Liquid production profile testing tubular column and method

Abstract

The invention relates to the technical field of oil and gas well oil testing and production testing, in particular to a liquid production profile testing tubular column and method.The oil and gas well oil testing and production testing tubular column comprises a first continuous oil pipe, a first production and profile logging instrument, a second continuous oil pipe and a second production and profile logging instrument which are sequentially connected together from top to bottom, and a depth counter is installed at the upper end of the first continuous oil pipe; a centralizer is mounted on the outer side of the middle of the second coiled tubing; the method comprises the following steps: step 1, calibrating the relationship between a depth counter and the well depth; and 2, according to the minimum spacing D of the perforation clusters and the thickness H of the perforation clusters, assembling a liquid production profile test tubular column. The device is reasonable and compact in structure, can accurately test the fluid production contribution rate of each perforation cluster of the horizontal well, solves the problems of abnormal turbine revolution caused by non-uniform dragging of the coiled tubing and large test result deviation caused by breaking of the oil-gas-water distribution state in a sleeve by dragging of the coiled tubing, and can further understand the reservoir stratum and improve the test efficiency. And a reference basis is provided for optimization of a fracturing transformation scheme.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas well oil testing and production testing, and relates to a production liquid profile testing pipe string and a method. Background Art

[0002] With the continuous deepening of oil and gas exploration and development, low-permeability oil and gas reservoirs have gradually become the focus of fracturing, and large-scale staged fracturing of horizontal wells has become the main technology for increasing production. However, due to the strong heterogeneity of the reservoir, the production capacity after fracturing varies greatly. It is urgent to conduct liquid production profile tests on horizontal wells after fracturing to understand the production capacity of each section and cluster, which provides an important basis for understanding the sweet spots of the reservoir and optimizing the fracturing transformation plan.

[0003] The production profile test technology of horizontal wells mainly includes crawler + production profile test instrument, continuous tubing + production profile test instrument and fiber-optic continuous tubing test technology. For the production profile test of long horizontal sections and oil and water wells, the continuous tubing + production profile tester test technology has obvious advantages. When testing the continuous tubing + production profile tester, first connect the continuous tubing to the production profile test instrument and lower it to the end of the horizontal section, then pull the continuous tubing up and drag it at a uniform speed. Through the turbine, optical probe, density and water holding instrument distributed along the casing cross-section array on the production profile instrument, the oil, water and gas distribution and flow rate at different positions in the casing are monitored. In order to reduce the monitoring error, 3-4 trips of different dragging speeds are generally carried out for monitoring, and the production profile results are obtained through comparative analysis and interpretation. Due to the characteristics of the continuous tubing itself, it is difficult to achieve uniform dragging. The fluctuation of the dragging speed is easy to cause abnormal turbine speed. At the same time, when the continuous tubing is dragged in the casing, it will disturb the distribution of gas, oil and water in the upper, middle and lower parts of the casing, seriously affecting the monitoring of density, water holding and other probes, resulting in large deviations in the interpretation results. There is an urgent need for a fluid production profile testing string and method to solve the problem of inaccurate fluid production profile testing in horizontal wells. Summary of the invention

[0004] The present invention provides a liquid production profile test string and method, namely a liquid production profile test string and a liquid production profile test method, which overcome the shortcomings of the above-mentioned prior art and can effectively solve the problems of abnormal turbine speed caused by uneven dragging of the existing continuous oil tubing and large deviation in test results caused by the continuous oil tubing dragging breaking the oil, gas and water distribution state in the casing.

[0005] One of the technical solutions of the present invention is achieved through the following measures: a production profile test pipe string and method, including a first continuous oil pipe, a first production profile logging instrument, a second continuous oil pipe and a second production profile logging instrument connected together from top to bottom, a depth counter is installed at the upper end of the first continuous oil pipe, and a centralizer is installed on the outer side of the middle part of the second continuous oil pipe.

[0006] The following is a further optimization and / or improvement of one of the above-mentioned technical solutions: The first production profile logging instrument and the second production profile logging instrument can both be array probe production profile logging instruments, and the second continuous tubing is a tubing short-circuit.

