CN204228981U - Hydraulic fracturing measures downhole data collecting device and the acquisition system of terrestrial stress - Google Patents
Hydraulic fracturing measures downhole data collecting device and the acquisition system of terrestrial stress Download PDFInfo
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- CN204228981U CN204228981U CN201420768977.3U CN201420768977U CN204228981U CN 204228981 U CN204228981 U CN 204228981U CN 201420768977 U CN201420768977 U CN 201420768977U CN 204228981 U CN204228981 U CN 204228981U
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Abstract
The downhole data collecting device that the utility model provides a kind of hydraulic fracturing to measure terrestrial stress and acquisition system, described downhole data collecting device (100) comprising: upper shell (101), lower house (102), pressure acquisition sensor (103) and circuit board (104).Advantage is: (1) directly can gather the hydraulic pressure of crushing test section, therefore, do not need the hydraulic pressure value to downhole data collecting device 100 collects to revise, both improve the precision of geostress survey result, simplify the complexity of terrestrial stress computation process yet; (2) little to the transformation of existing hydraulic fracturing geostress survey system, additionally can not take the space of crushing test section, there is structure and simply, easily install and use and the advantage of long working life.
Description
Technical field
The utility model belongs to geostress survey technical field, is specifically related to downhole data collecting device and acquisition system that a kind of hydraulic fracturing measures terrestrial stress.
Background technology
Adopting hydraulic fracturing to measure terrestrial stress, having the following advantages: (1), without the need to knowing the mechanics parameter of rock mass, can obtain multiple terrestrial stress parameter in stratum; (2) have equipment simple, easy to operate, can to carry out continuously or repeated test, measuring speed is fast, measured value is directly perceived, the representative feature such as greatly of measured value in any degree of depth.Therefore, this method has broad application prospects.
The integral device of traditional water pressure supporing system as shown in Figure 1, comprises the first hydraulic pipeline 4, second hydraulic pipeline 5, upper packer 1, lower packet 2, connecting hose 3, pressure break pipe 11, flowmeter 9, water tank 10, back-water valve (BWV) 11, first high-pressure pump 7 and the second high-pressure pump 12, wherein, Fig. 2 is the scheme of installation of upper packer, lower packet and pressure break pipe, described connecting hose 3 is connected between upper packer and lower packet, and, the two ends of connecting hose are communicated with the cavity of lower packet with upper packer respectively, and the water inlet of upper packer is communicated with the second hydraulic pipeline 5, and the second hydraulic pipeline 5 is connected to water tank 10 by the second high-pressure pump 12, pressure break pipe is fixed between upper packer and lower packet, and pressure break pipe arranges several freeing port, and the water inlet of pressure break pipe is communicated with the first hydraulic pipeline 4, and the first hydraulic pipeline 4 is connected to water tank 10 by the first high-pressure pump 7, its principle of work is: the upper lower packet arranged in pairs is placed into the depth location that down-hole needs to measure, and by the supporting role of pressure break pipe, makes to form a space between lower packet, then, because upper packer and lower packet pass through soft pipe connection, therefore, second high-pressure pump 12 on ground draws water from water tank 10, and by the packer water filling up and down simultaneously of the second hydraulic pipeline 5, make upper and lower packer inflation and with hole wall close contact, thus formed packing space, i.e. crushing test section 6, then, the high-pressure pump 7 on ground draws water from water tank 10, and by the first hydraulic pipeline constantly to the water filling of pressure break pipe, pressure break pipe again by osculum constantly to by the draining of packing space, make constantly to be increased by packing space pressure, the part setting pressure sensor 8 on ground is positioned at the first hydraulic pipeline, the water delivery force value of pipeline is mounted by pressure transducer record ground, this force value can draw by packing space pressure value by conversion, therefore, by analyzing the force value relation over time that pressure transducer collects, obtain pressure record curve, by analyzing pressure record curve, Characteristic pressures parameter can be obtained, again according to corresponding theoretical calculation formula, just can obtain the rock mechanics parameters such as the value of minimum and maximum horizontal principal stress and the tensile strength of rock at measuring point place.
