CN103912268B - Shale reservoir gas-bearing saturation based on TOC determines method - Google Patents
Shale reservoir gas-bearing saturation based on TOC determines method Download PDFInfo
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Abstract
The present invention relates to a kind of shale reservoir gas-bearing saturation based on TOC and determine method, measured by fixed logging instrument or well-log information is calculated TOC data；Divide shale gas according to when formation lithology, gas survey methane, brill show reservoir with well logging natural gamma, density curve change, read shale reservoir TOC curve data, choose non-reservoir TOC meansigma methods adjacent in being in same shale section, TOC background value as this shale reservoir, according to classifying and selecting region shale reservoir gas-bearing saturation exponent from different places, according to formula S g=1 (TOCt/TOCb)‑1/n, ask for gas saturation Sg of shale Reservoir Section, export result of calculation.The present invention solves low-resistance shale reservoir and calculates the problem of formation gas bearing saturation, low cost, and easy, accurate, subject range is wider.The present invention has applied 26 mouthfuls of wells in shale gas field, Fuling, and wherein 23 mouthfuls of wells of interpretation process low-resistance shale gas reservoir use, and determine accurately.
Description
Technical field
The present invention relates to determine shale reservoir gas-bearing saturation intent, for shale during well logging with well log interpretation
Evaluating reservoir provides explains that key parameter is with the method determining TOC shale reservoir gas-bearing saturation.
Background technology
At shale gas exploration and development well logging with well logging service process, traditional shale gas reservoir gas-bearing saturation is true
The method of determining is to use A Erqifa to ask for.
A Erqifa asks for shale reservoir gas-bearing saturation, mainly uses well logging shale reservoir resistivity, hole
Degree, regional stratum water resistance rate data, utilize Archie formula to ask for.The shale etc. asked for based on A Erqifa
Reservoir gas-bearing saturation is referred to as " resistivity gas saturation ".
A Erqifa asks for shale reservoir gas-bearing saturation precondition, only formation water conduction, constitutes stratum
The mineralogical composition of skeleton is non-conductive, but in shale reservoir conductive mineral pyrite and stratum bound water content be relatively
Height, causes shale reservoir resistivity extremely to diminish, and calculated shale reservoir resistivity gas saturation is accurate
Spend relatively low, poor reliability.
Summary of the invention
It is an object of the invention to for the above-mentioned state of the art, it is desirable to provide one can be that shale gas reservoir gas-bearing is saturated
Degree provides reliable data, improves and is determined for compliance with rate, particularly improves the shale reservoir under the conditions of low-resistivity saturated
Degree determines that the shale reservoir gas-bearing saturation based on TOC of reliability determines method.
The implementation of the object of the invention is, shale reservoir gas-bearing saturation based on TOC determines method, specifically
Step is:
1) measured by fixed logging instrument or well-log information is calculated TOC data；
2) well logging TOC curve data record step-length is 1 point/m～1 point/0.1m, well logging TOC profile note
Record step-length is 2 points/m～1 point/0.1m；
3) according to formation lithology, gas survey methane, bore time and well logging natural gamma, density curve change divide page
Rock gas display reservoir；
4) shale reservoir TOC curve data is read, with TOCt(%) represent；
5) choose be in same shale section in adjacent non-reservoir TOC meansigma methods, as the TOC of this shale reservoir
Background value, with TOCb(%) represent；
When TOCt takes logging data, TOCb takes the well logging background data of correspondence, when TOCt takes log data, TOCb
Take the well logging background data of correspondence；
6) according to classifying and selecting region shale reservoir gas-bearing saturation exponent from different places, scope is 2～3；
7) according to formula S g=1-(TOCt/TOCb)-1/n, ask for gas saturation Sg of shale Reservoir Section, with little
Number or percent represent, the shale reservoir gas-bearing saturation asked for based on TOC is referred to as TOC gas saturation；
8) output result of calculation.
The present invention solves low-resistance shale reservoir and calculates the problem of formation gas bearing saturation, low cost, relatively A Erqi
Method determines that shale reservoir gas-bearing saturation is easier, accurate, and subject range is wider.
The present invention is at Middle Yangtze region gas field in Jiannan, 26 mouthfuls of wells of shale gas field, Fuling application, wherein at explanation
Reason 23 mouthfuls of wells of low-resistance shale gas reservoir, demonstrate the advantage of uniqueness in terms of low-resistance shale evaluating reservoir.
