CN108343425A - Carbonate reservoir method for quickly identifying under the conditions of a kind of PDC drill bit - Google Patents
Carbonate reservoir method for quickly identifying under the conditions of a kind of PDC drill bit Download PDFInfo
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- CN108343425A CN108343425A CN201810161423.XA CN201810161423A CN108343425A CN 108343425 A CN108343425 A CN 108343425A CN 201810161423 A CN201810161423 A CN 201810161423A CN 108343425 A CN108343425 A CN 108343425A
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- Prior art keywords
- pdc
- work
- reservoir
- work index
- carbonate
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
Abstract
The invention discloses carbonate reservoir method for quickly identifying under the conditions of a kind of PDC drill bit, it is calculated as model with physics work(, be fitted well logging bore when, torque, drill speed parameter, the drillability of carbonate formation is judged by fitting parameter size, fitting parameter numerical value is bigger, and carbonate formation drillability is poorer, otherwise drillability is good.Carbonate formation drillability is better, illustrates that carbonate reservoir fracture hole is more developed.Recognition methods of the present invention realizes carbonate reservoir continuously quickly identification and classification, efficiently solves the industry problems of carbonate reservoir identification and classification；Carbonate reservoir recognition accuracy and efficiency are improved, integrated logging engineering parameter application power in oil and gas well drilling has been expanded.
Description
Technical field
The invention belongs to carbonate rocks under the conditions of carbonate reservoir identification technology field more particularly to a kind of PDC drill bit
Reservoir method for quickly identifying.
Background technology
Carbonate rock is a kind of rock that densification is hard, after experience tectonic movement, weathering, leaching, carbonate rock rock
Stone forms the crack being unevenly distributed, solution cavity, these fracture holes are oil, natural gas provides aggregation space.In petroleum gas
It needs carbonate fracture, solution cavity development section being identified during exploration and development, is drilling well finishing drilling well depth, the survey of midway oil gas
Examination, completion program, which determine, provides scientific basis.Previous identification carbonate reservoir mainly uses two methods：First, electric logging skill
Art, this method will carry out after completion, constrain the timely decision in drilling well；Second is that conventional logging method, with relying on gas in brill
It surveys and engineering parameter data carries out RESERVOIR RECOGNITION, but comparability is poor, using being restricted.In addition it is observation rock core crack hair
Length, width, density, filling situation evaluation reservoir are educated, because drilling and coring delivery is of high cost, cored interval is limited, cannot be to carbonate
Rock reservoir carries out system evaluation.
Above two method major defect is that poor continuity, comparability are poor, and lag, and affects petroleum gas brill
Well production decision.
Invention content
The technical problem to be solved in the present invention is to provide under the conditions of a kind of PDC drill bit the carbonate reservoir quickly side of identification
Method realizes carbonate reservoir with continuous identification is bored, improves RESERVOIR RECOGNITION accuracy rate and efficiency, expanded compound logging work
Journey parameter application power in oil and gas well drilling.
In order to solve the above technical problems, the technical solution adopted by the present invention includes the following steps：
The first step acquires whole rice logging parameters
In oil drilling, bore after meeting carbonate rock rock stratum, acquisition well depth, when boring, bit pressure, torque, drill speed and rock
Property parameter, and database is established based on well depth；
Second step PDC work indexes calculate
It by the whole rice logging parameters data of acquisition, brings PDC work index calculation formula into and is calculated, establish corresponding with well depth
PDC work index databases；
Third step draws PDC work(well logs
Using whole rice well depth as base unit, from top to bottom from shallow to deep, corresponding well depth draws lithologic symbol and PDC work(to well depth
Exponential curve；
4th step PDC work index curve baselines are drawn
According to PDC work index tracing pattern features, two kinds of drafting PDC work index Baseline Methods, the first broken rock can be divided into
When work index curvilinear trend is straight line, it is baseline value to take its broken rock work index average value；Second of broken rock work index curvilinear trend
For oblique line when, establish broken rock work index and well depth relation formula, according to regression formula calculate baseline value；Baseline value will be segmented and broken
Rock work index curve identical ratio is plotted in same figure road；
5th step carbonate reservoir identifies
Identical well depth PDC work indexes curve compared with PDC work index baselines, PDC work index curves are referred to less than PDC work(
The well section of base line is identified as Reservoir Section；
6th step carbonate reservoir is classified
Using identical well depth PDC work indexes parameter and PDC work index baseline parameter ratios as reservoir grading index, ratio
Smaller reservoir is more developed, and ratio is bigger, and reservoir is poorer, and reservoir grading is carried out according to ratio.
