CN107977480A - A kind of shale gas reservoir aerogenesis fast appraisement method - Google Patents
A kind of shale gas reservoir aerogenesis fast appraisement method Download PDFInfo
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Abstract
The present invention relates to a kind of shale gas reservoir aerogenesis fast appraisement method, obtains the well logging of work area well shale gas reservoir to be evaluated and other geologic informations；Determine well shale interval to be evaluated；Shale gas reservoir aerogenesis evaluating, which is established, according to the well logging of work area reality drilling well and other geologic informations assigns minute mark standard, divide shale aerogenesis factor of influence GPF, the evaluating reservoir index LEI of criterion calculation to assign as X, Y-axis, draw GPF LEI evaluation plates, on evaluation plate, classification annotation is carried out to shale gas reservoir aerogenesis with distinct symbols；The fixed work area reservoir aerogenesis criteria for classifying is plotted on evaluation plate, the shale aerogenesis factor of influence GPF and evaluating reservoir index LEI values cultellation of well shale interval to be evaluated judge that well shale interval to be evaluated corresponds to reservoir aerogenesis classification to evaluating on plate from data point region；Export evaluation result.The method of the present invention is easy, is applied in Fuling Prefecture, and evaluation result is consistent with reality.
Description
Technical field
The present invention relates to shale gas evaluating reservoir field, and in particular to a kind of shale gas reservoir aerogenesis Fast Evaluation side
Method.
Background technology
Shale gas horizontal well development is a world-class technical barrier.Success and domestic Fu with U.S.'s shale gas revolution
The commercial development in mound shale gas field, shale gas technical research are paid close attention to be subject to lot of domestic and foreign scholar.
Fuling shale gas exploration and development practice confirms that shale gas reservoir aerogenesis is to determine shale gas well deliverability height
Basic factor.Shale gas horizontal well walks that ratio is bigger, and shale gas horizontal productivity is higher in high-quality shale interval.On the contrary, page
Rock air water horizontal well is difficult to obtain high yield.Therefore, aerogenesis that is quick, efficient, accurately identifying and evaluate shale gas reservoir, to instructing
Shale gas horizontal well drilling, horizontal well reservoir reconstruction and Efficient Development shale gas have important value.
The present invention provides a kind of shale gas reservoir aerogenesis fast appraisement method, including：Gather shale gas Reservoir Section
Well-log information, log data；Shale gas Reservoir Section lithology, compensation density are determined according to the well-log information, log data
DEN, total content of organic carbon TOC, effecive porosity POR, compensated neutron CNL, shale content Vsh, brittle mineral content, remove uranium gal
Horse standard deviation, hydrocarbon coefficient of correlation Kc, reservoir pressure coefficient, reservoir buried depth；According to prestore shale gas well data, gas
Hide production capacity and determine compensation density DEN, total content of organic carbon TOC, effecive porosity POR, compensated neutron CNL, shale content respectively
Vsh, brittle mineral content, remove uranium gamma standard deviation, hydrocarbon coefficient of correlation Kc, reservoir pressure coefficient, the tax minute mark of reservoir buried depth
It is accurate；Shale aerogenesis factor of influence GPF and evaluating reservoir index LEI are accurately determined according to the tax minute mark；According to the shale
Aerogenesis factor of influence GPF and evaluating reservoir index LEI forms the aerogenesis of plate evaluation shale gas reservoir.
The content of the invention
The purpose of the present invention is for the above-mentioned state of the art, it is desirable to provide a kind of application is easy, adaptable, can meet
A kind of shale gas reservoir aerogenesis fast appraisement method that domestic shale gas exploration and development needs.
