CN107676084A - Fine and close oil reservoir long horizontal sections trajectory design method - Google Patents
Fine and close oil reservoir long horizontal sections trajectory design method Download PDFInfo
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- CN107676084A CN107676084A CN201710707300.7A CN201710707300A CN107676084A CN 107676084 A CN107676084 A CN 107676084A CN 201710707300 A CN201710707300 A CN 201710707300A CN 107676084 A CN107676084 A CN 107676084A
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000004576 sand Substances 0.000 claims abstract description 27
- 238000005553 drilling Methods 0.000 claims abstract description 8
- 238000010276 construction Methods 0.000 claims description 49
- 239000010410 layer Substances 0.000 claims description 29
- 230000002349 favourable effect Effects 0.000 claims description 22
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 230000035699 permeability Effects 0.000 claims description 11
- 230000015572 biosynthetic process Effects 0.000 claims description 10
- 208000035126 Facies Diseases 0.000 claims description 5
- 239000011229 interlayer Substances 0.000 claims description 5
- 230000000704 physical effect Effects 0.000 claims description 5
- 239000011435 rock Substances 0.000 claims description 5
- 230000007704 transition Effects 0.000 claims description 4
- 238000009738 saturating Methods 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 241001074085 Scophthalmus aquosus Species 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000031068 symbiosis, encompassing mutualism through parasitism Effects 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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- Geochemistry & Mineralogy (AREA)
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Abstract
The present invention provides a kind of fine and close oil reservoir long horizontal sections trajectory design method, reasonable for the specific geologic feature of fine and close oily long horizontal sections, trajectory design method, it is ensured that larger layer of sand Drilling ratio and oil reservoir brill rate；With 20 mouthfuls of water horizontal wells instructing of the present invention, layer of sand Drilling ratio reaches more than 90%, reservoir-encountered rate more than 80%, and has tried out 100m3High yield commercial oil above, it is rational to illustrate trajectory design method of the present invention.
Description
Technical field
The present invention relates to oil field development, earthquake, geology and reservoir engineering, and in particular to a kind of fine and close oil reservoir long horizontal sections rail
Mark design method.
Background technology
At present, existing horizontal well path design mainly includes herein below：According to sedimentary facies, reservoir lithology, physical property, structure
Make, offset well drilling well and formation testing situation etc. determine well spacing Favorable Areas；Determine before Horizontal Well Targets away from the ginseng such as, horizontal section length and orientation
Number；Reservoir three-dimensional geological model is established, determines the track of target spot.
But Ordos Basin, which grows 7 fine and close oil reservoirs, its special geology characteristic：Pore throat character is complicated, and reservoir properties are poor,
Mean permeability is generally less than 0.3mD；Basin tight sandstone reservoir and hydrocarbon source rock alternating layers symbiosis, single phase sand thickness is small, every folder
Layer development, conventional trajectory design method bad adaptability, layer of sand and reservoir-encountered rate are difficult to ensure that.
The content of the invention
Deficiency in existing for prior art, the present invention provide a kind of fine and close oil reservoir long horizontal sections trajectory design method,
Practical, the reliable fine and close oil reservoir long horizontal sections Trajectory Design technology for being applied to long 7 fine and close oil reservoirs is provided.
