CN110056345B - Logging evaluation method suitable for shale gas reservoir - Google Patents
Logging evaluation method suitable for shale gas reservoir Download PDFInfo
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- CN110056345B CN110056345B CN201811280049.1A CN201811280049A CN110056345B CN 110056345 B CN110056345 B CN 110056345B CN 201811280049 A CN201811280049 A CN 201811280049A CN 110056345 B CN110056345 B CN 110056345B
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- shale gas
- data
- gas reservoir
- well
- evaluation method
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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
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
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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
- 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 a logging evaluation method suitable for a shale gas reservoir, belonging to the technical field of logging evaluation of shale gas reservoirs, and the logging evaluation method suitable for a shale gas reservoir geological model comprises the following steps: s1: and (3) judging the underground condition according to the topographic survey: carrying out topographic survey on a mining destination before mining, judging the underground condition and the reservoir fracture condition according to the topographic condition, and making a corresponding well descending scheme; s2: performing geophysical well logging measurement; s4: the ground receiving end establishes a data-related line graph according to the received data, the scheme is characterized in that preliminary judgment is carried out by surveying the ground in advance, accurate instrument survey is carried out after the ground is lowered into the well, the measuring accuracy can be improved, and therefore the loss caused by misjudgment is reduced.
Description
Technical Field
The invention relates to the technical field of logging evaluation of shale gas reservoirs, in particular to a logging evaluation method suitable for shale gas reservoirs.
Background
In recent years, logging technology is mainly used for researching reservoir properties, rock mechanical properties and shale theory and fracture development degree of shale gas reservoirs in the aspect of shale gas exploration and development. Reservoir properties, rock mechanical properties, shale theory and crack development degree of the shale gas reservoir have important relation with geological model recognition.
Evaluation aspect of shale gas reservoir: evaluating mineral components; evaluating geochemical parameters; evaluating physical property parameters; evaluating the air content; and (4) evaluating the fracturing performance.
The existing judgment mode is inaccurate in judgment result and easy to cause increase of exploitation difficulty degree, so that a logging evaluation method suitable for the shale gas reservoir is provided.
Disclosure of Invention
The invention aims to provide a logging evaluation method suitable for a shale gas reservoir, and aims to solve the problems that the existing judgment mode provided in the background technology is inaccurate in judgment result and easy to cause increase of exploitation difficulty degree.
In order to achieve the purpose, the invention provides the following technical scheme: a logging evaluation method suitable for a shale gas reservoir is disclosed, and the logging evaluation method suitable for the shale gas reservoir geological model comprises the following specific steps:
s1: and (3) judging the underground condition according to the topographic survey: surveying the topography of a mining destination before mining, and making a corresponding well descending scheme;
s2: performing geophysical well logging measurements: performing well drilling according to the well drilling scheme formulated in the step S1, and entering a well drilling measuring instrument into the well through a cable to perform geophysical well logging;
s3: transmitting the measurement data to the ground in real time: the method comprises the following steps that a downhole measuring instrument carries out real-time measurement data and uploads the real-time measurement data to a ground instrument, the ground instrument receives the depth of a cable to be measured downhole and receives the real-time measurement data of the downhole measuring instrument, and the received two kinds of data are established into a form;
s4: the ground receiving end establishes a data correlation line graph according to the received data: and (4) establishing a data-related line graph according to the cable downhole depth and the real-time measurement data of the downhole measurement instrument received in the step (S3), displaying in a coordinate system mode, and judging the geological model of the shale gas reservoir by the staff according to the established data-related line graph.
Preferably, the downhole measuring instrument comprises a nuclear magnetic resonance measuring instrument, an imaging measuring instrument and a sensing probe chemical composition measuring instrument.
Preferably, the cable in step S2 is a cable with a length measuring function.
Preferably, the two data of the table created in step S3 are in one-to-one correspondence.
Compared with the prior art, the invention has the beneficial effects that: this scheme carries out preliminary judgement through surveying ground in advance, carries out accurate instrument after going into the well and surveys, can improve measuring accuracy to reduce the loss that judgement error caused.
