遇气自愈合水泥浆体系

赫英状; 步玉环; 柳华杰

doi:10.12358/j.issn.1001-5620.2022.06.012

遇气自愈合水泥浆体系

doi: 10.12358/j.issn.1001-5620.2022.06.012

赫英状^{1, 2, 3,},
步玉环¹,
柳华杰¹

1.
中国石油大学(华东)石油工程学院, 山东青岛 266580
2.
中国石化西北油田分公司石油工程技术研究院, 乌鲁木齐 830011
3.
中国石化缝洞型油藏提高采收率重点实验室, 乌鲁木齐 830011

基金项目: 中国石化重点科技项目群“顺北特深层断裂破碎带区块安全成井关键技术”（PE19004）

详细信息

作者简介:
赫英状，1988年生，在读研究生，现在主要从事固井水泥浆体系与固井工艺研究。电话18160698843；E-mail：heyz.xbsj@sinopec.com

中图分类号: TE256.3
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出版历程
- 收稿日期: 2022-05-20
- 修回日期: 2022-06-23
- 刊出日期: 2022-11-30

Research and Field Test of Self-Healing Cement Slurry for Gas

HE Yingzhuang^{1, 2, 3
,},
BU Yuhuan¹,
LIU Huajie¹

1.
School of Petroleum Engineering in China University of Petroleum(East China), Qingdao, Shandong 266580
2.
Petroleum Engineering Technology Research Institute, Northwest Oilfield Company, Sinopec, Urumqi, Xinjiang 830011
3.
Key Laboratory of Enhanced Recovery for Fracture-cave Oil Reservoir, Sinopec, Urumqi, Xinjiang 830011

摘要

摘要: 针对顺北油气田凝析气藏在生产期间产生的微裂隙和微环隙，研制了适用于顺北油气田的遇气自愈合乳液，该乳液遇天然气体积膨胀率达30%，并配制出了密度范围在1.45～2.20 g/cm³的自愈合水泥浆体系。该水泥浆体系的适用温度在90～180 ℃，弹性模量小于7 GPa。同时，还设计了合理的水泥石遇气自愈合能力评价方法，通过首次造缝和二次造缝，水泥石的自愈合能力分别达到了100%和95.1%。研制的遇气自愈合水泥浆体系兼具自愈合能力和优异的弹性性能，已现场试验3口井，固井质量优质率为100%，满足了顺北油气田高温高压气井长期密封需要。
- 固井 /
- 自愈合水泥浆 /
- 天然气 /
- 顺北油气田 /
- 微裂隙
Abstract: The micro crack and micro annular gap are inevitable during the production of condensate gas reservoir in Shunbei oil & gas field, but the existing self-healing agent has low temperature resistance, and the evaluation method of self-healing ability is very different from the downhole working conditions. So it can not be applied to Shunbei oil & gas field. A self-healing emulsion in gas suitable for Shunbei oil & gas field is developed, with the volume expansion rate in gas reaches 30%. This agent can prepare self-healing cement slurry with density range of 1.45-2.20 g/cm³, which is suitable for 90-180 ℃, with low modulus of elasticity <7 GPa. At the same time, a reasonable evaluation method for the self-healing ability of cement in gas is devised. Through the first and second artificial fractures making, the self-healing ability of cement paste is 100% and 95.1% respectively. At present, the self-healing cement slurry for gas has been tested in 3 wells, and the high quality rate of cementing quality is 100%, which meets the needs of long-term sealing of HTHP gas wells in Shunbei oil & gas field.
- Cementing /
- Self-healing cement slurry /
- Gas /
- Shunbei oil & gas field /
- Evaluation method for the self-healing ability

HTML全文

图 1 遇气自愈合乳液吸气后的膨胀率

下载: 全尺寸图片幻灯片

图 2 高温老化后遇气自愈合乳液吸气膨胀率

下载: 全尺寸图片幻灯片

图 3 水泥石遇气自愈合性能评价装置示意图

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图 4 微裂隙在憋压条件下的自愈合能力（80 ℃×7 MPa）

下载: 全尺寸图片幻灯片

图 5 微裂隙开放气窜通道和微环隙在憋压条件下的自愈合能力（80 ℃、5 MPa）

下载: 全尺寸图片幻灯片

表 1 自愈合水泥浆的主要性能

配方	ρ/ g·cm⁻³	T/ ℃	流动度/ cm	FL/ mL	t_稠化/ min	过渡时间/ min	流动度/ cm	p_{48 h}/ MPa	弹性模量/GPa （48 h）
1^#	1.45	120	24	38	310	8	24	19.3	6.2
2^#	1.60	120	22	40	236	10	22	19.6	6.7
3^#	1.88	90	20	24	300	5	20	28.2	6.8
4^#	1.88	140	20	36	286	2	20	25.2	6.9
5^#	1.88	180	21	42	336	2	21	25.8	6.1
6^#	2.00	180	20	44	276	8	20	19.2	6.8
7^#	2.20	180	20	42	260	3	20	17.2	6.9
注：所有材料加量均为占纯水泥的百分比

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