CN102913238A - Method for dissolving initial oil saturation degree of oil-water layer - Google Patents
Method for dissolving initial oil saturation degree of oil-water layer Download PDFInfo
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- CN102913238A CN102913238A CN 201210420160 CN201210420160A CN102913238A CN 102913238 A CN102913238 A CN 102913238A CN 201210420160 CN201210420160 CN 201210420160 CN 201210420160 A CN201210420160 A CN 201210420160A CN 102913238 A CN102913238 A CN 102913238A
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Abstract
The invention relates to a method specially used for ground drilling or well drilling so as to obtain surface soil and liquid samples in a well. The method includes: firstly, respectively detecting effective porosity and deep lateral resistivity of a non-cored well oil layer; secondly, calculating initial oil saturation degree of the non-cored well oil layer; thirdly, calculating correcting value of the initial oil saturation degree of the oil-water layer; and fourthly, calculating the initial oil saturation degree of the oil-water layer. An initial oil saturation interpretation model of the oil layer is set on the basis of logging theory according to data of a closed cored well and is corrected by the phase permeability technology, accurate calculation of the initial oil saturation degree of the oil-water layer is realized, and a novel method for determining the complicated initial oil saturation degree of the oil-water layer is provided.
Description
Technical field
The present invention relates to a kind ofly be exclusively used in earth drilling or drilling well in order to obtain the method for liquor sample in table soil or the well.
Background technology
G oil field P oil reservoir area reaches 2 600 km
2, buried depth is grown a plurality of fault zones, depressed area and rumble strip in the work area between 1 000～2 100 m, and reservoir lithology is mainly feldspar rock-fragment sandstone and rock-fragment sandstone, shale, calcareously relatively grows, and belongs to the two structure-lithological pools that mainly are subjected to lithologic character controlling.The reservoir porosity distributed area is 6.3%～24.6%, average out to 15.8%; The Permeability Distribution interval is at 0.08～176.88 mD, and average out to 19.60 mD belong to mesopore degree, low-permeability clastic reservoir rock.Because a large amount of tomography cuttings have formed numerous horsts, graben and low relief structure in the work area, impel profit reallocation in the oil reservoir, cause the water distribution complexity that on the plane and vertically oils, each well is without unified oil-water interfaces, and oil-water common-layer is relatively grown.
Initial oil saturation is one of basic parameter of reserves parameter study.Determine during at present reserves calculate that the method for structure-lithological pool oil saturation parameter mainly contains 3 kinds: 1. using sealed coring well saturation analysis data and resistivity and degree of porosity, to set up empirical relation definite; 2. use and press Wal, mercury data south method to determine L63; 3. using rock physics experimental result south saturation ratio log interpretation model determines.For method 1., because this district's sealed coring well oil-water common-layer data is less, can't independently set up the oil saturation interpretation model.For method 2., owing to press the Wal method of mercury material computation saturation ratio to be only applicable to oil reservoir, and only can obtain the average oil saturation of oil reservoir, can't calculate the oil saturation of individual well individual layer and the oil saturation of oil-water common-layer.For method 3., owing to the physical property of this district's oil-water common-layer and oil reservoir, electrically be more or less the same, the oil-water common-layer oil saturation of calculating is higher, can not satisfy the evaluating reservoir demand.
Summary of the invention
The present invention aims to provide the accurately acquiring method of oil-water common-layer original saturation ratio of a kind of result of calculation.
The acquiring method of oil-water common-layer original saturation ratio of the present invention comprises.
⑴ detect respectively not effecive porosity and the deep lateral resistivity of core hole oil reservoir.
⑵ calculate the not original water saturation of core hole oil reservoir.
Log is the original water saturation of core hole oil reservoir=2.757-0.7678log effecive porosity-0. 1275 log deep lateral resistivity not.
⑶ calculate the original water saturation correcting value of oil-water common-layer.
The original water saturation correcting value of oil-water common-layer=-0.4800 is the original water saturation of core hole oil reservoir+28.25 not.
⑷ calculate the original water saturation of oil-water common-layer.
The original water saturation correcting value of the original water saturation+oil-water common-layer of core hole oil reservoir of the original water saturation of oil-water common-layer=not.
The present invention sets up the initial oil saturation interpretation model of oil reservoir take logging theory as the basis according to sealed coring well data.And adopt and to ooze mutually analytical technology the oil saturation model of oil reservoir is proofreaied and correct, realized the accurate calculating of the initial oil saturation of oil-water common-layer, for the initial oil saturation of determining complicated oil-water common-layer provides new method.
The specific embodiment
Embodiment one.