Accompanying drawing explanation
Fig. 1 is workflow block diagram of the present invention,
Fig. 2 is real work flow process detail drawing of the present invention.
Detailed description of the invention
With reference to Fig. 1,2, the present invention concretely comprises the following steps:
1) measured by fixed logging instrument or well-log information is calculated TOC data；
2) well logging TOC curve data record step-length is 1 point/m～1 point/0.1m, well logging TOC profile note
Record step-length is 2 points/m～1 point/0.1m；
3) according to formation lithology, gas survey methane, bore time and well logging natural gamma, density curve change divide page
Rock gas display reservoir.
Shale display reservoir lithology is shale or mud stone, and particle diameter is less than 0.004mm, and gas surveys methane content at base value
On the basis of increase by more than 1%, TOC be more than 0.5%, have low bore time, high natural gamma, low-density feature.
4) shale reservoir TOC curve data is read, with TOCt(%) represent；
5) choose be in same shale section in adjacent non-reservoir TOC meansigma methods, as the TOC of this shale reservoir
Background value, with TOCb(%) represent；
When TOCt takes logging data, TOCb takes the well logging background data of correspondence, when TOCt takes log data, TOCb
Take the well logging background data of correspondence；TOCt with TOCb mates according to well logging, well logging.
6) according to classifying and selecting region shale reservoir gas-bearing saturation exponent from different places, scope is 2～3；
Region shale gas gas saturation Index n Value determines method:
The minimum gas saturation of shale gas-bearing formation is defined as 0.5 or 50%, i.e. region shale gas-bearing formation well logging, survey
There is following relationship in well TOC minima TOCtmin and TOCb:
(TOCtmin/TOCb)-1/n=0.5, Kcmin=TOCtmin/TOCb；
N=Lg (TOCtmin/TOCb)/Lg2, n=LgKcmin/Lg2；
In formula: Kcmin is the TOC minimum ratio of shale gas-bearing formation.
7) according to formula S g=1-(TOCt/TOCb)-1/n, ask for gas saturation Sg of shale Reservoir Section, with little
Number or percent represent, the shale reservoir gas-bearing saturation asked for based on TOC is referred to as TOC gas saturation；
8) output result of calculation, evaluates reservoir property for user.Generally, the gassiness of shale gas-bearing formation is saturated
Degree Sg is not less than 0.5.
With specific embodiment in detail the present invention is described in detail below.
Example one: build gas field, field A well
1) TOC data are obtained by fixed logging instrument measurement；
2) well logging TOC curve data record step-length is 1 point/m；
3) Jurassic system Dongyue Temple section 610.0～645.0m well section, lithology is mainly shale.Total hydrocarbon, methane by
Base value 0% rises to 9.85%, according to total hydrocarbon in gas logging, bore time and well logging natural gamma, density curve etc. by this layer
Section is divided into shale reservoir, and element logging presentation does not contains conductive mineral pyrite.
4) reading 610.0～645.0m well section TOC data, value is between 1.0%～2.0%；
5) above 610.0m, 600.0～610.0m shale TOC are 0.1%～0.3%, average 0.2%, 610.0～
645.0m well section shale reservoir TOC background value TOCb takes 0.2%, i.e. TOCb=0.2%；
6) determine n value according to area experiment, build area, south Dongyue Temple section shale gas-bearing formation TOCtmin=0.8%,
TOCb=0.2%, n=Lg(TOCtmin/TOCb)/Lg2=Lg(0.8/0.2)/Lg2=2.0, saturation exponent
N takes 2.0；
7) according to formula S g=1-(TOCt/TOCb)-1/nCalculate by meter Jin Hang；
8) output result, 610.0～645.0m well sections, calculating gas saturation Sg is 55.0%～68.0%,
It is construed to two class gas-bearing formations.Gas saturation Sg utilizing A Erqifa to calculate is 50.0%～60.0%, is construed to
Two class gas-bearing formations, the two calculated gas saturation substantially close to, explanation results is consistent.
Completion pressure break gas testing, day producing natural gas 2100m3～3900m3.The gas saturation that the present invention calculates is described
It is consistent with stratum practical situation.
