Method for testing fluid production profile of non-flowing vertical well

Abstract

The invention relates to the technical field of oil and gas well oil testing and production testing, in particular to a non-flowing vertical well fluid production profile testing method which comprises the following steps that S1, a fracturing bridge plug is drilled, and a quick drilling insertion pipe bridge plug to be set is scraped clean; s2, according to the interpretation result of the well logging data of each to-be-tested layer, determining the tripping-in mode of the quick drilling intubation pipe bridge plug, and testing according to a sequence from top to bottom or a sequence from bottom to top; s3, a quick drilling pipe inserting bridge plug is put in; and S4, lowering an insertion tube for testing, and determining the oil-water property and the productivity of the layer to be tested. According to the invention, a non-flowing, multi-phase flow and sand-blocking-prevention vertical well fluid production profile testing method is realized, a hard layering mode is adopted, the purpose of improving accurate monitoring is achieved, the fluid production contribution rate and the fracturing effect of each to-be-tested layer can be accurately known, and guidance is provided for layer selection development and fracturing scheme optimization when a horizontal well is drilled.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas well oil testing and production testing, and is a method for testing the production fluid profile of a non-self-flowing vertical well. Background Art

[0002] At present, low-permeability unconventional oil and gas reservoirs need to be fractured during the exploration and development process to transform the reservoir. The number of wells using perforation bridge plug combination and casing volume fracturing mode of "large displacement, large liquid volume, and large sand volume" is increasing. With the implementation of the concept of "vertical well control reservoir, horizontal well production increase", vertical well segmentation, large-scale casing fracturing, and oil testing technology to determine the production capacity of each section through production fluid profile monitoring has become a trend.

[0003] The patent document with application number CN202010035714.1 and name "Composite Material Rapid Drilling and Inserting Pipe Bridge Plug" discloses: The composite material rapid drilling and inserting pipe bridge plug has reliable anchoring, can achieve precise positioning and injection, and after use, the inserting pipe part can be lifted out and the bridge plug part can be quickly drilled and ground, which is safe and reliable, and greatly improves the construction efficiency.

[0004] The patent document with application number 201320019823.X and name of large diameter intubating oil production bridge plug discloses: the large diameter intubating oil production bridge plug has improved the pressure resistance and anti-creep performance of the bridge plug, and is particularly suitable for long-term underground sealing of high liquid volume oil wells for oil production, which can reduce the frequency of pump inspections and reduce oil production costs.

[0005] At present, the production fluid profile testing technology is mainly divided into two categories: one is the cable / tubing transmission + production profile testing instrument (turbine flowmeter, water holdup probe, optical probe, etc.) testing technology and distributed optical fiber testing technology. These technologies are mainly suitable for self-flowing wells, but for wells with oil, gas and water three-phase fluid production, the reliability of the interpretation results is poor; the other is the tubing / tubing transmission + packer testing technology, which realizes testing by dragging the tubing and sealing and unsealing the packer multiple times. These technologies are mainly suitable for non-flowing wells, but for wells with easy leakage and sand production in the wellbore, it is often difficult to unseal the packer. Summary of the invention

[0006] The present invention provides a method for testing the production profile of a non-flowing vertical well, which overcomes the deficiencies of the above-mentioned prior art and can effectively solve the problem that the existing non-flowing, multiphase flow, and sand-prone formations are difficult to test.

[0007] The technical solution of the present invention is achieved by the following measures: A method for testing the production profile of a non-flowing vertical well comprises the following steps: S1, drill the fracturing bridge plug and scrape the fast-drilling pipe bridge plug to be set clean; S2, according to the interpretation results of the logging data of each layer to be tested, determine the method of inserting the rapid drilling pipe bridge plug, and test in a top-down or bottom-up order; S3, insert the rapid drilling pipe bridge plug; S4, insert the pipe for testing to determine the oil and water properties and production capacity of the layer to be tested.

[0008] The following are further optimizations and / or improvements to the above technical solutions: In the above step S2, If the interpretation results of the logging data of each layer to be tested are the same, the test will be carried out in order from top to bottom; If the interpretation results of the logging data of each layer to be tested are different, the tests should be carried out in order from bottom to top.