The implementation of the object of the invention is that a kind of shale gas reservoir aerogenesis fast appraisement method, comprises the following steps that：
1) obtain work area shale gas reservoir to be evaluated well logging, well logging and other geologic informations, the data for well logging and
The shale of well logging explains well section, lithology, compensation density DEN, total content of organic carbon TOC, effecive porosity POR, compensated neutron
CNL, shale content Vsh, brittle mineral content, go uranium gamma standard deviation, hydrocarbon coefficient of correlation Kc, reservoir pressure coefficient and reservoir to bury
Hide depth；
2) well shale interval to be evaluated is determined
(1) when logging well consistent with the division of well logging reservoir well section, well log interpretation well section is directly selected as shale interval；
(2) when well logging and inconsistent well logging reservoir well section division, selection lithology is shale, hydrocarbon coefficient of correlation Kc >=3
Well section is as shale gas reservoir interval；
3) judge whether that having established work area shale gas reservoir aerogenesis evaluating assigns minute mark standard
(1) minute mark standard, and the stronger work area of practicality are assigned to having established shale gas reservoir aerogenesis evaluating, directly
Tap into next step；Draw shale gas evaluating reservoir plate；
(2) work area assigned the accurate or existing standard of minute mark to not setting up shale gas reservoir aerogenesis evaluating and do not applied to, needs
The tax of shale gas reservoir aerogenesis evaluating is established according to the well logging of work area drilling well, well logging and other geologic information data
Minute mark is accurate, enters back into next step；
4) GPF-LEI shale gas reservoirs aerogenesis evaluation plate is drawn
(1) it is X-axis to select shale aerogenesis factor of influence GPF, and evaluating reservoir index LEI is Y-axis, forms GPF-LEI evaluations
Plate；
(2) shale gas reservoir aerogenesis category division is carried out：To different classes of shale gas reservoir data point region into
Row region division；
(3) shale gas reservoir aerogenesis classification annotation is carried out；On GPF-LEI evaluation plates, with distinct symbols to difference
Reservoir aerogenesis classification is labeled；
(4) by the aerogenesis factor of influence GPF of work area well shale interval to be evaluated, the score value cultellation of evaluating reservoir index LEI
On the GPF-LEI evaluation plates drawn to step 4) (1)；
(5) on GPF-LEI evaluation plates, by the data point symbolically of well to be evaluated；
5) on GPF-LEI plates that step 4) (1) is drawn, the data point region of well shale interval to be evaluated is shown
The classification shown then evaluates classification for the reservoir aerogenesis of well to be evaluated, thus evaluates shale gas reservoir aerogenesis；
6) evaluation result is exported
Require to provide well shale interval evaluation result according to user, evaluation result content includes shale gas reservoir interval, page
Rock aerogenesis factor of influence GPF, evaluating reservoir index LEI and shale gas reservoir aerogenesis classification.
The method of the present invention is easy, applies more than 130 mouth wells, Guidance Levels well geosteering 10 in Fuling shale gas area
Mouthful, pressure break is segmented more than 100 mouth wells, and individual well open-flow capacity is in 200,000 sides/more than day, and highest individual well open-flow capacity is more than 1,000,000
Side/day, individual well produce shale gas daily more than 50,000 sides, and evaluation result is consistent with reality, meet survey well logging shale gas and finely solve
Release evaluation and Engineering Service needs.The present invention has good application value, can be domestic other shale gas exploratory areas reservoir
Evaluation provides technical support, can meet domestic shale gas Efficient Development needs.
Brief description of the drawings
Fig. 1 is workflow block diagram of the present invention；
Fig. 2 evaluates plate style for shale gas reservoir aerogenesis.
Embodiment
The present invention is described in detail with reference to the accompanying drawings.
