CN102606136A - Logging-while-drilling value response law simulated experimental device - Google Patents
Logging-while-drilling value response law simulated experimental device Download PDFInfo
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Abstract
The invention relates to a logging-while-drilling value response law simulated experimental device, which comprises an experimental shaft, a gas injection system, a liquid injection system, a gas generator, a logging-while-drilling tool and a data acquiring and analyzing system. The experimental shaft consists of an upper glass fiber reinforced plastic tube section and a lower open hole section, the outer wall of the upper glass fiber reinforced plastic tube section is fixed combined with loose soil on the ground, annular ore columns with different lithological characters and the gas generator are placed on the lower open hole section, the logging-while-drilling tool consisting of a logging-while-drilling resistivity probe, a logging-while-drilling natural gamma probe and a measuring pup joint which are successively serially connected is hung in the shaft in a combined manner, air, diesel oil and salt water with different mineralization degrees are respectively injected into the bottom of the shaft via the gas injection system or the liquid injection system, an overflowing condition of fluid with different characteristics in a stratum is simulated when the fluid flows into the shaft, logging-while-drilling value data are acquired on the ground and are analyzed, the response characteristic of a logging-while-drilling value of the fluid with different characteristics when the fluid flows into the shaft is obtained, and the change law of fluid flowing and logging-while-drilling values is quantified via a porosity meter and a high-precision flowmeter.
Description
Technical field:
The present invention relates to a kind of well logging during value response pattern analogue experiment installation, be used to study the oil gas well fluids and invade well logging during value response characteristic and Changing Pattern behind the pit shaft, belong to the oil drilling technology field.
Background technology:
Carrying out the deep water probing efficiently safely, is a basic premise of development and use offshore petroleum resources.The deep water well control is a difficult point of deepwater drilling safety, how to find early and effectively that overflow is the key of deep water well control, otherwise, will bring serious environmental and safety problem.Therefore; Reinforcement is applicable to that the research of the overflow early monitoring of deepwater drilling operation has great importance, and the work characteristics of ocean deepwater floating drilling rig also requires must select more accurately and more to adapt to than conventional well kick monitoring method the well kick monitoring method of floating drilling rig working environment.
Deepwater drilling is highly difficult, the characteristics of high investment, high repayment are given well logging during (Logging While Driiling, LWD) The Application of Technology provide need and maybe, the LWD technology is being used widely aspect the deep water probing at present.LWD is used for the parameter sensors of formation evaluation and measures the formation rock physical parameter in the process of drilling well through resistivity, natural gamma, sound wave etc.; And the mode of measurement result through mud-pulse is transferred to ground rapidly carries out Treatment Analysis; The spread speed of mud-pulse can reach the 1000-1500 meter per second, can after several seconds, just read the real-time downhole data and the formation parameter of a few km well depths through the LWD instrument.If in the drilling process, the gas in the stratum is invaded annular space, will inevitably change the shaft bottom composition and the rerum natura of annular fluid on every side, also must on the measured value of LWD, response come out.
The well logging worker finds the solution the response characteristic of well logging during value through numerical simulation; But when setting up model and equation is carried out numerical solution, all be to handle according to the relevant physical parameter of even single medium; After not considering that formation fluid is invaded pit shaft; Annular fluid no longer is single-phase mud system; But the multiphase mixture of mud-gas, mud-formation fluid, the annular space characteristic of this multiphase mixture matter and the physical parameter of single mud system have very big difference, and can have a strong impact on the response results of well logging during value.Because equation solution is complicated; Be difficult to accurately find the solution and obtain corresponding rule; And the checking that should not experimentize, therefore how to judge according to the response characteristic and the Changing Pattern of well logging during value (resistivity, gamma, sound wave) after overflow takes place whether overflow is the difficult point of well kick early monitoring and prevention.Although there is the multiphase flow experimental facilities can be used to simulate the pit shaft that gas cut takes place at present; Experimental situation is restricted on every side with pit shaft but these experimental facilities are owing to borehole size is little; Can't satisfy the requirement of logging tool; And can't reach simulation stratum condition, the experimental facilities of at present can simulated oil invade, formation water being invaded the pit shaft this respect does not appear in the newspapers as yet.
