CN104712301B - A kind of method for determining volcanic rock reservoir pressure break scale - Google Patents
A kind of method for determining volcanic rock reservoir pressure break scale Download PDFInfo
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- CN104712301B CN104712301B CN201510082998.9A CN201510082998A CN104712301B CN 104712301 B CN104712301 B CN 104712301B CN 201510082998 A CN201510082998 A CN 201510082998A CN 104712301 B CN104712301 B CN 104712301B
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- pressure break
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
Abstract
The invention discloses a kind of method for determining volcanic rock reservoir pressure break scale, comprise the following steps：Collect minimum principal stress curve, determine perforated interval, statistics plus sand intensity data and formation testing performance data, form plate, determine that reservoir adds sand intensity threshold.The present invention improves the efficiency of scene prediction pressure break scale, reduces the difficulty of volcanic reservoirs pressure break scale forecast, requires relatively low to technical staff, improve operating efficiency and economic benefit.
Description
Technical field
The present invention relates to volcanic rock pressure break scale to match field, and specifically, the present invention relates to one kind to determine volcanic rock storage
The method that scale is split in lamination.
Background technology
The determination of volcanic rock reservoir pressure break scale is the basis of volcanic rock reservoir transformation success.At present, volcanic rock reservoir
Pressure break scale is set mainly using the software prediction of the mathematical model method of complexity and each company as means.Complex mathematical model parameter
Complicated, calculating specialty, has higher threshold；And although software prediction is easy, software source code is that each company technique is secret
Close or Patents, it can not generally know its accurate Forecasting Methodology.Therefore, existing volcanic rock reservoir pressure break is simplified
Determination method, the raising operating efficiency of scale are extremely urgent.
Stratum of Volcanic Rocks is present because volcanic rock reservoir fragility is strong, and FRACTURE PREDICTION difficulty is big after itself fracture development, pressure break,
The problem of seam is high unmanageable, therefore, how to solve volcanic rock pressure break scale and add sand scale to turn into volcanic rock reservoir pressure break
Key, scene is more at present carries out complex mathematical computations and calculating with traditional sandstone forecast model, but past in actual fracturing process
Accurate Prediction and it can not calculate that post-fracturing actual seam is high and seam length toward because volcanic rock lacks experimental model in itself.
With the propulsion of petroleum exploration and development process, volcanic reservoirs exploitation in untraditional reservoir increasingly by
Pay attention to, volcanic reservoirs are influenceed by its reservoir particularity, do not possess natural production capacity typically.But volcanic reservoirs exist
If pressure break scale design is improper during fracturing reform, it can cause to be unable to reach capacity requirements or even destroy the effect of oil-gas reservoir
Fruit.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of method for determining volcanic rock reservoir pressure break scale, overcome
The defects of above-mentioned prior art is present, this method have good Regional suitability, in areal, summarize and sort out scene pressure
Rear effect is split, interval adds sand intensity and the advance by leaps and bounds relation of parameter and effect of stress is established and is adapted to the fire of areal using transforming
Mountain rock pressure splits proportioning plate.
Plate matching method of the present invention is a kind of intuitively pressure break matching method, using data point in plate type and
A kind of method that intuitively line of demarcation is matched.
The technical problems to be solved by the invention are achieved through the following technical solutions：
A kind of method for determining volcanic rock reservoir pressure break scale, comprises the following steps：
(1) original well data is obtained：
The minimum principal stress curve in present invention research area is to be calculated to try to achieve according to log data, specifically, the well logging
Data are to apply more extensive CSU logging programs, such as the CSU logging programs of Xinjiang Oilfield Company；Wherein participating in minimum master should
What power calculated is acoustic travel time logging curve and bulk density log, and its specific test environment, instrument and step refer to
Petrochina standard：QSY HB 0007-2001 3700, CSU well-log information acceptance specifications, the minimum principal stress that the present invention uses are bent
Line computation method can use Ma Jianhai in 2002 correlative theses《Reservoir stress is calculated with well-log information》In correlation technique.