The subject matter that above-mentioned measuring system exists is: the water delivery force value for ground pipeline that pressure transducer collects, and due to the impact of the parameters such as pipe parameter, flow curve and the measuring point degree of depth, make pressure transducer collect force value can depart from crag crack, down-hole place carrying hydraulic pressure, thus, the simple force value that collected by pressure transducer is similar to the hydraulic pressure process carried by crag crack, down-hole place, can reduce the precision of geostress survey result.
For solving the problem, the force value that pressure transducer collects can be revised, but, in practical operation, the acquisition of pipe parameter and flow curve depends on on-the-spot test condition, and partial parameters needs to rely on guess or empirical value to obtain, therefore, the force value be difficult to pressure transducer collects accurately is revised, and brings very large error still can to last stress calculating results.
Utility model content
For the defect that prior art exists, the downhole data collecting device that the utility model provides a kind of hydraulic fracturing to measure terrestrial stress and acquisition system, can effectively solve the problem.
The technical solution adopted in the utility model is as follows:
The utility model provides a kind of hydraulic fracturing to measure the downhole data collecting device of terrestrial stress, and described downhole data collecting device (100) comprising: upper shell (101), lower house (102), pressure acquisition sensor (103) and circuit board (104);
Wherein, the crossing edge of described upper shell (101) and described lower house (102) is for being tightly connected; Described upper shell (101) has the first cavity (106), and, the shell wall of described upper shell (101) offers several osculums (105) be communicated with described first cavity (106), and the water under high pressure being injected into described first cavity (106) is discharged in crushing test section by described osculum (105);
Packed second cavity (107) of described lower house (102) tool, described pressure acquisition sensor (103) and described circuit board (104) are all fixed in described second cavity (107);
In addition, between described first cavity (106) and described second cavity (107), be provided with through hole, by described through hole, be communicated with described first cavity (106) and described second cavity (107); Probe and the described through hole of described pressure acquisition sensor (103) are tightly connected, and, described probe is positioned at the bottom of first cavity (106) of described upper shell (101), described probe is directly gathered be injected into the force value of the water of described first cavity (106).
Preferably, described upper shell (101) and described lower house (102) mode of being threaded connection are tightly connected.
Preferably, described through hole has internal thread; The probe of described pressure acquisition sensor (103) is provided with the external thread with described inside screw adaptation; The probe of described pressure acquisition sensor (103) is threaded connection mode and described through hole is tightly connected.
Preferably, described circuit board (104) comprising: input interface, data acquisition circuit, data-carrier store and power supply; One end of described input interface is electrically connected with described pressure acquisition sensor (103), and the other end of described input interface is connected with the input end of described data acquisition circuit, and the output terminal of described data acquisition circuit is connected with described data-carrier store; Described power supply is electrically connected with described input interface, described data acquisition circuit, described data-carrier store and described pressure acquisition sensor (103) respectively.
Preferably, described data acquisition circuit comprises the pre-amplification circuit, low-pass filter circuit and the high-pass filtering circuit that are connected in series.
Preferably, described circuit board also comprises output interface; Described output interface is connected with described data-carrier store.
Preferably, described output interface is USB interface or RS232 interface.
The utility model also provides a kind of downhole data acquisition system, comprises the downhole data collecting device that above-mentioned hydraulic fracturing measures terrestrial stress, also comprises upper packer, lower packet and pressure break pipe; Described downhole data collecting device comprises upper shell (101) and lower house (102);
The top of described pressure break pipe is fixedly connected with the bottom surface of described upper packer, the bottom of described pressure break pipe is fixedly connected with the top of described upper shell (101), and the bottom of described lower house (102) is fixedly connected with the end face of described lower packet.
The utility model also provides a kind of downhole data acquisition system, comprises the downhole data collecting device that above-mentioned hydraulic fracturing measures terrestrial stress, also comprises upper packer and lower packet; Described downhole data collecting device comprises upper shell (101) and lower house (102);
The top of described upper shell (101) is fixedly connected with the bottom surface of described upper packer, and the bottom of described lower house (102) is fixedly connected with the end face of described lower packet.
