一种抗超高温配位键合型低聚物降黏剂

贺垠博; 梁浩; 敬玉娟; 杜明亮; 李小庆

doi:10.12358/j.issn.1001-5620.2024.03.005

一种抗超高温配位键合型低聚物降黏剂

doi: 10.12358/j.issn.1001-5620.2024.03.005

贺垠博^{1, 2,},
梁浩³,
敬玉娟³,
杜明亮^{1, 2},
李小庆^{1, 2}

1.
中国石油大学(北京)油气资源与工程国家重点实验室, 北京 102249
2.
中国石油大学(北京)石油工程教育部重点实验室, 北京 102249
3.
中国石油集团川庆钻探工程公司钻井液技术服务公司, 成都 610051

基金项目: 国家自然科学基金青年科学基金项目“智能钻井液聚合物处理剂刺激响应机理与分子结构设计方法研究”（52004297）；中国石油集团川庆钻探工程有限公司部级科研项目“抗200℃高密度水基钻井液体系研发”（CQ2022B-18-1-3）。

详细信息

作者简介:
贺垠博，中国石油大学（北京）石油工程学院教师，1989年生，主要从事钻井液与完井液材料方面的研究。E-mail: heyb@cup.edu.cn

中图分类号: TE254.4
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出版历程
- 收稿日期: 2024-01-13
- 修回日期: 2024-02-24
- 刊出日期: 2024-06-30

An Ultra-High Temperature Coordinate Bond Oligomer Thinner

HE Yinbo^{1, 2
,},
LIANG Hao³,
JING Yujuan³,
DU Mingliang^{1, 2},
LI Xiaoqing^{1, 2}

1.
State Key Laboratory of Petroleum Resources and Engineering, China University of Petroleum (Beijing), Beijing, 102249
2.
MOE Key Laboratory of Petroleum Engineering, China University of Petroleum (Beijing), Beijing, 102249
3.
Drilling Fluid Technical Service Company of Chuanqing Drilling Engineering Co., Ltd. CNPC, Chengdu，Sichuang 610051

摘要

摘要: 针对高密度水基钻井液高温增稠引发的滤失量大、ECD与内耗高、流动性下降甚至完全丧失难题，在AA-AMPS聚有机酸降黏剂分子中引入富含大量邻苯二酚基团的单宁酸，采用自由基聚合法研制了一种抗超高温配位键合型低聚物降黏剂AA-AMPS-TA，并通过正交实验明确了PAAT的最优合成条件。表征并评价了PAAT的降黏性能，结果表明：引入TA后，PAAT的红外光谱出现了源于酚羟基的分子内氢键吸收峰，且因其分子结构中引入了大量苯酚基团，显著提升了热稳定性，分解温度接近500 ℃；PAAT可降低低浓度膨润土浆和7%膨润土+8%高岭土的高浓度混合黏土浆黏度，在高密度水基钻井液体系中降黏率达26.5%，240 ℃热滚后降黏率达44.4%。采用Zeta电位与粒径分析验证了PAAT的吸附降黏机理，并在蓬深101井中现场应用，控制了井浆高温下黏度、切力增涨，降黏效果良好。
- 超高温 /
- 水基钻井液 /
- 聚合物降黏剂 /
- 配位键合
Abstract: An ultra-high temperature coordinate bonding oligomer thinner AA-AMPS-TA (named PAAT) is synthesized as a way of dealing with the problems encountered in using high density water-based drilling fluids at elevated temperatures. These problems involve high filtration rate, high ECD and internal friction, poor mobility or even complete loss of the mobility of the drilling fluids. The thinner PAAT is synthesized through radical polymerization by introducing the molecules of tanning acids (TA) which are rich in catechol groups into the poly organic acid thinner AA-AMPS. The optimal synthesis condition of the thinner PAAT is determined through orthogonal experiment, and the thinning performance of the thinner is evaluated. The evaluation results show that after introducing TA into the molecules of the AA-AMPS, the IR spectrum of the product PAAT shows an intra-molecule hydrogen bond absorption peak, and the thermal stability of the PAAT molecules is greatly improved because of the introduction of large number of phenol groups; the decomposition temperature of the PAAT molecules is close to 500 ℃. PAAT has the ability to reduce the viscosity of low-concentration bentonite slurry and high clay concentration slurry such as one formulated with 7% bentonite and 8% kaolinite. Using PAAT, the viscosity of a high density water-based drilling fluid can be reduced by 26.5%, and after hot-rolling the water-based drilling fluid at 240 ℃, its viscosity can be reduced by 44.4%. The PAAT thinner reduces viscosity by molecule adsorption, as is verified by Zeta-potential measurement and particle size analysis. This thinner has been used in drilling the well Pengshen-101, and the viscosity and gel strengths of the drilling fluid were both satisfactorily under control at elevated temperatures.
- Ultra-high temperature /
- Water-based drilling fluid /
- Polymer thinner /
- Coordinate bonding