(2) the individual well minimum horizontal principal stress curve in the goal in research area calculated according to the above method is collected or calculates, most
Minor principal stress curve refer under the conditions of individual well on the minimum principal stress longitudinal direction of stratum data line, actually one group and drilling well
The related stratum minimum principal stress data of depth, this patent are actually to count and counted using the data on this group longitudinal direction
Calculate and analyze；
(3) perforation refers to link up stratum and pit shaft, the process of produced fluid flow channel using high pressure perforation；Perforated interval
Refer to the specific depth segment of perforation；Try to achieve the minimum horizontal principal stress average value of perforated hole section respectively using statistic lawWith
The minimum principal stress on the stratum on (stratum in the range of upper and lower 50 meters adjacent with perforation on longitudinal direction) is maximum near perforated interval
Value PHmax, the core of this patent is exactly the calculating of " stress the advance by leaps and bounds parameter " parameter and introducing need it is minimum using the two data
Horizontal principal stress average valueMinimum principal stress maximum PHmax, it is specifically shown in formula below.Further " stress is advanced by leaps and bounds for utilization
Parameter " tries to achieve reservoir heterogeneity, and (reservoir heterogeneity refers to that the various properties of reservoir change with its locus
Attribute.It is mainly manifested in the heterogeneous of the heterogeneous and interstitial space of rock substance composition.Clastic reservoir rock due to deposition and into
The difference of rock epigenesis, its rock forming mineral composition, matrix content, cement content differ, have influence on pore shape and
The change of size and reservoir properties, form the anisotropism of interior reservoir layer, plane and interlayer).
" stress advance by leaps and bounds parameter " is the new parameter tried to achieve according to above-mentioned two minimum principal stress parameter, and it is specific to calculate
Method is as follows：
In formula (1)：Tp：Stress is advanced by leaps and bounds parameter；
PHmax：Effective reservoir section minimum horizontal principal stress maximum；
Perforated interval minimum horizontal principal stress average value.
(4) " stress advance by leaps and bounds parameter " on the neighbouring stratum of the perforated intervals of different fractured wells in region, while statistical regions are tried to achieve
Interior fractured well adds sand intensity data and formation testing performance data；
(5) stress has been calculated to advance by leaps and bounds parameter, plus sand intensity and formation testing performance data, has been that stress is dashed forward by data input abscissa
Enter parameter, ordinate is added in sand intensity plate, and scatterplot color can be divided into oil-gas Layer, oil-water common-layer, water layer according to formation testing achievement
And dried layer；And the colour codes such as oil-containing water layer, aqueous oil reservoir, gas-bearing bed, gassiness water layer can also be included, to distinguish different pieces of information
The formation testing achievement of point；
(6) according to the distributed areas of the point of different colours, by the difference of oil-gas Layer, oil-water common-layer, water layer and dried layer etc. point
Cloth region is separated using region line, and then is tried to achieve different stress and advanced by leaps and bounds under conditions of parameter plus sand intensity, and described plus sand is strong
Degree is ratio of the sand feeding amount with adding sand section thickness in fracturing process in reservoir fracturing technique, both every meter of sand feeding amount of fracturing section,
Guidance is provided for pressure break；
(7) the final boundary determined according to plate, optimal plus sand intensity as under given conditions, further according to reservoir pressure
The thickness split, you can it is determined that final fracturing sand feeding amount, i.e., be finally how to determine volcanic rock reservoir pressure break scale.
The basis of the design of volcanic rock pressure break scale of the present invention is the determination method of volcanic rock reservoir pressure break scale, mesh
Preceding almost all of volcanic reservoirs exploitation is both needed to be determined pressure break scale using pressure break scale determination method.Such as new
Boundary oil field, including in turn Carboniferous, the regional Permian System of gold dragon, accurate eastern Carboniferous volcanic rock can be in this way
Pressure break scale is predicted.
The present invention is had the advantages that using above-mentioned technical proposal：
One, the basis of the design of volcanic rock pressure break scale of the present invention is the determination side of volcanic rock reservoir pressure break scale
Method, at present almost all of volcanic reservoirs exploitation are both needed to be determined pressure break scale using pressure break scale determination method.