With reference to Fig. 1, the present invention is used in shale gas reservoir aerogenesis Fast Evaluation, comprised the following steps that：
1) obtain work area shale gas reservoir to be evaluated well logging, well logging and other geologic informations, the data for well logging and
The shale of well logging explains well section, lithology, compensation density DEN, total content of organic carbon TOC, effecive porosity POR, compensated neutron
CNL, shale content Vsh, brittle mineral content, go uranium gamma standard deviation, hydrocarbon coefficient of correlation Kc, reservoir pressure coefficient and reservoir to bury
Hide depth；
Wherein：Parameter compensation density DEN, the compensated neutron CNL of well to be evaluated select the arithmetic average of log measurement result
Value；Uranium gamma standard deviation is gone to select log measurement to go uranium gamma data to calculate standard deviation；Shale content VshWell logging is selected to calculate knot
Fruit；Brittle mineral content, reservoir pressure coefficient, reservoir buried depth, hydrocarbon coefficient of correlation Kc select well logging measurement or result of calculation；
Total content of organic carbon TOC, effecive porosity POR select log measurement or result of calculation.
2) well shale interval to be evaluated is determined
(1) when logging well consistent with the division of well logging reservoir well section, well log interpretation well section is directly selected as shale interval；
(2) when well logging and inconsistent well logging reservoir well section division, selection lithology is shale, the well of hydrocarbon coefficient of correlation >=3
Duan Zuowei shale gas reservoir intervals；
Well logging and well logging single hop reservoir division length are less than 100m；One group of data of every section of selection.
3) judge whether that having established work area shale gas reservoir aerogenesis evaluating assigns minute mark standard
(1) minute mark standard, and the stronger work area of practicality are assigned to having established shale gas reservoir aerogenesis evaluating, directly
Tap into next step；Draw shale gas evaluating reservoir plate.
(2) work area assigned the accurate or existing standard of minute mark to not setting up shale gas reservoir aerogenesis evaluating and do not applied to, needs
The tax of shale gas reservoir aerogenesis evaluating is established according to the well logging of work area drilling well, well logging and other geologic information data
Minute mark is accurate, enters back into next step.
4) shale gas evaluating reservoir plate is drawn
(1) shale aerogenesis factor of influence GPF score values, evaluating reservoir index LEI score values are determined；
Aerogenesis factor of influence GPF is to assign minute mark standard according to reservoir aerogenesis evaluating to be assigned to uranium gamma standard respectively
Difference, hydrocarbon coefficient of correlation Kc, reservoir pressure coefficient, reservoir buried depth score value；Parameter respective weights have shale by each work area
Gas reservoir segmentation oil testing result determines that choose the sum of products of each parameter score value and weighted value influences for aerogenesis with dependence on parameter
Factor GPF score values.
The parameter respective weights refer to significance level of the parameter to aerogenesis factor of influence GPF.
Each parameters of shale gas aerogenesis factor of influence GPF assign minute mark standard and are shown in Table 1,
Table 1
Evaluating reservoir index LEI is to assign minute mark standard according to reservoir aerogenesis evaluating to be assigned to compensation density DEN, total respectively
Organic carbon content TOC, effecive porosity POR, compensated neutron CNL, shale content Vsh, brittle mineral content score value, choose each ginseng
The arithmetic mean of instantaneous value of number score value is evaluating reservoir index LEI score values.
Each parameters of shale gas evaluating reservoir index LEI assign minute mark standard and are shown in Table 2,
Table 2
It is X-axis to select shale aerogenesis factor of influence GPF, and evaluating reservoir index LEI is Y-axis, draws GPF-LEI evaluation figures
Version.
GPF, LEI dimensionless, reference axis scale retain 2 decimals；Shale gas evaluating reservoir data point should be no less than 3 mouthfuls
Well, 30 shale section evaluation sample informations.
(2) shale gas reservoir aerogenesis category division is carried out：To different classes of shale gas reservoir data point region into
Row region division.
The shale gas reservoir aerogenesis category division principle：I class is high-quality shale gas reservoir, this section of pressure break gas testing is expected to
Obtain of a relatively high industrial gas；II class is medium shale gas reservoir, this section of pressure break gas testing is expected to obtain moderate-yield；III class
For low shale gas reservoir, this section of pressure break gas testing can obtain low yield；IV class is non-effective shale gas reservoir, and the interval is basic
Without production capacity.