Drawings
FIG. 1 is a flow chart of the operation of the well logging evaluation method of the present invention;
FIG. 2 is a graph of a total nuclear magnetic resonance log for determining shale reservoir porosity and TOC simulation logs in accordance with an embodiment of the present invention;
FIG. 3 is a log-section evaluation simulation record diagram of the micro-pore components and the gas content of the shale gas reservoir in the embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: a logging evaluation method suitable for a shale gas reservoir is disclosed, and the logging evaluation method suitable for the shale gas reservoir geological model comprises the following specific steps:
s1: and (3) judging the underground condition according to the topographic survey: surveying the topography of a mining destination before mining, and making a corresponding well descending scheme;
s2: performing geophysical well logging measurements: performing well drilling according to the well drilling scheme formulated in the step S1, and entering a well drilling measuring instrument into the well through a cable to perform geophysical well logging;
s3: transmitting the measurement data to the ground in real time: the method comprises the following steps that a downhole measuring instrument carries out real-time measurement data and uploads the real-time measurement data to a ground instrument, the ground instrument receives the depth of a cable to be measured downhole and receives the real-time measurement data of the downhole measuring instrument, and the received two kinds of data are established into a form;
s4: the ground receiving end establishes a data correlation line graph according to the received data: and (4) establishing a data-related line graph according to the cable downhole depth and the real-time measurement data of the downhole measurement instrument received in the step (S3), displaying in a coordinate system mode, and judging the geological model of the shale gas reservoir by the staff according to the established data-related line graph.
The downhole measuring instrument comprises a nuclear magnetic resonance measuring instrument, an imaging measuring instrument and a sensing probe chemical composition measuring instrument, the cable in the step S2 is a cable with a length measuring function, and two kinds of data of the table established in the step S3 are in one-to-one correspondence.
Examples
S1: and (3) judging the underground condition according to the topographic survey: carrying out topography survey on a mining destination before mining, measuring the elevation of the mining destination, establishing coordinates by taking the elevation of the mining destination as a reference point, filling surrounding terrain into the coordinates by taking the position above the reference point as a positive direction and the position below the reference point as a negative direction, preliminarily judging the underground condition and the reservoir fracture condition according to the topography condition, and making a corresponding well-entering scheme;
s2: performing geophysical well logging measurements: performing well drilling according to the well drilling scheme formulated in the step S1, performing well drilling according to the scheme, and allowing a well drilling measuring instrument to enter a well through a cable for geophysical well logging, wherein the well drilling measuring instrument comprises a nuclear magnetic resonance measuring instrument, an imaging measuring instrument and a sensing probe chemical composition measuring instrument, and performs the operation steps of resistivity well logging, acoustic well logging, natural potential well logging, natural gamma well logging, compensated neutron well logging, density well logging and well diameter well logging, and records data of the measuring results of the operation steps;
s3: transmitting the measurement data to the ground in real time: the method comprises the following steps that a downhole measuring instrument carries out real-time measurement data and uploads the real-time measurement data to a ground instrument, the ground instrument receives the depth of a cable to be measured downhole and receives the real-time measurement data of the downhole measuring instrument, and the received two kinds of data are established into a form;
s4: the ground receiving end establishes a data correlation line graph according to the received data: and (4) establishing a data-related line graph according to the cable downhole depth and the real-time measurement data of the downhole measurement instrument received in the step (S3), displaying in a coordinate system mode, judging the geological model of the shale gas reservoir by a worker according to the established data-related line graph, inputting recorded data in a simulation mode, and displaying a simulated output image by a simulation instrument.
As shown in fig. 2, nuclear magnetic resonance logging determines shale reservoir porosity and TOC;
as shown in fig. 3, a log evaluation simulation record chart of the micro-pore components and the gas content of the shale gas reservoir is shown.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. A logging evaluation method suitable for a shale gas reservoir is characterized by comprising the following steps: the specific method steps of the logging evaluation method suitable for the shale gas reservoir geological model are as follows:
s1: and (3) judging the underground condition according to the topographic survey: surveying the topography of a mining destination before mining, and making a corresponding well descending scheme;
s2: performing geophysical well logging measurements: performing well drilling according to the well drilling scheme formulated in the step S1, and entering a well drilling measuring instrument into the well through a cable to perform geophysical well logging;
s3: transmitting the measurement data to the ground in real time: the method comprises the following steps that a downhole measuring instrument carries out real-time measurement data and uploads the real-time measurement data to a ground instrument, the ground instrument receives the depth of a cable to be measured downhole and receives the real-time measurement data of the downhole measuring instrument, and the received two kinds of data are established into a form;
s4: the ground receiving end establishes a data correlation line graph according to the received data: and (4) establishing a data-related line graph according to the cable downhole depth and the real-time measurement data of the downhole measurement instrument received in the step (S3), displaying in a coordinate system mode, and judging the geological model of the shale gas reservoir by the staff according to the established data-related line graph.
