抗高温高密度生物质钻井液体系研究及应用

Research and Application of a High-Temperature Resistant and High-Density Biomass Drilling Fluid System

周启成 梁应红 单海霞 黄桃 国安平 王俊祥

ZHOU Qicheng LIANG Yinghong SHAN Haixia HUANG Tao GUO Anping WANG Junxiang

中石化石油工程钻完井液技术中心, 河南濮阳 457001 中石化中原石油工程有限公司钻井工程技术研究院, 河南濮阳 457001 中石化中原石油工程有限公司西南钻井分公司, 四川成都 611230

Drilling and Completion Fluid Technology Center of Sinopec Oilfield Service Corporation, Puyang, Henan, 457001, China Drilling Engineering and Technology Research Institute, Sinopec Zhongyuan Oilfield Service Corporation, Puyang, Henan, 457001, China Southwest Drilling Company, Sinopec Zhongyuan Oilfield Service Corporation, Chengdu, Sichuan, 611230, China

为了提高抗高温高密度钻井液体系的高温稳定性及环保性能，以自主研发的生物质合成树脂降滤失剂、抑制剂和润滑剂为核心处理剂，对处理剂加量进行优化，构建了抗高温高密度生物质钻井液体系。性能评价结果表明：该体系抗温可达200 ℃，抗1.0%CaCl2污染，岩屑滚动回收率达94.3%，润滑系数≤0.128，生物毒性EC50为89 230 mg/L。现场应用表明，抗高温高密度生物质钻井液具有较好的抗污染能力，在密度达2.55 kg/L、井底温度达140 ℃的情况下其仍具有很好的流变稳定性能。抗高温高密度生物质钻井液促进了生物质资源在钻井液领域的利用，解决了高密度水基钻井液抗温性与环保性相矛盾的问题，具有较好的现场推广应用价值。

In order to improve the temperature stability and environmental protection performance of a high-temperature resistant and high-density drilling fluid system, the self-developed filtrate reducers, inhibitors, and lubricants with biomass synthetic resin were taken as the core treatment agents, the dosages of the treatment agents were optimized, and a high-temperature resistant and high-density biomass drilling fluid system was constructed. The performance evaluation results showed that the system could resist temperature up to 200 °C. It also could resist CaCl2 pollution of 1%. The rock cuttings rolling recovery was 94.3%, with the lubrication coefficient ≤ 0.128. The biological toxicity EC50 value was 89 230 mg/L. The field application showed that the high-temperature resistant and high-density biomass drilling fluids could significantly resist pollution. They had excellent rheological stability when the density was up to 2.55 kg/L and the bottom hole temperature was 140 °C. The high-temperature resistant and high-density biomass drilling fluids can promote the utilization of biomass resources in the drilling fluid field and solve the trade-off between the temperature resistance and environmental protection of high-density water-based drilling fluids. Therefore, the drilling fluids have positive field promotion and application value.

中国石化集团公司科技攻关项目“抗温抗盐生物质合成树脂降滤失剂研制”（编号：JP18038-1）、中石化石油工程公司科技攻关项目“水基钻井液用生物质合成树脂降滤失剂研制”（编号：SG19-82K）资助

https://doi.org/10.11911/syztjs.2022109