CN2638064Y

CN2638064Y - Rock scraps sonic wave wave speed measuring device

Info

Publication number: CN2638064Y
Application number: CN 03268815
Authority: CN
Inventors: 程远方; 邹德永; 王桂华
Original assignee: China University of Petroleum East China
Current assignee: China University of Petroleum East China
Priority date: 2003-07-09
Filing date: 2003-07-09
Publication date: 2004-09-01
Anticipated expiration: 2013-07-09

Abstract

The utility model provides a cutting sound wave speed measuring device comprising an ultrasonic testing device, a longitudinal wave probe and a transverse wave probe, a fixing compression device and a transmitting line, etc. The longitudinal wave probe and the transverse wave probe are respectively provided with a transmitting probe and a receiving probe. A base (6) is provided with two lead rails (7), a weighting block (8) is positioned on the lead rail (7) and can move upwards and downwards, two probe supports (9) are respectively arranged on the base and below the weighting block (8), the transmitting probe (3) and the receiving probe (4) are respectively positioned on the upper and the lower probe supports (9), a sound wave transmitting line (2) and an ultrasonic testing device (1) of the two probes are connected with each other, the tested cuttings (5) are positioned between the two probes. The function of the weighting block (8) is to exert certain pressure to the sound wave probe, thereby making the sound wave probe contact well with the surface of the cuttings. The wave velocity of the cuttings can be worked out by measuring the time for the sound wave running through the cuttings, thereby calculating and analyzing the information such as the physical and mechanical characteristics, the pressure characteristics and the ground stress of the underground strata, etc, and providing the necessary basic data for the exploration and development of the petroleum and natural gas and the oil and gas well engineering.

Description

Landwaste acoustic velocity measurement mechanism

Technical field: the utility model relates to a kind of formation physical property proving installation, is used in particular for measuring the subsurface rock acoustic wave propagation velocity.

Background technology: in petroleum exploration and development, formation properties is the important foundation data of petroleum natural gas exploration and Oil-Gas Well Engineering as physical and mechanical parameter, formation pore pressure, caving pressure and parting pressure, the terrestrial stress etc. of subterranean strata.At present, the technology that is used to estimate formation properties both at home and abroad can be divided into four kinds: 1. rock core test.Promptly, the rock core of representing the stratum is got on the ground, carried out a series of test and analysis by drilling and coring delivery.2. wireline logging.Promptly adopt technology such as electric logging, sound logging and radioactivity well logging, obtain the data such as resistivity, acoustic wave character, radioactivity on stratum, explain and calculate the various character on stratum in view of the above.3. on-the-spot test.Promptly in drilling process, carry out drill stem test (DST) and crushing test, directly obtain the parameter such as pore pressure, parting pressure on stratum.4. While-drilling down-hole measurement.Adopt subsurface tools such as MWD, LWD, measure the physical and mechanical parameter on stratum while creeping into.

Two kinds of technology of rock core test and well logging interpretation only just can be carried out formation evaluation under the situation that obtains rock core information and well-log information after the finishing drilling of a bite well.On-the-spot test can be carried out in drilling well midway, but because duty cycle is long, difficulty is big, expense is high, generally can only obtain the stratigraphic information of a point or several points.Though While-drilling down-hole measurement can be obtained formation information in real time, continuously, because of instrument costliness, complex process, measurement cost height, rig-site utilization is less, generally only is used for emphasis well highly difficult, that technology is special.

Summary of the invention: the purpose of this utility model is that a kind of landwaste acoustic velocity measurement mechanism will be provided, with the well drilling detritus that obtains easily, the source is sufficient as tested object, physical and mechanical parameter, pressure characteristic parameter and the terrestrial stress data of coming the quantitative Analysis subterranean strata by the acoustic velocity of measuring landwaste.

The purpose of this utility model is achieved in that landwaste acoustic velocity measurement mechanism is by supersonic reflectoscope, compressional wave and shear wave probe, fixedly pressue device, acoustic transmission line etc. are partly formed.Supersonic reflectoscope comprises acoustic pinger, sound pulse receiver and oscillograph; Each is made up of compressional wave and shear wave probe a transmitting probe and a receiving transducer; Fixedly pressue device partly is made up of base, guide rail, weight, probe bearing etc., is used for supporting, fixing and set upright sonic probe, apply certain pressure to sonic probe, and it is contacted well with the landwaste surface.

This method is not subjected to the restriction of rock core and well-log information, has remedied the deficiency of existing method, and can estimate the character of subterranean strata according to the landwaste acoustic wave character in real time, continuously, it is simple to have instrument, easy to carry, expense is cheap, and is simple to operation, the measuring accuracy advantages of higher.

Description of drawings: Fig. 1 is the structural representation of the landwaste acoustic velocity measurement mechanism that proposes according to the utility model.

