水平井油管传输标记物分段找水技术

于永生; 廖汉明; 齐行涛; 刘贺; 张祖峰; 邵彦峰

doi:10.11911/syztjs.2018153

水平井油管传输标记物分段找水技术

1.
中国石油大港油田分公司石油工程研究院，天津 300280
2.
中国石油大港油田分公司第六采油厂，河北黄骅 061199

详细信息

作者简介:
于永生（1968—），男，陕西宝鸡人，1991年毕业于西安石油学院应用化学专业，高级工程师，主要从事调剖堵水方面的技术研究工作。E-mail：1939028541@qq.com

中图分类号: TE341
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出版历程
- 收稿日期: 2018-07-01
- 修回日期: 2018-12-03
- 网络出版日期: 2019-03-17
- 刊出日期: 2019-02-28

Segmented Water Location Technology via Conveyed Tubing Marker for Horizontal Wells

1.
Petroleum Engineering Research Institute , PetroChina Dagang Oilfield Company, Tianjin, 300280, China
2.
The No.6 Oil Production Plant, PetroChina Dagang Oilfield Company, Huanghua, Hebei, 061199, China

摘要

摘要:
针对目前水平井找水作业的需求和技术难点，利用稀土元素的丰度和元素间γ峰值的干扰等性能特点，选取由中子照射产生的5种自然界中不存在的同位素标记物，通过冶金工艺将其制备成具有一定孔隙度的固态标记物，并将其放置在具有限压打开结构的释放装置中，通过油管输送至水平井内的不同井段，测试产出流体中不同同位素标记物的信号强度，根据测试数据确定出水位置，形成了水平井油管传输标记物分段找水技术。该技术在大港油田3口水平井进行了现场试验，找水准确率达100%。研究和现场试验表明，水平井油管传输标记物分段找水技术克服了常规水平井找水技术存在的缺陷，找水管柱可以下入井眼轨迹复杂的水平井段，在正常生产状况下对机械采油井实施测试找水，找水准确率高，为水平井分段找水提供了新的技术手段。
- 水平井 /
- 分段找水 /
- 标记物 /
- 同位素
Abstract:
In view of the existing demands and technical difficulties of pinpointing the location of in horizontal wells a new technology was proposed. This new technology uses the properties such as rare earth element abundance and inter-element γ peak interference. In this case, five neutron irradiation- generated isotopic markers that would not present naturally were selected, and a metallurgical process was utilized to form the solid marker with a certain porosity. Such marker was placed in a release device with the pressure-limiting open mechanism and conveyed to a horizontal well by tubing. By distributing the marker in different well sections, they were able to test the signal strength of different isotope markers in the produced fluid and determined the water producing location by analyzing the test data. The segmented water location technology by tubing conveyed marker for horizontal well was field tested in three horizontal wells, and the accuracy of water location reached 100%, which provided a reference for water shut-off and water plugging. Research and field tests showed that this technology overcame the shortcomings of existing water location technologies for horizontal wells, the water location string could be run in horizontal wells with complicated wellbore trajectories,. They were able to successfully complete the test and determine the water location in mechanically produced wells under production conditions. This technology had high accuracy of water location and could provide new technical means for accurate segmented water location in horizontal wells.
- horizontal well /
- segmented water location /
- marker /
- isotope

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图 1 固体标记物释放装置

Figure 1. Solid marker release device

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图 2 测试管柱结构示意

1. 采油泵；2. 套压阀；3. 封隔器；4. 释放装置；5A、5B、5C. 标记物；6. 油管；7. 水平井专用球座

Figure 2. Schematic diagram of test string

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图 3 孔X井找水标记物的信号强度

Figure 3. Signal strength of water location marker in Well Kong X

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图 4 孔X井产水剖面测试结果

Figure 4. Water producing profile test results in Well Kong X

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表 1 5种同位素标记物及其性能参数

Table 1 Five isotope markers and their performance parameters

序号	标记元素	半衰期/d	γ能量/keV	绝对强度，%	母核（n，γ）
1	$\scriptstyle {}_{37}^{86}{\rm{Rb}}$ （铷）	18.631	1 077.000	8.64	$\scriptstyle {}_{37}^{85}{\rm{Rb}}$
2	$\scriptstyle {}_{24}^{51}{\rm{Cr}}$ （铬）	27.703	320.083	9.87	$\scriptstyle {}_{24}^{50}{\rm{Cr}}$
3	$\scriptstyle {}_{44}^{103}{\rm{Ru}}$ （钌）	39.260	610.330	5.76	$\scriptstyle {}_{44}^{102}{\rm{Ru}}$
4	$\scriptstyle {}_{26}^{59}{\rm{Fe}}$ （铁）	44.495	1 291.590	43.20	$\scriptstyle _{26}^{58}{\rm{Fe}}$
5	$\scriptstyle {}_{41}^{95}{\rm{Nb}}$ （铌）	35.000	765.780	99.79	$\scriptstyle {}_{40}^{95}{\rm{Zr}}$

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