CN102913242A - Method of determining formation water resistivity of water flooded layer - Google Patents
Method of determining formation water resistivity of water flooded layer Download PDFInfo
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- CN102913242A CN102913242A CN 201210419942 CN201210419942A CN102913242A CN 102913242 A CN102913242 A CN 102913242A CN 201210419942 CN201210419942 CN 201210419942 CN 201210419942 A CN201210419942 A CN 201210419942A CN 102913242 A CN102913242 A CN 102913242A
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Abstract
The invention provides a method for determining the formation water resistivity of a water flooded layer and relates to a method for taking a fluid sample or test liquid from a borehole or a well. The method comprises the following steps: firstly analyzing logging response characteristics of the water flooded layer and qualitatively determining a water flooded grade; and secondly, selecting the mixed formation water resistivity according to the qualitative water flooded grade. The method can determine the formation water resistivity of the water flooded layer by adopting a two-step method, has a certain effect in the practical use of an oil field and is proved to have the effectiveness.
Description
Technical field
The present invention relates to a kind of method of in boring or well, getting fluid sample or test liquid.
Background technology
Determining at present take the Ariche formula as the saturation computation on basis and the important parameter of formation evaluation of water logging reservoir formation water resistance rate.Many documents utilize the natural potential data to carry out the method that formation water resistivity calculates.
In theory, because nutural potential logging is relatively more responsive to the characteristic of formation water, therefore, utilize nutural potential logging to ask formation water resistivity to become the emphasis of people's research.Yet a large amount of facts have proved.Because the influence factor of natural potential is a lot, such as country rock, shale, mud, temperature, pressure and oiliness etc. all can make natural potential generation deviation, particularly at the water logging reservoir, situation is more complicated, causes the method can not accurately obtain formation water resistance jail value.Wang Jingnong adopts experimental technique, has studied definite method of resistivity of mixed, has proposed a mixed liquor electrical conductivity theoretical expression; Zou Changchun etc. have proposed a kind of Innovative method for the problem that the method exists, and these methods do not take into full account the continuous variation of the complexity of water drive process and injected water, formation water, therefore are restricted when practical application.
Summary of the invention
The present invention aims to provide a kind of definite method with Water Flooding Layer formation water resistivity of good result.
The present invention determines the Water Flooding Layer formation water resistivity by two step method, and it has certain effect in the practical application in oil field, proves that method of the present invention has validity.
The specific embodiment
Embodiment one.
Use two step method to determine to mix formation water resistivity.At first analyze the logging in water flooded layer response characteristic, qualitative definite water flooded grade.According to the actual conditions in research work area, qualitative discrimination considers that mainly SP needle position misalignment amount, resistivity vertically change and resistivity reduction.Secondly, select to mix formation water resistivity according to qualitative water flooded grade.The method that mixing formation water resistivity in the different water flooded grade situations in work area mainly adopts water analysis data, sealing core data and MDT test data to combine obtains the mixing formation water resistivity value (seeing the following form) under the different water flooded grades.
。
(1) the water logging reservoir does not show as the SP baseline and is not offset, and positive rhythm reservoir resistivity tracing pattern is bell, and resistivity reduction is less than 5%, according to the water analysis data, determines that formation water resistivity gets 0.37 Ω * m.
(2) generally not skew of the SP baseline of low water logging reservoir, positive rhythm reservoir resistivity tracing pattern is bell shape-column shape, and resistivity reduction is between 5%～15%, and formation water resistivity is got 0.42 Ω * m.
(3) the SP baseline of high water logging reservoir generally is offset in, and its side-play amount is less than 10 mV, and positive rhythm reservoir resistivity tracing pattern is cylindricality, and resistivity reduction is between 15%～30%, and formation water resistivity is got 0.6n * m.