To reach above-mentioned purpose, the present invention is achieved through the following technical solutions：
Fine and close oil reservoir long horizontal sections trajectory design method, comprises the following steps：
Step 1) draws the sand thickness figure of substratum according to reference lamina, thickness principle, cycle principle, subdivision substratum；
Step 2), with reference to outcrop, well-log information, divides sedimentary subfacies and microfacies based on rock core and thin slice data,
It is determined that favourable sedimentary micro；
Step 3) gathers seismic data, is referred to routine, inverting seismic profile, with reference to well point geologic information, determined small
The formation of amplitude construction, portray sand top construction and layer top construction；
Step 4) is on the basis of sand thickness figure, according to the physical data of individual well, physical property of sketching figure, including porosity
Figure, permeability figure and core intersection figure；
Step 5) collects, arranges offset well drilling well, formation testing and the means of production；
Step 6) determines well spacing Favorable Areas；
Step 7) disposes horizontal well in well spacing Favorable Areas by vertical orientation of principal stress, and in certain intervals
Determine target spot；
Step 8) calculates the construction of each target spot：
(8.1) oil reservoir well nearest from well head flatly is determined, the construction difference of this well and well head is determined on structural map, so
Afterwards according to the top bottom structured value of this well oil layer section, oil reservoir top, the structured value at bottom at well head are calculated respectively；
(8.2) according to step (8.1) identical method, calculate the structured value at oil reservoir top, bottom at last target spot；
(8.3) unit of account gradient is constructed according to the oil reservoir top bottom at well head and last target spot respectively：
Oil reservoir top unit gradient=(oil reservoir top constructs at construction-last target spot of well head oil reservoir top)/well head is to the end
Distance at one target spot
Oil reservoir bill kept on file position gradient=(oil reservoir bottom constructs at construction-last target spot of well head oil reservoir bottom)/well head is to the end
Distance at one target spot
(8.4) construction at oil reservoir top bottom at each target spot is calculated；
Oil reservoir top construction-oil reservoir top unit gradient × well head to this target spot at oil reservoir top construction=well head at certain target spot
Distance
Oil reservoir bottom construction-oil reservoir bill kept on file position gradient × well head to this target spot at oil reservoir bottom construction=well head at certain target spot
Distance
(8.5) the design structured value at each target spot is determined, its method is as follows：
1. oil reservoir top construction -3 at the=the first target spot is constructed at the first target spot；
2. construction=(oil reservoir bottom at construction+last target spot of oil reservoir top at last target spot at last target spot
Construction)/2；
3. according to step 1. with step 2. calculated level section well unit gradient：
Unit gradient=(being constructed at the first target spot at construction-last target spot)/horizontal section length；
4. structured value is designed among calculating at target spot：
Distance of construction-unit gradient × this target spot to the first target spot at the=the first target spot of construction at certain target spot.
Further, the favourable sedimentary micro described in step 2) is the turbidity channel microfacies of half deep lacustrine facies.
Further, the well spacing Favorable Areas that step 6) determines meets following index：
(1) the grand position of the nose of sand top structural map and transition region；
(2) long 72(or long 71) sand thickness is more than 12m；
(3) long 72(or long 71) core intersection is more than 9m；
(4) long 72(or long 71) porosity be more than 10%；
(5) long 72(or long 71) permeability is more than 0.1mD；
(6) new well spacing offset well tested production value is high, and production feature is stable.
Further, step (8.1) determines not considering every interlayer less than 2m during oil layer section, and permeability is more than 0.1mD's
Dried layer is considered by oil layer section.
Further, horizontal well is disposed by vertical orientation of principal stress in well spacing Favorable Areas in step 7), and pressed
100m interval determines target spot.
Further, step (8.1) oil reservoir well refers to straight well
The fine and close oil reservoir long horizontal sections trajectory design method of the present invention, for the specific geology of compact reservoir " sand mud mixes layer "
Feature, determine during Trajectory Design not considering every interlayer less than 2m during oil layer section, dried layer of the permeability more than 0.1mD is pressed
Oil layer section considers, it is ensured that larger layer of sand Drilling ratio and reservoir-encountered rate；The 20 mouthfuls of water horizontal wells instructed with the present invention, layer of sand bore
Encountering rate reaches more than 90%, reservoir-encountered rate more than 80%, and formation testing has tried out 100m3High yield commercial oil above,
It is rational to illustrate trajectory design method of the present invention.
Brief description of the drawings
Fig. 1 is horizontal well path design flow diagram of the present invention
Embodiment
With reference to specific embodiment, the present invention will be further described, the embodiment provided only for illustrating the present invention,
The scope being not intended to be limiting of the invention.