Preferably, the top of described upper shell (101) is fixedly connected with the underrun thread connecting mode of described upper packer, and the bottom of described lower house (102) is threaded connection mode with the end face of described lower packet and is fixedly connected with.
Downhole data collecting device and the acquisition system of the hydraulic fracturing measurement terrestrial stress that the utility model provides have the following advantages:
(1) directly can gather the hydraulic pressure of crushing test section, therefore, not need the hydraulic pressure value to downhole data collecting device 100 collects to revise, both improve the precision of geostress survey result, also simplified the complexity of terrestrial stress computation process;
(2) little to the transformation of existing hydraulic fracturing geostress survey system, additionally can not take the space of crushing test section, there is structure and simply, easily install and use and the advantage of long working life.
Accompanying drawing explanation
Fig. 1 is the integral device structural representation of traditional hydraulic fracturing geostress survey system;
Fig. 2 is the scheme of installation of upper packer, lower packet and pressure break pipe in traditional hydraulic fracturing geostress survey system;
The scheme of installation of the upper packer that Fig. 3 provides for the utility model, lower packet, pressure break pipe and downhole data collecting device;
The decomposing state schematic diagram of the downhole data collecting device that Fig. 4 provides for the utility model;
The sectional view of the downhole data collecting device that Fig. 5 provides for the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail:
The utility model provides a kind of hydraulic fracturing to measure the downhole data collecting device of terrestrial stress, directly can gather the hydraulic pressure of crushing test section, therefore, the hydraulic pressure value to downhole data collecting device 100 collects is not needed to revise, both improve the precision of geostress survey result, also simplify the complexity of terrestrial stress computation process, concrete, as shown in Figure 4, be the decomposing state schematic diagram of downhole data collecting device; As shown in Figure 5, be the sectional view of downhole data collecting device; Downhole data collecting device 100 comprises: upper shell 101, lower house 102, pressure acquisition sensor 103 and circuit board 104;
Wherein, the crossing edge of upper shell 101 and lower house 102 is for being tightly connected, and such as, the mode of being threaded connection is tightly connected; Upper shell 101 has the first cavity 106, and the shell wall of upper shell 101 offers several osculums 105 be communicated with the first cavity 106, and the water under high pressure being injected into the first cavity 106 is discharged in crushing test section by osculum 105;
Packed second cavity 107 of lower house 102 tool, pressure acquisition sensor 103 and circuit board 104 are all fixed in the second cavity 107;
In addition, between the first cavity 106 and the second cavity 107, be provided with through hole, by through hole, be communicated with the first cavity 106 and the second cavity 107; Probe and the through hole of pressure acquisition sensor 103 are tightly connected, and probe is arranged in the first cavity 106 of upper shell 101, probe are directly gathered be injected into the force value of the water of the first cavity 106.As the concrete example of one, through hole has internal thread; The probe of pressure acquisition sensor 103 is provided with the external thread with inside screw adaptation; The probe of pressure acquisition sensor 103 is threaded connection mode and through hole is tightly connected.
Pass through said structure, pressure acquisition sensor 103 and circuit board 104 are all fixed in the second cavity 107, when carrying out Hydraulic Fracturing Experiment, because the second cavity 107 is seal chamber, therefore, effectively prevent water under high pressure during pressure break from entering lower house cavity and damaging circuit board and pressure acquisition sensor; Again because the probe of pressure acquisition sensor is positioned at the bottom of the first cavity, therefore, when carrying out crushing test, water under high pressure is injected in the first cavity, thus the probe of pressure acquisition sensor is directly contacted with water under high pressure, the probe reaching pressure acquisition sensor directly measures the object of crushing test section hydraulic pressure.