[0009] In the above step S3, If you test from top to bottom, follow these steps: S31, lowering a first rapid drilling pipe-inserted bridge plug, and setting the first rapid drilling pipe-inserted bridge plug between the first layer to be measured and the second layer to be measured; S32, lowering a second rapid drilling pipe-inserted bridge plug, and setting the second rapid drilling pipe-inserted bridge plug between the second layer to be measured and the third layer to be measured; S33, inserting a plurality of rapid drilling pipe-inserted bridge plugs in sequence from bottom to top, so that each rapid drilling pipe-inserted bridge plug is seated between corresponding layers to be measured; If the test is conducted in a bottom-up order, the first rapid drilling pipe bridge plug is lowered and sealed between the first layer to be tested and the second layer to be tested; The distances between the first layer to be measured, the second layer to be measured and the third layer to be measured and the wellhead decrease in sequence.

[0010] In the above step S4, If you test from top to bottom, follow these steps: S41, lowering an oil pipe with a cannula installed at the lower end, and after the lower end of the cannula is lowered to 50 to 60 meters above the uppermost layer to be tested, pumping is performed to determine the oil and water properties and production capacity of the uppermost layer to be tested; S42, bring out the cannula and drill and grind off the topmost rapid-drill cannula bridge plug; S43, lower the cannula and clean the wellbore at the same time, clean the top fast-drilling cannula bridge plug, continue to lower the oil pipe, insert the cannula into the top drill cannula bridge plug, pump out the water to determine the oil and water properties and production capacity of the layer to be tested; S44, repeating S42 to S43, determining the oil and water properties and production capacity of all the layers to be tested from top to bottom; If you test from bottom to top, follow these steps: S45, lowering an oil pipe with a cannula installed at the lower end, inserting the cannula into the first rapid drilling cannula bridge plug, pumping to obtain production, and determining the oil and water properties and production capacity of the first layer to be measured; S46, the cannula is brought out, a second rapid-drilled cannula bridge plug is lowered, and the second rapid-drilled cannula bridge plug is set and sealed between the second layer to be measured and the third layer to be measured; S47, lowering the oil pipe with the cannula installed at the lower end again, inserting the cannula into the second rapid drilling cannula bridge plug, pumping to determine the oil and water properties and production capacity of the second layer to be tested; S48, repeating S46 and S47, and determining the oil and water properties and production capacities of the multiple layers to be tested in sequence from bottom to top.

[0011] In the above steps S41 to S44, if the layer to be measured produces water, ash is injected into the layer to be measured that produces water through the oil pipe to seal the layer to be measured that produces water.

[0012] In the above steps S45 to S48, if the layer to be measured produces water, ash is injected into the layer to be measured that produces water through the oil pipe to seal the layer to be measured that produces water.

[0013] The present invention realizes a non-self-flowing, multiphase flow, and sand-stuck vertical well production fluid profile testing method, adopts a hard stratification method to improve the purpose of accurate monitoring, can accurately understand the production fluid contribution rate of each layer to be tested and the fracturing effect, and provide guidance for horizontal well drilling and layer selection development and fracturing scheme optimization. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Attached Figure 1 This is a schematic diagram of the main structure when the cannula is lowered in Example 1.

[0015] Attached Figure 2 This is a schematic diagram of the main structure when the cannula is inserted into the second rapid drilling cannula bridge plug in Example 3.

[0016] The codes in the attached drawings are: 1 for the intubation, 2 for the oil pipe, 3 for the first rapid drilling intubation bridge plug, 4 for the second rapid drilling intubation bridge plug, 5 for the first layer to be tested, 6 for the second layer to be tested, and 7 for the third layer to be tested. DETAILED DESCRIPTION

[0017] 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.

[0018] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached Figure 1 The positional relationships such as front, back, top, bottom, left, and right are described according to the layout directions of the drawings in the specification.