HTML全文

图 1 PAAT的红外光谱图

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图 2 PAAT（a）以及PAA（b）的TG、DTG曲线

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图 3 PAA及PAAT对低浓度膨润土基浆黏度的影响

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图 4 不同基浆中膨润土的形貌（240 ℃、16 h）

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图 5 PAAT在膨润土端面的吸附示意图

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表 1 PAAT合成的正交实验结果

样品	AA∶AMPS （物质的量比）	（AA+AMPS)∶TA （质量比）	T_反应/ ℃	引发剂/%	降黏率/%
1^#	1∶9	5∶1	60	0.1	25
2^#	1∶9	7∶1	70	0.2	35
3^#	1∶9	9∶1	80	0.3	48
4^#	19∶18	5∶1	60	0.1	37
5^#	19∶18	7∶1	70	0.2	50
6^#	19∶18	9∶1	80	0.3	43
7^#	2∶1	5∶1	60	0.1	38
8^#	2∶1	7∶1	70	0.2	48
9^#	2∶1	9∶1	80	0.3	45
K₁/%	36.0	33.3	38.7	40.0
K₂/%	43.3	44.3	39.0	38.7
K₃/%	43.7	45.3	45.3	44.3
R	7.7	12.0	6.6	5.6
注：K₁、K₂、K₃为均值，R为极差。

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表 2 1%PAAT对高浓度混合土浆热滚前后流变性的影响

热滚条件	AV/ mPa·s	PV/ mPa·s	YP/ Pa	φ₁₀₀	降黏率/%
热滚前	41	22	19.42	28
热滚前	15	11	4.09	9	67.8
240 ℃、16 h	44	24	20.44	35
240 ℃、16 h	21	16	5.11	12	65.7

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表 3 不同降黏剂在高密度水基钻井液中的降黏性能

热滚条件	配方	AV/ mPa·s	PV/ mPa·s	YP/ Pa	φ₆/φ₃	φ₁₀₀	降黏率/%
热滚前	空白组	91.0	72	19.42	10/9	49
	+1%PAAT	77.5	63	14.82	6/5	36	26.5
	+1%XY-27	79.0	66	13.29	6/5	38	22.4
	+1%SMS-19	85.5	70	15.84	8/6	44	10.2
240 ℃、16 h	空白组	125	89	36.79	16/14	81
	+1%PAAT	90	67	23.51	9/8	45	44.4
	+1%XY-27	131	102	29.64	19/17	88	-8.6
	+1%SMS-19	＞150			39/31	121	-37.0

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表 4 PAA与PAAT对膨润土Zeta电位及粒径的影响　（240 ℃、16 h）

样品	ζ/mV	中径/μm	平均径/μm	D₁₀/μm	D₉₀/μm
基浆	−43.6	8.113	32.792	2.495	121.114
基浆+PAAT	−59.1	6.955	14.306	1.002	36.057
基浆+PAA	−55.6	7.904	14.929	1.754	40.587

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表 5 蓬深101井井浆维护前后性能变化

测试条件	配方	AV/ mPa·s	PV/ mPa·s	YP/ Pa	φ₆/ φ₃	降黏率/%	FL_HTHP/ mL
热滚前	原始井浆	49.0	39	10.2	3/2
热滚前	兑入胶液	39.6	32	7.6	3/2	17.2
240 ℃、16 h	原始井浆	118.0	93	25.0	15/11		38.0
240 ℃、16 h	兑入胶液	54.8	41	13.8	5/4	48.2	14.2

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