The method of the present invention is realized using following steps：
1) the sand thickness figure of substratum is drawn according to reference lamina, thickness principle, cycle principle, subdivision substratum；
2) based on rock core and thin slice data, with reference to outcrop, well-log information, sedimentary subfacies and microfacies are divided, it is determined that
Favourable sedimentary micro；
Favourable sedimentary micro described in step 2) is the turbidity channel microfacies of half deep lacustrine facies；
3) seismic data is gathered, is referred to routine, inverting seismic profile, with reference to well point geologic information, it is determined that by a small margin
The formation of construction, portray sand top construction and layer top construction；
4) on the basis of sand thickness figure, according to the physical data of individual well, physical property of sketching figure, including porosity figure, ooze
Saturating rate figure and core intersection figure.
5) collect, arrange offset well drilling well, formation testing and the means of production；
6) well spacing Favorable Areas is determined；
The well spacing Favorable Areas that step 6) determines should meet following index：
(1) the grand position of the nose of sand top structural map and transition region；
(2) long 72(or long 71) sand thickness is more than 12m；
(3) long 72(or long 71) core intersection is more than 9m；
(4) long 72(or long 71) porosity be more than 10%；
(5) long 72(or long 71) permeability is more than 0.1mD；
(6) new well spacing offset well tested production value is higher, and production feature is stable.
7) by vertical orientation of principal stress deployment horizontal well in well spacing Favorable Areas, and determine in certain intervals
Target spot；
8) construction of each target spot is calculated：
(8.1) oil reservoir well (straight well) nearest from well head flatly is determined, the construction of this well and well head is determined on structural map
Difference, then according to the top bottom structured value of this well oil layer section, oil reservoir top, the structured value at bottom at well head are calculated respectively；
In step (8.1), the determination method of oil layer section：Do not considered less than 2m every interlayer, permeability is more than 0.1mD's
Dried layer is considered by oil layer section.
(8.2) according to step (1) identical method, calculate the structured value at oil reservoir top, bottom at last target spot；
(8.3) unit of account gradient is constructed according to the oil reservoir top bottom at well head and last target spot respectively：
Oil reservoir top (bottom) unit gradient=(oil reservoir top (bottom) structure at construction-last target spot of well head oil reservoir top (bottom)
Make) the distance of/well head at a last target spot
(8.4) construction at oil reservoir top bottom at each target spot is calculated, oil reservoir at oil reservoir top (bottom) construction=well head at certain target spot
Push up the distance of (bottom) construction-oil reservoir top (bottom) unit gradient × well head to this target spot
(8.5) the design structured value at each target spot is determined, its method is as follows：
1. oil reservoir top construction -3 at the=the first target spot is constructed at the first target spot；
2. construction=(oil reservoir bottom at construction+last target spot of oil reservoir top at last target spot at last target spot
Construction)/2；
3. according to 1. and 2. calculated level section well unit gradient：
Unit gradient=(being constructed at the first target spot at construction-last target spot)/horizontal section length；
4. structured value is designed among calculating at target spot：
Distance of construction-unit gradient × this target spot to the first target spot at the=the first target spot of construction at certain target spot.
Embodiment：
1) according to reference lamina, thickness principle, cycle principle, substratum is segmented, and draw the sand thickness figure of substratum.
2) based on rock core and thin slice data, with reference to outcrop, well-log information, sedimentary subfacies and microfacies are divided, it is determined that
Favourable sedimentary micro.
Favourable sedimentary micro described in step 2) is the turbidity channel microfacies of half deep lacustrine facies.
3) seismic data is gathered, is referred to routine, inverting seismic profile, with reference to well point geologic information, it is determined that by a small margin
The formation of construction, portray sand top construction and layer top construction.
4) on the basis of sand thickness figure, according to the physical data of individual well, physical property of sketching figure, including porosity figure, ooze
Saturating rate figure and core intersection figure.
5) collect, arrange offset well drilling well, formation testing and the means of production.
6) well spacing Favorable Areas is determined.