Example two, shale gas field, Fuling B well,
1) acquisition TOC data are calculated by well-log information；
2) well logging TOC profile record step-length is 1 point/0.1m；
3) the Silurian Longma small stream group bottom Ordovician system five peak group 2340.0-2415.0m well section, lithology is predominantly
Culm, total hydrocarbon, methane rises to 2.13% by base value 0.10%, according to total hydrocarbon in gas logging, bore time and well logging
This interval is divided into shale reservoir by natural gamma, density curve etc.；
4) reading 2340.0～2377.0m well section TOC data, value is 1.0%～2.0%, 2377.0～2415.0m
Well section TOC data, are worth 2.0%～4.6%, element logging presentation local pyrite Han conductive mineral, Huang Tie
Mineral content is 2.0%～5.0%；
5) above 2340.0m, 2330.0～2340.0m shale TOC are 0.1%～0.3%, average 0.2%,
2340.0～2415.0m well section shale reservoir TOC background values take 0.2%, i.e. TOCb=0.2%；
6) n value, the Ordovician system five peak, Silurian Longma small stream group bottom, Fuling Prefecture group are determined according to area experiment
Shale gas-bearing formation TOCtmin=0.8%, TOCb=0.2%, n=Lg(TOCtmin/TOCb)/Lg2=Lg(0.8/0.2)
/ Lg2=2.0, saturation exponent takes 2.0；
7) according to formula S g=1-(TOCt/TOCb)-1/nPointwise calculates；
8) output result, 2340.0～2377.0m well sections, calculating gas saturation Sg is 55.0%～68.0%,
Being construed to two class gas-bearing formations, utilizing A Erqifa to calculate gas saturation Sg is 10.0%～60.0%, Duo Shuo
Between 10.0%～35.0%, the gas saturation calculated according to A Erqifa can not be judged as gas-bearing formation；2377.0～
2415.0m well section, utilizing TOC material computation gas saturation Sg is 68.0%～79.0%, is construed to a class
Gas-bearing formation, utilizing A Erqifa to calculate gas saturation Sg is 10%～70%, most between 10.0%～35.0%；
The gas saturation that gas saturation based on TOC calculating calculates apparently higher than A Erqifa.
Sidetrack horizontal well, horizontal segment length 1008m, point 15 sections of pressure break gas testings, day producing natural gas 21.3 × 104m3。
Illustrate that the gas saturation that the present invention calculates is consistent with stratum practical situation, and contain at shale reservoir and lead
In the case of electricity mineral, there is obvious practical advantages.
Claims (4)
1. shale reservoir gas-bearing saturation based on TOC determines method, it is characterised in that concretely comprise the following steps:
1) measured by fixed logging instrument or well-log information is calculated TOC data；
2) well logging TOC curve data record step-length is 1 point/m～1 point/0.1m, well logging TOC profile note
Record step-length is 2 points/m～1 point/0.1m；
3) according to formation lithology, gas survey methane, bore time and well logging natural gamma, density curve change divide page
Rock gas display reservoir；
4) shale reservoir TOC curve data is read, with TOCt(%) represent；
5) choose be in same shale section in adjacent non-reservoir TOC meansigma methods, as the TOC of this shale reservoir
Background value, with TOCb(%) represent；
When TOCt takes logging data, TOCb takes the well logging background data of correspondence, when TOCt takes log data, TOCb
Take the well logging background data of correspondence；
6) according to classifying and selecting region shale reservoir gas-bearing saturation exponent from different places, scope is 2～3；
7) according to formula S g=1-(TOCt/TOCb)-1/n, ask for gas saturation Sg of shale Reservoir Section, with little
Number or percent represent, the shale reservoir gas-bearing saturation asked for based on TOC is referred to as TOC gas saturation；
8) output result of calculation.
Shale reservoir gas-bearing saturation based on TOC the most according to claim 1 determines method, and it is special
Levying and be that shale display reservoir lithology is shale or mud stone, particle diameter is less than 0.004mm, and gas surveys methane content at base
Increasing by more than 1% on the basis of value, TOC is more than 0.5%.
Shale reservoir gas-bearing saturation based on TOC the most according to claim 1 determines method, and it is special
Levy and be that the minimum gas saturation of shale gas-bearing formation is defined as 0.5 or 50%, i.e. region shale gas-bearing formation well logging,
There is following relationship in well logging TOC minima TOCtmin and TOCb:
(TOCtmin/TOCb)-1/n=0.5, Kcmin=TOCtmin/TOCb；
N=Lg (TOCtmin/TOCb)/Lg2, n=LgKcmin/Lg2；
In formula: Kcmin is the TOC minimum ratio of shale gas-bearing formation.
Shale reservoir gas-bearing saturation based on TOC the most according to claim 1 determines method, and it is special
Levy and be that gas saturation Sg of shale gas-bearing formation is not less than 0.5.