Carbonate reservoir method for quickly identifying provided by the present invention, compensates for the methods of conventional logging and well logging carbon
The deficiency of Carbonate Reservoir recognition methods realizes carbonate reservoir continuously quickly identification and classification under the conditions of PDC drill bit, has
Effect solves the industry problems of carbonate reservoir identification and classification；Carbonate reservoir recognition accuracy and efficiency are improved,
Integrated logging engineering parameter application power in oil and gas well drilling is expanded.
Description of the drawings
Fig. 1 quickly identifies schematic diagram for carbonate reservoir under the conditions of PDC drill bit；
Fig. 2 is that PDC work index trend is that oblique line base line draws schematic diagram.
Specific implementation mode
Below in conjunction with the accompanying drawings to carbonate reservoir method for quickly identifying under the conditions of a kind of PDC drill bit provided by the present invention
It is described in further detail.Implementation process includes the following steps：
First step carbonate reservoir identifies that well section determines
According to geological logging lithological profile, determine that carbonate formation is RESERVOIR RECOGNITION well section, as 2202 in Fig. 1~
2340m well sections.
Second step PDC work indexes calculate
PDC work index computation models：
Work(is equal to power and object, and the product at a distance from is based on this in the direction of the force.
W=FS ... ... ... ... ... ... ... ... ... ... ... is 1.
1. middle W refers to work(, unit J to formula；F refers to the size of power, unit N；S refers to what object moved on the direction of this power
Distance, unit m.
PDC drill bit in rock break-off process, broken rock power substantially in horizontal direction, by distance be drill one meter of carbonate rock
The number of turns that earth boring bit turns, for this purpose, the variation of PDC work index calculation formula is：
W=N ﹡ Z ﹡ R ... ... ... ... ... ... ... ... ... ... are 2.
2. middle W refers to PDC work indexes to formula, and N refers to the size of power, is the torque during actual well drilled, unit kN.m；Z ﹡ R
Refer to the number of turns that drill bit is rotated up in the side of N power.Wherein Z is when boring, and unit min/m, R are drill speed, unit rpm.
When the whole rice of the well logging of acquisition is bored, torque, revolution supplemental characteristic, bring PDC work index calculation formula into and 2. counted
It calculates, establishes PDC work(number database corresponding with well depth；
Third step draws PDC work index well logs
In Fig. 1, using whole rice well depth as base unit on longitudinal direction, from top to bottom well depth from shallow to deep, draw by corresponding well depth
Lithologic symbol and PDC work index curves；
4th step PDC work index curve baselines are drawn
According to PDC work index tracing pattern features, there are two types of PDC work index Baseline Methods are drawn, the first is as in Fig. 1
2202~2240m well sections, PDC work index curvilinear trends are straight line, by PDC work index arithmetic means in 2202~2238m well sections
Value is 2202~2240m well section baseline values, and wherein 2239m, 2240m exceptional value is not involved in calculating.2400~2284m well sections, PDC
Work index curvilinear trend is straight line, but different from 2202~2240m well section PDC work index base values, also to be calculated separately, by 2241
PDC work index arithmetic averages are 2400~2284m well section baseline values in~2250m, 2257~2284m well sections, wherein 2251
~2257m abnormal sections are not involved in calculating.
2285~2334m well sections in second such as Fig. 1, PDC work index curvilinear trends are oblique line, in oblique line Trendline,
In, choose on lower three positions and to stablize relatively and close to Trendline well section PDC work index numerical value, as in Fig. 1 2294m,
2308m, 2331m work index numerical value establish PDC work indexes and well depth relation formula such as Fig. 2, and baseline is calculated according to regression formula
Value.
Such as Fig. 1, the segmentation PDC work indexes baseline value of acquirement and PDC work index curve identical ratios are plotted in same figure
Road；
5th step carbonate reservoir identifies
Such as Fig. 1, identical well depth PDC work indexes curve is compared with PDC work index baselines, by PDC work index curves
Well section less than PDC work index baselines is identified as Reservoir Section；
6th step carbonate reservoir is classified
Such as Fig. 1, using identical well depth PDC work indexes parameter and PDC work index baseline parameter ratios as reservoir grading index,
The smaller reservoir of its ratio is more developed, and ratio is bigger, and reservoir is poorer, and reservoir grading is carried out according to ratio.
