CN201041031Y - Six-arm dip logging instrument - Google Patents

The six-arm dipmeter is applied in the petroleum logging field to detect formation inclination angle and inclination direction and to research in stratigraphy. The utility model comprises an anti-rotary joint, a centralizer, a cable telemetry cartridge, an insulation cartridge and an insulation shell. An electronic device, an inclination measuring cartridge and a hydraulic swing arm are installed in the insulation shell top to down. The lower part of the hydraulic swing arm is connected with a bar system. The utility model is characterized in that the number of the bar system is six and one electrode plate is fixed at the end part of each bar system. Two electrodes are fixed side by side on each electrode plate. Each electrode is connected with the electronic device through the relative circuit in the electrode plate. The effects of the utility model are that the logging of formation inclination angle and inclination direction can be completed. Because the electrode distribution is more reasonable, the contact between the electrode plate and the side wall is better, the well logging information acquired is more, the reflection of geometric shape of hole is more sensitive, the resistivity logging quality is improved and the utility model can be used for stratigraphy research.

Technical field

The utility model relates to oil well logging neck city, particularly a kind of logger that is used for the structure on stratum, detecting shaft place.It is a kind of pushing type logging instrument of surveying pendage angle, incline direction.

Background technology

In the oil field prospecting development process, adopt dipmeter tool to measure the inclination angle and the incline direction on stratum, so that grasp the subsurface geological structure characteristics, formulate oilfield development program.

At present, external similar dipmeter tool product has: the high resolution dipmeter of U.S. Atlas company is four arms, four electrodes, hydraulic pressure pushing type, four arms, two-two linkage types.This instrument has four backup arms, be equipped with one on each backup arm and survey pole plate, pole plate is pushed against the borehole wall during work, to survey the different resistivity of different rock-layers, teleclinometer in the instrument is measured parameters such as hole angle again, by calculating, can obtain the various information of pendage to the apparatus measures value.The six arm dipmeter of U.S. Halliburton Company, six arms, six electrodes, mechanical pushing type.Chinese patent CN 2372447Y provides a kind of oil logging tool eight arm telescoping rams, adopts driven by motor hydraulic jack inner carrier to realize the transmission of mechanism, improves the measurement category and the precision of down-hole formation dip angle signal.But because distribution of electrodes quantity and position problems, the information that obtains is insufficient, and the geometry of reflection well has much room for improvement.

Summary of the invention

The purpose of this utility model provides a kind of six arm dipmeter tools, and this instrument adopts six arms, 12 electrodes, hydraulic sidewall contact device, six arm single action types.Can finish the well logging of stratigraphic dip and incline direction, because distribution of electrodes is more reasonable, pole plate contacts with the borehole wall better, and the well logging information of acquisition is more, and the geometry of reflection well is more sensitive, improves the resistivity logging quality.

The technical solution adopted in the utility model is: six arm dipmeter tools comprise: swirel, centralizer, cable telemetry pipe nipple, insulating short section and insulation crust, electronics, deviational survey pipe nipple and hydraulic sidewall contact device are installed in insulation crust from top to bottom, the hydraulic sidewall contact device bottom is connected with leverage, it is characterized in that: described leverage quantity is 6, each leverage end is fixed with 1 pole plate, is fixed with 2 electrodes on each pole plate side by side.Each pole plate is equipped with corresponding circuit, and connects electronics.

6 leverages evenly distribute, and adjacent leverage center is mutually 60 ° of angles, six arm single actions.Six arm single actions be six arms respectively under the drive of hydraulic sidewall contact device, can be movable separately.

The lateral surface of described pole plate is a cabochon, studs with 2 electrodes on each pole plate, and 6 electrode plate structures are identical, interchangeable.

The pole plate of installing on the leverage is counted clockwise from No. 1 pole plate, and two electrodes numberings on No. 1 pole plate are respectively 1,1A, and two electrodes numberings on No. 2 pole plates are respectively 2,2A, two electrodes numberings on No. 3 pole plates are respectively 3,3A, and the like to 4,4A, 5,5A, 5,6A.

The beneficial effects of the utility model: six arm dipmeter tools can write down 23 logs, and handling through special-purpose software to provide stratigraphic dip and incline direction.Because distribution of electrodes is more reasonable, pole plate contacts with the borehole wall better, and the well logging information of acquisition is more, and the geometry of reflection well is more sensitive.If certain 1 or 2 electrode signals lost efficacy, can not influence the accuracy of explanation results, improved the resistivity logging quality.

Description of drawings

Fig. 1 is the utility model six arm dipmeter tool structural representations.

Fig. 2 is the distribution of electrodes structural representation on 6 pole plates of the utility model six arm dipmeter tools, is the vertical view of Fig. 1.

Among the figure, 1. swirel, 2. centralizer, 3. cable telemetry pipe nipple, 4. electronics, 5. deviational survey pipe nipple, 6. hydraulic sidewall contact device, 7. leverage, 8. pole plate, 9. insulating short section, 10. insulation crust.

The specific embodiment

In conjunction with instrument block diagram accompanying drawing the utility model basic principle is further described.

Ground control system transmits order by cable telemetry for this instrument, passes under the order control at underground, and instrument clock system and flogic system sequential are in accordance with regulations moved under the instruction of this instrument control module.

12 road microfocus conductivity signals (D1-D6A) of 12 electrode collections are after this electronics electrical conductivity pretreatment module is handled, send the electrical conductivity multiplexing to carry out layout, again after the variable gain amplification and skew via ground system control, together with three accelerometer signal, as fast road signal, deliver to the multiplexing of fast road.The do not say or talk signal comprises: KDB signal, three magnetometer signals, six hole diameter signals, pressure signal, DC EMEX signal., after do not say or talk multiplexing layout, deliver to fast road multiplexer and carry out formatting with super do not say or talk signal with fast road signal.Super do not say or talk signal comprises: temperature signal, positive-negative power signal, and other control and monitor signal.The analog signals of fast road multiplexing output becomes digital quantity after mould/number conversion, do relevant change and DTB and photoisolator circuit are delivered in control by this instrument control module circuit, is sent to the cable telemetry pipe nipple by three buses, is transferred to ground.

The EMEXDC power supply of focus circuit by cable, is conducted to the EMEX oscillator through the power transformer centre cap, under the control of this instrument control module circuit, produces single-revolution 5KHz EMEXAC and transmits, and the power supply conductance is measured and used.

" pushing away " " receipts " of hydraulic sidewall contact device are by the send instructions motor operations of this instrument control module control relay, relay control hydraulic pressure hydraulic sidewall contact device of underground.