Among the figure, the 1-supersonic reflectoscope, the 2-acoustic transmission line, the 3-transmitting probe, the 4-receiving transducer, 5-landwaste to be measured, 6-base, 7-guide rail, 8-increase the weight of soon, the 9-bearing of popping one's head in.

Embodiment: describe concrete structure of the present utility model in detail below in conjunction with accompanying drawing.

As shown in Figure 1, landwaste acoustic velocity proving installation is by supersonic reflectoscope 1, compressional wave and shear wave probe, fixedly pressue device, acoustic transmission line 2 etc. are partly formed.

Supersonic reflectoscope 1 is made up of acoustic pinger, sound pulse receiver and oscillograph.Transmitter is used to produce sound wave pulse, and the sound wave receiving instrument is used to detect sound wave pulse, and display is used to show acoustic waveform and data.

Each is made up of compressional wave and shear wave probe a transmitting probe 3 and a receiving transducer 4.Transmitting probe 3 is to landwaste 5 emission sound waves, and receiving transducer 4 receives the sound wave that sees through landwaste.Longitudinal wave probe is used to measure the velocity of longitudinal wave of landwaste, shear wave probe is used to measure landwaste and shear wave velocity.

Fixedly pressue device partly is made up of base 6, guide rail 7, weight 8, probe bearing 9 etc.Two guide rails 7 are installed on base 6, weight 8 is contained on the guide rail 7 and can moves up and down, on base 6 and below the weight 8, respectively adorn a probe bearing 9, transmitting probe 3 and receiving transducer 4 are contained in respectively up and down on two probe bearings 9, two probes respectively have acoustic transmission line 2 to be connected with supersonic reflectoscope 1, and tested landwaste 5 places between two probes.The effect of weight 8 is to apply certain pressure to sonic probe, makes it contact good with the landwaste surface.During measurement, place landwaste 5 between two probes 3 and 4 and compress, transmitting probe 3 emission ultrasound waves, ultrasound wave is through behind the landwaste 5, be received probe 4 and receive, the oscillograph display waveform by supersonic reflectoscope 1 also reads sound wave and sees through the used time of landwaste 5.Can calculate the acoustic velocity of this rock sample according to the thickness of landwaste and time of recording, that is:

V = \frac{H}{T}

In the formula: V-landwaste velocity of wave, m/s; H-landwaste average thickness, m; The T-sound wave penetrates used time of landwaste, s.

The method of testing and the step of landwaste velocity of wave are as follows:

1. rock sample is prepared.Choose 5～6 of representational landwaste, clean, dry, grind two sections that are parallel to each other then.Measure and write down the thickness of rock sample.For guaranteeing accuracy of test, rock sample thickness is preferably in more than 1 millimeter, and the diameter of landwaste is more than 3 millimeters.

2. time measurement.Landwaste is placed between two probes, be coupled with the surface of contact of couplant, and apply certain pressure, guarantee that probe has good the contact with landwaste rock sample and probe.The record travel-time of ultrasound wave in rock sample.For the less rock sample of thickness, can between rock sample and probe, add the time delay piece of a standard, to improve measuring accuracy.

3. velocity of wave calculates.Calculate the velocity of wave of every rock sample by above-mentioned formula.By statistical results show to test findings, though landwaste velocity of wave data have certain dispersiveness, overall Normal Distribution, therefore desirable arithmetic mean is as the typical value on research stratum.

This proving installation is mainly used in the on-the-spot longitudinal and transverse wave velocity of measuring well drilling detritus in real time of petroleum drilling.Use related software and can be the exploratory development and the Oil-Gas Well Engineering raising necessary base data of petroleum gas with the information such as physico mechanical characteristic, pressure characteristic and terrestrial stress of boring the real-time calculation and analysis subterranean strata.This appliance arrangement is simple, and volume is little, and is easy to carry, is convenient to rig-site utilization.Can obtain formation information with boring real-time continuous, easy and simple to handle, the measuring accuracy height, testing expense is low.

Claims

1. landwaste acoustic velocity measurement mechanism, by supersonic reflectoscope, compressional wave and shear wave probe, fixing pressue device, compositions such as acoustic transmission line, supersonic reflectoscope comprises acoustic pinger, sound pulse receiver and oscillograph, each is made up of compressional wave and shear wave probe a transmitting probe and a receiving transducer, it is characterized in that, go up installation two guide rails (7) at base (6), weight (8) is contained on the guide rail (7) and can moves up and down, on base (6) and weight (8) below respectively adorn a probe bearing (9), transmitting probe (3) and receiving transducer (4) are contained in respectively up and down on two probe bearings (9), two probes respectively have acoustic transmission line (2) to be connected with supersonic reflectoscope (1), and tested landwaste (5) places between two probes.