CN107728227A - Method for rapidly distinguishing sand bodies of underground river in well pattern mature area - Google Patents
Method for rapidly distinguishing sand bodies of underground river in well pattern mature area Download PDFInfo
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- 239000004576 sand Substances 0.000 title claims abstract description 122
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000011160 research Methods 0.000 claims abstract description 14
- 239000002356 single layer Substances 0.000 claims abstract description 10
- 239000010410 layer Substances 0.000 claims description 83
- 230000035800 maturation Effects 0.000 claims description 14
- 230000015572 biosynthetic process Effects 0.000 claims description 9
- IYLGZMTXKJYONK-ACLXAEORSA-N (12s,15r)-15-hydroxy-11,16-dioxo-15,20-dihydrosenecionan-12-yl acetate Chemical compound O1C(=O)[C@](CC)(O)C[C@@H](C)[C@](C)(OC(C)=O)C(=O)OCC2=CCN3[C@H]2[C@H]1CC3 IYLGZMTXKJYONK-ACLXAEORSA-N 0.000 claims description 6
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- 238000004062 sedimentation Methods 0.000 claims description 6
- 238000005192 partition Methods 0.000 claims description 3
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- 238000011084 recovery Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
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- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V9/00—Prospecting or detecting by methods not provided for in groups G01V1/00 - G01V8/00
- G01V9/007—Prospecting or detecting by methods not provided for in groups G01V1/00 - G01V8/00 by detecting gases or particles representative of underground layers at or near the surface
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Abstract
The invention relates to a method for quickly distinguishing sand bodies of an underground river in a well pattern mature area, which comprises the steps of 1), stratigraphic division and comparison, and establishment of an isochronous stratigraphic comparison framework; step 2), drawing a contour map of the thickness of each single-layer sand body; step 3), under the constraint of an isochronal stratigraphic contrast framework, carrying out deposition microphase interpretation according to the well logging curve form and rock debris data; step 4), establishing a deposition microphase database by taking the single layer as a basic unit; step 5), carrying out river sand body identification well by taking any single layer as a research object; step 6), after all wells of the corresponding single layer participate in comparison, carrying out river channel sand body identification of the next single layer until all single layers complete river channel sand body identification; and 7), projecting the recognition results of all wells of any single layer onto the sand body thickness contour map of the single layer according to the well position coordinates, and performing plane combination on the recognized sand body of the underground river channel by taking the sand body thickness contour map as a constraint.
Description
Technical field
The present invention relates to oil gas field reservoir geology research field, specially a kind of well pattern maturation zone Quick buried channel
Sand body method.
Background technology
Oil-gas field development later stage, well pattern comparative maturity, the raising recovery ratio skill based on remaining oil (gas) Study on regularity
Art is the most critical challenge that oil-gas geology scholar faces, and the basis of remaining oil (gas) Study on regularity is known with buried channel
Wei not core accurate reservoir description.
Oil-gas field development later stage, the utilizable abundant information of accurate reservoir description, including drilling well, well logging, well logging, earthquake
Deng single sand body rank can be reached by describing precision in well pattern thickening block, and abundant description achievement is that remaining oil (gas) distribution is pre-
Survey and improve recovery ratio measure adjustment and establish solid foundation.
Cutd open it is noted, however, that traditional accurate reservoir description work sutdy process must be established first to research work area
Surface grids, divide in individual layer and explained with the basis of contrast, carrying out sedimentary micro, then each individual layer of each section is carried out one by one
River course is identified, plane control is carried out with sand thickness isogram, and both combine prediction river course spatial distribution.Although the process can
To be carried out by computer related software, but the problem of some efficiency are low still be present, be mainly manifested in：
(1) section grid is established
Section grid is established and varied with each individual, and the section grid that different geological research personnel establish may be different,
This can produce certain influence to result of study.
(2) river course identifies
The identification of river channel sand first must be identified in section, and identification process is complicated, and being mainly reflected in 1. must be by
Layer is carried out, and is often completed an individual layer, could be carried out next individual layer, and is had in identification process to individual layer progress top pull
It is flat；2. in river course identification process is carried out for each individual layer, it is necessary to which all sections established in the individual layer are carried out
Identification, process are very cumbersome；3. river course identification usually requires completely to identify all river courses, including river course main body, river
Road edge, plane restriction then is carried out further according to sand thickness isogram, predict river course spatial distribution, it means that cuing open
Two face, plane angles are required for carrying out river course prediction, it is clear that this generates a certain amount of repetitive operation.