In the utility model, by said structure, the subject matter that prior art exists can be solved.For the concrete electron device that circuit board comprises, those skilled in the art can flexible configuration as required.Below only introduce the concrete example of one of circuit board, circuit board comprises: input interface, data acquisition circuit, data-carrier store and power supply; One end of input interface is electrically connected with pressure acquisition sensor 103, and the other end of input interface is connected with the input end of data acquisition circuit, and the output terminal of data acquisition circuit is connected with data-carrier store; Power supply is electrically connected with input interface, data acquisition circuit, data-carrier store and pressure acquisition sensor 103 respectively.Circuit board also comprises output interface; Output interface is connected with data-carrier store.Output interface is USB interface or RS232 interface.
Its principle of work is: by input interface and data acquisition circuit, and the crushing test section hydraulic pressure value collected by pressure acquisition sensor is stored into data-carrier store; At the end of crushing test, downhole data collecting device being extracted into ground, by reading data-carrier store, pressure record curve can being obtained.Wherein, data acquisition circuit can comprise the pre-amplification circuit, low-pass filter circuit and the high-pass filtering circuit that are connected in series, processes for the virgin pressure value collected pressure acquisition sensor.
In the utility model, can various forms be adopted, above-mentioned downhole data collecting device is fixed to crushing test section, below introduce two kinds of concrete fixed forms:
(1) fixed form one
As shown in Figure 3, for the traditional hydraulic fracturing test macro be made up of upper packer, lower packet and pressure break pipe; Downhole data collecting device and pressure break pipe are coordinated, that is: downhole data collecting device comprises upper shell 101 and lower house 102; The top of pressure break pipe is fixedly connected with the bottom surface of upper packer, as screw connects; The bottom of pressure break pipe is fixedly connected with the top of upper shell 101, as screw connects; The bottom of lower house 102 is fixedly connected with the end face of lower packet, as screw connects; By this kind of mode, achieve the series connection of pressure break pipe and downhole data collecting device, that is: when crushing test, first ground water under high pressure is injected into pressure break pipe, upper shell 101 is injected into then again from pressure break pipe, the water under high pressure of pressure break pipe and upper shell 101 inside, all to the discharge of crushing test section, reaches the effect of pressure break.Visible, adopt this kind of mode, downhole data collecting device is while having data acquisition function, also there is the function of conventional pressure break pipe, because downhole data collecting device and fracturing string join, therefore, the space of crushing test section can not additionally be taken, very little to the change of traditional hydraulic fracturing test macro, there is the advantage of easily assembling.
(2) fixed form two
For the traditional hydraulic fracturing test macro be made up of upper packer, lower packet and pressure break pipe; Make downhole data collecting device replace pressure break pipe completely, that is: be directly fixed between upper packer and lower packet by downhole data collecting device, that is: downhole data collecting device comprises upper shell 101 and lower house 102; The top of upper shell 101 is fixedly connected with the bottom surface of upper packer, such as, thread connecting mode can be adopted to be fixedly connected with; The bottom of lower house 102 is fixedly connected with the end face of lower packet, such as, thread connecting mode can be adopted to be fixedly connected with.This kind of fixed form, because downhole data collecting device is directly fixed between upper packer and lower packet, therefore, except having hydraulic pressure acquisition function, downhole data collecting device also has the effect supporting upper lower packet simultaneously, realizes the function of conventional pressure break pipe, therefore, additionally can not take the space of crushing test section, very little to the change of traditional hydraulic fracturing test macro, there is the advantage of easily assembling.
In sum, the hydraulic fracturing that provides of the utility model measures the downhole data collecting device of terrestrial stress and acquisition system has the following advantages:
(1) directly can gather the hydraulic pressure of crushing test section, therefore, not need the hydraulic pressure value to downhole data collecting device 100 collects to revise, both improve the precision of geostress survey result, also simplified the complexity of terrestrial stress computation process;
(2) little to the transformation of existing hydraulic fracturing geostress survey system, additionally can not take the space of crushing test section, there is structure and simply, easily install and use and the advantage of long working life.
The above is only preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should look protection domain of the present utility model.