Such as in Xinjiang Oilfield, including in turn Carboniferous, the regional Permian System of gold dragon, accurate eastern Carboniferous volcanic rock can use this
Kind method is predicted to pressure break scale.
Two, by collecting minimum principal stress curve, determining perforated interval, statistics plus sand intensity data and formation testing achievement number
According to, formed plate, determine that reservoir adds sand intensity threshold：
(1) volcanic rock survey region pressure break data, oil test data and the Stress calculation using this method to certain Chinese oil field
Data carry out statistics subregion；
(2) the new well in scene is verified and applied using the plate for counting zone method foundation, the FRACTURING DESIGN time is reduced
60%；
(3) this method requires low to researcher's specialty, improves operating efficiency, reduces FRACTURING DESIGN expense.
Brief description of the drawings
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
Fig. 1 volcanic rock electrobed marks determine new method flow chart
Fig. 2 oil fields volcanic rock pressure break proportioning plate schematic diagram
Embodiment
Embodiment 1
Certain oil field volcanic rock reservoir pressure break proportioning determines new method example.
(1) certain oil field volcanic rock reservoir is chosen, collecting zone internal pressure is cleaved into the minimum horizontal principal stress curve of work(well, calculates
" stress advance by leaps and bounds parameter " of all wells in region, computation sheet is shown in Table 1：
Certain the oil field volcanic rock reservoir stress of table 1 is advanced by leaps and bounds parameter computation sheet
(2) field data of above reservoir fracturing is collected, calculates its meter of sand feeding amount, while formation testing achievement is counted in the lump
In form, specific computation sheet is shown in Table 2：
Certain the oil field volcanic rock pressure break data of table 2 and plus sand Strength co-mputation form
(3) in summary two forms, extract rice sand feeding amount, and stress is advanced by leaps and bounds parameter and formation testing conclusion 3, forms new table,
As shown in table 3, and using table 3 cross plot is done, wherein：Stress parameter of advancing by leaps and bounds is abscissa, and rice sand feeding amount is ordinate, formation testing knot
Forum point, as shown in Figure 2.
Certain the oil field volcanic rock proportioning plate of table 3 makes form
(4) pressure break scale can be set as to two using plate, when coefficient of advancing by leaps and bounds is more than 1.2, oil-gas Layer reservoir suggestion
The rice sand feeding amount of pressure break scale is in 2.25m3/ more than m；When coefficient of advancing by leaps and bounds is more than 1.2, oil-water common-layer reservoir suggests pressure break scale
Rice sand feeding amount in 1.59m3/ below m, when advancing by leaps and bounds coefficient below 1.2, it is proposed that pressure break scale rice sand feeding amount is in 1.59m3/m
Below.
(5) this new method is used, JingXX105Jing new to a bite in area carries out pressure break prediction, and the well reservoir is dashed forward with perforated interval
It is 1.3MPa to enter parameter, and fluid properties are judged to oil-gas Layer in advance, penetrates out 10 meters of thickness, and calculating rice sand feeding amount using chart method is
2.5m3/m.The preferable day oil-producing 12.3t of pressure break actual effect, actual shortening 1 week is designed and produced, save 200,000 yuan of design funds.
It should be appreciated that the above-mentioned embodiment of the present invention is used only for exemplary illustration or explains the present invention's
Principle, and it is not construed as limiting the present invention limitation.Therefore, that is done without departing from the spirit and scope of the present invention any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.In addition, appended claims of the present invention are intended to
Cover the whole fallen into scope and border or this scope and the equivalents on border to change and modifications
Example.