(3) survey region well number
In general oil gas field is in development late stage, and well number is numerous, and some up to up to ten thousand mouthfuls of wells, this has been further exacerbated by research work
The triviality of work, operating efficiency are low.Therefore, with needing a kind of fast and efficiently oil-gas field development later stage Quick of exploitation badly
Lower river channel sand method.
The content of the invention
For problems of the prior art, the present invention provides a kind of well pattern maturation zone Quick buried channel sand body
Method, operating efficiency is high, judges that speed is fast, easy to operate, accuracy of judgement.
The present invention is to be achieved through the following technical solutions：
A kind of well pattern maturation zone Quick buried channel sand body method, comprises the following steps；
Step 1), stratigraphic partition and correlation, to the research all well STRATIGRAPHIC DIVISIONs in area to individual layer rank, stratum pair when establishing etc.
Compare screen work；
Step 2), draw the sand thickness isogram of each individual layer；
Step 3), under the constraint of isochronal formation cor-relation screen work, it is micro- that deposition is carried out according to form of logs and landwaste data
Mutually explain, identify river course microfacies, flood plain microfacies and excessive bank sedimentary micro three types；
Step 4), using individual layer as base unit, establish sedimentary micro database；One single layer data of every mouth well includes
Individual layer title, well-name, the top depth and bottom depth of all Microfacies Types and each microfacies；
Step 5), using any one individual layer as research object, carry out river channel sand identification by well；Its judgement to every mouth well
Standard is as follows,
If only identifying river course microfacies, judge that the well is in inside buried channel sand body；
If only identifying excessive bank microfacies, judge that the well is in outside buried channel sand body；
If identifying two kinds of microfacies of river course microfacies and flood plain microfacies, river course microfacies top depth is equal to flood plain
Microfacies bottom depth, judge that the well is in inside buried channel sand body；
If identifying two kinds of microfacies of river course microfacies and excessive bank microfacies, bank microfacies top depth of overflowing is equal to river course microfacies bottom
Depth, judge that the well is in buried channel sand body edge；
If identifying two kinds of microfacies of flood plain microfacies and excessive bank microfacies, bank microfacies top depth of overflowing is equal to flood plain
Microfacies bottom depth, judge that the well is in outside buried channel sand body；
If identifying three kinds of river course microfacies, flood plain microfacies and excessive bank microfacies microfacies, bank microfacies top depth etc. of overflowing
In river course microfacies bottom depth, river course microfacies top depth is equal to flood plain microfacies bottom depth, judges that the well is in underground
River channel sand edge；
Step 6) then carries out the channel sand of next individual layer after the well all as individual layer corresponding to research is involved in contrast
Body identifies, until all individual layers are fully completed river channel sand identification；
Step 7), the sand thickness by the recognition result of all wells of any one individual layer according to well location coordinate projection to the individual layer
Isogram gets on, and using sand thickness isogram as constraint, carries out plane combination to the buried channel sand body identified, completes
The quick judgement of well pattern maturation zone buried channel sand body.
Preferably, individual layer is the vertical stratigraphic unit being made up of single sedimentation unit in step 1)；By the identical of different wells
Sedimentation unit in time, which links up, establishes isochronal formation cor-relation screen work.
Preferably, when the sand thickness isogram of each individual layer is drawn in step 2), sand thickness data source is in survey
The explanation results of well data.
Preferably, when sedimentary micro database is established in step 4)；
Sedimentary micro is numbered first, microfacies numbering in river course is I, and flood plain microfacies numbering is II, bank microfacies of overflowing
Numbering is III；
Secondly in units of individual layer, the sedimentary micro identified to all wells carries out data loading.
Preferably, when plane combination is carried out in step 7), the well in individual layer is made the following judgment；
If the position of well belongs to inside river channel sand, it necessarily falls the area that thickness is big in sand thickness isogram
Domain, the big region of thickness refers to that sand thickness is more than 75% of maximum gauge in the individual layer isogram, less than or equal to the individual layer
Maximum gauge in isogram；
If the position of well belongs to river channel sand edge, it necessarily falls the thickness large area in sand thickness isogram
The left side or the right；Thickness large area refers to that sand thickness is more than 25% of maximum gauge in the individual layer isogram, is less than
Equal to 75% of maximum gauge in the individual layer isogram；
If the position of well belongs to river channel sand edge, it necessarily falls the area that thickness is minimum in sand thickness isogram
Domain；The minimum region of thickness refers to that sand thickness is more than or equal to 0% of maximum gauge in the individual layer isogram, less than or equal to this
The 25% of maximum gauge in individual layer isogram.
