface, in the time that GOI index is greater than 0.1, is indicated as oil reservoir; Otherwise be water layer.And QGF technology to ancient water-oil interface really rule be mainly to carry out the abundance of the organic fluid inclusion in indirect determination reservoir rock by measuring Organic Inclusion hydrocarbon sends in rock fluorescence intensity, in the time that QGF index is greater than 4, be indicated as oil reservoir; Otherwise be water layer.Also can roughly differentiate ancient water-oil interface from the display level data of oil gas in addition, in the time that show of oil and gas rank is higher (as fluorescence grade is greater than 9, pitch etc.), show may to be ancient oil reservoir.Fig. 1 is the example of the ancient water-oil interface of comprehensive utilization GOI, QGF and show of oil and gas rank Information integration Pan Shi Well Tazhong 4 district.Result shows, Well Tazhong 4 district has unified ancient water-oil interface, for-2610m.
(2) determine the structure destruction hydrocarbon rate of known hydrocarbon-bearing pool
According to the Gu oil of known hydrocarbon-bearing pool, gas-water interface, interface and the following formula of oil, air water now, can determine the structure destruction hydrocarbon rate of known hydrocarbon-bearing pool.Computing formula is:
Wherein, k is that tectonism is destroyed hydrocarbon rate; A is Forming Petroleum Traps area now, km
2; H is hydrocarbon-bearing pool oil, gas column height now, m; A is ancient Forming Petroleum Traps area, km
2; H is ancient oil, gas column height, m;
Fig. 2 is the geologic model that tectonism is destroyed hydrocarbon rate.Table 1 is the structure destruction hydrocarbon rate of regional known hydrocarbon-bearing pool in definite tower.
Table 1
(3) determine the tectonism intensity in region
The Basic Geological form that affects tectonism has three kinds: folding, abtragung and the rifting on stratum.Tectonism intensity refers to the destructiveness that tectonism produces periphery ambient condition, and it can carry out integrating representation by fold inclination angle, stratum size, turn-off and erosion sediment thickness, and between this three, has obvious linear relationship, referring to Fig. 3～Fig. 4.Meanwhile, the thickness of cap rock can reflect the shielded degree of hydrocarbon-bearing pool, has affected indirectly the degree that tectonism is destroyed, and therefore, what the present invention adopted erosion sediment thickness and regional cap rock thickness recently represents tectonism intensity.Computing formula is:
Wherein, i is tectonism intensity; △ Hc is erosion sediment thickness, m; Hc is regional cap rock thickness, m;
Fig. 5 is Carboniferous erosion sediment thickness flat distribution map in tower; Fig. 6 is Carboniferous regional cap rock thickness chart in tower.
(4) determine that areal structure variation destroys hydrocarbon rate computation model
The matching of structure destruction hydrocarbon rate and tectonism intensity by known hydrocarbon-bearing pool, can set up areal structure variation and destroy the computation model of hydrocarbon rate.Fig. 7 is the structure destruction hydrocarbon rate of known hydrocarbon-bearing pool and the fitted figure of tectonism intensity, result shows, tectonism intensity and tectonism are destroyed hydrocarbon rate and are had good positive correlation, fitting coefficient is up to 0.9, and it is feasible that application tectonism intensity characterizes tectonism destruction hydrocarbon rate.This computation model is:
k=0.9485ln(i)-0.645
Wherein, k is that tectonism is destroyed hydrocarbon rate; I is tectonism intensity;
(5) tectonism of evaluation region is destroyed hydrocarbon rate
According to the computation model of the tectonism intensity in multiple places, region and tectonism destruction hydrocarbon rate, to calculate tectonism and destroy hydrocarbon rate, described multiple places are uniformly distributed in described region.Table 2 is the result of calculation that in tower, Carboniferous tectonism is destroyed hydrocarbon rate.First grid homogenization is carried out in area in tower, make the well location calculating be evenly distributed in area in whole tower, this chooses 49 mouthfuls of wells altogether, is evenly distributed in area in whole tower.The result of calculating shows, in tower, after Carboniferous Hydrocarbon Formation Reservoirs, tectonism effect is stronger, 50% block oil gas destroys hydrocarbon rate and reaches more than 0.5, structure destruction hydrocarbon rate is greater than 0.5 part and is mainly arranged in the east (as Well Tazhong 4 structure destruction hydrocarbon rate reaches 0.92) of tower, preservation condition is poor, relatively better (Fig. 8) of western preservation condition.Therefore, tower central and west regions are main directions of Carboniferous system major field from now on.
