BIODRILL S合成基钻井液在垦利区块首次应用

彭三兵; 李斌; 韩东东; 徐磊; 程龙生; 黄贤斌

doi:10.12358/j.issn.1001-5620.2024.01.006

BIODRILL S合成基钻井液在垦利区块首次应用

doi: 10.12358/j.issn.1001-5620.2024.01.006

1.
中海油田服务股份有限公司, 天津300452
2.
中国海洋石油有限公司天津分公司, 天津300459
3.
中国石油大学（华东）石油工程学院, 山东青岛266580

基金项目: 国家自然科学家基金面上项目“油基钻井液中细微劣质固相选择性絮凝机制及控制方法研究”（52174014）。

详细信息

作者简介:
彭三兵，工程师，现在主要从事钻完井液技术支持与研发工作。电话 13612191469；E-mail：pengsb@cosl.com.cn

中图分类号: TE254.3
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出版历程
- 收稿日期: 2023-09-25
- 修回日期: 2023-10-30
- 刊出日期: 2024-02-02

First Application of the Synthetic-Based Drilling Fluid BIODRILL S in Block Kenli of Bohai Oilfield

1.
China Oilfield Services Limited, CNOOC, Tiainjin 300452
2.
Tianjin Branch, CNOOC China Limited, Tianjin 300459
3.
College of Petroleum Engineering, China University of Petroleum, Qindao, Shandong 266580

摘要

摘要: 渤海油田垦利9-1区块地层岩性复杂，且存在断层带，钻井过程中易发生泥岩水化分散和砂岩层井眼缩径等问题，井壁垮塌风险极大。针对该区块地层岩性特点和技术难题并结合环保要求，制备了一种复合型封堵材料PF-MOSHIELD，构建了BIODRILL S合成基钻井液体系。该体系流变性能良好，抗钙、抗岩屑污染达26%和15%，封堵性、沉降稳定性、润滑性优异，高温高压砂盘滤失量3.2 mL，静置7 d沉降因子为0.53，极压润滑系数0.082。BIODRILL S首次在渤海湾垦利9-1区块进行了现场应用，结果表明：该体系解决了垦利9-1区块泥页岩水化和砂岩层井眼缩径问题，垦利9-1北-3定向探井三开井段上部地层钻屑完整，钻屑达4～7 cm；井眼清洁性能良好，钻井液动塑比超过0.59 Pa/mPa·s，φ₆和φ₃读数均超过9，剪切稀释性强，提高了井眼净化效率，有效避免形成“岩屑床”；润滑性能优异，在大井斜段（55°、70°、67°）可实现直接起钻。
- 合成基钻井液 /
- BIODRILL S /
- 渤海油田 /
- 垦利区块
Abstract: Drilling operation in the Block Kenli 9-1 of the Bohai Oilfield has long been faced with high risks of borehole wall collapse resulted from complex formation lithologies, fault zones, shales that are easy to hydrate and disperse, as well as sandstones in which tight hole problem is frequently encountered. To deal with the borehole wall collapse problem a BIODRILL S synthetic based drilling fluid has been formulated. The BIODRILL S synthetic based drilling fluid is formulated with a base oil which is synthetic oil of choice, a composite plugging additive PF-MOSHIELD, as well as other drilling fluid additives, taking into account the formation lithology and environmental protection requirement. The BIODRILL S drilling fluid has good rheology , and is resistant to 26% calcium contamination and 15% cuttings contamination. Furthermore, it has excellent plugging capacity, settling stability and lubricity. The HTHP filter loss tested on a sand plate tester is 3.2 mL. The sag index of the mud after standing for 7 d is 0.53, and the extreme coefficient of friction is 0.082. BIODRILL S was first used in the Block Kenli 9-1. The application showed that: 1) the BIODRILLS can be used to solve the shale hydration problem and the tight hole problem in the sandstone formation encountered previously in this block; the drilled cuttings produced in drilling the formations in and above the third section are intact, with sizes distributed between 4 cm and 7 cm. 2) Hole cleaning is well done with the BIODRILL S drilling fluid, the ratio of YP/PV is greater than 0.59 Pa/mPa∙s, the φ₆ and the φ₃ reading are all greater than 9, and the drilling fluid has good shear thinning property. All these properties result in good hole cleaning and the prevention of the occurrence of cuttings bed. 3) The drilling fluid has excellent lubricity, making possible the direct tripping (out of hole) through the high angle (55°, 70° and 67°) well sections.
- Synthetic base drilling fluids /
- BIODRILL S /
- Bohai oilfield /
- Block Kenli

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图 1 PF-MOSHIELD对滤纸和陶瓷砂盘的封堵效果