[0007] The second technical solution of the present invention is achieved by the following measures: A method for testing a production liquid profile comprises the following steps: Step 1, calibrate the relationship between the depth counter and the well depth; Step 2: assemble the production profile test string according to the minimum spacing D of the perforation clusters and the thickness H of the perforation clusters, so that the length L of the second coiled tubing satisfies: H+DL≥2 meters; Step 3, adjusting the depth counter so that the upper end of the first coiled tubing corresponds to the well depth of zero meters; Step 4: lower the production profile test string into the well so that the first perforation cluster is located between the first production profile logging tool and the second production profile logging tool, then stop lowering and start testing; Step 5: After the wellhead pressure, production, and oil content reach a stable state, production is continued. When the production is greater than or equal to one time of the horizontal wellbore volume, the test of the first perforation cluster is completed; Step 6: lift the production profile test string so that the second perforation cluster is located between the first production profile logging tool and the second production profile logging tool, and then start the test, repeat the fifth step to complete the test of the second perforation cluster; Step 7, repeating step 6 to sequentially complete the testing of multiple horizontal well perforation clusters; Step 8, propose a production profile test string; Step nine, compare the first data set measured by the first production profile logging instrument at the upper, middle and lower parts of the casing with the second data set measured by the second production profile logging instrument at the upper, middle and lower parts of the casing to obtain the fluid production results of each horizontal well perforation cluster.

[0008] The following is a further optimization and / or improvement of the second technical solution of the above invention: The above step 1 includes: The first step is to clean the wellbore; The second step is to install a coupling locator at the lower end of the production profile test string to perform horizontal well logging; The third step is to calibrate the relationship between the depth counter and the well depth.

[0009] The above-mentioned step four is to lower the production profile test string into the well. When the lower end of the second production profile logging instrument reaches a position 10 to 20 meters in front of the first perforation cluster, reduce the lowering speed, and adjust the entry depth of the production profile test string into the well according to the depth of the depth counter, so that the first perforation cluster is located between the first production profile logging instrument and the second production profile logging instrument, and then stop lowering and start testing.

[0010] In the above step nine, the first data set includes the turbine speed, fluid density, water holdup, pressure, and temperature data measured by the first production profile logging instrument at the upper, middle, and lower parts of the casing respectively, and the second data set includes the turbine speed, fluid density, water holdup, pressure, and temperature data measured by the second production profile logging instrument at the upper, middle, and lower parts of the casing respectively.

[0011] In the above step nine, comparing the first data set measured by the first production and profiling logging instrument at the upper, middle and lower parts of the casing with the second data set measured by the second production and profiling logging instrument at the upper, middle and lower parts of the casing respectively includes: Compare the turbine speed, fluid density, water holdup, pressure, and temperature data measured by the first production and profiling logging instrument at the upper part of the casing with the turbine speed, fluid density, water holdup, pressure, and temperature data measured by the second production and profiling logging instrument at the upper part of the casing; The turbine speed, fluid density, water holdup, pressure, and temperature data measured by the first production and profiling logging instrument at the middle of the casing are compared with the turbine speed, fluid density, water holdup, pressure, and temperature data measured by the second production and profiling logging instrument at the middle of the casing; The turbine speed, fluid density, water holdup, pressure and temperature data measured by the first production and profiling logging instrument at the lower part of the casing are compared with the turbine speed, fluid density, water holdup, pressure and temperature data measured by the second production and profiling logging instrument at the lower part of the casing.

[0012] The present invention has a reasonable and compact structure and is easy to use. It can accurately test the contribution rate of the liquid production of each perforation cluster in the horizontal well, solve the problem that the uneven speed of the continuous tubing dragging causes the abnormal turbine speed, and the continuous tubing dragging breaks the oil, gas and water distribution state in the casing, resulting in large deviations in the test results. It can further understand the reservoir and provide a reference basis for optimizing the fracturing transformation plan. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Attached Figure 1 This is a schematic diagram of the main structure of Example 1 when in use.

[0014] The codes in the attached drawings are: 1 is the first continuous tubing, 2 is the first production profile logging instrument, 3 is the second continuous tubing, 4 is the second production profile logging instrument, 5 is the centralizer, and 6 is the depth counter. DETAILED DESCRIPTION

[0015] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0016] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached Figure 1The positional relationships such as front, back, top, bottom, left, and right are described according to the layout directions of the drawings in the specification.

[0017] The present invention will be further described below in conjunction with embodiments and drawings: Embodiment 1: As shown in the attached Figure 1 As shown, the production profile test string includes a first continuous oil pipe 1, a first production profile logging instrument 2, a second continuous oil pipe 3 and a second production profile logging instrument 4 which are connected in sequence from top to bottom. A depth counter 6 is installed at the upper end of the first continuous oil pipe 1, and a centralizer 5 is installed on the outer side of the middle part of the second continuous oil pipe 3.