[0019] 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 non-flowing vertical well production profile testing method includes the following steps: S1, drill the fracturing bridge plug and scrape the fast-drilling pipe bridge plug to be set clean; S2, according to the interpretation results of the logging data of each layer to be measured, determine the method of inserting the rapid drilling pipe bridge plug, If the interpretation results of the logging data of each layer to be tested are the same, the test will be carried out in order from top to bottom; If the interpretation results of the logging data of each layer to be tested are different, the test should be carried out in order from bottom to top; S3, insert the rapid drilling pipe bridge plug; S4, insert the plug pipe 1 for testing to determine the oil and water properties and production capacity of the test layer.

[0020] According to the demand, the rapid drilling pipe plug is an existing known technology. According to the interpretation results of the logging data of each layer to be tested, if the interpretation results of the logging data of each layer to be tested are the same, such as all the layers to be tested are oil and gas layers or poor oil layers, then the test is carried out in a top-to-bottom order; if the interpretation results of the logging data of each layer to be tested are different, such as the logging data of the upper layer to be tested is interpreted as an oil and gas layer, and the logging data of the lower layer to be tested is interpreted as a poor oil layer; or, the logging data of the upper layer to be tested is interpreted as an oil and gas layer, and the logging data of the lower layer to be tested is interpreted as an oil-water layer, then the test is carried out in a bottom-to-top order.

[0021] The present invention realizes a non-self-flowing, multiphase flow, and sand-stuck vertical well production fluid profile testing method, adopts a hard stratification method to improve the purpose of accurate monitoring, can accurately understand the production fluid contribution rate of each layer to be tested and the fracturing effect, and provide guidance for horizontal well drilling and layer selection development and fracturing scheme optimization.

[0022] The above-mentioned non-flowing vertical well production profile test method 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, in step S3, If you test from top to bottom, follow these steps: S31, lowering the first rapid drilling pipe bridge plug 3, and setting the first rapid drilling pipe bridge plug 3 between the first layer to be measured 5 and the second layer to be measured 6; S32, lowering a second rapid drilling pipe-inserted bridge plug 4, and sealing the second rapid drilling pipe-inserted bridge plug 4 between the second layer to be measured 6 and the third layer to be measured 7; S33, inserting a plurality of rapid drilling pipe-inserted bridge plugs in sequence from bottom to top, so that each rapid drilling pipe-inserted bridge plug is seated between corresponding layers to be measured; If the test is conducted in a bottom-up order, the first rapid drilling pipe bridge plug 3 is lowered and sealed between the first layer to be tested 5 and the second layer to be tested 6; The distances between the first layer to be measured 5, the second layer to be measured 6 and the third layer to be measured 7 and the wellhead decrease in sequence.

[0023] By lowering the existing known fast-drilling pipe bridge plugs through the cable, the tests are carried out in a top-down order, which has the advantage of the cable car efficiently lowering multiple fast-drilling pipe bridge plugs in one operation.

[0024] Embodiment 3: As an optimization of the above embodiment, as shown in the attached Figure 1 , 2 As shown, in step S4, If you test from top to bottom, follow these steps: S41, lowering the oil pipe 2 with the cannula 1 installed at the lower end, and after the lower end of the cannula 1 is lowered to 50 to 60 meters above the uppermost layer to be tested, pumping is performed to determine the oil and water properties and production capacity of the uppermost layer to be tested; S42, bring out the cannula 1, and drill and grind off the top rapid-drill cannula bridge plug; S43, lowering the cannula 1, cleaning the wellbore at the same time, cleaning the top fast-drilling cannula bridge plug, and continuing to lower the oil pipe 2, inserting the cannula 1 into the top drilling cannula bridge plug, pumping to determine the oil and water properties and production capacity of the layer to be tested; S44, repeating S42 to S43, determining the oil and water properties and production capacity of all the layers to be tested from top to bottom; If you test from bottom to top, follow these steps: S45, lowering the oil pipe 2 with the cannula 1 installed at the lower end, inserting the cannula 1 into the first rapid drilling cannula bridge plug 3, pumping to determine the oil and water properties and production capacity of the first test layer 5; S46, taking out the cannula 1, lowering the second rapid drilling cannula bridge plug 4, and setting the second rapid drilling cannula bridge plug 4 between the second layer to be tested 6 and the third layer to be tested 7; S47, lowering the oil pipe 2 with the cannula 1 installed at the lower end again, inserting the cannula 1 into the second rapid drilling cannula bridge plug 4, pumping to determine the oil and water properties and production capacity of the second test layer 6; S48, repeating S46 and S47, and determining the oil and water properties and production capacities of the multiple layers to be tested in sequence from bottom to top.