下载: 全尺寸图片幻灯片

图 2 垦利9-1北-3定向探井钻屑

下载: 全尺寸图片幻灯片

表 1 不同加量的PF-MOSHIELD对　钻井液流变和电稳定性影响

加量/（kg·m⁻³）	AV/mPa·s	PV/mPa·s	YP/Pa	Gel/(Pa/Pa)	ES/V
0	11.0	9.0	2.0	2.5/4.5	785
10	12.0	9.5	2.5	3.0/5.0	850
20	13.0	10.0	3.0	4.0/5.0	967
30	15.0	12.0	3.0	4.0/5.5	975

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表 2 BIODRILL S钻井液性能

T/℃	AV/mPa·s	PV/mPa·s	YP/Pa	Gel /(Pa/Pa)	ES/V
25	17.5	14	3.5	5/14	615
65	12.5	10	2.5	5/12	648

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表 3 水相中CaCl₂加量对合成基钻井液性能影响

配方	实验条件	AV/ mPa·s	PV/ mPa·s	YP/ Pa	Gel/ Pa/Pa	FL_HTHP/ mL	ES/ V	滚动回收率/ %
1^# （20%CaCl₂）	老化前	23.0	14	9.0	5.0/11.0		970
1^# （20%CaCl₂）	老化后	22.0	16	6.0	4.5/10.0	0.4	950	98.4
2^# （22%CaCl₂）	老化前	26.0	16	10.0	8.0/14.0		930
2^# （22%CaCl₂）	老化后	22.0	17	5.0	7.0/11.0	0.6	1030	98.6
3^# （24%CaCl₂）	老化前	25.0	15	10.0	7.0/11.5		780
3^# （24%CaCl₂）	老化后	21.5	18	3.5	6.5/10.5	1.0	1150	97.9
4^# （26%CaCl₂）	老化前	25.5	16	9.5	7.0/13.5		740
4^# （26%CaCl₂）	老化后	20.0	15	5.0	6.5/11.0	1.2	1400	97.8
注：老化时间为80 ℃ × 16 h。

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表 4 添加不同浓度岩屑对合成基钻井液性能影响

配方	实验条件	AV/ mPa·s	PV/ mPa·s	YP/ Pa	Gel/ Pa/Pa	ES/ V
基础配方	老化前	22.0	13	9.0	4.5/7.0	840
	80 ℃/16 h	17.0	13	4.0	4.0/8.5	700
	80 ℃/56 h	15.0	13	2.0	3.0/6.5	670
	80 ℃/7 d	15.5	13	2.5	2.5/5.5	570
	80 ℃/13 d	14.5	13	1.5	1.0/7.0	660
10% 钻屑	老化前	23.5	12	11.5	6.5/9.0	1020
	80 ℃/16 h	18.5	13	5.5	6.0/11.5	996
	80 ℃/56 h	17.0	13	4.0	5.0/9.5	570
	80 ℃/7 d	17.0	13	4.0	4.5/9.5	620
	80 ℃/13 d	17.0	13	4.0	4.5/9.0	700
15% 钻屑	老化前	26.5	13	13.5	7.5/11.0	1047
	80 ℃/16 h	20.5	14	6.5	8.0/11.5	941
	80 ℃/56 h	18.5	13	5.5	5.5/11.5	865
	80 ℃/7 d	18.5	14	4.5	5.5/12.0	800
	80 ℃/13 d	18.0	14	4.0	5.0/11.5	820

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表 5 BIODRILL S体系沉降因子评价结果

t_静置/d	ρ_上层/(g·cm⁻³)	ρ_下层/(g·cm⁻³)	SF
1	1.239	1.256	0.503
3	1.230	1.267	0.507
5	1.225	1.272	0.509
7	1.215	1.280	0.513

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表 6 合成基钻井液BIODRILL S的封堵性能评价

石英砂直径/ mm	侵入深度/mm		陶瓷砂盘孔径/μm	FL_HTHP/ mL
石英砂直径/ mm	老化前	80 ℃×16 h	陶瓷砂盘孔径/μm	FL_HTHP/ mL
0.28～0.45	25	27	3	2.0
0.18～0.28	18	21	5	2.5
0.154～0.18	11	12	10	3.2

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表 7 垦利9-1北-3定向探井BIODRILL S合成基钻井液性能

井深/ m	FV/ s	ρ/ g·cm^－3	PV/ mPa·s	YP/ Pa	YP/PV/ Pa/mPa·s	φ₆/φ₃	Gel/ Pa/Pa	碱度	FL_HTHP/ mL	ES/ V
837	50	1.18	11	9.5	0.86	10/9	9/11	3.0	2.8	660
1280	48	1.18	11	8.5	0.77	11/10	8/10	3.0	2.4	990
1474	49	1.20	13	9.0	0.69	12/11	9/11	2.8	2.0	640
1955	56	1.26	17	10.0	0.59	13/12	10/12	2.8	1.8	550
2213	58	1.28	18	11.5	0.64	17/16	12/15	2.8	1.4	590

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