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| CN104790943B (en) * | 2014-07-31 | 2019-02-05 | 中国石油集团长城钻探工程有限公司 | Oil and gas reservoir oiliness and the calculating of porosity composite index and reservoir judgment method |
| CN104853822A (en) * | 2014-09-19 | 2015-08-19 | 杨顺伟 | Method for evaluating shale gas reservoir and searching sweet spot region |
| CN105350959B (en) * | 2015-11-06 | 2018-03-16 | 中石化石油工程技术服务有限公司 | The method that shale gas reservoir gas-bearing saturation degree is determined by WELL LITHOLOGY density |
| CN105370270B (en) * | 2015-11-06 | 2018-04-10 | 中石化石油工程技术服务有限公司 | The method that shale gas reservoir gas-bearing saturation degree is determined by the dipole sonic P-wave And S time difference |
| CN105445441B (en) * | 2015-12-03 | 2017-06-13 | 中国石油天然气股份有限公司 | Reservoir gas saturation determination method and device |
| CN106932836B (en) * | 2015-12-30 | 2019-07-12 | 中国石油化工股份有限公司 | It is a kind of for evaluating the method and system of shale gas gassiness abundance |
| CN108647417B (en) * | 2018-04-28 | 2022-11-01 | 中石化石油工程技术服务有限公司 | Simple method for determining gas saturation of shale gas reservoir |
| CN110656922B (en) * | 2018-06-28 | 2022-08-05 | 中国石油化工股份有限公司 | Shale isochronous stratum logging dividing method and system based on pencils and stone belt characteristics |
| CN109025961B (en) * | 2018-07-26 | 2020-03-06 | 中国石油化工股份有限公司江汉油田分公司勘探开发研究院 | Shale reservoir gas saturation calculation method and device and electronic equipment |
| CN112392472B (en) * | 2019-08-19 | 2022-08-02 | 中国石油天然气股份有限公司 | Method and device for determining integrated development mode of shale and adjacent oil layer |
| CN111984903B (en) * | 2020-01-06 | 2021-05-14 | 中国地质大学（北京） | Calculation characterization method and system for TOC (total organic carbon) and oil saturation of shale reservoir |
| CN111706319B (en) * | 2020-06-16 | 2023-05-16 | 中国石油大学(华东) | Sea shale gas saturation evaluation method based on gradual stripping of conductive influence factors |
| CN112065361B (en) * | 2020-09-16 | 2021-03-12 | 成都理工大学 | Method for determining gas saturation of tight reservoir based on sound wave attenuation |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101930082B (en) * | 2009-06-24 | 2013-05-01 | 中国石油集团川庆钻探工程有限公司 | Method for discriminating reservoir fluid type by using resistivity data |
| CN102312671B (en) * | 2011-09-16 | 2014-02-12 | 中国石油化工股份有限公司 | Method capable of fast explaining and evaluating reservoir fluid properties |
| US20130269933A1 (en) * | 2012-04-13 | 2013-10-17 | Schlumberger Technology Corporation | Method and apparatus to prepare drill cuttings for petrophysical analysis by infrared spectroscopy and gas sorption |
| CN102748004B (en) * | 2012-06-06 | 2015-08-05 | 中国石油化工股份有限公司 | The defining method of mud logging hydrocarbon saturation |
| CN102707333A (en) * | 2012-06-06 | 2012-10-03 | 陕西延长石油(集团)有限责任公司研究院 | Shale gas resource/reserve measurement method |
| CN103670388B (en) * | 2013-12-12 | 2016-04-06 | 中国石油天然气股份有限公司 | Method for evaluating organic carbon content of shale |
-
2014
- 2014-03-28 CN CN201410122338.4A patent/CN103912268B/en active Active
Non-Patent Citations (1)
| Title |
|---|
| 基于TOC的页岩储层含气饱和度确定方法及应用;任元等;《江汉石油职工大学学报》;20150131;第28卷(第1期);17-20 * |
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Effective date of registration: 20200716 Address after: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Co-patentee after: SINOPEC OILFIELD SERVICE Corp. Patentee after: SINOPEC Group Co-patentee after: SINOPEC JIANGHAN OILFIELD SERVICE Corp. Address before: 433123 No. 57, 235 Avenue, Guanghua office, Qianjiang, Hubei Patentee before: Logging company of Sinopec Jianghan Petroleum Engineering Co.,Ltd. |