The well spacing Favorable Areas that step 6) determines should meet following index：
(1) the grand position of the nose of sand top structural map and transition region；
(2) long 72(or long 71) sand thickness is more than 12m；
(3) long 72(or long 71) core intersection is more than 9m；
(4) long 72(or long 71) porosity be more than 10%；
(5) long 72(or long 71) permeability is more than 0.1mD；
(6) new well spacing offset well tested production value is higher, and production feature is stable.
7) by vertical orientation of principal stress deployment horizontal well in well spacing Favorable Areas, and determine in certain intervals
Target spot.
8) construction of each target spot is calculated：
(8.1) oil reservoir well (straight well) nearest from well head flatly is determined, the construction of this well and well head is determined on structural map
Difference, then according to the top bottom structured value of this well oil layer section, oil reservoir top, the structured value at bottom at well head are calculated respectively.
In step (8.1), the determination method of oil layer section：Do not considered less than 2m every interlayer, permeability is more than 0.1mD's
Dried layer is considered by oil layer section.
(8.2) according to step (1) identical method, calculate the structured value at oil reservoir top, bottom at last target spot.
(8.3) unit of account gradient is constructed according to the oil reservoir top bottom at well head and last target spot respectively：
Oil reservoir top (bottom) unit gradient=(oil reservoir top (bottom) structure at construction-last target spot of well head oil reservoir top (bottom)
Make) the distance of/well head at a last target spot
(8.4) construction at oil reservoir top bottom at each target spot is calculated, such as
Oil reservoir top (bottom) construction-oil reservoir top (bottom) unit gradient × well at oil reservoir top (bottom) construction=well head at certain target spot
Mouth arrives the distance of this target spot
(8.5) the design structured value at each target spot is determined, its method is as follows：
1. oil reservoir top construction -3 at the=the first target spot is constructed at the first target spot；
2. construction=(oil reservoir bottom at construction+last target spot of oil reservoir top at last target spot at last target spot
Construction)/2；
3. according to 1. and 2. calculated level section well unit gradient：
Unit gradient=(being constructed at the first target spot at construction-last target spot)/horizontal section length；
4. structured value is designed among calculating at target spot：
Distance of construction-unit gradient × this target spot to the first target spot at the=the first target spot of construction at certain target spot.
Claims (6)
1. fine and close oil reservoir long horizontal sections trajectory design method, it is characterised in that comprise the following steps：
Step 1) draws the sand thickness figure of substratum according to reference lamina, thickness principle, cycle principle, subdivision substratum；
Step 2), with reference to outcrop, well-log information, divides sedimentary subfacies and microfacies based on rock core and thin slice data, it is determined that
Favourable sedimentary micro；
Step 3) gathers seismic data, is referred to routine, inverting seismic profile, with reference to well point geologic information, it is determined that by a small margin
The formation of construction, portray sand top construction and layer top construction；
Step 4) is on the basis of sand thickness figure, according to the physical data of individual well, physical property of sketching figure, including porosity figure, ooze
Saturating rate figure and core intersection figure；
Step 5) collects, arranges offset well drilling well, formation testing and the means of production；
Step 6) determines well spacing Favorable Areas；
Step 7) disposes horizontal well in well spacing Favorable Areas by vertical orientation of principal stress, and determines in certain intervals
Target spot；
Step 8) calculates the construction of each target spot：
(8.1) oil reservoir well nearest from well head flatly is determined, the construction difference of this well and well head, Ran Hougen are determined on structural map
The top bottom structured value of well oil layer section accordingly, oil reservoir top, the structured value at bottom at well head are calculated respectively；
(8.2) according to step (8.1) identical method, calculate the structured value at oil reservoir top, bottom at last target spot；
(8.3) unit of account gradient is constructed according to the oil reservoir top bottom at well head and last target spot respectively：
Oil reservoir top unit gradient=(oil reservoir top constructs at construction-last target spot of well head oil reservoir top)/well head is to last one
Distance at target spot
Oil reservoir bill kept on file position gradient=(oil reservoir bottom constructs at construction-last target spot of well head oil reservoir bottom)/well head is to last one
Distance at target spot
(8.4) construction at oil reservoir top bottom at each target spot is calculated；
At certain target spot at oil reservoir top construction=well head oil reservoir top construction-oil reservoir top unit gradient × well head to this target spot distance
At certain target spot at oil reservoir bottom construction=well head oil reservoir bottom construction-oil reservoir bill kept on file position gradient × well head to this target spot distance
(8.5) the design structured value at each target spot is determined, its method is as follows：
1. oil reservoir top construction -3 at the=the first target spot is constructed at the first target spot；
2. construction=(oil reservoir bottom structure at construction+last target spot of oil reservoir top at last target spot at last target spot
Make)/2；
3. according to step 1. with step 2. calculated level section well unit gradient：
Unit gradient=(being constructed at the first target spot at construction-last target spot)/horizontal section length；
4. structured value is designed among calculating at target spot：
Distance of construction-unit gradient × this target spot to the first target spot at the=the first target spot of construction at certain target spot.
