临兴–神府井区废弃钻井液处理技术

王景

doi:10.11911/syztjs.2021112

临兴–神府井区废弃钻井液处理技术

王景

中海油能源发展股份有限公司工程技术分公司，天津 300452

基金项目: 中国海油重点科技攻关项目“鄂尔多斯盆地东缘致密气开发钻完井关键技术研究与应用”（编号：ZSWSAKYXM2019-76）部分研究内容

详细信息

作者简介:
王景（1983—），男，河北定州人，2007年毕业于河北科技师范学院机械设计制造及其自动化专业，工程师，主要从事钻井完井技术、装备及油气田环保等相关技术研究及项目施工管理工作。E-mail：wangjing26@cnooc.com.cn

中图分类号: TE992
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出版历程
- 收稿日期: 2021-03-02
- 修回日期: 2021-11-02
- 网络出版日期: 2021-11-11
- 刊出日期: 2022-03-06

Treatment Technology of Waste Drilling Fluids in the Linxing-Shenfu Well Area

WANG Jing

CNOOC EnerTech-Drilling & Production Co, Tianjin, 300452, China

摘要

摘要: 为了解决临兴–神府井区废弃钻井液处理效率低、处理成本高等问题，开展了废弃钻井液无害化处理与重复利用技术研究。在分析废弃钻井液特性以及处理难点的基础上，研发了无毒、廉价的复合高效固化剂和复合铝盐破胶剂，产生的破胶压滤液经处理后用于配制钻井液；结合减量处理设备，研究形成了废弃钻井液无害化处理与重复利用技术。现场试验表明，废弃钻井液经减量处理设备分离后，钻屑含液率低于30%，钻屑质量减少20%～40%；固相含量大的废弃钻井液加入15%固化剂进行固化处理，24 h后即可直接运输，3 d后固化物浸出液满足环保要求；含水率较高的废弃钻井液中加入4.29%破胶剂，即可实现高效破胶，破胶压滤液经处理后可用来配制钻井液，其性能满足钻井要求。废弃钻井液无害化处理与重复利用技术解决了临兴–神府井区的废弃钻井液处理难题，具有较好的推广应用价值。
- 废弃钻井液 /
- 破胶 /
- 固化 /
- 无害化处理 /
- 重复利用 /
- 临兴–神府井区
Abstract: In order to solve the problems of low treatment efficiency, high treatment cost of waste drilling fluids in the Linxing-Shenfu Well Area, a technical research on harmless treatment and reuse technology of waste drilling fluids was carried out. After analyzing the characteristics of the waste drilling fluids and the difficulties in the treatment, a non-toxic composite curing agent with low cost and high efficiency, as well as aluminum salt gel breaker were developed, and the gel-breaking filtrate produced was processed for compound drilling fluids. Combined with the reduction treatment equipment, a harmless treatment and reuse technology of waste drilling fluids was formed. The field test results showed that the liquid content of cuttings was less than 30% and the weight of cuttings reduced by 20%–40% after the separation of the waste drilling fluids by reduction treatment equipment. The waste drilling fluids with high solid content can be directly transported 24 hours after the addition of 15% curing agent, and the leaching fluid can meet the requirements for environmental protection after 3 days. When a 4.29% gel breaker was added to the waste drilling fluids with high water content, a high-efficiency gel breaking can be achieved. The gel-breaking filtrate can be used for compound drilling fluids after treatment, which can meet the operational requirements for drilling. The harmless treatment and reuse technology of waste drilling fluids have solved the problem in treating waste drilling fluids in Linxing-Shenfu Well Area, with good promotion and application value.
- drilling fluids /
- gel breaking /
- curing /
- harmless treatment /
- reuse technology /
- Linxing-Shenfu well area

HTML全文

图 1 废弃钻井液无害化处理与重复利用流程

Figure 1. Harmless treatment and reuse process of waste drilling fluids

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表 1 3种废弃钻井液的基本性能

Table 1 Basic properties of three kinds of waste drilling fluids

序号	钻井液类型	外观和气味	密度/ （kg·L^–1）	表观黏度/ （mPa·s）	塑性黏度/ （mPa·s）	动切力/ Pa	API滤失量/mL	页岩回收率， %	总固相含量，%
1	聚合物钻井液	棕黑色，恶臭味	1.27	10.5	8	2.5	21.6	79.25	11.5
2	抗温聚合物钻井液	深黑色，刺激性气味	1.25	15.5	11	4.5	28.4	83.75	10.2
3	高密度聚合物钻井液	黄色，无特殊气味	1.23	80.0	55	25.0	6.0	90.55	22.7

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表 2 3种废弃钻井液的污染物检测结果

Table 2 Detection result of pollutants in three kinds of waste drilling fluids

废弃钻井液	色度	石油类/ （mg·L^–1）	COD/ （mg·L^–1）	EC₅₀/ （mg·L^–1）
1号	20 000	5	15 040	4 980
2号	30 000	9	45 000	1 040
3号	2 900	2	9 500	15 430

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表 3 复合固化剂的固化效果

Table 3 Curing effect of composite curing agents

废弃钻井液	固化剂加量，%	浸出液COD/ （mg·L^–1）	浸出液 pH值	色度	固化强度/ MPa
1号	20	145.5	6.8	26	1.6
2号	20	133.4	6.5	20	1.7

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表 4 破胶剂加量优选试验结果

Table 4 Test results of gel breaker dosage optimization

废弃钻井液	质量/g	破胶剂溶液加量/g	破胶剂加量， %	压滤时间/ min	出水率， %
1号	300	10	1.07	35	28.75
	300	20	2.15	40	42.08
	300	30	3.22	30	53.33
	300	40	4.29	30	60.42
2号	300	10	1.07	47	22.92
	300	20	2.15	58	35.00
	300	30	3.22	48	45.00
	300	40	4.29	51	50.42

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表 5 清水与破胶压滤液所配钻井液的性能

Table 5 Performance of drilling fluids prepared with clean water and gel-breaking filtrate

配制钻井液用液体	表观黏度/ （mPa·s）	塑性黏度/ （mPa·s）	动切力/ Pa	静切力/Pa		中压滤失量/mL	24 h后是否沉降
配制钻井液用液体	表观黏度/ （mPa·s）	塑性黏度/ （mPa·s）	动切力/ Pa	初切	终切	中压滤失量/mL	24 h后是否沉降
清水	25	15	10	2.0	2.5	4.5	否
处理前压滤液	17	12	5	0.5	1.0	5.0	严重沉降
处理后压滤液	20	14	6	1.5	1.8	4.4	轻微沉降
处理后压滤液+等量清水	23	15	8	1.5	2.0	4.4	否

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期刊类型引用(7)

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5.	赵小光，孙俊刚，曹玉霞，李发旺. H油田废弃泥浆无害化处理技术研究与应用. 辽宁化工. 2023(04): 544-546+550 . 百度学术
6.	丁新燕，李姝仪，闫君芝，邢艳，王伟. 粉煤灰固化体系对油田废钻井液的固化处理效果. 化工科技. 2023(05): 14-18 . 百度学术
7.	王潇辉，王旭东，姜春丽，师浩林，薛迦文，徐加放. 高密度废弃水基钻井液电破胶条件的响应曲面法. 钻井液与完井液. 2023(05): 622-628 . 百度学术