GPF-the LEI evaluates plate reservoir aerogenesis criteria for classification：Shale aerogenesis factor of influence GPF and evaluating reservoir
The region that index LEI is all higher than 0.75 is I class region of shale gas reservoir aerogenesis；Shale aerogenesis factor of influence GPF is commented with reservoir
It is II class region of shale gas reservoir aerogenesis that valency index LEI, which is all higher than removing I class region in 0.50 region,；Shale aerogenesis influences
Region I, the II class region of removing that factor GPF and evaluating reservoir index LEI is all higher than 0.25 is III class of shale gas reservoir aerogenesis
Region；Regions of the shale aerogenesis factor of influence GPF or evaluating reservoir index LEI less than 0.25 is IV class of shale gas reservoir aerogenesis
Non-active area.
(3) shale gas reservoir aerogenesis classification annotation is carried out；On GPF-LEI evaluation plates, with distinct symbols to difference
Reservoir aerogenesis classification is labeled.
With reference to Fig. 2, on GPF-LEI evaluation plates, the data sample point of I class shale gas reservoir is represented with "●", II class
The data sample point of shale gas reservoir represents that the data sample point of III class shale gas reservoir is represented with " ◆ ", non-effective with " ▲ "
The data sample point of shale gas reservoir is represented with " ".
(4) by the aerogenesis factor of influence GPF of work area well shale interval to be evaluated, the score value cultellation of evaluating reservoir index LEI
On the GPF-LEI evaluation plates drawn to step 4) (1).
(5) on GPF-LEI evaluation plates, the data point of well to be evaluated is represented with symbol "+".
5) on GPF-LEI plates that step 4) (1) is drawn, the data point region of well shale interval to be evaluated is shown
The classification shown then evaluates classification for the reservoir aerogenesis of well to be evaluated, thus evaluates shale gas reservoir aerogenesis.
The data point of well shale interval to be evaluated falls in I class area, then it represents that the well section shale gas reservoir aerogenesis to be evaluated
For I class, this section is expected to obtain of a relatively high industrial gas.
The data point of well shale interval to be evaluated falls in II class area, then it represents that the well section shale gas reservoir aerogenesis to be evaluated
For II class, which is expected to obtain moderate-yield industrial gas.
The data point of well shale interval to be evaluated falls in III class area, then it represents that the well section shale gas reservoir aerogenesis to be evaluated
For III class, which is expected to obtain low yield industrial gas.
The data point of well shale interval to be evaluated falls to fall in IV class region in data point, then it represents that the well section shale to be evaluated
Gas reservoir is non-effective shale gas reservoir, which can not obtain industrial gas.
6) evaluation result is exported
Require to provide evaluation well shale interval evaluation result according to user.Evaluation result includes shale gas reservoir interval, page
Rock aerogenesis factor of influence GPF, evaluating reservoir index LEI, shale gas reservoir aerogenesis classification；
Burnt page 108-6HF wells shale gas reservoir amounts to 18 sections, and shale gas reservoir aerogenesis is evaluated according to the present invention,
Wherein II class region amounts to 13 sections, is expected to obtain moderate-yield industrial gas；III class region amounts to 5 sections, is expected to obtain low yield work
Industry air-flow.18.59 ten thousand sides of actual well individual well test open-flow capacity/day, it is consistent with the evaluation of the present invention.As it can be seen that energy of the present invention
Meet to survey the evaluation of well logging shale gas Fine structural interpretation and Engineering Service needs, there is good application value.
The method of the present invention is easy, applies more than 130 mouth wells, Guidance Levels well geosteering 10 in Fuling shale gas area
Mouthful, pressure break is segmented more than 100 mouth wells, and individual well open-flow capacity is in 200,000 sides/more than day, and highest individual well open-flow capacity is more than 1,000,000
Side/day, individual well produce shale gas daily more than 50,000 sides, can provide technical support for domestic other shale gas exploratory areas evaluating reservoir,
Meet domestic shale gas Efficient Development needs.
