CN109270245B - Oil sand SAGD movable layer interval top surface dividing method based on lithofacies - Google Patents
Oil sand SAGD movable layer interval top surface dividing method based on lithofacies Download PDFInfo
- Publication number
- CN109270245B CN109270245B CN201811113187.0A CN201811113187A CN109270245B CN 109270245 B CN109270245 B CN 109270245B CN 201811113187 A CN201811113187 A CN 201811113187A CN 109270245 B CN109270245 B CN 109270245B
- Authority
- CN
- China
- Prior art keywords
- lithofacies
- thickness
- steam
- top surface
- oil sand
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Food Science & Technology (AREA)
- Analytical Chemistry (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Remote Sensing (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention discloses a lithofacies-based method for dividing the top surface of an oil sand SAGD movable layer interval. The method comprises the following steps: counting the lithofacies thickness and steam diffusion conditions of mudstone and shale side lamination of the developed oil field; a vapor diffusion situation refers to a situation where vapor may pass through a petrophysical section or where vapor cannot pass through a petrophysical section; establishing an XOY coordinate system, wherein an X coordinate represents the steam diffusion condition, 1 represents that steam can pass through the lithofacies section, 2 represents that steam cannot pass through the lithofacies section, and a Y coordinate represents the thickness of the lithofacies; respectively projecting the calculated lithofacies thickness and the steam diffusion condition of the mudstone and the mudstone side lamination to an XOY coordinate system to obtain data points, and connecting the data points to obtain a characteristic curve; along the Y coordinate, the thickness value interval of two sample points at the jump of the characteristic curve represents the thickness interval of completely blocking vapor diffusion by the lithofacies. The method identifies the top surface of the SAGD movable layer section based on the lithofacies, the division result is more objective and fine, the method is specific and simple, the human factors are reduced, and the result is accurate and reliable.
Description
Technical Field
The invention relates to a lithofacies-based method for dividing the top surface of an oil sand SAGD movable layer section, and belongs to the technical field of oil exploration and development.
Background
The oil sand is a sticky mixture consisting of sand, water, asphalt and clay, has the characteristics of high viscosity, high density and high hydrocarbon ratio, the unconventional energy is usually mined by adopting a Steam Assisted Gravity Drainage (SAGD) method, and the SAGD development process is easily influenced by an interlayer, so that the top surface position of the movable layer section is determined. The lithofacies of the interlayer in the oil sand have mudstone and a argillaceous side deposit, and the steam diffusion condition is in a certain relation with the type of the lithofacies and is closely related with the thickness of the lithofacies.
The current industry consistently selects the depth of an oil production well as the bottom surface of the movable layer section of the oil sand SAGD, and the division method is clear; the recognition of the method for dividing the top surface of the movable interval of the oil sand SAGD is inconsistent and lacks of a unified standard, so that the scale recognition difference of movable reserves is large, and the quality evaluation of the reserves, the well position deployment and the well pair development effect are directly influenced.
Disclosure of Invention
The invention aims to provide a method for dividing the top surface of a movable interval of an oil sand SAGD based on a petrographic phase, which is reasonable, accurate and strong in operability.
The invention provides a lithofacies-based method for dividing the top surface of an oil sand SAGD movable interval, which comprises the following steps:
(1) counting the lithofacies thickness and steam diffusion conditions of mudstone and shale side lamination of the developed oil field;
the developed oil field and the oil field to be divided are required to have similar deposition environments, namely the type of a barrier layer of the oil field is mudstone and a mud side lamination layer;
the steam diffusion condition refers to that steam can pass through the rock phase section or that steam cannot pass through the rock phase section;
(2) establishing an XOY coordinate system, wherein an X coordinate represents the steam diffusion condition, 1 represents that steam can pass through the lithofacies section, 2 represents that steam cannot pass through the lithofacies section, and a Y coordinate represents the thickness of the lithofacies; respectively projecting the lithofacies thickness and the steam diffusion condition of the mudstone and the shale side deposit obtained by statistics in the step (1) into the XOY coordinate system to obtain data points, and connecting the data points to obtain a characteristic curve, namely an oil sand SAGD movable layer section top surface characteristic chart of different lithofacies types (as shown in figure 1);
(3) along the Y coordinate, the thickness value intervals of the two sample points at the jump position of the characteristic curve represent thickness intervals that the lithofacies completely block steam diffusion, namely the thickness intervals are boundaries for dividing the top surface of the oil sand SAGD movable layer section;
in particular, the characteristic curve may be viewed from the bottom up (i.e., along the direction of the Y coordinate).