Summary of the invention:
The object of the invention will provide a kind of well logging during value response pattern analogue experiment installation exactly; Be used to study the oil gas well fluids and invade the response characteristic of each well logging during value after overflow takes place behind the pit shaft; Solve response characteristic that numerical simulation institute can't obtain and influence rule, provide support for researching and developing based on the drilling well overflow technique for detection of well logging during value.
The present invention will be through will be positioned over the experiment pit shaft with brill resistivity with boring gamma-ray tool between two parties; Through inject the salt solution of air, diesel oil, different salinities respectively to pit shaft; The ground image data is also analyzed with brill resistivity logging value with boring the gamma logging value; Thereby obtain the response characteristic that the heterogeneity fluid is invaded well logging during value behind the pit shaft, and can come the Changing Pattern of quantification fluid intrusion amount and well logging during value through void content meter, high precision flow.
Experimental facilities proposed by the invention mainly comprises: experiment pit shaft, gas injection system, liquid injection system, gas generator, logging while drilling apparatus and data acquisition and analysis system.The experiment pit shaft is made up of top glass lengths of steel pipes and bottom bore hole section; Top glass lengths of steel pipes outer wall and the ground consolidation of loosening; Bottom bore hole section is placed annular ore post and the gas generator that different lithology is formed; The packing material of annular ore post is that sand shale is mineral, and wherein the weight content of potassium, uranium, thorium ore is potassium (K) 7.5%, uranium (U) 10 μ g/g, thorium (Th) 35 μ g/g.The top glass lengths of steel pipes is 7: 10 with the length ratio of bottom bore hole section.Gas injection system is made up of air compressor machine and gas line, the gas line wellbore bottom of going directly, and gas injection rate is by high-precision gas flow meter and pressure meter metering.Liquid injection system is made up of interior slurry tank, charge pump and corresponding liquid pipeline of joining agitator, the liquid line wellbore bottom of going directly, and injection rate is measured by flow meter.Gas generator is oblate cylinder body shape; Core is a solid cylinder; Solid is outward a ring network trellis bubble generation net; Outmost turns is annular bonding place, and the annular ore post of forming with different lithology is bonded together and is positioned over wellbore bottom, is 3: 1: 2 according to the thickness ratio of pit shaft and logging tool size design solid, bubble generation net and bonding place three parts.The logging while drilling apparatus combination is measured pipe nipple and is had centralizer outward by being composed in series with brill resistivity logging inserting tube, drill-following natural gamma well logging inserting tube, measurement pipe nipple (comprising lithium battery), and whole logging instrument combination is navigated to hang by ground and hung in the pit shaft.Data acquisition and analysis system reaches ground-based computer by well logging during value process decoder of surveying with brill resistivity logging inserting tube and drill-following natural gamma well logging inserting tube and log value data line and carries out data acquisition and analysis, and two equal void fractions of impedance type void content meter institute's lining that are arranged on glass fiber reinforced plastic pipeline section and bore hole section reach ground-based computer analysis by void content meter data line.
Through reading the resistivity of different investigation depths (dark, in, shallow) in real time with boring resistivity tool, electromagnetic wave emission radius is 559-1016mm, can cover the annular ore 4 and the bore hole stratum 2 of different lithology in the pit shaft; Can read natural gamma value of reading under the different operating modes in real time with boring gamma-ray tool,, can obtain the Different Strata fluid and invade behind the pit shaft with the response characteristic of brill gamma logging value under the different lithology stratum according to the natural gamma-ray spectrometry response theory; The void content meter can be measured averga cross section void fraction and the void content fluctuation in the gas cut process pit shaft in real time, in order to judge flow pattern, to measure bobble rise velocity, void content velocity of wave propagation etc.
The invention has the beneficial effects as follows:
1. can invade pit shaft by true simulated formation fluid, the process of overflow takes place; Whole experiment pit shaft can simulates real layer condition on the spot, satisfy with the environmental requirement of boring resistivity logging.
2. can obtain the response characteristic that the heterogeneity fluid is invaded well logging during value behind the pit shaft through data acquisition unit; Through void content meter, high precision flow can quantification fluid intrusion amount and under the different lithology stratum Changing Pattern of well logging during value.
3. can be for theoretical foundation and technical support being provided based on LWD well kick early monitoring model, deep water well kick early monitoring etc.
