化学充氮泡沫水泥浆制备原理与应用

王翔; 王星星; 王成文; 张辉

doi:10.3969/j.issn.1001-5620.2018.04.018

化学充氮泡沫水泥浆制备原理与应用

doi: 10.3969/j.issn.1001-5620.2018.04.018

王翔¹,
王星星²,
王成文^2, ,,
张辉¹

1. 中石化华北油气分公司石油工程技术研究院, 河南郑州 450006;
2. 中国石油大学(华东)石油工程学院, 山东青岛 266580

基金项目:

国家科技重大专项项目“滇东黔西煤层气开发技术研究及先导性试验”（2016ZX05044）；“低丰度致密低渗油气藏开发关键技术”（2016ZX05048）资助。

详细信息

作者简介:
王翔,高级工程师,1981年生,主要从事油气井钻完井工程的科研与管理工作。

通讯作者:
王成文,博士生导师,1975年生,主要从事油气井固完井工程、油田化学等研究工作。E-mail:wangcw@upc.edu.cn

中图分类号: TE256.6
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出版历程
- 收稿日期: 2018-01-05
- 刊出日期: 2018-07-30

Preparation and Application of Chemically Nitrogen Filled Foamed Cement Slurry

1. Research Institute of Petroleum Engineering Technology of Sinopec North China Oil and Gas Company, Zhengzhou, Henan 450006;
2. School of Petroleum Engineering, China University of Petroleum, Qingdao, Shandong 266580

摘要

摘要: 水泥浆漏失低返是国内外低压易漏、裂缝性油气藏固井普遍存在且尚未完全解决的技术难题，泡沫水泥浆是解决固井漏失的一项重要技术。针对化学充氮泡沫水泥浆制备原理尚不清楚、化学发气剂效率低等问题，根据化学热力学和电化学理论，揭示了化学法充氮的原理，研发出高效发气剂LTPN体系。该体系具有发气率高、对水泥浆稠化时间和抗压强度基本无影响的特点，与动物蛋白复合稳泡剂、纳米增强剂等配合使用，可使泡沫水泥浆密度降低至0.95 g/cm³。通过探讨发气剂在水泥浆中的化学充氮规律，研发出高性能化学充氮泡沫水泥浆NFLC体系，经过30余口井固井试验表明，NFLC体系解决了煤层气井固井面临的低压、裂缝性漏失难题，保证了煤层气井水泥浆返高，提高了固井质量，一次性上返到设计高度，固井优质率大于90%，对山西沁水盆地的低压、裂缝性煤储层具有优良的防漏堵漏效果，为低压、裂缝性油气藏固井提供了一种有效的解决方法，具有良好的应用推广价值。
- 泡沫水泥浆 /
- 化学充氮 /
- 固井 /
- 低密度水泥浆 /
- 抗压强度 /
- 现场试验
Abstract: Loss of cement slurry into fractured formations is a problem often encountered and remained partially unresolved in cementing low pressure, fractured petroleum reservoirs. Foamed cement slurry, such as the chemically nitrogen filled foamed cement slurry is often used in dealing with this problem. Presently, the mechanisms of preparing the chemically nitrogen filled foamed cement slurry is not clear, and the efficiency of the chemical gas formers used is low. In this study the mechanisms of chemical nitrogen filling are revealed based on chemical thermodynamics and electrochemistry. A high efficiency gas former, LTPN, has been developed in preparing chemically nitrogen filled foamed cement slurry. LTPN basically does not affect the thickening time and compressive strength of cement slurry. When used in combination with animal protein foam stabilizer and nano foam enhancer, LTPN is able to reduce the density of cement slurry to 0.95 g/cm³. By extensively studying the chemical nitrogen filling pattern of gas formers in cement slurry, a high performance chemical nitrogen filled foamed cement slurry NFLC was developed. Cement operations of 30 wells have proved that NFLC is able to resolve problems encountered in cementing low pressure, fractured reservoirs. The cement slurry return height in cementing coalbed methane well with the NFLC cement slurry meets the designed requirements. In cementing the low pressure, fractured reservoir in Qinshui basin, Shanxi, cement slurry loss was avoided successfully, and the cement slurry returned to the designed height in the first try. 90% of the well was cemented with high quality. The chemically nitrogen filled foamed cement slurry has provided an effective way of cementing low pressure, fractured reservoirs, and has good application prospect.
- Foamed cement slurry /
- Chemical nitrogen filling /
- Well cementing /
- Low density cement slurry /
- Compressive strength /
- Field test

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参考文献(13)

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