[0018] During use, through such a setting, the contribution rate of liquid production of each perforation cluster in the horizontal well can be accurately tested, and the problems of abnormal turbine speed caused by uneven dragging of the continuous tubing and large deviation of test results caused by the disruption of the oil, gas and water distribution state in the casing by the dragging of the continuous tubing can be solved. This can further understand the reservoir and provide a reference basis for the optimization of the fracturing transformation plan.

[0019] The above-mentioned production profile test string can be further optimized and / or improved according to actual needs: Embodiment 2: As an optimization of the above embodiment, as shown in the attached Figure 1 As shown, the first production profile logging instrument 2 and the second production profile logging instrument 4 are both array probe production profile logging instruments, and the second coiled tubing 3 is a tubing short circuit. During use, the array probe production profile logging instrument can collect turbine speed, fluid density, water holdup, pressure, and temperature data, which is convenient for analyzing the production results of each horizontal well perforation cluster, and the second coiled tubing 3 is convenient for replacement according to various specifications of perforation cluster spacing, which is convenient for testing each horizontal well perforation cluster.

[0020] Embodiment 3: As an optimization of the above embodiment, as shown in the attached Figure 1 As shown, the production liquid profile testing method comprises the following steps: Step 1, calibrating the relationship between the depth counter 6 and the well depth; Step 2: assemble the production profile test string according to the minimum spacing D of the perforation clusters and the thickness H of the perforation clusters, so that the length L of the second coiled tubing 3 satisfies: H+DL≥2 meters; Step 3, adjusting the depth counter 6 so that the upper end of the first coiled tubing 1 corresponds to the well depth of zero meters; Step 4: lower the production profile test string into the well so that the first perforation cluster is located between the first production profile logging instrument 2 and the second production profile logging instrument 4, then stop lowering and start testing; Step 5: After the wellhead pressure, production, and oil content reach a stable state, production is continued. When the production is greater than or equal to one time of the horizontal wellbore volume, the test of the first perforation cluster is completed; Step 6: lift the production profile test string so that the second perforation cluster is located between the first production profile logging instrument 2 and the second production profile logging instrument 4, and then start the test, repeat the fifth step to complete the test of the second perforation cluster; Step 7, repeating step 6 to sequentially complete the testing of multiple horizontal well perforation clusters; Step 8, propose a production profile test string; Step nine, compare the first data set measured by the first production and profiling logging instrument 2 at the upper, middle and lower parts of the casing with the second data set measured by the second production and profiling logging instrument 4 at the upper, middle and lower parts of the casing to obtain the fluid production results of each horizontal well perforation cluster.

[0021] Based on the turbine speed, fluid density, water holdup, pressure and temperature data of the upper, middle and lower parts of the casing measured by the first production profile logging instrument 2 and the second production profile logging instrument 4, a comparative interpretation and analysis was carried out to obtain the production situation of a single cluster. Finally, the fluid production results of each perforation cluster of the horizontal well were obtained, which can further understand the reservoir and provide a reference basis for the optimization of the fracturing transformation plan.

[0022] The above-mentioned liquid production profile test method can be further optimized and / or improved according to actual needs: Embodiment 4: As an optimization of the above embodiment, as shown in the attached Figure 1 As shown, step one includes: The first step is to clean the wellbore; The second step is to install a coupling locator at the lower end of the production profile test string to perform horizontal well logging; The third step is to calibrate the relationship between the depth counter 6 and the well depth.

[0023] This can accurately locate the position of the production profile test string in the well, making it easier to measure each perforation cluster.

[0024] Embodiment 5: As an optimization of the above embodiment, as shown in the attached Figure 1 As shown, step 4 is to lower the production profile test string into the well, and when the lower end of the second production profile logging instrument 4 reaches a position 10 to 20 meters in front of the first perforation cluster, reduce the lowering speed, and adjust the depth of the production profile test string into the well according to the depth of the depth counter 6, so that the first perforation cluster is located between the first production profile logging instrument 2 and the second production profile logging instrument 4, and then stop lowering and start testing. This can prevent the production profile test string from entering the well too quickly, resulting in misalignment with the position of the perforation cluster to be tested, and can improve the test efficiency.

