CN102606136B - Logging-while-drilling value response law simulated experimental device - Google Patents
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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, for well logging during value response characteristic and Changing Pattern behind the Research on Oil gas well fluid intrusion pit shaft, belong to the oil drilling technology field.
Background technology:
Carry out efficiently the basic premise that deepwater drilling is the development and use offshore petroleum resources safely.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 environment and safety problem.Therefore, the research that reinforcement is applicable to 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 monitoring well kick method the monitoring well kick method of floating drilling rig working environment.
Deepwater drilling is highly difficult, the characteristics of high investment, high repayment to the application of well logging during (Logging While Driiling, LWD) technology provide need and may, the LWD technology is used widely aspect deepwater drilling 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 by resistivity, natural gamma, sound wave etc., and the mode of measurement result by mud-pulse is transferred to rapidly ground carries out Treatment Analysis, the spread speed of mud-pulse can reach the 1000-1500 meter per second, can just read real-time downhole data and the formation parameter of a few km well depths after several seconds by the LWD instrument.If in the drilling process, the gas in the stratum is invaded annular space, will inevitably change shaft bottom on every side composition and the physical property of annular fluid, and also inevitable measured value at LWD responds out.
The well logging person finds the solution the response characteristic of well logging during value by numerical simulation, but when setting up model and equation is carried out numerical solution, all be to process 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 should not carry out experimental verification, therefore how to judge according to response characteristic and the Changing Pattern of well logging during value (resistivity, gamma, sound wave) after overflow occurs whether overflow is the difficult point of well kick early monitoring and prevention.Although there is at present the multiphase flow experiment device can be used for the pit shaft that the simulation gas cut occurs, 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 there is not yet report.
Summary of the invention:
Purpose of the present invention will provide a kind of well logging during value response pattern analogue experiment installation exactly, for the response characteristic of each well logging during value after overflow occurs behind the Research on Oil gas well fluid intrusion pit shaft, solve the response characteristic that numerical simulation can't obtain and affect rule, provide support for researching and developing based on the drilling well overflow technique for detection of well logging during value.
The present invention is by being positioned between two parties the experiment pit shaft with resistivity logging while drilling with boring gamma-ray tool, by inject respectively the salt solution of air, diesel oil, different salinities to pit shaft, the ground acquisition data are also analyzed the resistivity logging while drilling log value and 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 by void content meter, high precision flow the Changing Pattern of quantification fluid intrusion amount and well logging during value.
Experimental facilities proposed by the invention mainly comprises: experiment pit shaft, gas injection system, liquid injection system, gas generator, well logging during instrument system and data acquisition and analysis system.The experiment pit shaft is comprised of top glass lengths of steel pipes and bottom Open-Hole Section, top glass lengths of steel pipes outer wall and the ground consolidation of loosening, the bottom Open-Hole Section is placed annular ore post and the gas generator that different lithology forms, the packing material of annular ore post is that sand shale is mineral, 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 Length Ratio of top glass lengths of steel pipes and bottom Open-Hole Section is 7: 10.Gas injection system is made 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 of interior slurry tank, charge pump and corresponding liquid line 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, the core of gas generator is solid cylinder, solid cylinder is external to be ring network trellis bubble generation net, the outmost turns of gas generator is annular bonding place, the annular ore post that forms 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 cylinder, bubble generation net and bonding place three parts.The well logging during instrument system by resistivity logging while drilling log well inserting tube, drill-following natural gamma well logging inserting tube, measure pipe nipple (comprising lithium battery) and be composed in series, measure pipe nipple outer with centralizer, whole well logging during instrument system is hung by the ground boat and hangs in the pit shaft.The well logging during value that data acquisition and analysis system is surveyed by resistivity logging while drilling well logging inserting tube and drill-following natural gamma well logging inserting tube reaches ground-based computer through decoder 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 Open-Hole Section count transmission line by void content and reach ground-based computer analysis.
Can read in real time the resistivity of different investigation depths (dark, in, shallow) by the resistivity logging while drilling logging instrument, electromagnetic wave emission radius is 559-1016mm, can cover annular ore 4 and the bore hole stratum 2 of different lithology in the pit shaft; Can read in real time natural gamma value of reading under the different operating modes with boring gamma-ray tool, according to the natural gamma-ray spectrometry response theory, 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; The void content meter can be measured cross-sectional mean void fraction and the void 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 truer simulated formation fluid, the process of overflow occurs; Whole experiment pit shaft can the Reality simulation formation condition, satisfies the environmental requirement of resistivity logging while drilling well logging.
2. can obtain the response characteristic that the heterogeneity fluid is invaded well logging during value behind the pit shaft by data acquisition unit; By 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 providing theoretical foundation and technical support based on LWD well kick early monitoring model, deep water well kick early monitoring etc.
Description of drawings:
Fig. 1 is device flow chart of the present invention.
Fig. 2 is that the present invention simulates the device flow chart of gas cut when occuring.
Fig. 3 is the structural representation of gas generator.
