CN104343442B - The effective permeability that hyposmosis and compact oil reservoir are independent of radial flow determines method - Google Patents
The effective permeability that hyposmosis and compact oil reservoir are independent of radial flow determines method Download PDFInfo
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- CN104343442B CN104343442B CN201310310869.1A CN201310310869A CN104343442B CN 104343442 B CN104343442 B CN 104343442B CN 201310310869 A CN201310310869 A CN 201310310869A CN 104343442 B CN104343442 B CN 104343442B
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- 230000035699 permeability Effects 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 37
- 238000012360 testing method Methods 0.000 claims abstract description 28
- 239000003129 oil well Substances 0.000 claims abstract description 11
- 239000012530 fluid Substances 0.000 claims abstract description 8
- 238000004458 analytical method Methods 0.000 claims abstract description 6
- 230000000704 physical effect Effects 0.000 claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000011435 rock Substances 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000001737 promoting effect Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 210000002569 neuron Anatomy 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The present invention provides the effective permeability that a kind of hyposmosis and compact oil reservoir are independent of radial flow to determine method, and the method includes determining multiple formation physical property and fluid parameter according to result of log interpretation, completion geologic report, high pressure property analysis report；Determine system compressibility；According to oil well production form and the extensive well testing test data of pressure, determine that tired product, pressure recover pressure reduction；According to flow-after-flow test test data, draw the relation straight line of yield and bottom hole pressure difference, determine intercept, the slope of this straight line；Determine hyposmosis and compact oil reservoir oil well drainage front；And determine hyposmosis and compact oil reservoir formation effective permeability.The method increase hyposmosis and the utilization rate of compact oil reservoir well test data and the accuracy of formation effective permeability determination, be hyposmosis and the compact oil reservoir exploitation accurate formation parameter of offer, and then produce huge economic benefit, there is certain promotional value.
Description
Technical field
The present invention relates to oil reservoir development technical field, especially relate to a kind of hyposmosis and compact oil reservoir is independent of radially
The formation effective permeability of stream feature determines method.
Background technology
Hyposmosis and compact oil reservoir are relatively low due to permeability, and usual well testing test is difficult to obtain the money with radial flow feature
Material, therefore can not accurately calculate formation effective permeability by the well test analysis technology based on radial flow characteristic theory.And for
Some can process method radial flow well test data, special due to not considering hyposmosis and compact oil reservoir fluid neuron network
Levy, thus be not suitable for hyposmosis and the determination of compact oil reservoir formation effective permeability.We have invented a kind of new low for this
Infiltration and compact oil reservoir are independent of the formation effective permeability of radial flow feature and determine method, solve above technical problem.
Content of the invention
It is an object of the invention to provide a kind of hyposmosis and compact oil reservoir are independent of the effective permeability determination side of radial flow
Method, improves hyposmosis and the utilization rate of compact oil reservoir well test data and the accuracy of formation effective permeability determination.
The purpose of the present invention can be achieved by the following technical measures：Hyposmosis and compact oil reservoir are independent of radial flow feature
Formation effective permeability determine method, the formation effective permeability that this hyposmosis and compact oil reservoir are independent of radial flow feature is true
The method of determining includes：Step 1, determines multiple stratum thing according to result of log interpretation, completion geologic report, high pressure property analysis report
Property and fluid parameter；Step 2, determines system compressibility；Step 3, according to oil well production form and the extensive well testing test data of pressure,
Determine that tired product, pressure recover pressure reduction；Step 4, according to flow-after-flow test test data, draws yield straight with the relation of bottom hole pressure difference
Line, determines intercept, the slope of this straight line；Step 5, the parameter being obtained according to step 1-4, determine hyposmosis and compact oil reservoir oil well
Drainage front；And step 6, the parameter being obtained according to step 1-5, determine hyposmosis and compact oil reservoir formation effective permeability.
