新型储层钻井完井一体化工作液设计及性能评价

许洁; 许林; 李习文; 寇磊; 许明标

doi:10.12358/j.issn.1001-5620.2023.02.006

新型储层钻井完井一体化工作液设计及性能评价

doi: 10.12358/j.issn.1001-5620.2023.02.006

许洁^1,,
许林^2, ,,
李习文¹,
寇磊¹,
许明标^{3, 4}

1.
中国地质调查局海口海洋地质调查中心, 海口 571127
2.
浙江海洋大学石油化工与环境学院, 浙江舟山 316022
3.
长江大学石油工程学院, 武汉 430100
4.
非常规油气湖北协同创新中心, 武汉 430100

基金项目: 浙江省基础工艺研究项目“海洋油气开发微泄漏压差激活密封剂及其自适应修复机理研究”（LGG20E040002）、舟山市科技计划项目“海洋油气井密封损伤的压力控释靶向修复技术研发” （2019C21006）、湖北省重点研发计划项目（2020BAB072）

详细信息

作者简介:
许洁，高级工程师，博士，1983年生，毕业于中国地质大学（武汉）地质工程专业，现在从事钻井液设计与开发方面研究工作。电话19907562876；E-mail：xujie561@126.com

通讯作者:
许林，副教授，博士，1979年生。主要从事油田化学、计算化学、材料科学等领域的研究工作。E-mail：xuhu_11@yeah.net

中图分类号: TE254
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出版历程
- 收稿日期: 2022-11-05
- 修回日期: 2022-12-01
- 录用日期: 2022-12-10
- 刊出日期: 2023-03-30

Design and Evaluation of an Integrated Drilling and Completion Fluid

XU Jie^1
,,
XU Lin^{2
, ,},
LI Xiwen¹,
KOU Lei¹,
XU Mingbiao^{3, 4}

1.
Haikou Marine Geological Survey Center, China Geological Survey, Haikou, Hainan 571127
2.
School of Petrochemical Engineering and Environment, Zhejiang Ocean University, Zhoushan, Zhejiang 316022
3.
College of Petroleum Engineering, Yangtze University, Wuhan, Hubei 430100
4.
Cooperative Innovation Center of Unconventional Oil and Gas, Wuhan, Hubei 430100

摘要

摘要: 钻井完井一体化工作液是对海洋油气传统裸眼钻井完井液技术的发展，该体系基于D₉₀经验规则与膜屏蔽原理，引入低剪切速率黏度设计，通过暂堵剂的镶嵌、成膜作用在储层孔隙入口构造单向屏蔽环，不仅达到储层保护效果，还可直接返排，从而简化海洋钻井完井工序。阐述了钻井完井一体化工作液的设计思路，检测了关键组分微观结构及体系基本性能，并综合评价了体系储层保护效果。实验结果表明，钻井完井一体化工作液具有刚性和柔性2类暂堵剂粒子，可协同封堵孔隙入口，促进单向屏蔽环形成，其中刚性镶嵌粒子形貌不规则，中值粒径为9.5 μm，大于孔隙尺寸；而柔性成膜粒子呈规则球形，平均粒径为25.4 μm，粒径分布窄，有利于粒间填充及形变聚结。体系在5～130 ℃内具有良好流变性，其低剪切速率黏度平均值为30 802 ± 1892 mPa·s，满足直接返排解堵设计要求；体系展示了良好的润滑性、防塌性及抗海水、抗岩屑侵污性，且单向封堵能力强，直接返排的渗透率恢复效果好。现场应用证明，新型钻井完井一体化工作液不仅能确保储层钻井过程顺利，而且满足了直接返排解堵要求，达到了简化完井工艺的目的。
- 钻井完井 /
- 一体化工作液 /
- 直接返排 /
- 储层保护 /
- 单向屏蔽环
Abstract: The integrated drilling and completion fluid is the development of the traditional drill-in fluid used in offshore open hole drilling. The formulation of this new-generation drill-in fluid is based on the D₉₀ empirical rule and the membrane shielding principle, and the concept of low-shear-rate viscosity is used. The insertion of temporary plugging agent particles and film-forming at the pore entrance of the formation rocks form a unidirectional shielding ring, which not only protects the reservoir from being damaged, but also can be flowed back directly, thereby simplifying the well completion procedure. This paper describes the design of the new-generation drill-in fluid as well as the experiment for examining the micro structure of the key components and the basic performance of the drill-in fluid. Experiments on the reservoir protection performance of the drill-in fluid show that the flexible and the rigid temporary-plugging particles in the drill-in fluid plug the pore entrances in a synergetic way, promoting the formation of the unidirectional shielding ring. Of the temporary-plugging particles, the rigid particles have irregular shapes, with median particle size of 9.5 μm, which is greater than the sizes of the pores; whereas the flexible film-forming particles are in regular spherical shapes with average particle size of 25.4 μm, the narrow size distribution of the flexible particles is beneficial to inter-particle filling and deformation coalescence. The drill-in fluid has good rheology at temperatures between 5 ℃ and 130 ℃, and its average low-shear-rate viscosity is 30,802 ± 1,892 mPa∙s, which satisfy the needs of flowback and block removal. The drill-in fluid has good lubricity, high inhibitive capacity and high resistance to seawater and drilled cuttings contamination. It is a good one-way plugging agent and direct flowback operation produces a high permeability recovery. Field application of this drill-in fluid indicated that the drilling of the reservoir section was smooth and successful, the requirements of direct flowback were satisfied, and the procedure of completing the well was simplified.
- Well drilling and completion /
- Integrated working fluid /
- Direct flowback /
- Reservoir protection /
- Unidirectional shielding ring