Carbonate reservoir grade scale：
B=Wp/WP bases……………………………………………………………③
3. middle B is work index ratio, W to formulapPDC work indexes, WP basesFor PDC work index baselines.
Carbonate reservoir is divided into three-level：
Thief zone reservoir (I)：B≤0.2；Middle permeable formation (II)：0.2 B≤0.6 ＜；Less permeable layer (III)：0.6 ＜ B≤
0.8。
Such as Fig. 1, well section 2250~2253m work index ratios belong to two class reservoirs for 0.5, and well section 2254~2256m work(refers to
Number ratio belongs to a kind of reservoir for 0.16.
In conclusion present disclosure is not limited in the above embodiments, the knowledgeable people in same area can
Can propose other embodiments easily within the technological guidance's thought of the present invention, but this embodiment is included in this hair
Within the scope of bright.
Claims (1)
1. carbonate reservoir method for quickly identifying under the conditions of a kind of PDC drill bit, which is characterized in that include the following steps：
The first step acquires whole rice logging parameters
In oil drilling, bore after meeting carbonate rock rock stratum, acquisition well depth, when boring, bit pressure, torque, drill speed and lithology ginseng
Number, and database is established based on well depth；
Second step, PDC work indexes calculate
It by the whole rice logging parameters data of acquisition, brings PDC work index calculation formula into and is calculated, establish corresponding with well depth
PDC work index databases；
Third walks, and draws PDC work(well logs
Using whole rice well depth as base unit, from top to bottom from shallow to deep, corresponding well depth draws lithologic symbol and PDC work indexes to well depth
Curve；
4th step, PDC work index curve baselines are drawn
It is divided into two kinds of drafting broken rock work index baselines, the first broken rock work index curve according to broken rock work index tracing pattern feature
When trend is straight line, it is baseline value to take its broken rock work index average value；When second of broken rock work index curvilinear trend is oblique line, build
Vertical broken rock work index and well depth relation formula, baseline value is calculated according to regression formula；It will segmentation baseline value and broken rock work index song
Line same ratio is plotted in same figure road；
5th step, carbonate reservoir identification
Identical well depth PDC work indexes curve compared with PDC work index baselines, PDC work index curves are less than PDC work index bases
The well section of line is identified as Reservoir Section；
6th step, carbonate reservoir classification
Using identical well depth PDC work indexes parameter and PDC work index baseline parameter ratios as reservoir grading index, ratio is smaller
Reservoir is more developed, and ratio is bigger, and reservoir is poorer, and reservoir grading is carried out according to ratio.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810161423.XA CN108343425A (en) | 2018-02-27 | 2018-02-27 | Carbonate reservoir method for quickly identifying under the conditions of a kind of PDC drill bit |
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|---|---|---|---|
| CN201810161423.XA CN108343425A (en) | 2018-02-27 | 2018-02-27 | Carbonate reservoir method for quickly identifying under the conditions of a kind of PDC drill bit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110965999A (en) * | 2019-12-24 | 2020-04-07 | 中国石油集团渤海钻探工程有限公司 | Shale oil dominant lithology fine identification method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130032335A1 (en) * | 2011-08-05 | 2013-02-07 | Petrohawk Properties, Lp | System and Method for Quantifying Stimulated Rock Quality in a Wellbore |
| CN104153768A (en) * | 2014-07-04 | 2014-11-19 | 中国海洋石油总公司 | Granite reservoir stratum reservoir performance evaluation method |
-
2018
- 2018-02-27 CN CN201810161423.XA patent/CN108343425A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130032335A1 (en) * | 2011-08-05 | 2013-02-07 | Petrohawk Properties, Lp | System and Method for Quantifying Stimulated Rock Quality in a Wellbore |
| CN104153768A (en) * | 2014-07-04 | 2014-11-19 | 中国海洋石油总公司 | Granite reservoir stratum reservoir performance evaluation method |
Non-Patent Citations (1)
| Title |
|---|
| 纪伟等: "碳酸盐岩潜山录井快速评价技术", 《石油钻采工艺》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110965999A (en) * | 2019-12-24 | 2020-04-07 | 中国石油集团渤海钻探工程有限公司 | Shale oil dominant lithology fine identification method |
| CN110965999B (en) * | 2019-12-24 | 2022-04-12 | 中国石油集团渤海钻探工程有限公司 | Shale oil dominant lithology fine identification method |
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