Further, if the position of well belongs to river channel sand edge, if its position in depth isoline graph falls in thickness
The left side of large area, then belong to the left margin of river channel sand.If its position in depth isoline graph falls larger in thickness
The right in region, then belong to the right margin of river channel sand.
Compared with prior art, the present invention has technique effect beneficial below：
When the present invention carries out river channel sand position judgment, it is not necessary to which, by section grid, relying solely on individual well can complete；
Using the single well in individual layer as research object, analyzed only by the sedimentary micro stacked relation to single well, Bian Kesuo
The river channel sand at place is quickly judged, it is not necessary to the flat processing of top pull is carried out to individual layer；Order can flexibly be identified simultaneously
Adjustment, after both all individual layer identifications being carried out to a bite well, then identifies lower a bite well, can also be to owning in some individual layer
After well is identified, then next individual layer is identified, without as conventional method, it is necessary to first will be to some individual layer
After interior all wells are identified, next individual layer could be carried out and be identified；In the oil-gas field development later stage, well number is numerous, traditional river
Road identifies intricate operation, and efficiency is low, the inventive method, can efficiently identify buried channel sand body, while easy to operate.
Brief description of the drawings
Fig. 1 is a kind of well pattern maturation zone Quick buried channel of the invention sand body method flow diagram.
Fig. 2 is to carry out the schematic diagram of river channel sand identification using well A sedimentary micro described in present example.
Fig. 3 is the schematic diagram for carrying out river channel sand identification described in present example using well B and well B' sedimentary micro.
Fig. 4 is to carry out the schematic diagram of river channel sand identification using well C sedimentary micro described in present example.
Fig. 5 is the schematic diagram for carrying out river channel sand identification described in present example using well D and well D' sedimentary micro.
Fig. 6 is to carry out the schematic diagram of river channel sand identification using well E sedimentary micro described in present example.
Fig. 7 is to carry out the schematic diagram of river channel sand identification using well F sedimentary micro described in present example.
Embodiment
With reference to specific embodiment, the present invention is described in further detail, it is described be explanation of the invention and
It is not to limit.
A kind of well pattern maturation zone Quick buried channel of the invention sand body method, for oil-gas field development later development well
The many blocks of number, are quickly judged river channel sand border.As shown in figure 1, it mainly comprises the following steps.
1) stratigraphic partition and correlation, to the research all well STRATIGRAPHIC DIVISIONs in area to individual layer rank, isochronal formation cor-relation lattice are established
Frame.
Individual layer refers to the vertical stratigraphic unit being made up of single sedimentation unit in step 1)；By in the same time of different wells
Sedimentation unit link up and establish isochronal formation cor-relation screen work.
2) the sand thickness isogram of each individual layer is drawn.
Step 2) sand thickness data source is in interpretation of logging data result.
3) according to form of logs, sedimentary micro is carried out to every mouth well and explained.
Sedimentary micro is depositional environment and the synthesis of deposit in step 3)；Sedimentary micro, which is explained, to be referred to according to log
Form, the identification of landwaste data are under the constraint of isochronal formation cor-relation screen work, identification river course, flood plain, bank sedimentary micro of overflowing.It is each
The species of microfacies may have 3 kinds of situations in some individual layer of mouth well：1. only exist a kind of microfacies；2. 2 kinds of microfacies be present；3. in the presence of 3
Kind microfacies.
4) using individual layer as base unit, sedimentary micro database is established.
Sedimentary micro is numbered first in step 4), microfacies numbering in river course is I, and flood plain microfacies numbering is II,
Bank microfacies of overflowing numbering is III；Secondly in units of individual layer, the sedimentary micro identified to all wells carries out data loading.Such as A wells a
Individual layer, identify I, II, III 3 kind of microfacies, then record individual layer title a, well-name A, microfacies I, the top depth of microfacies I, microfacies respectively
I bottom depth, microfacies II, the top depth of microfacies II, the bottom depth of microfacies II, microfacies III, the top depth of microfacies III, the bottom of microfacies III
Portion's depth.