Table 2
Fig. 9 is that a kind of tectonism according to the present invention is destroyed the method flow diagram that hydrocarbon rate is evaluated.Comprise the following steps:, according to QGF, GOI, show of oil and gas rank, recover the ancient oil of hydrocarbon-bearing pool, gas-water interface (1); (2) according to ancient oil, gas-water interface and oil, gas-water interface now, determine and selected the tectonism of hydrocarbon-bearing pool to destroy hydrocarbon rate; (3), according to erosion sediment thickness, regional cap rock thickness, determine the tectonism intensity in region; (4), according to existing structure destruction hydrocarbon rate and tectonism intensity, set up areal structure variation and destroy hydrocarbon rate computation model; (5) according to the areal structure variation destruction hydrocarbon rate model of setting up and the tectonism intensity in multiple places, region, calculate tectonism and destroy hydrocarbon rate.
The embodiment of the present invention has proposed the computing method of tectonism destruction hydrocarbon rate first, and the innovative point of the method is embodied in: 1, adopt QGF, GOI, show of oil and gas circle to recover the ancient oil of hydrocarbon-bearing pool, gas-water interface; 2, adopt recently characterizing tectonism intensity 3, having set up areal structure variation and destroy the computation model of hydrocarbon rate of erosion sediment thickness and regional cap rock thickness.
The embodiment of the present invention has solved the difficult problem that In The Central Tarim Area structure destruction hydrocarbon amount is calculated, for calculating, this area's hydrocarbon resources provides a kind of feasible technical method, reduce the risk of oil-gas exploration, indicated the exploration direction of oil gas, there is applicability widely.
Above-described embodiment; object of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only the specific embodiment of the present invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (5)
1. definite tectonism is destroyed a method for hydrocarbon rate, comprises the following steps:
(1) gather QGF, GOI, show of oil and gas rank, erosion sediment thickness, regional cap rock thickness, now, ancient hydrocarbon-bearing pool area, now, ancient oil, gas column height data;
(2), according to QGF, GOI, show of oil and gas rank, the ancient oil of hydrocarbon-bearing pool, gas-water interface are recovered;
(3) according to ancient oil, gas-water interface and oil, gas-water interface now, determine that the tectonism of known hydrocarbon-bearing pool is destroyed hydrocarbon rate;
(4), according to erosion sediment thickness, regional cap rock thickness, determine the tectonism intensity in region;
(5), according to existing structure destruction hydrocarbon rate and tectonism intensity, set up areal structure variation and destroy hydrocarbon rate computation model;
(6) destroy hydrocarbon rate model according to areal structure variation, the tectonism in multiple places of zoning is destroyed hydrocarbon rate;
(7) △ Hc is erosion sediment thickness, and Hc is depth of cover, and OWC is water-oil interface, and POWC is ancient water-oil interface.
2. method according to claim 1, wherein, step (2) comprises the calculating that known hydrocarbon reservoir structure is destroyed to hydrocarbon rate, computing formula is:
Wherein, k is that tectonism is destroyed hydrocarbon rate; A is Forming Petroleum Traps area now, km
2; H is hydrocarbon-bearing pool oil, gas column height now, m; A is ancient Forming Petroleum Traps area, km
2; H is ancient oil, gas column height, m.
3. method according to claim 1, wherein, step (3) comprises the calculating to areal structure variation intensity, computing formula is:
Wherein, i is areal structure variation intensity; △ Hc is erosion sediment thickness, m; Hc is regional cap rock thickness, m.
4. method according to claim 1, wherein, step (4) comprises the foundation that tectonism is destroyed to hydrocarbon rate computation model, structure destruction hydrocarbon rate computation model is:
k=0.9485ln(i)-0.645
Wherein, k is that tectonism is destroyed hydrocarbon rate; I is tectonism intensity.
5. method according to claim 1, wherein, the described multiple places of step (5) are uniformly distributed in described region.
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Cited By (2)
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| CN106443769A (en) * | 2015-08-06 | 2017-02-22 | 中国石油化工股份有限公司 | Petroliferous basin petroleum resource evaluation method |
| CN110593861A (en) * | 2019-07-29 | 2019-12-20 | 中国石油天然气股份有限公司 | Quantitative characterization method for structural deformation strength |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106443769A (en) * | 2015-08-06 | 2017-02-22 | 中国石油化工股份有限公司 | Petroliferous basin petroleum resource evaluation method |
| CN110593861A (en) * | 2019-07-29 | 2019-12-20 | 中国石油天然气股份有限公司 | Quantitative characterization method for structural deformation strength |
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