Description of drawings:
Fig. 1 is a device flow chart of the present invention.
Fig. 2 is that the present invention simulates the device flow chart of gas cut when taking place.
Fig. 3 is the structural representation of gas generator.
Among the figure, 1-glass reinforced plastic pipe, the 2-ground earth that loosens, 3-bore hole section, 4-annular ore post, 5-air compressor machine; 6-high-precision gas flow meter, 7-pressure meter, 8-gas line, 9-slurry tank, 10-agitator, 11-charge pump; The 12-liquid line, 13-flow meter, 14-gas generator, 15-bubble generation net, 16-bonding place; 17-solid cylinder, 18-be with boring the resistivity logging inserting tube, 19-drill-following natural gamma well logging inserting tube, and 20-measures pipe nipple (comprising lithium battery), 21-centralizer; The 22-decoder, 23-log value data line, 24-computer, 25-bore hole section impedance type void content meter, 26-glass fiber reinforced plastic pipeline section impedance type void content meter; 27-void content meter data line, the 28-air pocket, the 29-micro-bubble, 30-ground boat is hung the 31-support.
The specific embodiment:
Further describe the present invention below in conjunction with accompanying drawing and embodiment.
Embodiment 1: obtain the description of well logging during value response characteristic and Changing Pattern under the simulation gas cut condition.
As shown in Figures 2 and 3, get length and be 17 meters experiment pit shaft, top is fixed with the loose earth 2 in 7 meters long glass reinforced plastic pipes 1 and ground, and bottom bore hole section 3 is placed annular ore post 4 and the gas generator of being made up of different lithology 14, and bottom bore hole segment length is 10 meters.Gas generator 14 is oblate cylinder body shape; Core is a solid cylinder 17; Solid is outward that net 15 takes place ring network trellis bubble, and outmost turns is annular bonding place 16, and the annular ore post of forming with different lithology 4 is bonded together and is positioned on the support 31 of wellbore bottom.Constitute gas injection system by surface-based air compressor machine 5 and gas line 8; Gas line 8 through wellbore bottom; Air compressor machine 5 provides source of the gas, and gas injects wellbore bottom through gas line 8, and produces air pocket 28 through continuous, the uniform micro-bubble 29 of gas generator 14 generations in wellbore bottom; Simulation gas cut generating process, gas injection rate is by high-precision gas flow meter 6 and pressure meter 7 meterings.By being composed in series the logging while drilling apparatus combination successively with brill resistivity logging inserting tube 18, drill-following natural gamma well logging inserting tube 19, measurement pipe nipple (comprising lithium battery) 20; Measure pipe nipple and have centralizer 21 outward, whole logging instrument combination is hung 30 by the ground boat and is hung in the pit shaft.Reach ground-based computer 24 by the well logging during value of being surveyed with brill resistivity logging inserting tube 18 and drill-following natural gamma well logging inserting tube 19 through decoder 22 and log value data line 23 and carry out data acquisition and analysis, the response characteristic of well logging during value when obtaining gas cut.25 the equal void fractions of lining of impedance type void content meter that are installed in impedance type void content meter 26 and the bore hole section of glass fiber reinforced plastic pipeline section reach ground-based computer 24 by void content meter data line 27 and carry out analyzing and processing, obtain the Changing Pattern of gas cut amount, averga cross section void fraction and well logging during value.
Embodiment 2: simulated oil is invaded the description that obtains well logging during value response characteristic and Changing Pattern when taking place.
Device for carrying out said is with embodiment 1, and is as shown in Figure 1, just uses liquid injection system and closes gas injection system; Promptly constitute liquid injection system by interior slurry tank 9, charge pump 11 and corresponding liquid pipeline 12 of joining agitator 10; The through wellbore bottom of liquid line 12 configure the mud of different oil-water ratios in slurry tank 9, open charge pump 11 liquid-liquid lines in the slurry tank 9 12 are injected wellbore bottom; Simulated oil is invaded generating process, and injection rate is by flow meter 13 meterings.
Embodiment 3: under the simulated formation water intrusion condition, obtain the description of well logging during value response characteristic and Changing Pattern.
Device for carrying out said is used liquid injection system equally with embodiment 2, in slurry tank 9, configures the salt solution of different salinities, is injected into wellbore bottom and gets final product.