[0025] Embodiment 6: As an optimization of the above embodiment, as shown in the attached Figure 1As shown, in step nine, the first data set includes the turbine speed, fluid density, water holdup, pressure, and temperature data measured by the first production and profiling logging instrument 2 at the upper, middle, and lower parts of the casing, respectively, and the second data set includes the turbine speed, fluid density, water holdup, pressure, and temperature data measured by the second production and profiling logging instrument 4 at the upper, middle, and lower parts of the casing, respectively; Compare the turbine speed, fluid density, water holdup, pressure, and temperature data measured by the first production and profiling logging instrument 2 at the upper part of the casing with the turbine speed, fluid density, water holdup, pressure, and temperature data measured by the second production and profiling logging instrument 4 at the upper part of the casing; Compare the turbine speed, fluid density, water holdup, pressure, and temperature data measured by the first production and profiling logging instrument 2 at the middle of the casing with the turbine speed, fluid density, water holdup, pressure, and temperature data measured by the second production and profiling logging instrument 4 at the middle of the casing; The turbine speed, fluid density, water holdup, pressure and temperature data measured by the first production and profiling logging instrument 2 at the lower part of the casing are compared with the turbine speed, fluid density, water holdup, pressure and temperature data measured by the second production and profiling logging instrument 4 at the lower part of the casing.

[0026] The specific process of the liquid production profile testing method in this embodiment is as follows: Step 1: Horizontal well 001, with a vertical depth of 4,200 meters and a horizontal section length of 1,300 meters, was transformed by staged fracturing with perforation bridge plugs, and then the wellbore was cleaned by drilling and grinding bridge plugs with continuous tubing before the production profile test. The 6,000-meter production profile test string with gamma and CCL magnetic locators at the lower end was lowered to the bottom of the artificial well, and then the gamma and CCL magnetic locators were taken out to check the relationship between the depth counter 6 and the well depth; Step 2: The minimum spacing of the perforation clusters in Well 001 is 10 meters, the thickness of the perforation clusters is 1 meter, and the length of the second coiled tubing 3 is determined to be 8 meters; Step 3, adjusting the depth counter 6 so that the upper end of the first coiled tubing 1 corresponds to the well depth of zero meters; Step 4: Run the production profile test string into the well. The first perforation cluster at the toe of Well 001 is 5490 to 5491 meters. When the production profile test string is lowered to 5480 meters, reduce the lowering speed of the production profile test string to 3 meters / minute. When the depth counter 6 shows 5494 meters, stop lowering and start the production profile test. Step 5: After 4 hours of production at Well 001, the wellhead pressure, production, and oil content are stable. The wellbore volume of the horizontal section of the well is 15 cubic meters. After continuing to produce 15 cubic meters, the test of the first perforation cluster is completed; Step 6: The second perforation cluster at the toe of Well 001 is 5479 to 5480 meters. The production profile test string is pulled up. When the depth counter 6 shows 5483 meters, the pulling is stopped and the test is started. After Well 001 has produced for 2 hours, the wellhead pressure, production and oil content are stable. The wellbore volume of the horizontal section of the well is 15 cubic meters. After continuing to produce 15 cubic meters, the test of the second perforation cluster is completed. Step 7, repeat step 6; Step 8: After the 23 perforation cluster tests of Well 001 are completed, the production profile test string is proposed; Step nine, based on the turbine speed, fluid density, water holdup, pressure and temperature data of the upper, middle and lower parts of the casing measured by the first production profile logging instrument 2 and the second production profile logging instrument 4, comparative interpretation and analysis are carried out to obtain the production situation of a single cluster, and finally obtain the fluid production results of each perforation cluster of the horizontal well.

[0027] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. A production profile test column, characterized in that It includes a first continuous tubing, a first production profile logging instrument, a second continuous tubing and a second production profile logging instrument connected in sequence from top to bottom. A depth counter is installed at the upper end of the first continuous tubing, and a centralizer is installed on the outer side of the middle of the second continuous tubing.

2. The production profile test column according to claim 1, characterized in that The production profile logging instruments are all array probe production profile logging instruments, and the second continuous tubing is a tubing short-circuit.