And preferably, an integer value in the thickness value interval of the two sample points at the jump of the characteristic curve is used as a boundary for dividing the top surface of the oil sand SAGD movable layer section.
For the oil sand mine area where the steam diffusion condition of the mudstone and the argillaceous side deposit cannot be known (namely, the underground condition is obtained without monitoring means, and data cannot be directly obtained to prove the steam diffusion condition), determining the top surface of the oil sand SAGD movable interval according to the following steps:
counting the lithofacies thickness and the lithofacies bottom depth of the mudstone and the argillaceous side deposit of any oil well above the bottom depth of the movable oil sand SAGD layer, and filling the values into a table in a descending order according to the depth values of the lithofacies bottom; and (4) when the thickness of the lithofacies reaches the limit of the oil sand SAGD movable layer section top surface dividing determined in the step (3), taking the depth of the bottom of the lithofacies corresponding to the thickness of the lithofacies as the oil sand SAGD movable layer section top surface.
The above steps require individual statistics of data for each well, and cannot collectively perform statistical processing of data for two or more wells.
Due to the adoption of the technical scheme, the invention has the following advantages:
1. the method is based on developed oil field data, summarizes relevant rules of steam diffusion conditions, lithofacies types and lithofacies thicknesses, guides developers to conduct oil sand SAGD movable interval top surface division work, provides a standard which can be used as a basis for the work, and effectively reduces the uncertainty of the scale of the movable reserve volume.
2. The method identifies the top surface of the SAGD movable layer section based on the lithofacies, the division result is more objective and fine, the method is specific and simple, the human factors are reduced, and the result is accurate and reliable.
In conclusion, the method can be widely applied to the dividing work of the top surface of the oil sand SAGD movable layer section.
Drawings
FIG. 1 is a schematic diagram of the boundaries of the top surface of a mobile interval of oil sand SAGD based on lithofacies, where the left diagram shows the mudstone lithofacies and the right diagram shows the mudside laminated lithofacies.
Detailed Description
The experimental procedures used in the following examples are all conventional procedures unless otherwise specified.
Materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
Examples 1,
1) Based on developed oil field data, the lithofacies type, the lithofacies thickness and the steam diffusion condition of the interlayer are counted. The interlayer in the oil sand influences steam diffusion, and the lithofacies types comprise mudstone and a argillaceous side deposit; a steam spread condition refers to whether steam passes through a certain lithofacies segment, if not, indicating that the SAGD is unable to draw on the reserves above that lithofacies segment.
2) Based on the statistical results of step 1), filling the lithofacies types, lithofacies thicknesses, and steam diffusion conditions into table 1. Wherein for the case of vapor diffusion, 1 represents that vapor can pass through the petrophysical section and 2 represents that vapor cannot pass through the petrophysical section.
TABLE 1 statistical table of interlayer lithofacies and steam diffusion condition of developed oil field from oil sand
3) As shown in fig. 1, an XOY coordinate system is established, an X coordinate is a natural number, a Y coordinate is a lithofacies thickness value, the lithofacies thickness and steam diffusion condition codes of the mudstone lithofacies and the shale side lamination in table 1 are respectively projected into the coordinate system, and data points are connected to form a characteristic curve, so that oil sand SAGD movable layer section top surface characteristic charts of different lithofacies types are formed. Identification is carried out by combining the curves: and viewed from bottom to top (along the Y coordinate direction), the two sample point thickness value intervals at the jump position of the characteristic curve represent the thickness interval of the complete barrier of the petrographic phase to steam diffusion, and integer values in the interval are used as the boundary for dividing the top surface of the movable interval of the oil sand SAGD.
In the left diagram of FIG. 1, a curve jumps from 1.9m to 2.0m, which indicates that the interval represents a thickness interval in which the shale-rock phase completely blocks steam diffusion, and an integer value of 2m in the interval is selected as a limit for dividing the top surface of the movable interval of the oil sand SAGD; in the right diagram of fig. 1, a curve jumps from 2.8m to 3.1m, which indicates that the interval represents a thickness interval in which the shale-side laminated lithofacies completely blocks steam diffusion, and an integer value of 3m in the interval is selected as a boundary for dividing the top surface of the oil sand SAGD movable layer section.