The present invention is not limited to above-mentioned preferred forms, and anyone should learn the structural change of under enlightenment of the present invention, making, and every have identical or close technical scheme with the present invention, all falls within protection scope of the present invention.
Claims (3)
1. well logging during value response pattern analogue experiment installation; Comprise experiment pit shaft, gas injection system, liquid injection system, gas generator, logging while drilling apparatus and data acquisition and analysis system; It is characterized in that: the experiment pit shaft is made up of top glass lengths of steel pipes and bottom bore hole section; Top glass lengths of steel pipes outer wall and the ground consolidation of loosening, bottom bore hole section is placed annular ore post and the gas generator of being made up of potassium, uranium and three kinds of ores of thorium, and gas generator is oblate cylinder; Core is a solid cylinder; Solid is outward a ring network trellis bubble generation net, and outmost turns is annular bonding place, and the annular ore post of forming with different lithology is bonded together and is positioned over wellbore bottom; Constitute gas injection system by surface-based air compressor machine and gas line, the gas line wellbore bottom of going directly, gas injection rate is by high-precision gas flow meter and pressure meter metering; Liquid injection system is made up of interior slurry tank, charge pump and corresponding liquid pipeline of joining agitator, the liquid line wellbore bottom of going directly, and injection rate is measured by flow meter; Logging while drilling apparatus makes up by the inserting tube of logging well with brill resistivity logging inserting tube, drill-following natural gamma, comprises that the measurement pipe nipple of lithium battery is composed in series successively; Measure pipe nipple and have centralizer outward; Whole logging instrument combination is hung by the ground boat and is hung in the pit shaft; Pass through decoder and log value data line and reach ground-based computer and carry out data acquisition and analysis with boring well logging during value that resistivity logging inserting tube and drill-following natural gamma well logging inserting tube survey, two equal void fractions of impedance type void content meter institute's lining that are arranged on glass fiber reinforced plastic pipeline section and bore hole section reach ground-based computer analysis by void content meter data line.
2. experimental facilities according to claim 1, the top glass lengths of steel pipes that it is characterized in that said experiment pit shaft is 7: 10 with the length ratio of bottom bore hole section.
3. experimental facilities according to claim 1 is characterized in that the thickness proportion of solid, bubble generation net and bonding place three parts of said gas generator is 3: 1: 2.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105136904A (en) * | 2015-09-17 | 2015-12-09 | 西南石油大学 | Testing device and method of sound wave transmission characteristics in gas drilling column |
| CN106707364A (en) * | 2016-11-30 | 2017-05-24 | 中石化石油工程技术服务有限公司 | Construction method of standard well for radar logging |
| CN107060737A (en) * | 2017-05-26 | 2017-08-18 | 中国石油天然气集团公司 | One kind is with brill gas cut analogue experiment installation and experimental method |
| CN113482605A (en) * | 2021-07-30 | 2021-10-08 | 中国地质大学（武汉） | Onshore drilling electromagnetic measurement-while-drilling signal transmission characteristic simulation experiment system and onshore drilling electromagnetic measurement-while-drilling signal transmission characteristic simulation experiment method |
| CN114352271A (en) * | 2020-09-29 | 2022-04-15 | 中国石油天然气集团有限公司 | Method for prejudging well kick and well leakage |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106707364B (en) * | 2016-11-30 | 2018-10-12 | 中石化石油工程技术服务有限公司 | A kind of construction method of radar logging standard well |
| CN107060737A (en) * | 2017-05-26 | 2017-08-18 | 中国石油天然气集团公司 | One kind is with brill gas cut analogue experiment installation and experimental method |
| CN107060737B (en) * | 2017-05-26 | 2020-09-08 | 中国石油天然气集团公司 | While-drilling gas invasion simulation experiment device and experiment method |
| CN114352271A (en) * | 2020-09-29 | 2022-04-15 | 中国石油天然气集团有限公司 | Method for prejudging well kick and well leakage |
| CN113482605A (en) * | 2021-07-30 | 2021-10-08 | 中国地质大学（武汉） | Onshore drilling electromagnetic measurement-while-drilling signal transmission characteristic simulation experiment system and onshore drilling electromagnetic measurement-while-drilling signal transmission characteristic simulation experiment method |
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| CN102606136B (en) | 2013-03-06 |
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