5) using a certain individual layer as research object, river channel sand identification is carried out by well；
Step 5) criterion is：Assuming that in a individual layer wells A；
If only identify microfacies I, then it is assumed that the well is in inside buried channel sand body；
If only identify microfacies III, then it is assumed that the well is in outside buried channel sand body；
If identifying I and II two kind of microfacies, the bottom depth of I top depth of microfacies=microfacies II, it is believed that the well is in ground
Inside lower river channel sand；
If identifying I and III two kind of microfacies, the bottom depth of III top depth of microfacies=microfacies I, then it is assumed that the well is in
Buried channel sand body edge；
If identifying II and III two kind of microfacies, the bottom depth of III top depth of microfacies=microfacies II, then it is assumed that the Jing Chu
Outside buried channel sand body；
If identifying I, II and III 3 kind of microfacies, the bottom depth of III top depth of microfacies=microfacies I, the top of microfacies I is deeply
The bottom depth of degree=microfacies II, then it is assumed that the well is in buried channel sand body edge；
Judge respectively such as going into the well after concrete application.
As shown in Fig. 2 well A only only bores in individual layer a has met river course microfacies I, show that the well is in inside river channel sand；
As shown in figure 3, well B and well B' is in the vertical microfacies development characteristics of individual layer a：River course microfacies is stacked in excessive bank microfacies
On, show that the well is in river channel sand edge；
As shown in figure 4, well C is in the vertical microfacies development characteristics of individual layer a：Flood plain microfacies be stacked in river course microfacies it
On, show that the well is in inside river channel sand；
As shown in figure 5, well D and well D' is in the vertical microfacies development characteristics of the individual layer：Flood plain microfacies is stacked in river course
On microfacies, while river course microfacies is stacked on excessive bank microfacies, shows that the well is in river channel sand edge；
As shown in fig. 6, well E only bores in the individual layer has met excessive bank microfacies, show that the well is in outside river channel sand；
As shown in fig. 7, well F is in the vertical microfacies development characteristics of the individual layer：Flood plain microfacies be stacked in excessive bank microfacies it
On, show that the well is in outside river channel sand.
6) after all wells of the individual layer are involved in contrast, then the river channel sand identification of next individual layer is carried out, until all
Individual layer all carries out river channel sand identification；
7) certain individual layer recognition result is projected into the sand thickness isogram of the individual layer up, it is equivalent with reference to sand thickness
Line chart, plane combination is carried out to the buried channel sand body identified.
Step 7) midplane combined method refers to, it is assumed that in a individual layer wells A；
If belonging to inside river channel sand, it necessarily falls the region that thickness is big in sand thickness isogram, and thickness is big
Region refer to sand thickness be more than the individual layer isogram in maximum gauge 75%, less than or equal in the individual layer isogram
Maximum gauge；
If belonging to river channel sand edge, if its position in depth isoline graph falls on the left side of thickness large area,
Then belong to the left margin of river channel sand.If its position in depth isoline graph falls on the right of thickness large area, belong to
In the right margin of river channel sand.Thickness large area refers to that sand thickness is more than maximum gauge in the individual layer isogram
25%, less than or equal to 75% of maximum gauge in the individual layer isogram；
If belonging to river channel sand edge, it necessarily falls the thickness in sand thickness isogram minimum (even zero)
Region；The minimum region of thickness refers to that sand thickness is more than or equal to 0% of maximum gauge in the individual layer isogram, is less than or equal to
The 25% of maximum gauge in the individual layer isogram.
Under the application of Soviet Union's Sulige gas field block (700 mouthfuls of wells), operating efficiency improves method of the present invention
30%, recognition result is applied to be used as constraints in three-dimensional geological modeling so that model coincidence rate improves 8%, and effect is bright
It is aobvious.
The technological thought of above content only to illustrate the invention, it is impossible to protection scope of the present invention is limited with this, it is every to press
According to technological thought proposed by the present invention, any change done on the basis of technical scheme, claims of the present invention is each fallen within
Protection domain within.