[0025] Testing in this way from top to bottom has the advantage that the cable car can efficiently lower multiple fast-drilled pipe bridge plugs in one operation, and testing in this way from bottom to top has the advantage that the water-producing layer can be sealed after the test.

[0026] Embodiment 4: As an optimization of the above embodiment, as shown in the attached Figure 1 , 2 As shown, in step S41 to step S44, if the layer to be tested produces water, ash is injected into the layer to be tested that produces water through the oil pipe 2 to seal the layer to be tested that produces water; In step S45 to step S48, if the layer to be tested produces water, ash is injected into the layer to be tested that produces water through the oil pipe 2 to seal the layer to be tested that produces water. This has the advantage that the water-producing layer can be sealed after the test is completed.

[0027] The process of the non-flowing vertical well production profile testing method of the present invention is as follows: The first step is to use a perforated bridge plug in the vertical well L021, with a three-layer fracturing process, including the first test layer 5 (1990 to 2000m), the second test layer 6 (1800 to 1810m), and the third test layer 7 (1740 to 1750m). During the post-fracturing and drainage process, fracturing sand was produced in the formation. Due to the low formation pressure coefficient, the spraying was stopped on the third day of fluid withdrawal. The fracturing bridge plug was drilled out with tubing, and the vicinity of the third test layer 7 (1900m and 1770m) to be sealed was scraped clean. After the wellbore was cleaned, the pipe string was pulled out; Step 2: In vertical well L021, the interpretation results of the logging data of the first test layer 5 (1990 to 2000 m), the second test layer 6 (1800 to 1810 m), and the third test layer 7 (1740 to 1750 m) are the same, so the test is selected from top to bottom; The third step is to lower the rapid drilling pipe bridge plug by cable. The first rapid drilling pipe bridge plug 3 is lowered by cable and sealed between the first layer to be tested 5 (1990 to 2000 m) and the second layer to be tested 6 (1800 to 1810 m). The first rapid drilling pipe bridge plug 3 is sealed at 1900 m. The second rapid drilling pipe bridge plug 4 is lowered by cable and sealed between the second layer to be tested 6 (1800 to 1810 m) and the third layer to be tested 7 (1740 to 1750 m). The second rapid drilling pipe bridge plug 4 is sealed at 1770 m. Step 4: lower the oil pipe 2 with the cannula 1 installed at the lower end, lower the lower end of the cannula 1 to 1690m, and use the oil pipe pumping method to determine the production, and determine the oil and water properties and production capacity of the third test layer 7 (1740 to 1750m): daily oil production of 10 cubic meters, daily water production of 3 cubic meters, oil content of 76.9%; The oil pipe was lowered, and the sand was flushed and the well was washed while lowering. The cannula 1 was inserted into the second rapid drilling cannula bridge plug 4. The production was calculated by using the oil pipe pumping method. The oil and water properties and production capacity of the second test layer 6 (1800 to 1810m) were determined: 5 cubic meters of oil per day, 6 cubic meters of water per day, and an oil content of 45.5%; The plug 1 is brought out, and the drilling and grinding pipe string is lowered to drill and grind off the second fast-drilling plug 4. The drilling and grinding pipe string is brought out, and the oil pipe 2 with the plug 1 installed at the lower end is lowered and flushed while lowering, so that the plug 1 is inserted into the first fast-drilling plug 3. The production is calculated by oil pipe pumping, and the oil and water properties and production capacity of the first test layer 5 (1990 to 2000m) are determined: 0.2 cubic meters of oil per day, 1 cubic meter of water per day, and 16.7% oil content. If the pumping liquid level recovers slowly and the formation fluid supply is insufficient, the plug 1 is pulled out from the first fast-drilling plug 3, and the oil pipe 2 is used to replace the mortar and inject mortar to seal the first test layer 5 (1990 to 2000m).