4) For oil sands deposits where steam diffusion is not known, the top surface of the movable SAGD interval may be partitioned by the boundaries obtained in step 3). The thickness and bottom depth value of each mudstone and mudstone side laminated lithofacies of the same well (above the bottom depth of the SAGD movable layer section) are counted first, and the mudstone side laminated lithofacies are arranged and filled in the table 2 in descending order according to the depth values. Sequentially judging from top to bottom, and taking the bottom depth value of the lithofacies as the top surface of the SAGD movable interval when the lithofacies has the following two conditions: (1) t isshale>＝2；(2)TIHS>＝3(Tshale-mudThickness of rock facies, m; t isIHS-thickness of shale side layer lithofacies, m).
TABLE 2A statistical table of interlayer lithofacies conditions of SAGD movable layer section with depth of more than bottom surface
The above embodiments are only used for illustrating the present invention, and the structure, connection mode, manufacturing process, etc. of the components may be changed, and all equivalent changes and modifications performed on the basis of the technical solution of the present invention should not be excluded from the protection scope of the present invention.
Claims (2)
1. A lithofacies-based oil sand SAGD movable interval top surface dividing method comprises the following steps:
(1) counting the lithofacies thickness and steam diffusion conditions of mudstone and shale side lamination of the developed oil field;
the steam diffusion condition refers to that steam can pass through the rock phase section or that steam cannot pass through the rock phase section;
(2) establishing an XOY coordinate system, wherein an X coordinate represents the steam diffusion condition, 1 represents that steam can pass through the lithofacies section, 2 represents that steam cannot pass through the lithofacies section, and a Y coordinate represents the thickness of the lithofacies; respectively projecting the lithofacies thickness and the steam diffusion condition of the mudstone and the argillaceous side deposit obtained by statistics in the step (1) to the XOY coordinate system to obtain data points, and connecting the data points to obtain a characteristic curve;
(3) and along the Y coordinate, the thickness value intervals of the two sample points at the jump position of the characteristic curve represent thickness intervals in which the lithofacies completely block steam diffusion, and integer values in the thickness value intervals of the two sample points at the jump position of the characteristic curve are selected as boundaries for dividing the top surface of the oil sand SAGD movable layer section.
2. The method of dividing the top surface of an oil sand SAGD movable interval according to claim 1, characterized in that: determining the top surface of the oil sand SAGD movable layer section according to the following steps:
counting the lithofacies thickness and the lithofacies bottom depth of the mudstone and the argillaceous side deposit of any oil well above the bottom depth of the movable oil sand SAGD layer; and (4) when the thickness of the lithofacies reaches the limit of the oil sand SAGD movable layer section top surface dividing determined in the step (3), taking the depth of the bottom of the lithofacies corresponding to the thickness of the lithofacies as the oil sand SAGD movable layer section top surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811113187.0A CN109270245B (en) | 2018-09-25 | 2018-09-25 | Oil sand SAGD movable layer interval top surface dividing method based on lithofacies |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811113187.0A CN109270245B (en) | 2018-09-25 | 2018-09-25 | Oil sand SAGD movable layer interval top surface dividing method based on lithofacies |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109270245A CN109270245A (en) | 2019-01-25 |
| CN109270245B true CN109270245B (en) | 2021-05-18 |
Family
ID=65197335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811113187.0A Active CN109270245B (en) | 2018-09-25 | 2018-09-25 | Oil sand SAGD movable layer interval top surface dividing method based on lithofacies |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109270245B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102272418A (en) * | 2008-11-28 | 2011-12-07 | 普拉德研究及开发股份有限公司 | Method for estimation of sagd process characteristics |
| CN104389568A (en) * | 2014-09-29 | 2015-03-04 | 中国石油大学(北京) | Obtaining method and device of gas assisted dosage in steam assisted gravity drainage process |
| CN104809283A (en) * | 2015-04-22 | 2015-07-29 | 中国石油天然气股份有限公司 | Interlayer identification method for heavy oil reservoir |