Claims (6)
1. a kind of well pattern maturation zone Quick buried channel sand body method, it is characterised in that comprise the following steps；
Step 1), stratigraphic partition and correlation, to the research all well STRATIGRAPHIC DIVISIONs in area to individual layer rank, establish isochronal formation cor-relation lattice
Frame；
Step 2), draw the sand thickness isogram of each individual layer；
Step 3), under the constraint of isochronal formation cor-relation screen work, sedimentary micro solution is carried out according to form of logs and landwaste data
Release, identify river course microfacies, flood plain microfacies and excessive bank sedimentary micro three types；
Step 4), using individual layer as base unit, establish sedimentary micro database；One single layer data of every mouth well includes individual layer
Title, well-name, the top depth and bottom depth of all Microfacies Types and each microfacies；
Step 5), using any one individual layer as research object, carry out river channel sand identification by well；Its criterion to every mouth well
It is as follows,
If only identifying river course microfacies, judge that the well is in inside buried channel sand body；
If only identifying excessive bank microfacies, judge that the well is in outside buried channel sand body；
If identifying two kinds of microfacies of river course microfacies and flood plain microfacies, river course microfacies top depth is equal to flood plain microfacies
Bottom depth, judge that the well is in inside buried channel sand body；
If identifying two kinds of microfacies of river course microfacies and excessive bank microfacies, it is deep that bank microfacies of overflowing top depth is equal to river course microfacies bottom
Degree, judges that the well is in buried channel sand body edge；
If identifying two kinds of microfacies of flood plain microfacies and excessive bank microfacies, bank microfacies top depth of overflowing is equal to flood plain microfacies
Bottom depth, judge that the well is in outside buried channel sand body；
If identifying three kinds of river course microfacies, flood plain microfacies and excessive bank microfacies microfacies, bank microfacies top depth of overflowing is equal to river
Road microfacies bottom depth, river course microfacies top depth are equal to flood plain microfacies bottom depth, judge that the well is in buried channel
Sand body edge；
Step 6) after the well all as individual layer corresponding to research is involved in contrast, then know by the river channel sand for carrying out next individual layer
Not, until all individual layers are fully completed river channel sand identification；
Step 7), the recognition result of all wells of any one individual layer is equivalent according to the sand thickness of well location coordinate projection to the individual layer
Line chart gets on, and using sand thickness isogram as constraint, carries out plane combination to the buried channel sand body identified, completes well pattern
The quick judgement of maturation zone buried channel sand body.
A kind of 2. well pattern maturation zone Quick buried channel sand body method according to claim 1, it is characterised in that step
It is rapid 1) in individual layer be the vertical stratigraphic unit being made up of single sedimentation unit；Sedimentation unit in the same time of different wells is connected
Get up to establish isochronal formation cor-relation screen work.
A kind of 3. well pattern maturation zone Quick buried channel sand body method according to claim 1, it is characterised in that step
During the sand thickness isogram of rapid 2) the middle each individual layer of drafting, sand thickness data source is in the explanation results of well-log information.
A kind of 4. well pattern maturation zone Quick buried channel sand body method according to claim 1, it is characterised in that step
It is rapid 4) in when establishing sedimentary micro database；
Sedimentary micro is numbered first, microfacies numbering in river course is I, and flood plain microfacies numbering is II, bank microfacies of overflowing numbering
For III；
Secondly in units of individual layer, the sedimentary micro identified to all wells carries out data loading.
A kind of 5. well pattern maturation zone Quick buried channel sand body method according to claim 1, it is characterised in that step
During rapid 7) middle progress plane combination, the well in individual layer is made the following judgment；
If the position of well belongs to inside river channel sand, it necessarily falls the region that thickness is big in sand thickness isogram, thick
Spend big region and refer to that sand thickness is more than 75% of maximum gauge in the individual layer isogram, less than or equal to the individual layer isopleth
Maximum gauge in figure；
If the position of well belongs to river channel sand edge, it necessarily falls a left side for the thickness large area in sand thickness isogram
Side or the right；Thickness large area refers to that sand thickness is more than 25% of maximum gauge in the individual layer isogram, is less than or equal to
The 75% of maximum gauge in the individual layer isogram；
If the position of well belongs to river channel sand edge, it necessarily falls the region that thickness is minimum in sand thickness isogram；
The minimum region of thickness refers to that sand thickness is more than or equal to 0% of maximum gauge in the individual layer isogram, less than or equal to the list
The 25% of maximum gauge in layer isogram.
A kind of 6. well pattern maturation zone Quick buried channel sand body method according to claim 5, it is characterised in that if
The position of well belongs to river channel sand edge, if its position in depth isoline graph falls on the left side of thickness large area,
Belong to the left margin of river channel sand；If its position in depth isoline graph falls on the right of thickness large area, belong to
The right margin of river channel sand.
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| CN112684512A (en) * | 2021-01-05 | 2021-04-20 | 中国石油天然气股份有限公司 | River channel identification method |
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