Claims (8)
- A kind of 1. shale gas reservoir aerogenesis fast appraisement method, it is characterised in that：Comprise the following steps that：1) well logging, well logging and the other geologic informations of work area shale gas reservoir to be evaluated are obtained, the data is well logging and well logging Shale explain well section, lithology, compensation density DEN, total content of organic carbon TOC, effecive porosity POR, compensated neutron CNL, mud Matter content Vsh, brittle mineral content, go uranium gamma standard deviation, hydrocarbon coefficient of correlation Kc, reservoir pressure coefficient and reservoir buried depth；2) well shale interval to be evaluated is determined(1) when logging well consistent with the division of well logging reservoir well section, well log interpretation well section is directly selected as shale interval；(2) when well logging and inconsistent well logging reservoir well section division, selection lithology is shale, the well section of hydrocarbon coefficient of correlation Kc >=3 As shale gas reservoir interval；3) judge whether that having established work area shale gas reservoir aerogenesis evaluating assigns minute mark standard(1) to having established shale gas reservoir aerogenesis evaluating, to assign minute mark accurate, and the stronger work area of practicality, directly into Enter in next step；Draw shale gas evaluating reservoir plate；(2) to do not set up shale gas reservoir aerogenesis evaluating assign work area that the accurate or existing standard of minute mark do not applied to, it is necessary to according to Shale gas reservoir aerogenesis evaluating, which is established, according to the well logging of work area drilling well, well logging and other geologic information data assigns minute mark Standard, enters back into next step；4) GPF-LEI shale gas reservoirs aerogenesis evaluation plate is drawn(1) it is X-axis to select shale aerogenesis factor of influence GPF, and evaluating reservoir index LEI is Y-axis, forms GPF-LEI evaluation figures Version；(2) shale gas reservoir aerogenesis category division is carried out：To different classes of shale gas reservoir data point region carry out area Domain divides；(3) shale gas reservoir aerogenesis classification annotation is carried out；On GPF-LEI evaluation plates, with distinct symbols to different reservoir Aerogenesis classification is labeled；(4) by the aerogenesis factor of influence GPF of work area well shale interval to be evaluated, evaluating reservoir index LEI score value cultellation to step On GPF-LEI evaluation plates that rapid 4) (1) is drawn；(5) on GPF-LEI evaluation plates, by the data point symbolically of well to be evaluated；5) on GPF-LEI plates that step 4) (1) is drawn, what the data point region of well shale interval to be evaluated was shown Classification then evaluates classification for the reservoir aerogenesis of well to be evaluated, thus evaluates shale gas reservoir aerogenesis；6) evaluation result is exportedRequire to provide well shale interval evaluation result according to user, evaluation result content includes shale gas reservoir interval, shale produces Gas factor of influence GPF, evaluating reservoir index LEI and shale gas reservoir aerogenesis classification.
- A kind of 2. shale gas reservoir aerogenesis fast appraisement method according to claim 1, it is characterised in that：Step 1) In, parameter compensation density DEN, the compensated neutron CNL of well to be evaluated select the arithmetic mean of instantaneous value of log measurement result；Go uranium gamma Standard deviation selects log measurement to go uranium gamma data to calculate standard deviation；Shale content VshSelect well logging result of calculation；Brittle mineral Content, reservoir pressure coefficient, reservoir buried depth, hydrocarbon coefficient of correlation Kc select well logging measurement or result of calculation.
- A kind of 3. shale gas reservoir aerogenesis fast appraisement method according to claim 1, it is characterised in that：Step 1) In, total content of organic carbon TOC, effecive porosity POR select log measurement or result of calculation.
- A kind of 4. shale gas reservoir aerogenesis fast appraisement method according to claim 1, it is characterised in that：Step 2) In, well logging and well logging single hop reservoir division length are less than 100m；One group of data of every section of selection.