The acquiring method of oil-water common-layer original saturation ratio comprises.
⑴ detect respectively not effecive porosity and the deep lateral resistivity of core hole oil reservoir.
⑵ calculate the not original water saturation of core hole oil reservoir.
Log is the original water saturation of core hole oil reservoir=2.757-0.7678log effecive porosity-0. 1275 log deep lateral resistivity not.
⑶ calculate the original water saturation correcting value of oil-water common-layer.
The original water saturation correcting value of oil-water common-layer=-0.4800 is the original water saturation of core hole oil reservoir+28.25 not.
⑷ calculate the original water saturation of oil-water common-layer.
The original water saturation correcting value of the original water saturation+oil-water common-layer of core hole oil reservoir of the original water saturation of oil-water common-layer=not.
Embodiment two.
Use 1 mouthful of sealed coring well data, ask for the oil-water common-layer original saturation ratio with embodiment one described method first, with sealed coring well actual measurement oil-water common-layer original saturation ratio, two saturation ratios are contrasted, concrete outcome sees Table 1.By as seen from Table 1, it is 6.1% that Application Example one described method is calculated 2 mouthfuls of sealed coring well initial oil saturation average relative errors, satisfies the requirement of reserves standard.
Table 1
Claims (1)
1. the acquiring method of oil-water common-layer original saturation ratio is characterized in that comprising:
⑴ detect respectively not effecive porosity and the deep lateral resistivity of core hole oil reservoir;
⑵ calculate the not original water saturation of core hole oil reservoir:
Log is the original water saturation of core hole oil reservoir=2.757-0.7678log effecive porosity-0. 1275 log deep lateral resistivity not;
⑶ calculate the original water saturation correcting value of oil-water common-layer:
The original water saturation correcting value of oil-water common-layer=-0.4800 is the original water saturation of core hole oil reservoir+28.25 not;
⑷ calculate the original water saturation of oil-water common-layer:
The original water saturation correcting value of the original water saturation+oil-water common-layer of core hole oil reservoir of the original water saturation of oil-water common-layer=not.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201210420160 CN102913238A (en) | 2012-10-29 | 2012-10-29 | Method for dissolving initial oil saturation degree of oil-water layer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201210420160 CN102913238A (en) | 2012-10-29 | 2012-10-29 | Method for dissolving initial oil saturation degree of oil-water layer |
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| CN102913238A true CN102913238A (en) | 2013-02-06 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104847342A (en) * | 2015-04-28 | 2015-08-19 | 中国石油天然气股份有限公司 | Method for measuring initial oil saturation |
| CN105301220A (en) * | 2014-06-06 | 2016-02-03 | 中国石油化工股份有限公司 | Correction method for saturation of sealed coring analysis |
| CN105370270A (en) * | 2015-11-06 | 2016-03-02 | 中石化石油工程技术服务有限公司 | Method for determining gas saturation of shale gas reservoir by longitudinal-transverse wave time difference of dipole acoustic waves |
| CN106771071A (en) * | 2016-12-26 | 2017-05-31 | 中国石油天然气集团公司 | A kind of sealing core drilling saturation correction method mutually oozed based on profit |
| CN110578503A (en) * | 2019-09-20 | 2019-12-17 | 合肥鼎盛锦业科技有限公司 | Method and system for determining initial water saturation of oil reservoir in polymer flooding numerical well testing |
-
2012
- 2012-10-29 CN CN 201210420160 patent/CN102913238A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105301220A (en) * | 2014-06-06 | 2016-02-03 | 中国石油化工股份有限公司 | Correction method for saturation of sealed coring analysis |
| CN105301220B (en) * | 2014-06-06 | 2017-07-07 | 中国石油化工股份有限公司 | Sealing core drilling analyzes the bearing calibration of saturation degree |
| CN104847342A (en) * | 2015-04-28 | 2015-08-19 | 中国石油天然气股份有限公司 | Method for measuring initial oil saturation |
| CN105370270A (en) * | 2015-11-06 | 2016-03-02 | 中石化石油工程技术服务有限公司 | Method for determining gas saturation of shale gas reservoir by longitudinal-transverse wave time difference of dipole acoustic waves |
| CN106771071A (en) * | 2016-12-26 | 2017-05-31 | 中国石油天然气集团公司 | A kind of sealing core drilling saturation correction method mutually oozed based on profit |
| CN110578503A (en) * | 2019-09-20 | 2019-12-17 | 合肥鼎盛锦业科技有限公司 | Method and system for determining initial water saturation of oil reservoir in polymer flooding numerical well testing |
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Application publication date: 20130206 |