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Method for testing oil and water contribution of each segment of volume fractured horizontal well by using chemical tracer

A technology of testing volume and chemical tracer, applied in construction and other directions, can solve problems such as long consumption time, error in test results, exhaustion of tracer materials, etc., to reduce losses and ensure accuracy.

Active Publication Date: 2016-10-12
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

[0044] In order to overcome the problems existing in the testing process of the fluid production profile of a volumetric fracturing horizontal well, this embodiment provides a method for testing the oil-water contribution of each section of a volumetric fracturing horizontal well using a chemical tracer, including the following steps:

[0045] Step 1) Select different tracers according to the number of sections to be tested in the horizontal well, select a tracer for each section, and each tracer includes an oil agent and a water agent, and the selected tracer It can maintain the original characteristics under the reservoir temperature and formation pressure;

[0046] Step 2) Determine the amount of oil agent and water agent in each stage according to the fracturing operation parameters, the volume of the horizontal well producing reservoir, the productivity of a single stage, and the minimum detected concentration of effective tracer substances;

[0047] Step 3) Start fractur...

Embodiment 2

[0054] On the basis of Embodiment 1, this embodiment provides a method for utilizing chemical tracers to test the oil-water contribution of each section of a volumetric fracturing horizontal well, comprising the following steps:

[0055] Step 1) Select different tracers according to the number of sections to be tested in the horizontal well, select a tracer for each section, and each tracer includes an oil agent and a water agent, and the selected tracer It can maintain the original characteristics under the reservoir temperature and formation pressure;

[0056] Step 2) Determine the amount of oil agent and water agent in each stage according to the fracturing operation parameters, the volume of the horizontal well producing reservoir, the productivity of a single stage, and the minimum detected concentration of effective tracer substances;

[0057] Step 3) Start fracturing, the sequence of fracturing fluid is pre-fluid→sand-carrying fluid→displacing fluid, inject oil and wate...

Embodiment 3

[0064] On the basis of Embodiment 2, this embodiment provides a method for testing the oil-water contribution of each section of a volumetric fracturing horizontal well using a chemical tracer, including the following steps:

[0065] Step 1) Select different tracers according to the number of sections to be tested in the horizontal well, select a tracer for each section, and each tracer includes an oil agent and a water agent, and the selected tracer It can maintain the original characteristics under the reservoir temperature and formation pressure;

[0066] Step 2) Determine the amount of oil agent and water agent in each stage according to the fracturing operation parameters, the volume of the horizontal well producing reservoir, the productivity of a single stage, and the minimum detected concentration of effective tracer substances;

[0067] Step 3) Start fracturing, the sequence of fracturing fluid is pre-fluid→sand-carrying fluid→displacing fluid, inject oil and water in...

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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 oil-water contribution of each segment of a volumetric fracturing horizontal well by using a chemical tracer. Background technique [0002] Since the 1950s, the petroleum industry began to introduce tracer technology in reservoir evaluation, profile testing, profile control analysis and evaluation, mainly for monitoring the connection relationship between injection and production wells and the flow of injected fluid in the formation. spillover situation. [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 m...

Claims

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Application Information

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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
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