- A kind of 5. shale gas reservoir aerogenesis fast appraisement method according to claim 1, it is characterised in that：Step 4) (1) in, aerogenesis factor of influence GPF be according to reservoir aerogenesis evaluating assign minute mark standard be assigned to respectively uranium gamma standard deviation, Hydrocarbon coefficient of correlation Kc, reservoir pressure coefficient, reservoir buried depth score value；Parameter respective weights have shale gas storage by each work area Layer segmentation oil testing result determines that the sum of products for choosing each parameter score value and weighted value is aerogenesis factor of influence with dependence on parameter GPF score values；The parameter respective weights refer to significance level of the parameter to aerogenesis factor of influence GPF.
- A kind of 6. shale gas reservoir aerogenesis fast appraisement method according to claim 1, it is characterised in that：Step 4) (1) in the GPF-LEI evaluation plates drawn, GPF, LEI dimensionless, reference axis scale retain 2 decimals；Shale gas reservoir is commented Valence mumber strong point should be no less than 3 mouthfuls of wells, 30 shale section evaluation sample informations.
- A kind of 7. shale gas reservoir aerogenesis fast appraisement method described in claim 1, it is characterised in that：In step 4) (2), The shale gas reservoir aerogenesis category division principle：I class is high-quality shale gas reservoir, this section of pressure break gas testing is expected to obtain opposite Higher industrial gas；II class is medium shale gas reservoir, this section of pressure break gas testing is expected to obtain moderate-yield；III class is low page Rock gas reservoir, this section of pressure break gas testing can obtain low yield；IV class is non-effective shale gas reservoir, and the interval is substantially without production capacity.
- A kind of 8. shale gas reservoir aerogenesis fast appraisement method according to claim 1, it is characterised in that：Step 4) (2) in, GPF-LEI evaluation plate reservoir aerogenesis criteria for classifications：Shale aerogenesis factor of influence GPF and evaluating reservoir index LEI The region for being all higher than 0.75 is I class region of shale gas reservoir aerogenesis；Shale aerogenesis factor of influence GPF and evaluating reservoir index It is II class region of shale gas reservoir aerogenesis that LEI, which is all higher than removing I class region in 0.50 region,；Shale aerogenesis factor of influence Region I, the II class region of removing that GPF and evaluating reservoir index LEI is all higher than 0.25 is III class region of shale gas reservoir aerogenesis； Regions of the shale aerogenesis factor of influence GPF or evaluating reservoir index LEI less than 0.25 has for shale gas reservoir IV class of aerogenesis is non- Imitate region.
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| CN109991123A (en) * | 2019-03-28 | 2019-07-09 | 中国石油化工股份有限公司 | The Geochemical Assessment method of shale oil resource mobility |
| CN110685676A (en) * | 2018-06-19 | 2020-01-14 | 中国石油化工股份有限公司 | Method for quantitatively identifying high-quality shale sections |
| CN112529385A (en) * | 2020-12-04 | 2021-03-19 | 中国地质大学（北京） | Shale gas resource evaluation method and related device |
| CN112855126A (en) * | 2019-11-27 | 2021-05-28 | 中国石油天然气股份有限公司 | Shale gas reservoir classification method and device and storage medium |
| CN113622903A (en) * | 2020-04-21 | 2021-11-09 | 中国石油天然气股份有限公司 | Reservoir transformation method and device |
| CN113719278A (en) * | 2020-09-22 | 2021-11-30 | 中国石油天然气集团有限公司 | Oil reservoir identification method, device, equipment and medium |
| CN113767210A (en) * | 2019-04-01 | 2021-12-07 | 贝克休斯油田作业有限责任公司 | Real-time productivity assessment of sidetracking wells for construction decisions |
| CN117216669A (en) * | 2023-11-09 | 2023-12-12 | 中国地质大学（北京） | Shale reservoir classification evaluation chart establishing method and application |
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