Claims (4)
1. a kind of method for determining volcanic rock reservoir pressure break scale, comprises the following steps：
(1) original well data is obtained：
(2) the individual well minimum horizontal principal stress curve of collection research target area；
(3) according to the individual well minimum horizontal principal stress curve of the target area of collection, target interval reservoir and perforated interval are chosen,
The minimum horizontal principal stress average value of perforated interval is tried to achieve respectivelyWith the minimum level master of the effective reservoir section outside perforated interval
Stress maximum PHmax, further utilize " stress advance by leaps and bounds parameter " to try to achieve reservoir heterogeneity, " stress advance by leaps and bounds parameter " is
The new parameter tried to achieve according to above-mentioned minimum principal stress, circular are as follows：
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<mi>T</mi>
<mi>p</mi>
</msub>
<mo>=</mo>
<msub>
<mi>P</mi>
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<mi>H</mi>
<mi>m</mi>
<mi>a</mi>
<mi>x</mi>
</mrow>
</msub>
<mo>-</mo>
<mover>
<msub>
<mi>P</mi>
<mi>H</mi>
</msub>
<mo>&OverBar;</mo>
</mover>
<mo>...</mo>
<mrow>
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<mn>1</mn>
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</mrow>
</mrow>
In formula (1)：Tp：Stress is advanced by leaps and bounds parameter；
PHmax：The minimum horizontal principal stress maximum of effective reservoir section；
The minimum horizontal principal stress average value of perforated interval；
(4) try to achieve the Reservoir Section " stress advance by leaps and bounds parameter " of different fractured wells in region, at the same in statistical regions fractured well plus sand
Intensity data and formation testing performance data；
(5) stress has been calculated to advance by leaps and bounds parameter, plus sand intensity and formation testing performance data, has been that stress is advanced by leaps and bounds ginseng by data input abscissa
Number, ordinate are added in sand intensity plate, and scatterplot color is divided into oil-gas Layer, oil-water common-layer, water layer and dried layer according to formation testing achievement
Colour code, to distinguish the formation testing achievement of different pieces of information point；
(6) then the point according to different colours distributed areas, by the different distributions of oil-gas Layer, oil-water common-layer, water layer and dried layer
Region is separated using region line, and then is tried to achieve different stress and advanced by leaps and bounds under conditions of parameter plus sand intensity, is provided and is referred to for pressure break
Lead；
(7) the final boundary determined according to plate, optimal plus sand intensity as under given conditions, further according to reservoir fracturing
Thickness, you can it is determined that final fracturing sand feeding amount, i.e., finally determine volcanic rock reservoir pressure break scale.
2. a kind of method for determining volcanic rock reservoir pressure break scale according to claim 1, the specific test wrapper of log data
Border, instrument and step refer to petrochina standard：QSY HB 0007-2001 3700, CSU well-log information acceptance specifications.
3. a kind of method for determining volcanic rock reservoir pressure break scale according to claim 1, log data is that application is wider
General CSU logging programs；Participate in that minimum principal stress calculates is acoustic travel time logging curve and bulk density log, specifically
Test environment, instrument and step refer to petrochina standard：QSY HB 0007-2001 3700, CSU well-log information acceptance specifications.
4. a kind of method of determination volcanic rock reservoir pressure break scale described in one of claim 1-3 is it is determined that volcanic rock reservoir pressure
Split the application in terms of scale.
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| CN106869896B (en) * | 2017-04-26 | 2018-05-08 | 西南石油大学 | A kind of Low permeable oil and gas reservoirs straight well volume fracturing reservoir reconstruction volume Forecasting Methodology |
| CN109184656A (en) * | 2018-09-05 | 2019-01-11 | 大庆油田有限责任公司 | One kind, which adopting no note type and isolates well point, taps the latent power and proposes efficacious prescriptions method |
| CN110173243B (en) * | 2019-07-09 | 2024-03-22 | 西南石油大学 | Igneous rock oil reservoir water injection/gas injection development effect evaluation device and igneous rock oil reservoir water injection/gas injection development effect evaluation method |
| CN113622901B (en) * | 2020-04-21 | 2024-03-26 | 中国石油天然气股份有限公司 | Shale oil reservoir quality analysis method, device, equipment and medium |
| CN112381259A (en) * | 2020-07-20 | 2021-02-19 | 中国石油天然气集团有限公司 | Dynamic capacity prediction calculation method for compact conglomerate reservoir |
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| CN103206206B (en) * | 2012-01-16 | 2016-08-03 | 中国石油化工股份有限公司 | For the method calculating ultradeep well formation fracture pressure |
| CN104314563B (en) * | 2014-10-21 | 2015-08-05 | 西安科技大学 | A kind of Quantitative Evaluation with Well Logging method of coalbed methane reservoir pressure break |
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