Among the figure, the 1-glass reinforced plastic pipe, earth loosens on 2-ground, the 3-Open-Hole Section, 4-annular ore post, 5-air compressor machine, 6-high-precision gas flow meter, 7-pressure meter, 8-gas line, the 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-resistivity logging while drilling well logging inserting tube, 19-drill-following natural gamma well logging inserting tube, 20-measures pipe nipple (comprising lithium battery), the 21-centralizer, 22-decoder, 23-log value data line, the 24-computer, 25-Open-Hole Section impedance type void content meter, 26-glass fiber reinforced plastic pipeline section impedance type void content meter, the 27-void content counts transmission 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 drawings and embodiments.
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 Open-Hole Section 3 is placed annular ore post 4 and the gas generator 14 that is comprised of different lithology, and bottom Open-Hole Section length is 10 meters.Gas generator 14 is oblate cylinder body shape, the core of gas generator is solid cylinder 17, solid cylinder is external to be ring network trellis bubble generation net 15, the outmost turns of gas generator is annular bonding place 16, and the annular ore post 4 that forms with different lithology is bonded together and is positioned on the support 31 of wellbore bottom.Consist of 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, gas injects wellbore bottom through gas line 8, and wellbore bottom produce air pocket 28 through gas generator 14 generate continuously, uniform micro-bubble 29, simulation gas cut generating process, gas injection rate is by high-precision gas flow meter 6 and pressure meter 7 meterings.Be composed in series successively the well logging during instrument system by resistivity logging while drilling well logging inserting tube 18, drill-following natural gamma well logging inserting tube 19, measurement pipe nipple (comprising lithium battery) 20, measure pipe nipple outer with centralizer 21, whole well logging during instrument system hangs 30 by the ground boat and hangs in the pit shaft.The well logging during value of being surveyed by resistivity logging while drilling well logging inserting tube 18 and drill-following natural gamma well logging inserting tube 19 reaches ground-based computer 24 through decoder 22 and log value data line 23 and carries 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 the impedance type void content meter 26 of glass fiber reinforced plastic pipeline section and Open-Hole Section count transmission line 27 by void content and reach ground-based computer 24 and carry out analyzing and processing, obtain the Changing Pattern of gas cut amount, cross-sectional mean 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 occuring.
Device for carrying out said is with embodiment 1, as shown in Figure 1, just use liquid injection system and close gas injection system, namely consist of liquid injection system by interior slurry tank 9, charge pump 11 and corresponding liquid line 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 slurry tank 9 interior liquid-liquid lines 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, configures the salt solution of different salinities in slurry tank 9, 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 making under enlightenment of the present invention, 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 the experiment pit shaft, gas injection system, liquid injection system, gas generator, well logging during instrument system and data acquisition and analysis system, it is characterized in that: the experiment pit shaft is comprised of top glass lengths of steel pipes and bottom Open-Hole Section, top glass lengths of steel pipes outer wall and the ground consolidation of loosening, the bottom Open-Hole Section is placed by potassium, annular ore post and gas generator that three kinds of ores of uranium and thorium form, gas generator is oblate cylinder, the core of gas generator is solid cylinder, solid cylinder is external to be ring network trellis bubble generation net, the outmost turns of gas generator is annular bonding place, and the annular ore post that forms with different lithology is bonded together and is positioned over wellbore bottom; Consist of 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 of interior slurry tank, charge pump and corresponding liquid line of joining agitator, the liquid line wellbore bottom of going directly, and injection rate is measured by flow meter; The well logging during instrument system is by the resistivity logging while drilling inserting tube of logging well, drill-following natural gamma well logging inserting tube, the measurement pipe nipple that comprises lithium battery is composed in series successively, measure pipe nipple outer with centralizer, whole well logging during instrument system is hung by the ground boat and hangs in the pit shaft, the well logging during value process decoder that resistivity logging while drilling well logging inserting tube and drill-following natural gamma well logging inserting tube are surveyed and log value data line reach ground-based computer and carry 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 Open-Hole Section count transmission line by void content and reach ground-based computer analysis.
2. experimental facilities according to claim 1, it is characterized in that: the top glass lengths of steel pipes of described experiment pit shaft and the Length Ratio of bottom Open-Hole Section are 7: 10.
3. experimental facilities according to claim 1, it is characterized in that: the thickness proportion of the solid cylinder of described gas generator, bubble generation net and bonding place three parts is 3: 1: 2.
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| CN105136904B (en) * | 2015-09-17 | 2016-05-25 | 西南石油大学 | Testing arrangement and the method for sound transmission characteristics in a kind of gas drilling drill string |
| 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 |
| 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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| US4538452A (en) * | 1983-11-14 | 1985-09-03 | Ontario Research Foundation | Bore-hole hydraulics simulator |
| WO2005071222A1 (en) * | 2004-01-20 | 2005-08-04 | Saudi Arabian Oil Company | Real time earth model for collaborative geosteering |
| CN101560880B (en) * | 2009-05-15 | 2012-12-19 | 中国石油大学(华东) | Supercritical well bore multi-phase flow test device |
| CN101709639B (en) * | 2009-11-20 | 2013-08-21 | 中国石油大学(华东) | Mineshaft multiphase flow device for simulating deep-water oil and gas production |
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