Claims (10)
1. the downhole data collecting device of a hydraulic fracturing measurement terrestrial stress, it is characterized in that, described downhole data collecting device (100) comprising: upper shell (101), lower house (102), pressure acquisition sensor (103) and circuit board (104);
Wherein, the crossing edge of described upper shell (101) and described lower house (102) is for being tightly connected; Described upper shell (101) has the first cavity (106), and, the shell wall of described upper shell (101) offers several osculums (105) be communicated with described first cavity (106), and the water under high pressure being injected into described first cavity (106) is discharged in crushing test section by described osculum (105);
Packed second cavity (107) of described lower house (102) tool, described pressure acquisition sensor (103) and described circuit board (104) are all fixed in described second cavity (107);
In addition, between described first cavity (106) and described second cavity (107), be provided with through hole, by described through hole, be communicated with described first cavity (106) and described second cavity (107); Probe and the described through hole of described pressure acquisition sensor (103) are tightly connected, and, described probe is positioned at the bottom of first cavity (106) of described upper shell (101), described probe is directly gathered be injected into the force value of the water of described first cavity (106).
2. hydraulic fracturing according to claim 1 measures the downhole data collecting device of terrestrial stress, and it is characterized in that, described upper shell (101) and described lower house (102) mode of being threaded connection are tightly connected.
3. hydraulic fracturing according to claim 1 measures the downhole data collecting device of terrestrial stress, and it is characterized in that, described through hole has internal thread; The probe of described pressure acquisition sensor (103) is provided with the external thread with described inside screw adaptation; The probe of described pressure acquisition sensor (103) is threaded connection mode and described through hole is tightly connected.
4. hydraulic fracturing according to claim 1 measures the downhole data collecting device of terrestrial stress, and it is characterized in that, described circuit board (104) comprising: input interface, data acquisition circuit, data-carrier store and power supply; One end of described input interface is electrically connected with described pressure acquisition sensor (103), and the other end of described input interface is connected with the input end of described data acquisition circuit, and the output terminal of described data acquisition circuit is connected with described data-carrier store; Described power supply is electrically connected with described input interface, described data acquisition circuit, described data-carrier store and described pressure acquisition sensor (103) respectively.
5. hydraulic fracturing according to claim 4 measures the downhole data collecting device of terrestrial stress, and it is characterized in that, described data acquisition circuit comprises the pre-amplification circuit, low-pass filter circuit and the high-pass filtering circuit that are connected in series.
6. hydraulic fracturing according to claim 4 measures the downhole data collecting device of terrestrial stress, and it is characterized in that, described circuit board also comprises output interface; Described output interface is connected with described data-carrier store.
7. hydraulic fracturing according to claim 6 measures the downhole data collecting device of terrestrial stress, and it is characterized in that, described output interface is USB interface or RS232 interface.
8. a downhole data acquisition system, is characterized in that, the hydraulic fracturing comprised described in any one of claim 1-7 measures the downhole data collecting device of terrestrial stress, also comprises upper packer, lower packet and pressure break pipe; Described downhole data collecting device comprises upper shell (101) and lower house (102);
The top of described pressure break pipe is fixedly connected with the bottom surface of described upper packer, the bottom of described pressure break pipe is fixedly connected with the top of described upper shell (101), and the bottom of described lower house (102) is fixedly connected with the end face of described lower packet.
9. a downhole data acquisition system, is characterized in that, the hydraulic fracturing comprised described in any one of claim 1-7 measures the downhole data collecting device of terrestrial stress, also comprises upper packer and lower packet; Described downhole data collecting device comprises upper shell (101) and lower house (102);
The top of described upper shell (101) is fixedly connected with the bottom surface of described upper packer, and the bottom of described lower house (102) is fixedly connected with the end face of described lower packet.
