即时混配型高密度固井隔离液

谌德宝; 亢菊峰

doi:10.12358/j.issn.1001-5620.2021.06.019

即时混配型高密度固井隔离液

doi: 10.12358/j.issn.1001-5620.2021.06.019

谌德宝^1,,
亢菊峰²

1.
大庆钻探工程公司钻井工程技术研究院, 黑龙江大庆 163413
2.
大庆钻探工程公司钻井二公司, 黑龙江大庆 163413

详细信息

作者简介:
谌德宝，工程师，1983年生，2007年毕业于中国石油大学（北京），主要从事固井外加剂和固井隔离液研发。电话 13734553240

中图分类号: TE256.9
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出版历程
- 收稿日期: 2021-06-29
- 刊出日期: 2021-11-30

An Instantly Prepared Cementing Spacer of High Density

CHEN Debao^1
,,
KANG Jufeng²

1.
Drilling Engineering and Technology Research Institute of Daqing Exploratory Drilling Corporation,Daqing, Heilongjiang 163413
2.
Second Drilling Company of Daqing Exploratory Drilling Corporation,Daqing,Heilongjiang 163413

摘要

摘要: 为适应即时混配工艺需要，并解决高密度隔离液黏稠的问题，研发了一体式隔离液处理剂DQ-SA，其主要成分为表面活性剂改性生物胶。生物胶分子间弱氢键连接受力断裂，表面活性剂胶束定向排布。采用DQ-SA制备的隔离液基液具有明显的剪切稀释特征，马氏漏斗黏度仅为31 s，流动性能极好。同时，利用室内设备进行即时混配模拟实验，掌握了固井水泥车混拌能力，确定了用室内设备模拟固井水泥车混配的具体参数。通过室内实验，在隔离液流动性与稳定性之间取得平衡，确定了一体化处理剂的最佳用量。通过控制加重剂配比，隔离液密度宽幅可调，最高可达2.40 g/cm³。评价显示，该隔离液体系具有良好的流动性、稳定性、相容性和抗温能力。地面和现场试验证实，即时混配工艺操作简便，制备的隔离液性能优良，较好地解决了高密度隔离液应用中存在的问题。
- 隔离液 /
- 即时混配 /
- 高密度 /
- 流动性
Abstract: In order to meet the needs of instant prepared process and solve the problem of viscosity of high density isolating fluid, an integrated treatment agent DQ-SA for spacer was developed, which is mainly composed of surfactant modified biological glue. The weak hydrogen bond of biological glue molecules is broken and the surfactant micelles are arranged directionally when stressed, The base solution of spacer prepared with DQ-SA has obvious shear dilution characteristics. The viscosity of Markovian funnel is only 31s and shows excellent flow performance. At the same time, the simulation experiment of instant prepared is carried out with indoor equipment, the mixing capacity of cementing truck is concluded, and the specific parameters of indoor simulating equipment are determined． Through the laboratory experiment, the balance between the fluidity and stability of the spacer was achieved, and the optimum dosage of the integrated agent was determined. By controlling the proportion of weighting agent, the density of the spacer can be adjusted in a wide range up to 2.40 g/cm³. The evaluation shows that instant prepared spacer has good fluidity, stability, compatibility and temperature resistance. The ground and field tests show that the instant prepared process is easy to operate, the spacer prepared is excellent, and the problems of high density isolating liquid are well solved.
- spacer /
- instantly prepared /
- high density /
- fluidity

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表 1 即时混配型高密度隔离液的流变性能

隔离液	ρ/ g·cm⁻³	FV/ s	PV/ mPa·s	YP/ Pa	流动度/ cm
DQ-SA基浆	1.00	31	7.5	2.8	35
即时混配浆	1.80	49	25.5	8.9	28
	2.00	55	36.0	9.2	28
	2.20	58	43.5	11.5	27
	2.40	68	57.0	12.7	24
常规体系	1.80	105	75.0	31.6	20

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表 2 不同养护条件下高密度隔离液的沉降稳定性

ρ/ g·cm⁻³	△ρ/（g·cm⁻³）
ρ/ g·cm⁻³	室温24 h	室温72 h	170 ℃×4 h	170 ℃×24 h
1.80	0	0	0.02	0.02
2.00	0	0.01	0.02	0.03
2.20	0	0.02	0.02	0.03
2.40	0.01	0.02	0.03	0.05

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表 3 即时混配隔离液与钻井液、水泥浆的相容性

浆体	旋转黏度计读数
浆体	φ₆₀₀	φ₃₀₀	φ₂₀₀	φ₁₀₀	φ₆	φ₃
100%隔离液	61	43	36	26	8	6
100%钻井液	45	28	21	13	3	2
100%水泥浆	129	83	59	37	7	5
75%隔离液+25%钻井液	52	39	29	22	7	5
50%隔离液+50%钻井液	48	35	26	18	6	4
75%隔离液+25%水泥浆	84	58	43	30	7	6
50%隔离液+50%水泥浆	103	69	52	33	7	6

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表 4 地面试验即时混配型高密度隔离液的基本性能

ρ/（g·cm⁻³）	取样频次	流动度/cm	FV/s
1.70	2	32.0	41
1.78	2	30.0
1.92	3	29.0	46
2.02	1	29.0	53
2.07	1	28.0
2.11	1	28.0	57
2.20	2	27.0
2.29	1	26.5
2.34	1	26.0	67

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