The purpose of the present invention also can be achieved by the following technical measures：
The plurality of formation physical property and fluid parameter include porosity Φ, Effective thickness of formation h, water saturation Sw, oil-containing
Saturation So, well radius rw, oil volume coefficient Bo, formation oil viscosity, muo, formation oil coefficient of compressibility Co, stratum water coefficient of compressibility Cw.
In step 2, determine system compressibility CtRelational expression be：
Ct=CoSo+CwSw+Cf,
Cf=（2.587×10-4）/Φ0.4358；
In steps of 5, hyposmosis and compact oil reservoir oil well drainage front r are determinedePhysical relationship formula be：Wherein, a is the intercept of this yield and the straight line of bottom hole pressure difference, qcProduce for tired, Δ pwsFor pressure
Power recovers pressure reduction.
In step 6, the physical relationship formula determining hyposmosis and compact oil reservoir formation effective permeability k is：Wherein, b is the slope of this yield and the straight line of bottom hole pressure difference.
The formation effective permeability that hyposmosis in the present invention and compact oil reservoir are independent of radial flow feature determines method, meter
Calculate result and can be applicable to hyposmosis and the establishment of compact oil reservoir evaluation and development plan.It is independent of using hyposmosis and compact oil reservoir
The formation effective permeability of radial flow feature determines method, improves utilization rate and the ground of hyposmosis and compact oil reservoir well test data
The accuracy that layer effective permeability determines, is hyposmosis and compact oil reservoir exploitation provides accurate formation parameter, and then produces huge
Big economic benefit, has certain promotional value.
Brief description
Fig. 1 is the hyposmosis of the present invention and compact oil reservoir is independent of the formation effective permeability of radial flow feature and determines method
A specific embodiment flow chart；
Fig. 2 is yield and bottom hole pressure difference in a specific embodiment of the present invention（Q～Δ p）Straight line schematic diagram.
Specific embodiment
Above and other objects, features and advantages for enabling the present invention become apparent, and cited below particularly go out preferably to implement
Example, and coordinate institute's accompanying drawings, it is described in detail below.
As shown in figure 1, Fig. 1 is the hyposmosis of the present invention and compact oil reservoir is independent of the stratum of radial flow feature and effectively permeates
The flow chart that rate determines method.
In step 101, multiple stratum are determined according to result of log interpretation, completion geologic report, high pressure property analysis report
Physical property and fluid parameter, in one embodiment, the plurality of formation physical property and fluid parameter include porosity Φ, Effective thickness of formation
H, water saturation Sw, oil saturation So, well radius rw, oil volume coefficient Bo, formation oil viscosity, muo, formation oil coefficient of compressibility
Co, stratum water coefficient of compressibility Cw.Flow process enters into step 102.
In step 102, determine system compressibility.In one embodiment, calculate system compressibility CtRelational expression be：
Ct=CoSo+CwSw+Cf,
Cf=（2.587×10-4）/Φ0.4358；
Flow process enters into step 103.
In step 103, according to oil wells in low-permeability reservoirs production report and the extensive well testing test data of pressure, determine tired product qc, pressure
Power recovers pressure differential deltap pws.Flow process enters into step 104.
In step 104, according to flow-after-flow test test data, draw yield and bottom hole pressure difference（Q～Δ p）Relation straight line,
Determine intercept a, the slope b of this straight line.Flow process enters into step 105.
In step 105, determine hyposmosis and compact oil reservoir oil well drainage front re, physical relationship formula is：Flow process enters into step 106.
In step 106, determine hyposmosis and compact oil reservoir formation effective permeability, physical relationship formula is：Flow process terminates.
In a specific embodiment of the present invention, according to result of log interpretation, determine effecive porosity Φ=0.2160, ground
Layer effective thickness h=4.6m, water saturation Sw=0.38397, oil saturation S0=0.61603,；True according to completion geologic report
Determine well radius rw=0.06985m；Reported according to high pressure property fluid analysis and determine that oil volume coefficient is Bo=1.324m3/m3, stratum
Oil viscosity μo=0.88mpa.s, formation oil coefficient of compressibility Co=1.27×10-3MPa-1, stratum water coefficient of compressibility Cw=4.5×10- 4MPa-1.