3. A method for testing a production profile using a production profile testing column according to any one of claims 1 to 2, characterized in that The steps include: Step 1, calibrate the relationship between the depth counter and the well depth; Step 2: assemble the production profile test string according to the minimum spacing D of the perforation clusters and the thickness H of the perforation clusters, so that the length L of the second coiled tubing satisfies: H+DL≥2 meters; Step 3, adjusting the depth counter so that the upper end of the first coiled tubing corresponds to the well depth of zero meters; Step 4: lower the production profile test string into the well so that the first perforation cluster is located between the first production profile logging tool and the second production profile logging tool, then stop lowering and start testing; Step 5: After the wellhead pressure, production, and oil content reach a stable state, production is continued. When the production is greater than or equal to one time of the horizontal wellbore volume, the test of the first perforation cluster is completed; Step 6: lift the production profile test string so that the second perforation cluster is located between the first production profile logging tool and the second production profile logging tool, and then start the test, repeat the fifth step to complete the test of the second perforation cluster; Step 7, repeating step 6 to sequentially complete the testing of multiple horizontal well perforation clusters; Step 8, propose a production profile test string; Step nine, compare the first data set measured by the first production profile logging instrument at the upper, middle and lower parts of the casing with the second data set measured by the second production profile logging instrument at the upper, middle and lower parts of the casing to obtain the fluid production results of each horizontal well perforation cluster.

4. The method for testing the production profile according to claim 3, characterized in that Step one includes: The first step is to clean the wellbore; The second step is to install a coupling locator at the lower end of the production profile test string to perform horizontal well logging; The third step is to calibrate the relationship between the depth counter and the well depth.

5. The method for testing the production profile according to claim 3 or 4, characterized in that Step four is to lower the production profile test string into the well. When the lower end of the second production profile logging instrument reaches a position 10 to 20 meters in front of the first perforation cluster, reduce the lowering speed, and adjust the entry depth of the production profile test string into the well according to the depth of the depth counter so that the first perforation cluster is located between the first production profile logging instrument and the second production profile logging instrument. Then stop lowering and start testing.

6. The method for testing the production profile according to claim 3 or 4, characterized in that In step nine, the first data set includes the turbine speed, fluid density, water holdup, pressure, and temperature data measured by the first production profile logging instrument at the upper, middle, and lower parts of the casing, and the second data set includes the turbine speed, fluid density, water holdup, pressure, and temperature data measured by the second production profile logging instrument at the upper, middle, and lower parts of the casing.

7. The method for testing the production profile according to claim 5, characterized in that In step nine, the first data set includes the turbine speed, fluid density, water holdup, pressure, and temperature data measured by the first production profile logging instrument at the upper, middle, and lower parts of the casing, and the second data set includes the turbine speed, fluid density, water holdup, pressure, and temperature data measured by the second production profile logging instrument at the upper, middle, and lower parts of the casing.

8. The method for testing the production profile according to claim 6, characterized in that In step nine, comparing the first data set measured by the first profiling logging instrument at the upper, middle and lower parts of the casing with the second data set measured by the second profiling logging instrument at the upper, middle and lower parts of the casing respectively includes: Compare the turbine speed, fluid density, water holdup, pressure, and temperature data measured by the first production and profiling logging instrument at the upper part of the casing with the turbine speed, fluid density, water holdup, pressure, and temperature data measured by the second production and profiling logging instrument at the upper part of the casing; The turbine speed, fluid density, water holdup, pressure, and temperature data measured by the first production and profiling logging instrument at the middle of the casing are compared with the turbine speed, fluid density, water holdup, pressure, and temperature data measured by the second production and profiling logging instrument at the middle of the casing; The turbine speed, fluid density, water holdup, pressure and temperature data measured by the first production profile logging instrument at the lower part of the casing are compared with the turbine speed, fluid density, water holdup, pressure and temperature data measured by the second production profile logging instrument at the lower part of the casing.

9. The method for testing the production profile according to claim 7, characterized in that In step nine, comparing the first data set measured by the first profiling logging instrument at the upper, middle and lower parts of the casing with the second data set measured by the second profiling logging instrument at the upper, middle and lower parts of the casing respectively includes: Compare the turbine speed, fluid density, water holdup, pressure, and temperature data measured by the first production and profiling logging instrument at the upper part of the casing with the turbine speed, fluid density, water holdup, pressure, and temperature data measured by the second production and profiling logging instrument at the upper part of the casing; The turbine speed, fluid density, water holdup, pressure, and temperature data measured by the first production and profiling logging instrument at the middle of the casing are compared with the turbine speed, fluid density, water holdup, pressure, and temperature data measured by the second production and profiling logging instrument at the middle of the casing; The turbine speed, fluid density, water holdup, pressure and temperature data measured by the first production profile logging instrument at the lower part of the casing are compared with the turbine speed, fluid density, water holdup, pressure and temperature data measured by the second production profile logging instrument at the lower part of the casing.

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