2. The well logging evaluation method suitable for the shale gas reservoir as claimed in claim 1, wherein: the downhole measuring instrument comprises a nuclear magnetic resonance measuring instrument, an imaging measuring instrument and a sensing probe chemical composition measuring instrument.
3. The well logging evaluation method suitable for the shale gas reservoir as claimed in claim 1, wherein: the cable in step S2 is a cable having a length measuring function.
4. The well logging evaluation method suitable for the shale gas reservoir as claimed in claim 1, wherein: the two kinds of data of the table created in step S3 are in one-to-one correspondence.
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| CN110056345B true CN110056345B (en) | 2020-11-24 |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3858445A (en) * | 1973-03-20 | 1975-01-07 | Harold J Urbanosky | Methods and apparatus for testing earth formations |
| CN102893183A (en) * | 2010-03-05 | 2013-01-23 | 瓦勒吉有限责任公司 | Active noise injection computations for improved predictability in oil and gas reservoir discovery and characterization |
| CN102966344A (en) * | 2012-11-20 | 2013-03-13 | 中国地质大学（武汉） | Shaft bottom air current uplift parameter detection device for coal bed gas exhaust and recovery shaft |
| CN103883320A (en) * | 2014-03-26 | 2014-06-25 | 中国石油天然气集团公司 | Logging-while-drilling method based on time lapse |
| CN104853822A (en) * | 2014-09-19 | 2015-08-19 | 杨顺伟 | Method for evaluating shale gas reservoir and searching sweet spot region |
| CN105507890A (en) * | 2014-09-26 | 2016-04-20 | 中国石油化工股份有限公司 | Logging evaluation method suitable for shale gas reservoir geological model |
| CN105842733A (en) * | 2016-03-17 | 2016-08-10 | 成都创源油气技术开发有限公司 | Shale reservoir earthquake identification method |
| CN106168685A (en) * | 2015-09-08 | 2016-11-30 | 西南石油大学 | A kind of shale gas individual well geological syntheses evaluation methodology |
| CN106560820A (en) * | 2016-10-09 | 2017-04-12 | 钦州学院 | Shale gas reservoir logging evaluating method |
-
2018
- 2018-10-30 CN CN201811280049.1A patent/CN110056345B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3858445A (en) * | 1973-03-20 | 1975-01-07 | Harold J Urbanosky | Methods and apparatus for testing earth formations |
| CN102893183A (en) * | 2010-03-05 | 2013-01-23 | 瓦勒吉有限责任公司 | Active noise injection computations for improved predictability in oil and gas reservoir discovery and characterization |
| CN102966344A (en) * | 2012-11-20 | 2013-03-13 | 中国地质大学（武汉） | Shaft bottom air current uplift parameter detection device for coal bed gas exhaust and recovery shaft |
| CN103883320A (en) * | 2014-03-26 | 2014-06-25 | 中国石油天然气集团公司 | Logging-while-drilling method based on time lapse |
| CN104853822A (en) * | 2014-09-19 | 2015-08-19 | 杨顺伟 | Method for evaluating shale gas reservoir and searching sweet spot region |
| CN105507890A (en) * | 2014-09-26 | 2016-04-20 | 中国石油化工股份有限公司 | Logging evaluation method suitable for shale gas reservoir geological model |
| CN106168685A (en) * | 2015-09-08 | 2016-11-30 | 西南石油大学 | A kind of shale gas individual well geological syntheses evaluation methodology |
| CN105842733A (en) * | 2016-03-17 | 2016-08-10 | 成都创源油气技术开发有限公司 | Shale reservoir earthquake identification method |
| CN106560820A (en) * | 2016-10-09 | 2017-04-12 | 钦州学院 | Shale gas reservoir logging evaluating method |
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