HTML全文

图 1 低剪切速率黏度与突破压力、渗透率恢复值间的关系

下载: 全尺寸图片幻灯片

图 2 暂堵剂微观形貌及粒径分布分析

下载: 全尺寸图片幻灯片

图 3 钻井完井一体化工作液承压能力

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图 4 钻井完井一体化工作液与PRD体系处理后岩心孔隙恢复情况

注：颜色变化代表孔隙体积大小

下载: 全尺寸图片幻灯片

表 1 钻井完井一体化工作液的抗温性能

T/ ℃	AV/ mPa·s	PV/ mPa·s	YP/ Pa	FL_API/ mL	LSRV/ mPa·s	摩阻系数
5	39	21	18	4.5	33 364	0.11
10	41	21	20	4.2	34 796	0.10
20	39	20	19	4.4	32 896	0.11
40	37	20	17	4.1	31 353	0.11
80	32	17	15	4.3	30 250	0.10
90	31	16	15	4.2	30 190	0.11
100	32	16	16	4.3	31 062	0.10
110	30	15	15	4.8	29 034	0.10
120	29	15	14	4.4	28 595	0.11
130	27	13	14	5.1	26 482	0.11

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表 2 钻井完井一体化工作液的抗岩屑及海水污染性能

污染物	加量/ %	AV/ mPa·s	PV/ mPa·s	YP/ Pa	FL_API/ mL	LSRV/ mPa·s
岩屑	0	30.5	16.0	14.5	4.5	29 176
	5	33.0	18.0	15.0	4.0	26 775
	10	37.0	20.0	17.0	4.3	24 856
	15	34.0	19.0	15.0	4.2	25 042
海水	0	29.5	17.0	12.5	4.4	28 898
	5	26.5	15.5	11.0	4.6	26 756
	10	24.0	13.5	10.5	5.8	25 863
	15	21.0	11.0	10.0	6.5	23 389

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表 3 岩屑在钻井完井一体化工作液中的防膨率和滚动回收率

样本	防膨率/ %	滚动回收率/%
样本	防膨率/ %	第一次	第二次
海水	77.02	12.34
一体化工作液	91.42	93.20	90.4

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表 4 钻井完井一体化工作液的储层渗透率恢复实验结果

完井方式	岩心	直径/ cm	长度/ cm	K_a/ mD	K₀/ mD
直接返排	19^#	5.102	2.470	30.98	14.85
酸溶解堵	27^#	5.086	2.514	32.74	15.84

完井方式	岩心	K_d/ mD	K_d/K₀ %	P_t/ MPa	P_ts/ MPa
直接返排	19^#	13.50	90.91	0.464	0.152
酸溶解堵	27^#	15.08	95.22	0.415	0.115

下载: 导出CSV

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