新型铝基防塌剂的研制及防塌作用机理

doi:10.7623/syxb201404018

石油学报 ›› 2014, Vol. 35 ›› Issue (4): 754-758.DOI: 10.7623/syxb201404018

新型铝基防塌剂的研制及防塌作用机理

邱正松, 张世锋, 黄维安, 罗曦

中国石油大学石油工程学院山东青岛 266555

收稿日期:2014-01-26 修回日期:2014-05-22 出版日期:2014-07-25 发布日期:2014-08-05
通讯作者: 邱正松，男，1964年8月生，1985年毕业于华东石油学院钻井工程专业，2001年获石油大学（华东）博士学位，现为中国石油大学（华东）石油工程学院教授、博士生导师，主要从事油气井化学工程领域研究。Email：qiuzs63@sina.com
作者简介:邱正松，男，1964年8月生，1985年毕业于华东石油学院钻井工程专业，2001年获石油大学（华东）博士学位，现为中国石油大学（华东）石油工程学院教授、博士生导师，主要从事油气井化学工程领域研究。Email：qiuzs63@sina.com
基金资助:
国家自然科学基金重点项目（No.51034007）、国家自然科学基金项目（No.41072094）和国家重大科技专项（2011ZX05030-005-07，2011ZX05044，2011ZX05001）资助。

A novel aluminum-based shale/mudstone stabilizer and analysis of its mechanism for wellbore stability

Qiu Zhengsong, Zhang Shifeng, Huang Wei'an, Luo Xi

School of Petroleum Engineering, China University of Petroleum, Shandong Qingdao 266555, China

Received:2014-01-26 Revised:2014-05-22 Online:2014-07-25 Published:2014-08-05

摘要/Abstract

摘要：

为了有效阻缓泥岩中压力传递及滤液侵入，提高泥岩井壁稳定性，研制了高效铝基防塌剂腐殖酸-铝（HA-Al）。泥岩压力传递和半透膜效率测试结果表明，腐殖酸-铝较聚合醇、硅酸钠（模数2.8）、沥青更能有效阻缓泥岩中的压力传递，较聚合醇、硅酸钠（模数2.8）更能有效提高泥岩半透膜效率。与其作用后的泥岩样品中传递1 MPa的压差需要约为20 h，较作用前的泥岩（约为1.5 h）有大幅度提高，泥岩两侧的渗透压也由初始的1.28 MPa增至3.60 MPa。借助核磁、扫描电镜（SEM）和能谱测试结果可知，腐殖酸-铝可通过在泥岩表面孔隙中形成团絮状沉淀，对泥岩表层0~1.5 mm范围内孔隙进行充填封堵（封固），封堵层更为致密，腐殖酸-铝是一种高效的封堵防塌剂。

关键词: 腐殖酸-铝, 压力传递, 半透膜效率, 泥岩, 井壁稳定

Abstract:

A novel high-efficiency anti-sloughing agent (shale stabilizer) composed of humic acid and aluminum (HA-Al) was developed for effectively reducing pore pressure transmission and filtrate invasion, further enhancing wellbore stability in shale. The results of pore pressure transmission and semipermeable membrane efficiency tests show that it takes approximately 20 h to transmit 1 MPa pressure difference in shale after HA-Al treatment, which was significantly increased compared with that before HA-Al treatment. The osmotic pressure induced in shale increased from 1.28 before HA-Al treatment to 3.60 MPa after HA-Al treatment, suggesting that HA-Al can more effectively prevent pressure transmission and improve semipermeable membrane efficiency in shale/mudstone than poly alcohol and sodium silicate. Nuclear magnetic resonance, scanning electron microscopy, and energy dispersive spectrometry data show that HA-Al can fill and block (seal) shale pores to the depth of 0-1.5 mm through flocculent precipitation in surface pores, with particularly lower permeability in the blocking layer. In conclusion, HA-Al is a highly efficient blocking anti-sloughing agent for shale/mudstone stabilization.

Key words: HA-Al, pore pressure transmission, semipermeable membrane efficiency, shale, wellbore stability

中图分类号:

TE256

邱正松, 张世锋, 黄维安, 罗曦. 新型铝基防塌剂的研制及防塌作用机理[J]. 石油学报, 2014, 35(4): 754-758.

Qiu Zhengsong, Zhang Shifeng, Huang Wei'an, Luo Xi. A novel aluminum-based shale/mudstone stabilizer and analysis of its mechanism for wellbore stability[J]. ACTA PETROLEI SINICA, 2014, 35(4): 754-758.

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新型铝基防塌剂的研制及防塌作用机理

A novel aluminum-based shale/mudstone stabilizer and analysis of its mechanism for wellbore stability

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