深井超深井钻井堵漏材料高温老化性能评价

doi:10.7623/syxb201902010

石油学报 ›› 2019, Vol. 40 ›› Issue (2): 215-223.DOI: 10.7623/syxb201902010

深井超深井钻井堵漏材料高温老化性能评价

康毅力¹, 王凯成¹, 许成元¹, 游利军¹, 王立民¹, 李宁², 李家学²

1. 西南石油大学油气藏地质及开发工程国家重点实验室四川成都 610500;
2. 中国石油塔里木油田公司新疆库尔勒 841000

收稿日期:2018-03-19 修回日期:2018-12-30 出版日期:2019-02-25 发布日期:2019-03-05
通讯作者: 康毅力,男,1964年2月生,1986年获大庆石油学院学士学位,1998年获西南石油学院博士学位,现为西南石油大学教授、博士生导师,主要从事储层保护理论与技术、非常规天然气、油气田开发地质研究与教学工作。Email:cwctkyl@163.com
作者简介:康毅力,男,1964年2月生,1986年获大庆石油学院学士学位,1998年获西南石油学院博士学位,现为西南石油大学教授、博士生导师,主要从事储层保护理论与技术、非常规天然气、油气田开发地质研究与教学工作。Email:cwctkyl@163.com
基金资助:
国家自然科学基金项目"基于逾渗和固液两相流理论的裂缝性储层工作液漏失损害预测与控制"(No.51604236)；四川省应用基础研究项目"保护储层并改善优势天然裂缝导流能力的钻井预撑裂缝堵漏基础研究(2018JY0436)"和非常规油气层保护四川省青年科技创新研究团队项目(2016TD0016)资助

High-temperature aging property evaluation of lost circulation materials in deep and ultra-deep well drilling

Kang Yili¹, Wang Kaicheng¹, Xu Chengyuan¹, You Lijun¹, Wang Limin¹, Li Ning², Li Jiaxue²

1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Sichuan Chengdu 610500, China;
2. PetroChina Tarim Oilfield Company, Xinjiang Korla 841000, China

Received:2018-03-19 Revised:2018-12-30 Online:2019-02-25 Published:2019-03-05

摘要/Abstract

摘要：

深井超深井钻进裂缝性油气层极易发生频繁的钻井液漏失,造成严重储层损害和重大经济损失。储层段钻进过程中经常发生重复性漏失,意味着仅用酸溶率、粒度分布等常规堵漏材料评价指标已不能满足钻井液漏失控制工程需要。笔者以塔里木盆地克深气田钻井常用的核桃壳、毫米级碳酸钙为研究对象,开展了堵漏材料高温老化评价实验。实验评价结果表明,在180℃的柴油中老化24 h后,核桃壳的颜色由黄色变成黑色,质量损失率为25.16 % ,摩擦系数下降28.24 % ,抗压强度下降21.21 % ;毫米级碳酸钙的颜色由白色变成淡黄色,质量损失率为2.47 % ,摩擦系数下降1.33 % ,抗压强度基本不变;由高温老化后的核桃壳和毫米级碳酸钙所形成的封堵层,其承压能力下降了48.84 % 。分析指出,堵漏材料高温老化失效是深井超深井裂缝封堵层结构破坏并在储层段发生重复性漏失的一个重要因素。

关键词: 储层损害, 漏失控制, 裂缝封堵层, 堵漏材料, 高温老化, 承压能力

Abstract:

Drilling fluid losses always occur in deep and ultra-deep well drilling of fractured reservoirs, which will cause serious formation damage and significant economic losses. Drilling fluid losses often reoccur in the drilling of reservoir section, indicating the evaluation indexes of acid dissolution rate, particle size distribution and etc. for the conventional lost circulation material (LCM)are unable to meet the needs of lost circulation control. The walnut shells and millimeter-scale calcium carbonates often used in Kat gas reservoirs located in Tarim Basin are studied to conduct a high temperature aging experiment on LCM. Experimental evaluation indicates that the walnut shells stay at 180℃ diesel for 24 h, and their color change from yellow to black with the quality, friction coefficient and compressive strength reduced by 25.16 % , 28.24 % and 21.21 % respectively. As the millimeter-calcium carbonates stay at 180℃ diesel for 24 h, their color changes from white to light yellow with the quality and friction coefficient reduced by 2.47 % and 1.33 % respectively, while their compressive strength is almost unchanged; The bearing capacity of the plugged zone formed by high temperature aged walnut shells and millimeter-scale calcium carbonates is reduced by 48.84 % . The analysis demonstrates that the high temperature aging failure of LCM is an important factor for the structure destruction of fractured plugging zone and reoccurring losses in deep and ultra-deep well.

Key words: formation damage, lost circulation control, fractured plugging zone, lost circulation material, high temperature aging, bearing capacity

中图分类号:

TE283

康毅力, 王凯成, 许成元, 游利军, 王立民, 李宁, 李家学. 深井超深井钻井堵漏材料高温老化性能评价[J]. 石油学报, 2019, 40(2): 215-223.

Kang Yili, Wang Kaicheng, Xu Chengyuan, You Lijun, Wang Limin, Li Ning, Li Jiaxue. High-temperature aging property evaluation of lost circulation materials in deep and ultra-deep well drilling[J]. Acta Petrolei Sinica, 2019, 40(2): 215-223.

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深井超深井钻井堵漏材料高温老化性能评价

High-temperature aging property evaluation of lost circulation materials in deep and ultra-deep well drilling

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