Calculate system compressibility Ct=14.60×10-4MPa-1；
Determine that this well tires out according to production report and produce qc=300.4m3, determine that pressure recovers pressure reduction p according to pressure buildup testws
=10.0114MPa；
By flow-after-flow test test data（It is shown in Table 1）, draw the relation straight line of q～p, see Fig. 2, obtaining this Linear intercept is a=
2.862nd, slope is b=0.655；
Table 1 flow-after-flow test test data table
According to parameter determined above, calculate oil wells in low-permeability reservoirs drainage front re：
According to parameter determined above, calculate hyposmosis and compact oil reservoir formation effective permeability value k：
Above-described embodiment is to illustrate the invention and not to limit the present invention.
Claims (3)
1. hyposmosis and compact oil reservoir be independent of radial flow effective permeability determine method it is characterised in that this hyposmosis and
The formation effective permeability that compact oil reservoir is independent of radial flow feature determines that method includes：
Step 1, determines multiple formation physical property and stream according to result of log interpretation, completion geologic report, high pressure property analysis report
Body parameter；
Step 2, determines system compressibility；
Step 3, according to oil well production form and the extensive well testing test data of pressure, determines that tired product, pressure recover pressure reduction；
Step 4, according to flow-after-flow test test data, draws the relation straight line of yield and bottom hole pressure difference, determine this straight line intercept,
Slope；
Step 5, the parameter being obtained according to step 1-4, determine hyposmosis and compact oil reservoir oil well drainage front；And
Step 6, the parameter being obtained according to step 1-5, determine hyposmosis and compact oil reservoir formation effective permeability；
In step 2, determine system compressibility CtRelational expression be：
Ct=CoSo+CwSw+Cf,
Cf=(2.587 × 10-4)/Φ0.4358
Formation oil coefficient of compressibility Co, oil saturation So, stratum water coefficient of compressibility Cw, water saturation Sw, rock compressibility Cf、
Porosity Φ；
In steps of 5, hyposmosis and compact oil reservoir oil well drainage front r are determinedePhysical relationship formula be：
Wherein, a is the intercept of this yield and the straight line of bottom hole pressure difference, qcProduce for tired, Δ pwsRecover pressure reduction for pressure.
2. hyposmosis according to claim 1 and compact oil reservoir are independent of the effective permeability of radial flow and determine method, its
It is characterised by, the plurality of formation physical property and fluid parameter include porosity Φ, Effective thickness of formation h, water saturation Sw, oil-containing
Saturation So, well radius rw, oil volume coefficient Bo, formation oil viscosity, muo, formation oil coefficient of compressibility Co, stratum water coefficient of compressibility Cw.
3. hyposmosis according to claim 1 and compact oil reservoir are independent of the effective permeability of radial flow and determine method, its
It is characterised by, in step 6, determine that the physical relationship formula of hyposmosis and compact oil reservoir formation effective permeability k is：Wherein, b is the slope of this yield and the straight line of bottom hole pressure difference.
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| CN104343442B true CN104343442B (en) | 2017-03-08 |
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| US4631677A (en) * | 1984-06-01 | 1986-12-23 | Diamond Oil Well Drilling Company | Method for determining the placement of perforations in a well casing |
| MY130493A (en) * | 2001-01-18 | 2007-06-29 | Shell Int Research | Determining the in situ effective mobility and the effective permeability of a formation. |
| GB2399659B (en) * | 2003-03-20 | 2005-09-28 | Schlumberger Holdings | Method and system for predicting the apparent flow conductivity of a heterogeneous medium |
| US7054751B2 (en) * | 2004-03-29 | 2006-05-30 | Halliburton Energy Services, Inc. | Methods and apparatus for estimating physical parameters of reservoirs using pressure transient fracture injection/falloff test analysis |
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