2. fine and close oil reservoir long horizontal sections trajectory design method as claimed in claim 1, it is characterised in that：Having described in step 2)
The sedimentary micro of profit is the turbidity channel microfacies of half deep lacustrine facies.
3. fine and close oil reservoir long horizontal sections trajectory design method as claimed in claim 1, it is characterised in that：The cloth that step 6) determines
Well Favorable Areas meets following index：
(1) the grand position of the nose of sand top structural map and transition region；
(2) long 72(or long 71) sand thickness is more than 12m；
(3) long 72(or long 71) core intersection is more than 9m；
(4) long 72(or long 71) porosity be more than 10%；
(5) long 72(or long 71) permeability is more than 0.1mD；
(6) new well spacing offset well tested production value is high, and production feature is stable.
4. fine and close oil reservoir long horizontal sections trajectory design method as claimed in claim 1, it is characterised in that：Step (8.1) determines
Do not considered during oil layer section less than 2m every interlayer, dried layer of the permeability more than 0.1mD is considered by oil layer section.
5. fine and close oil reservoir long horizontal sections trajectory design method as claimed in claim 1, it is characterised in that：In well spacing in step 7)
By vertical orientation of principal stress deployment horizontal well in Favorable Areas, and target spot is determined by 100m interval.
6. fine and close oil reservoir long horizontal sections trajectory design method as claimed in claim 1, it is characterised in that：Step (8.1) oil reservoir
Well refers to straight well.
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| CN201710707300.7A CN107676084A (en) | 2017-08-17 | 2017-08-17 | Fine and close oil reservoir long horizontal sections trajectory design method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113221219A (en) * | 2021-05-08 | 2021-08-06 | 北京金阳普泰石油技术股份有限公司 | Construction method and system for adjacent well structure profile in horizontal well target design |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104695862A (en) * | 2013-12-06 | 2015-06-10 | 中国石油天然气股份有限公司 | Drilling geological design method of compact sandstone lithology gas reservoir horizontal well |
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2017
- 2017-08-17 CN CN201710707300.7A patent/CN107676084A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104695862A (en) * | 2013-12-06 | 2015-06-10 | 中国石油天然气股份有限公司 | Drilling geological design method of compact sandstone lithology gas reservoir horizontal well |
| CN105604483A (en) * | 2015-12-29 | 2016-05-25 | 中国石油天然气股份有限公司 | Horizontal well target design method based on isochronic plane deduction |
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| 刘海锋等: "低渗透层碳酸盐岩气藏水平井开发地质关键技术", 《天然气地球科学》 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113221219A (en) * | 2021-05-08 | 2021-08-06 | 北京金阳普泰石油技术股份有限公司 | Construction method and system for adjacent well structure profile in horizontal well target design |
| CN113221219B (en) * | 2021-05-08 | 2023-09-01 | 北京金阳普泰石油技术股份有限公司 | Construction method and system of adjacent well construction section in horizontal well target design |
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