10. downhole data acquisition system according to claim 9, it is characterized in that, the top of described upper shell (101) is fixedly connected with the underrun thread connecting mode of described upper packer, and the bottom of described lower house (102) is threaded connection mode with the end face of described lower packet and is fixedly connected with.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105758561A (en) * | 2016-04-05 | 2016-07-13 | 中国矿业大学 | Visual uniformly-distributed hydraulic fracturing ground stress measurement device and measurement method |
| CN107469439A (en) * | 2017-08-31 | 2017-12-15 | 中国地质科学院地质力学研究所 | Sectionally assembled Hydraulic Fracturing Stress Measurements filter |
| CN108680428A (en) * | 2018-07-25 | 2018-10-19 | 中国地震局地壳应力研究所 | Minor diameter rock mass hydrofracturing tests double loop mounting rod |
| CN108798660A (en) * | 2018-06-08 | 2018-11-13 | 河北工程大学 | Hydraulic fracturing stress measurement device |
| CN108999586A (en) * | 2018-08-10 | 2018-12-14 | 中国地震局地壳应力研究所 | Minor diameter rock mass hydrofracturing tests straddle packer |
| CN109403964A (en) * | 2018-12-26 | 2019-03-01 | 中国地震局地壳应力研究所 | A kind of water pressure supporing system and method suitable for artesian water stratum |
| CN109469479A (en) * | 2018-11-30 | 2019-03-15 | 天地科技股份有限公司 | Water pressure supporing system and method |
| CN110005403A (en) * | 2019-05-21 | 2019-07-12 | 中国地震局地壳应力研究所 | A kind of hydraulic pressure system splits the wireless automatic well test system of In-situ stress measurements |
| CN111175125A (en) * | 2020-01-17 | 2020-05-19 | 安徽理工大学 | Coal rock tensile strength cracking experiment probe and assembly method |
| CN113431560A (en) * | 2021-07-09 | 2021-09-24 | 中国地质科学院地质力学研究所 | Equal-path double-channel fracturing device suitable for hydrofracturing ground stress measurement |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758561A (en) * | 2016-04-05 | 2016-07-13 | 中国矿业大学 | Visual uniformly-distributed hydraulic fracturing ground stress measurement device and measurement method |
| CN107469439A (en) * | 2017-08-31 | 2017-12-15 | 中国地质科学院地质力学研究所 | Sectionally assembled Hydraulic Fracturing Stress Measurements filter |
| CN107469439B (en) * | 2017-08-31 | 2018-11-09 | 中国地质科学院地质力学研究所 | Sectionally assembled Hydraulic Fracturing Stress Measurements filter |
| CN108798660A (en) * | 2018-06-08 | 2018-11-13 | 河北工程大学 | Hydraulic fracturing stress measurement device |
| CN108680428A (en) * | 2018-07-25 | 2018-10-19 | 中国地震局地壳应力研究所 | Minor diameter rock mass hydrofracturing tests double loop mounting rod |
| CN108680428B (en) * | 2018-07-25 | 2023-10-10 | 应急管理部国家自然灾害防治研究院 | Double-loop installation rod for small-diameter rock mass hydraulic fracturing test |
| CN108999586A (en) * | 2018-08-10 | 2018-12-14 | 中国地震局地壳应力研究所 | Minor diameter rock mass hydrofracturing tests straddle packer |
| CN109469479A (en) * | 2018-11-30 | 2019-03-15 | 天地科技股份有限公司 | Water pressure supporing system and method |
| CN109403964A (en) * | 2018-12-26 | 2019-03-01 | 中国地震局地壳应力研究所 | A kind of water pressure supporing system and method suitable for artesian water stratum |
| CN110005403A (en) * | 2019-05-21 | 2019-07-12 | 中国地震局地壳应力研究所 | A kind of hydraulic pressure system splits the wireless automatic well test system of In-situ stress measurements |
| CN111175125A (en) * | 2020-01-17 | 2020-05-19 | 安徽理工大学 | Coal rock tensile strength cracking experiment probe and assembly method |
| CN113431560A (en) * | 2021-07-09 | 2021-09-24 | 中国地质科学院地质力学研究所 | Equal-path double-channel fracturing device suitable for hydrofracturing ground stress measurement |
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Address after: No.1 anningzhuang Road, Haidian District, Beijing Patentee after: National natural disaster prevention and Control Research Institute, Ministry of emergency management Address before: 100085 Beijing, Haidian District, Xisanqi Patentee before: THE INSTITUTE OF CRUSTAL DYNAMICS, CHINA EARTHQUAKE ADMINISTRATION |