Complex tracer agent for oil field high-temperature hypersalinity block interwell monitoring and application thereof

A high salinity and tracer technology, applied in construction and other fields, can solve the problem that the tracer cannot withstand high temperature and high salinity at the same time, achieve less reagent consumption, high salinity, and broad application prospects Effect

Active Publication Date: 2013-10-09
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The main purpose of the present invention is to overcome the technical problem that the tracer in the prior art cannot resist high temperature and high salinity at the same time, provide a tracer that can resist high temperat

Method used

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  • Complex tracer agent for oil field high-temperature hypersalinity block interwell monitoring and application thereof
  • Complex tracer agent for oil field high-temperature hypersalinity block interwell monitoring and application thereof
  • Complex tracer agent for oil field high-temperature hypersalinity block interwell monitoring and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0030] Example 1

[0031] The five new tracers selected in this example are hydroxylamine erbium chloride, hydroxylamine gadolinium chloride, hydroxylamine dysprosium chloride, hydroxylamine ytterbium chloride, and hydroxylamine holmium chloride. The following experiments were done on these 5 new tracers:

[0032] (1) Tracer interference and compatibility experiment

[0033] The purpose of the compatibility experiment is to determine the compatibility of the tracer with the formation water with high salinity. The experiment method is as follows:

[0034] Five tracers of the same concentration of hydroxylamine erbium chloride, hydroxylamine gadolinium chloride, hydroxylamine dysprosium chloride, hydroxylamine ytterbium chloride, and hydroxylamine holmium chloride (respectively are erbium chloride, gadolinium chloride, and dysprosium chloride). , Ytterbium chloride, holmium chloride, and hydroxylamine chloride at a molar ratio of 1:8 to carry out complexation reaction products) after m...

Example Embodiment

[0052] Example 2 Study on the enrichment method

[0053] If the high-salinity formation water samples obtained on site are directly analyzed for tracers, the main technical difficulties are as follows:

[0054] 1) The background of high salinity will produce serious matrix effect, which will interfere with the analysis of tracer.

[0055] 2) High salinity will cause clogging of the atomization system and sampling system of the instrument.

[0056] Therefore, an effective separation and enrichment method must be adopted before the determination to separate the tracer elements from a large number of matrix elements and concentrate them.

[0057] Extraction chromatography is used for separation and enrichment. This method has the advantages of both liquid-liquid extraction and chromatography. The amount of reagents is small and the separation and enrichment effect is good. Take 500mL or appropriate amount of sample, use NH 3 .H 2 O and HNO 3 Adjust its pH to 2.5-3.0, and then load the col...

Example Embodiment

[0059] Example 3 Practical application analysis of tracer

[0060] In this example, hydroxylamine erbium chloride, hydroxylamine gadolinium chloride, hydroxylamine dysprosium chloride, hydroxylamine ytterbium chloride, and hydroxylamine holmium chloride series tracers are used at high temperatures (the temperature of the 5-well group is between 275°C and 288°C). The salinity of the 5 well group (the salinity of the block where the 5 well group is located is 19,850 mg / L) has undergone actual tracer analysis and testing. A single tracer is put into each well, and samples are taken regularly every day for analysis. The separation and enrichment of the samples The collection method was carried out according to the method of Example 2, and the detection period was 90 days.

[0061] Figure 1 ~ Figure 5 The detection and analysis results of 5 tracers are shown respectively. It can be seen that the tracer provided by the present invention has an analysis accuracy of 10% under high tempe...

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Abstract

The invention provides a complex tracer agent for oil field high-temperature hypersalinity block interwell monitoring and the application thereof. The tracer agent comprises one or more of chlorinated hydroxylamine erbium, hydroxylamine gadolinium chloride, chlorinated hydroxylamine dysprosium, chlorinated hydroxylamine ytterbium and chlorinated hydroxylamine holmium, and the tracer agent is formed by a tracer element and a complexing agent in a complexing mode. The tracer element is selected from one or more of erbium, gadolinium, dysprosium, ytterbium and holmium, the complexing agent is hydroxylammonium chloride, and the molar ratio between the tracer element and the complexing agent is 1:8-1:9 and preferably is 1:8. The tracer agent can resist high temperature (250 DEGC-300 DEG C) and hypersalinity (5000mg/L-20000mg/L). The invention further provides a tracer method for conducting the oil field high-temperature hypersalinity block interwell monitoring by means of the tracer agent, and the method comprises the process of conducting separation and enrichment on the tracer agent in a taken sample.

Description

technical field [0001] The invention relates to a complex tracer for interwell monitoring of high-temperature and high-salinity blocks in oilfields and its application, in particular to a complex tracer suitable for high-temperature (250°C-300°C) high-salinity (5000mg / L~20000mg / L) complex tracer used in interwell dynamic monitoring technology of block, the preparation method of said tracer, said tracer is shown in interwell monitoring of high temperature and high salinity block in oil field The application in the tracer and the interwell monitoring and tracer method of high-temperature and high-salinity blocks in the oil field using the tracer include the process of separating and enriching the tracer in the sample taken. Background technique [0002] Interwell tracer monitoring technology in oil field is a dynamic monitoring technology widely used in oil fields at present. It has made great progress in recent years. There are more and more types of tracers, and the analysi...

Claims

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Application Information

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IPC IPC(8): E21B47/11
Inventor 张洪君王浩龙华赵跃朋王运萍崔加利王丽华王楠郑猛闫峰赵明国王强黄太明汤学志刘国忠李宝莹
Owner PETROCHINA CO LTD
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