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A Method for Measuring the Oil-Water Contribution of Each Section of a Volume Fractured Horizontal Well Using a Chemical Tracer

A technology of testing volume and chemical tracer, which is applied in construction and other fields, can solve the problems of test result error, encroachment, technology can only evaluate the contribution of liquid production, etc., and achieve the effect of ensuring accuracy

Active Publication Date: 2019-05-07
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Tracer monitoring technology is currently also used to monitor fracturing effects. There are many problems such as: formation adsorption and bacterial encroachment; radioactive contamination; special operations on site take a long time, and the tracer materials have been exhausted, resulting in the inability to complete the test Or there are large errors in the test results; the most important point is that the current technology can only evaluate the contribution of liquid production, and cannot distinguish the contribution of oil or water production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] In order to overcome the problems in the process of testing the fluid production profile of volumetrically fractured horizontal wells, this embodiment provides a method for testing the contribution of oil and water in each section of volumetrically fractured horizontal wells by using chemical tracers, which includes the following steps:

[0046] Step 1) Choose different tracers according to the number of sections to be tested in the horizontal well, select one tracer for each section, and each tracer includes an oil agent and a water agent, and the selected tracer The original characteristics can be maintained under oil layer temperature and formation pressure;

[0047] Step 2) Determine the amount of oil and water in each section according to the fracturing operation parameters, the volume of the reservoir produced by the horizontal well, the productivity of a single section, and the minimum detection concentration of the effective tracer material;

[0048] Step 3) Start frac...

Embodiment 2

[0055] On the basis of Example 1, this example provides a method for testing the contribution of oil and water in each section of a volumetric fractured horizontal well by using a chemical tracer, which includes the following steps:

[0056] Step 1) Choose different tracers according to the number of sections to be tested in the horizontal well, select one tracer for each section, and each tracer includes an oil agent and a water agent, and the selected tracer The original characteristics can be maintained under oil layer temperature and formation pressure;

[0057] Step 2) Determine the amount of oil and water in each section according to the fracturing operation parameters, the volume of the reservoir produced by the horizontal well, the productivity of a single section, and the minimum detection concentration of the effective tracer material;

[0058] Step 3) Start fracturing. The sequence of fracturing fluid is prefluid→sand-carrying liquid→displacement liquid. Inject the oil and...

Embodiment 3

[0065] On the basis of Example 2, this example provides a method of using chemical tracers to test the contribution of oil and water in each section of a volumetrically fractured horizontal well, which includes the following steps:

[0066] Step 1) Choose different tracers according to the number of sections to be tested in the horizontal well, select one tracer for each section, and each tracer includes an oil agent and a water agent, and the selected tracer The original characteristics can be maintained under oil layer temperature and formation pressure;

[0067] Step 2) Determine the amount of oil and water in each section according to the fracturing operation parameters, the volume of the reservoir produced by the horizontal well, the productivity of a single section, and the minimum detection concentration of the effective tracer material;

[0068] Step 3) Start fracturing. The sequence of fracturing fluid is prefluid→sand-carrying liquid→displacement liquid. Inject the oil and ...

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PUM

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Abstract

The invention discloses a method for testing oil and water contribution of each segment of a volume fractured horizontal well by using a chemical tracer. The method mainly comprises the following four key links: first, determining types of an oiling agent and a water aqua; second, estimating use amount of the oiling agent and the water aqua in each segment; third, making injection methods of the oiling agent and water aqua in each segment of a horizontal well clear; four, in a flowback and production process of a fracturing fluid, sampling and analyzing and testing, determining production concentration of an effective tracer material in the oiling agent and water aqua in each segment, and calculating oil-producing water-producing contribution rate of each segment. The method solves problems in a previous tracer monitoring technology that when stratum absorption, bacteria encroachment, radioactive contaminatin, and special operation occur, a tracer material is used up, and only liquid producing contribution can be evaluated.

Description

Technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to a method for testing the contribution of oil and water in each section of a volumetric fracturing horizontal well by using a chemical tracer. Background technique [0002] Since the 1950s, the petroleum industry has introduced tracer technology in reservoir evaluation, profile testing, profile control analysis and evaluation, mainly for monitoring the communication between injection and production wells and the flow of injected fluid in the formation. Spread the situation. [0003] Tracer monitoring technology is currently also used to monitor the effect of fracturing, and there are many problems such as: formation adsorption and bacterial cannibalization; radioactive contamination; when special operations occur on site, it takes a long time and the tracer materials have been exhausted, making it impossible to complete the test Or the test results have large errors; the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/11
CPCE21B47/11
Inventor 张彦军赵振峰李宪文张矿生唐梅荣王文雄李志文江智强山树民杨晓刚闫永萍吕昌盛
Owner PETROCHINA CO LTD