| CN106285630A (en) * | 2016-09-23 | 2017-01-04 | 中国海洋石油总公司 | A kind of assay method of the peak production capacity of SAGD well |
| CN106468171A (en) * | 2015-08-19 | 2017-03-01 | 中国石油化工股份有限公司 | The laddering glutenite petrofacies method of discrimination of multi information coupling |
| CN106499374A (en) * | 2015-09-07 | 2017-03-15 | 中国石油天然气股份有限公司 | A kind of method that use ammonia improves SAGD development effectiveness |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9483746B2 (en) * | 2009-11-02 | 2016-11-01 | International Business Machines Corporation | Comparing utility and warranty of services |
-
2018
- 2018-09-25 CN CN201811113187.0A patent/CN109270245B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102272418A (en) * | 2008-11-28 | 2011-12-07 | 普拉德研究及开发股份有限公司 | Method for estimation of sagd process characteristics |
| CN104389568A (en) * | 2014-09-29 | 2015-03-04 | 中国石油大学(北京) | Obtaining method and device of gas assisted dosage in steam assisted gravity drainage process |
| CN104809283A (en) * | 2015-04-22 | 2015-07-29 | 中国石油天然气股份有限公司 | Interlayer identification method for heavy oil reservoir |
| CN106468171A (en) * | 2015-08-19 | 2017-03-01 | 中国石油化工股份有限公司 | The laddering glutenite petrofacies method of discrimination of multi information coupling |
| CN106499374A (en) * | 2015-09-07 | 2017-03-15 | 中国石油天然气股份有限公司 | A kind of method that use ammonia improves SAGD development effectiveness |
| CN106285630A (en) * | 2016-09-23 | 2017-01-04 | 中国海洋石油总公司 | A kind of assay method of the peak production capacity of SAGD well |
Non-Patent Citations (3)
| Title |
|---|
| SAGD重油、油砂开采技术的创新进展及思考;思娜等;《石油钻采工艺》;20160120(第01期);第98-104页 * |
| 杜84块西部兴Ⅵ组SAGD底部油藏潜力研究;曲诗萌;《内蒙古石油化工》;20170430(第04期);第104-107页 * |
| 风城超稠油双水平井蒸汽辅助重力泄油开发试验;霍进等;《新疆石油地质》;20121001;第33卷(第5期);第570页第2栏第2、3段 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109270245A (en) | 2019-01-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Kendrick | Turbidite reservoir architecture in the Northern Gulf of Mexico deepwater: insights from the development of Auger, Tahoe, and Ram/Powell fields | |
| CN106503834A (en) | A kind of Forecasting Methodology in the fine and close oil dessert area of the ultralow porosity permeability reservoir of lacustrine facies | |
| CN111722277B (en) | Method and device for describing broken solution trap for broken solution oil and gas reservoir exploration | |
| CN112523750B (en) | Method and device for determining pinch-out position of sand body and storage medium | |
| CN105426620A (en) | Quantitative analysis method and device of main controlling factor of oil layer remaining oil | |
| CN114114458A (en) | Method for predicting sandstone-type uranium ore deep blind ore body under thick-coverage and super-coverage background | |
| CN108487903A (en) | A kind of gentle slope area oil gas advantage dust trajectory quantitatively portrays characterizing method | |
| CN109239783B (en) | Method for accepting or rejecting earthquake information in well earthquake combination | |
| CN109270245B (en) | Oil sand SAGD movable layer interval top surface dividing method based on lithofacies | |
| Liu et al. | The Control Theory and Application for Well Pattern Optimization of Heterogeneous Sandstone Reservoirs | |
| CN110910267A (en) | Method and device for determining marine carbonate rock interlayer | |
| CN111425171A (en) | Water-flooding sandstone reservoir double-high-period two-three combined perforation optimization method | |
| CN105093269A (en) | Method for determining denudation quantity | |
| CN111077592B (en) | Evaluation method of fault lateral plugging master control factors | |
| CN110795513B (en) | Method for predicting distribution of river facies source storage ectopic type compact oil gas dessert area | |
| CN110244357B (en) | Identification method for tectonic destructive ancient oil reservoir | |
| CN114592848A (en) | Method for identifying low-resistivity oil-gas layer by porosity-resistivity-lithology matching relation method | |
| CN113449408A (en) | Stratum pressure calculation method and device for shale gas well | |
| CN113687413A (en) | Method and device for establishing oil and gas accumulation mode | |
| Ye et al. | Facies architecture of the Bluejacket Sandstone in the Eufaula Lake area, Oklahoma: Implications for reservoir characterization of the subsurface Bartlesville Sandstone | |
| CN112147714A (en) | Estuary dam internal structure analysis method | |
| CN106437631B (en) | Oil reservoir recovery method and its device | |
| CN112459766B (en) | Method and device for dividing compound oil and gas reservoirs | |
| Agishev et al. | Reassessment of the potential of oil reserves in thin-layered “hazel grouse” type reservoirs | |
| CN113970790B (en) | Method and device for rapidly evaluating deep-sea water channel reservoir and computer equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |