Well surveying method

FIELD: oil and gas industry.

SUBSTANCE: method involves thermometry and gamma logging of a well with recording of a background value of natural radioactivity of rocks and background distribution of temperature along the well shaft, a disturbing action, repeated telemetry and gamma logging with recording of values and data of a flow meter, and comparison of data. Thermometry and gamma logging is performed via inter-tube space of the well; the disturbing action is taken by reduction of liquid level in the well by pumping of inert gas to the inter-tube space at the pressure not exceeding maximum allowable pressure on a production string, with displacement of liquid to a tubing string through valves of a rod well pump and then to a discharge line by excess pressure bleeding-off to atmospheric pressure. At repeated performance of thermometry and gamma logging, a geophysical instrument is lifted by 50-100 m higher than the roof of upper perforation interval at the speed of 180-200 m/h with simultaneous recording of a liquid flow rate with a borehole thermoconductive flow meter, intensity of gamma emission of rocks and temperature; after the above instrument passes the distance of 50-100 m above the roof of upper perforation interval, recording is performed only with a thermometer at the speed of 400-600 m/h; when temperature anomalies are found out, which differ from temperature values at test recording via the well shaft, the data of intervals is specified and detailed by performing complex recording using the borehole thermoconductive flow meter and a mechanical flow meter at the speed of 180-200 m/h with measurement of 30-40 points at the investigated interval; after recording via the whole well shaft is completed, repeated lowering of the instrument, repeated temperature recording is performed; complex recording is performed using the borehole thermoconductive flow meter and the mechanical flow meter with measurement of 30-40 points; after the borehole working face is reached, the geophysical instrument is lifted, during which the same records are taken with a thermometer, the borehole thermoconductive flow meter and the mechanical flow meter as at the repeated lowering operation.

EFFECT: surveying of a production well with a lowered non-operating bottom-hole pump.

 

The invention relates to the oil industry and can be used during well operation.

There is a method of well testing, which includes the descent into the well on wireline thermometer with fixed above thermometer on wireline electrical heater, uniform heating along the length of the wellbore during lifting and simultaneous registration of thermograms in the wellbore. Thus the descent of thermometer with a heater carried out inside tubing with waterproof Shoe, previously down below interval filter at 3-5 m, with jet pump, mounted on the tubing above the perforated interval of 5-10 m, is injected into the tubing, the fluid and pumped from the annulus a mixture of working and produced fluid, register thermogram in the perforation interval and at a temperature in the range of perforations define the profile of the fluid flowing in the wellbore (RF Patent No. 2194855, publ. 20.12.2002).

The closest to the proposed invention the technical essence is a way of well testing, according to which the well will be equipped with a column tubing with a funnel at the lower end. Shoe of the column tubing is placed above the roof spacing the perforations 10-30 m Before conducting the research, conduct the operation of wells with pumping the working agent used in the development of oil deposits on the tubing tubes for 3 or more days. Stop the well. Conduct technology exposure for 1-2 days. Spend thermometry and gamma-ray logging of the well on the tubing pipes with record background values of natural radioactivity of the rocks and the background temperature distribution in the wellbore. Download the first disturbing amount of water in the reservoir through the column tubing or annulus. When pumping disturbing amount of water repeatedly move the devices from the borehole bottom to the interval set at 40-60 m above the Shoe of the column tubing, at different speeds and record the readings of the flow meter. Download stop and re thermometry well from the bottom to the mouth to record the current temperature distribution in the wellbore. After re-thermometry resume water injection and water injection lift devices to the wellhead with the registration of the readings of thermometer and flow meter. Download the second disturbing amount and write thermograms injection around the wellbore after 5-10 minutes after stopping. On the Les injection of the second disturbing amount of water and thermometry down the devices in the interval of the reservoir, download the third disturbing amount of water with simultaneous carrying out at least one measurement of temperature in the interval of the productive formation and after stopping the injection of the third disturbing amount spend thermometry with the removal of at least two images in the productive interval of the formation from the bottom and 50 m above the productive formation to determine annulus circulation. Analyze the data. After analysis of the received information to perform the drill-temperature measurements on the section of the wellbore with the detected temperature anomalies. In the detected intervals are conducting additional studies to confirm or refute the presence of temperature anomalies, to Refine the intervals of temperature anomalies. To determine the intervals of the wellbore in which there is a horizontal movement of groundwater is additionally pumped disturbing amount of water, stop the injection and produce thermometry in the range from wellhead to the interval that overlaps the zone of active groundwater movement through 5-10 min, 30 min, 60 min and 3 hours after the cessation of injection. In the case of temperature anomalies research done. In the absence of temperature anomalies continue to hold the temperature until the temperature of the water in the barrel squag the us, equal to the temperature of the surrounding materials (Patent RF №2384698, publ. 20.03.2010 - prototype).

The General disadvantages of the known methods is the inability to survey wells in the annular space with a lowered inoperative sucker rod pumps.

In the proposed invention solves the problem of the study of the production well with a lowered inoperative sucker rod pumps.

The task is solved in that in the method of the study wells, including thermometry and gamma-ray logging of a borehole with a record background values of natural radioactivity of the rocks and the background temperature distribution in the wellbore, the disturbance, re-thermometry and gamma logs and record values and data flow, comparison data, according to the invention thermometry and gamma logging is carried through the annular space of the well, the disturbance perform the reduction of the liquid level in the well by pumping inert gas into the annulus at a pressure not exceeding the maximum allowable pressure in the production casing, with the displacement of fluid in the tubing pipes through the valve sucker rod pump and forth in the flow line, a drain excess pressure to the atmosphere, when re is holding thermometry and gamma logging produce lift geophysical instrument at 50-100 m above the roof top of the perforated interval with the speed of 180-200 m/h with simultaneous recording of fluid flow downhole thermoconductive debitoren, the intensity of gamma radiation of rocks and temperature, after passing through the device at 50-100 m above the roof top of perforation interval record only thermometer with a speed of 400-600 m/h, the detection temperature anomalies, which differs from the temperature values at the control account in the wellbore, produce more detail of these intervals by conducting a comprehensive record of borehole thermoconductive debitoren and mechanical debitoren speeds of 180-200 m/h by measuring 30-40 points in the studied interval, after carrying out recording around the wellbore, a second descent of the device, re-entry temperatures, produce a comprehensive record of borehole thermoconductive debitoren and mechanical debitoren by measuring 30-40 points, after goodenia to downhole geophysical instrument raise, and spend the same recording thermometer, well thermoconductive debitoren and mechanical debitoren that when you descend.

The invention

Information about the technical condition of casing and the formations is necessary to monitor the development of the field. However, geophysical research production wells in the annular space with a lowered inoperative rod gubernamental complicated by the inability to create a depression on the layer.

A large number of producing wells with broken sucker rod pumps are in an inactive Fund. For translation of the wells in this category in the current Fund (if bypassed oil reserves) require underground or repair. However, to make the right decision about the feasibility of repair and making effective geological and technical measures often require GIW, giving the necessary information about the technical condition of the production casing and the formation. As a rule, are used for this purpose methods of thermometry, mechanical stated and thermoconductive stated.

The complexity of geophysical research wells in the annular space and obtain reliable results is to create a depression on the layer (a lower liquid level in the annulus), when the well is lowered inoperative sucker rod pump, now to research this category wells are planned underground or repair. For economy of material and labor resources is proposed a method of geophysical research production wells with an inoperable rod depth is different pumps without approach brigade groundwater or well workover. The essence of this method consists in carrying out of geophysical research wells in the annular space with the use of mobile nitrogen compressor stations TGA-10/251 or SD/251 to generate the desired depression in the reservoir. The result of using this method of geophysical research production wells with broken sucker rod pumps is to obtain the necessary information about the technical condition of the production casing and the formations that will allow you to make the right decision about the feasibility of repair and preparing effective geological and technical measures.

The method is performed as follows.

1. Tripping operations are performed in the annular space (annular gap between the inner wall of the production string with a diameter of 146 mm and 168 mm and the column tubing with a diameter of 73 mm) through the hole in the eccentric plate wellhead equipment for the production well.

2. Descent geophysical multi-function device OWL-C3-28T-60 in combination with a digital flow meter turbine OWL-NWRC-28 (diameter 28 mm, overall length 2070 mm) implement triple-core logging cable KG3-3-60-200-MF E01 (diameter of 10.2 mm) to the bottom hole with a speed of 400-600 m/H. Assigning a lower speed significantly tighten about the ECC study well, assigning a higher speed leads to a loss of precision definitions.

During the descent of the geophysical instrument to control (background) record temperature resistance thermometer in the wellbore to assess the technical condition of the production string, and write the natural gamma radiation of rocks (integral gamma-ray logging) to bind to the obtained geophysical data to depth.

3. After controlling temperature recording carry out the reduction of the liquid level in the well (creating a depression on the formation by injection of inert gas (nitrogen) in the annulus mobile nitrogen compressor stations TGA-10/251 or ATS-10/251 at a pressure not exceeding the maximum permissible pressure in the production casing.

4. The fluid in the wellbore is displaced by an inert gas (nitrogen) in the column tubing through the valve sucker rod pump and forth in the flow line and pipeline (gutter capacity, tank).

5. After lowering the liquid level in the annular space of the well (creating a depression on the layer) conduct drain the excess pressure to atmosphere.

6. Produce lift geophysical instrument at 50-100 m above the roof top of the perforated interval with the speed of 180-200 m/h with simultaneous recording of flow rate (flow rate) of SLE is innym thermoconductive debitoren, the intensity of gamma radiation of rocks and temperature resistance thermometer for detecting intervals of the tributaries of the reservoir and/or violations of the production string, as well as to highlight intervals cross-flows, i.e. sources of irrigation. Interval velocities determined on the basis of obtaining the necessary definitions. The interval of the rise of the logging tool at 50-100 m due to the fact that when lifting less than 50 m detection of violations is problematic, and more than 100 m is irrational.

After passing through the device at 50-100 m above the roof top of perforation interval spending account only resistance thermometer with a speed of 400-600 m/H. Assigning a lower speed significantly delays the process of well testing, assigning a higher speed leads to a loss of precision definitions. When the detection temperature anomalies, which differs from the temperature values at the control account in the wellbore, produce more detail data intervals inflow (sources of water) by conducting a comprehensive record of borehole thermoconductive debitoren and mechanical debitoren speeds of 180-200 m/h For the detail of the detected interval measuring mechanical debitoren 30-40 points in the studied interval. The choice of the number of points determined are required is m and sufficient to drill interval. After carrying out recording around the wellbore, a second descent geophysical instrument.

7. During the descent, a re-entry temperature resistance thermometer for identifying intervals tributaries of violations of the production casing and/or from the reservoir, and also to highlight intervals cross-flows. If inflows and/or outflows thermometer registers changes of temperature values compared to the control (background) account, i.e. temperature anomalies arising in the process of butterfly effect. The temperature difference between the re-records relative to the control record indicates the presence of tributaries, flows from this reservoir interval and/or the place of infringement of the production string. To confirm and Refine the intervals inflow produce a comprehensive record of borehole thermoconductive debitoren and mechanical debitoren. Measuring mechanical debitoren is at least 30 points.

8. After goodenia to downhole geophysical instrument raise, and spend the same recording thermometer, well thermoconductive debitoren and mechanical debitoren that when you descend, i.e. allocate and specify the intervals of inflows and outflows. Compare curves and identify deviations in temperature and Alicia flow. On the basis of the results of studies on the technical condition of the production casing and the formations make a decision about the appropriateness of underground or overhaul, and to plan effective geological and technical measures for carrying out waterproofing works and repair and insulation works to enter the well from idle and more oil production.

Specific example

Doing research in the oil wells that discover the producing formation at a depth of 1747-1759 feet Well cased production column with a diameter of 168 mm, the hole on the column pump compressori pipes with a diameter of 73 mm suspended sucker rod pump failed. The well was in operation for 52 years. Well probable violation of the production string, a possible behind-the-casing flows. To ascertain whether the repair work is expected to assess the presence of violations of the production string and the presence of cross-flows. To do this, hold tripping operation of underlying instruments in the annular space of the well. Use of geophysical multifunctional device OWL-C3-28T-60 in combination with a digital flow meter turbine OWL-NWRC-28. The devices put on three-core logging cable KG3-3-60-MF E01 to the borehole bottom. When the shutter support the rate of descent within 400-600 m/h In the downhill logging tool to control (background) record temperature resistance thermometer in the wellbore to assess the technical condition of the production string, and write the natural gamma radiation of rocks (integral gamma-ray logging) to bind to the obtained geophysical data to depth. After controlling temperature recording carry out the reduction of the liquid level in the well by pumping nitrogen into the tube space of mobile nitrogen compressor stations TGA-10/251 at a pressure equal to 9 MPa. The fluid in the wellbore is displaced by nitrogen in the column tubing through the valve sucker rod pump and forth in the flow line and channel capacity. After lowering the liquid level in the annular space of the borehole up to 710 m from the mouth of conduct drain the excess pressure to atmosphere. Produce lift geophysical instrument at 75 m above the roof top of perforation interval (studies have shown that the result does not change in the range from 50 to 100 m) with speed supported within 180-200 m/h, with simultaneous recording of flow rate (flow rate) of the downhole thermoconductive debitoren, the intensity of gamma radiation of rocks and the temperature of thermometer resistance, good discharge performance is I to identify intervals of the tributaries of the reservoir and/or violations of the production string, and also for selecting intervals cross-flows, i.e. sources of irrigation. After passing through the device at 75 m above the roof top of perforation interval spending account only resistance thermometer with speed supported within 400-600 m/h

Identify temperature anomalies in the depth intervals 1747-1750 m Produce more detail data of inflow intervals by conducting a comprehensive record of borehole thermoconductive debitoren and mechanical debitoren speed supported within 180-200 m/h For the detail of the detected interval measuring mechanical debitoren be at least 30 points in the studied intervals. After carrying out recording around the wellbore, a second descent geophysical instrument. During the descent, a re-entry temperature resistance thermometer for identifying intervals tributaries of violations of the production casing and/or from the reservoir, and also to highlight intervals cross-flows. thermometer registers changes of temperature values compared to the control (background) account, i.e. temperature anomalies arising in the process of butterfly effect. The temperature difference between the re-records relative to the control record indicates the presence of tributaries, flows from this is nterval layer and/or the place of infringement of the production string. To confirm and Refine the intervals inflow produce a comprehensive record of borehole thermoconductive debitoren and mechanical debitoren. Measuring mechanical debitoren is at least 30 points. After goodenia to downhole geophysical instrument raise, and spend the same recording thermometer, well thermoconductive debitoren and mechanical debitoren that when you descend, i.e. allocate and specify the intervals of inflows and outflows.

The results of studies on the technical condition of the production casing and the formations indicate multiple disabilities and multiple behind-the-casing flows. Given that the well production rate is low and the oil reserves in the bottomhole zone of the minor, make a decision on inexpediency of carrying out underground or workover and abandonment.

The application of the proposed method will enable studies of the production well with a lowered inoperative sucker rod pumps.

The method of study of the well, including thermometry and gamma-ray logging of a borehole with a record background values of natural radioactivity of the rocks and the background temperature distribution in the wellbore, the disturbance, re-thermometry and gamma is Arata with account values and data flow, comparison of the data, characterized in that the temperature measurement and gamma logging is carried through the annular space of the well, the disturbance perform the reduction of the liquid level in the well by pumping inert gas into the annulus at a pressure not exceeding the maximum permissible pressure in the production casing, with the displacement of fluid in the string of tubing through the valve sucker rod pump and forth in the flow line, a drain excess pressure to the atmosphere, when you conduct thermometry and gamma logging produce lift geophysical instrument at 50-100 m above the roof top of the perforated interval with the speed of 180-200 m/h with simultaneous recording of fluid flow well thermoconductive debitoren, the intensity of gamma radiation of rocks and temperature, after passing through the device at 50-100 m above the roof top of perforation interval record only thermometer with a speed of 400-600 m/h, the detection temperature anomalies, which differs from the temperature values at the control account in the wellbore, produce more detail of these intervals by conducting a comprehensive record of borehole thermoconductive debitoren and mechanical debitoren speeds of 180-200 m/h by measuring 30-40 points in the studied interval, after the recording is around the wellbore, a re-release device, re-entry temperatures, produce a comprehensive record of borehole thermoconductive debitoren and mechanical debitoren by measuring 30-40 points, after goodenia to downhole geophysical instrument raise, and spend the same recording thermometer, well thermoconductive debitoren and mechanical debitoren that when you descend.



 

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EFFECT: improving efficiency of investigation and detecting leaktightness or leakiness of packer systems or cement bridge.

5 dwg

FIELD: oil and gas industry.

SUBSTANCE: method for determining the profile of fluid influx of multiformation deposits in the well involves temperature measurements in the well during the well thermal equilibrium time after the drilling process is completed; determination of temperature of fluids supplied to the well from each productive formation after perforation process is completed at the initial extraction stage. Specific flow rate for each productive formation is determined as per change rate of measured temperatures.

EFFECT: improving the efficiency.

7 cl, 10 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: device has body with ports in lower and upper ends, main sensitive elements in form of turbines and packing elements, placed in pairs at body ends, side port made in body between main sensitive elements and converter, connected to surface equipment. In side pipe, mounted inside the body between main sensitive elements, additional sensitive element is placed in form of turbine and thermal sensor. Lower end of side pipe is connected to side port. Diameter of turbine of additional sensitive element is less than diameter of turbines of main sensitive elements. Converter is a control block mounted above body including sleeves locator and electronic microprocessor device.

EFFECT: higher precision.

1 dwg

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