(4) the SP baseline of high water logging reservoir generally is offset, and its side-play amount is greater than 10 mV, and positive rhythm reservoir resistivity tracing pattern is infundibulate, and resistivity reduction is greater than 30%, and formation water resistivity is got 0.9～1.30 Ω * m.
Various features role in the differentiation of water out behavior is different, vertically changes according to SP needle position misalignment amount, resistivity when principium identification and the order of change in resistance rate is carried out.When several features are contradictory, be characterized as the master with the 1st; When the 1st feature is not obvious, consider successively the 2nd, the 3rd feature.
Embodiment two.
Get certain oil field a bite sealed coring well, this well coring data is analyzed at 5～No. 6 floor low-middle water logging is occured.From Logging data analysis. the alternatively foundation of layer water resistance rate of 2 phenomenons is arranged, the one, the needle position misalignment of 7 mV has appearred in natural potential; The 2nd, cylindricality appears in resistivity curve, and therefore selecting formation water resistivity is 0.6 Ω * m.From the well log interpretation achievement, result is consistent with the analysis of coring, and proves from the side the correctness that formation water resistivity is selected.
According to this method, the 83 mouthfuls of wells in this oil field are adjusted well carried out data processing and Water Flooding Layer explanation, meet 67 mouthfuls, coincidence rate is 80.7%, and correctness and the practicality of embodiment one method also is described.
Claims (3)
1. definite method of Water Flooding Layer formation water resistivity is characterized in that at first analyzing the logging in water flooded layer response characteristic, qualitative definite water flooded grade; Secondly, select to mix formation water resistivity according to qualitative water flooded grade.
2. definite method of Water Flooding Layer formation water resistivity as claimed in claim 1, it is characterized in that water flooded grade qualitative be vertically to change and resistivity reduction is determined according to SP needle position misalignment amount, resistivity.
3. definite method of Water Flooding Layer formation water resistivity as claimed in claim 1 or 2 is characterized in that formation water resistivity is to determine according to water analysis data, sealing core data and MDT test data.
Priority Applications (1)
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| CN 201210419942 CN102913242A (en) | 2012-10-29 | 2012-10-29 | Method of determining formation water resistivity of water flooded layer |
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| CN 201210419942 CN102913242A (en) | 2012-10-29 | 2012-10-29 | Method of determining formation water resistivity of water flooded layer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806231A (en) * | 2014-01-27 | 2015-07-29 | 中国石油化工股份有限公司 | Quantitative evaluation method of heavy oil steam stimulation water flooded layer |
| CN105201491A (en) * | 2015-09-02 | 2015-12-30 | 中国石油天然气股份有限公司 | Method and device for determining flooding intensity |
| CN112983411A (en) * | 2021-03-09 | 2021-06-18 | 中国石油大学(华东) | Method for estimating mixed liquor resistivity by using inspection well data |
-
2012
- 2012-10-29 CN CN 201210419942 patent/CN102913242A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806231A (en) * | 2014-01-27 | 2015-07-29 | 中国石油化工股份有限公司 | Quantitative evaluation method of heavy oil steam stimulation water flooded layer |
| CN104806231B (en) * | 2014-01-27 | 2017-07-07 | 中国石油化工股份有限公司 | The method for quantitatively evaluating of thickened oil steam-stimulated Water Flooding Layer |
| CN105201491A (en) * | 2015-09-02 | 2015-12-30 | 中国石油天然气股份有限公司 | Method and device for determining flooding intensity |
| CN105201491B (en) * | 2015-09-02 | 2019-02-15 | 中国石油天然气股份有限公司 | A kind of method and device of determining water logging intensity |
| CN112983411A (en) * | 2021-03-09 | 2021-06-18 | 中国石油大学(华东) | Method for estimating mixed liquor resistivity by using inspection well data |
| CN112983411B (en) * | 2021-03-09 | 2021-11-26 | 中国石油大学(华东) | Method for estimating mixed liquor resistivity by using inspection well data |
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Application publication date: 20130206 |