[0028] For Well L021, the main contribution to oil production comes from the third layer to be tested 7 (1740 to 1750 m) at the top of the Carboniferous System; the second layer to be tested 6 (1800 to 1810 m) in the middle has a high water content in the reservoir; the first layer to be tested 5 (1990 to 2000 m) at the bottom has insufficient formation fluid supply and is a poor reservoir. Later horizontal well development should focus on the top of the Carboniferous System.

[0029] 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 method for testing the production profile of a non-flowing vertical well, characterized in that The steps include: S1, drill the fracturing bridge plug and scrape the fast-drilling pipe bridge plug to be set clean; S2, according to the interpretation results of the logging data of each layer to be tested, determine the method of inserting the rapid drilling pipe bridge plug, and test in a top-down or bottom-up order; S3, insert the rapid drilling pipe bridge plug; S4, insert the pipe for testing to determine the oil and water properties and production capacity of the layer to be tested.

2. The method for testing the fluid production profile of a non-flowing vertical well according to claim 1, characterized in that In step S2, If the interpretation results of the logging data of each layer to be tested are the same, the test will be carried out in order from top to bottom; If the interpretation results of the logging data of each layer to be tested are different, the tests should be carried out in order from bottom to top.

3. The method for testing the fluid production profile of a non-flowing vertical well according to claim 2, characterized in that In step S3, If you test from top to bottom, follow these steps: S31, lowering a first rapid drilling pipe-inserted bridge plug, and setting the first rapid drilling pipe-inserted bridge plug between the first layer to be measured and the second layer to be measured; S32, lowering a second rapid drilling pipe-inserted bridge plug, and setting the second rapid drilling pipe-inserted bridge plug between the second layer to be measured and the third layer to be measured; S33, inserting a plurality of rapid drilling pipe-inserted bridge plugs in sequence from bottom to top, so that each rapid drilling pipe-inserted bridge plug is seated between corresponding layers to be measured; If the test is conducted in a bottom-up order, the first rapid drilling pipe bridge plug is lowered and sealed between the first layer to be tested and the second layer to be tested; The distances between the first layer to be measured, the second layer to be measured and the third layer to be measured and the wellhead decrease in sequence.

4. The method for testing the fluid production profile of a non-flowing vertical well according to claim 3, characterized in that In step S4, If you test from top to bottom, follow these steps: S41, lowering an oil pipe with a cannula installed at the lower end, and after the lower end of the cannula is lowered to 50 to 60 meters above the uppermost layer to be tested, pumping is performed to determine the oil and water properties and production capacity of the uppermost layer to be tested; S42, bring out the cannula and drill and grind off the topmost rapid-drill cannula bridge plug; S43, lower the cannula and clean the wellbore at the same time, clean the top fast-drilling cannula bridge plug, continue to lower the oil pipe, insert the cannula into the top drill cannula bridge plug, pump out the water to determine the oil and water properties and production capacity of the layer to be tested; S44, repeating S42 to S43, determining the oil and water properties and production capacity of all the layers to be tested from top to bottom; If you test from bottom to top, follow these steps: S45, lowering an oil pipe with a cannula installed at the lower end, inserting the cannula into the first rapid drilling cannula bridge plug, pumping to obtain production, and determining the oil and water properties and production capacity of the first layer to be measured; S46, the cannula is brought out, a second rapid-drilled cannula bridge plug is lowered, and the second rapid-drilled cannula bridge plug is set and sealed between the second layer to be measured and the third layer to be measured; S47, lowering the oil pipe with the cannula installed at the lower end again, inserting the cannula into the second rapid drilling cannula bridge plug, pumping to determine the oil and water properties and production capacity of the second layer to be tested; S48, repeating S46 and S47, and determining the oil and water properties and production capacities of the multiple layers to be tested in sequence from bottom to top.

5. The method for testing the fluid production profile of a non-flowing vertical well according to claim 4, characterized in that In step S41 to step S44, if the layer to be measured produces water, ash is injected into the layer to be measured that produces water through the oil pipe to seal the layer to be measured that produces water.

6. The method for testing the fluid production profile of a non-flowing vertical well according to claim 4 or 5, characterized in that In step S45 to step S48, if the layer to be measured produces water, ash is injected into the layer to be measured that produces water through the oil pipe to seal the layer to be measured that produces water.

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