南海北部陆坡浅水流评估及深水钻井防治措施

发布时间：2018-05-11 10:04

本文选题：深水钻井 + 浅水流　；参考：《中国石油大学学报(自然科学版)》2017年04期

【摘要】：深水钻井中浅水流喷发会对钻井安全产生很大影响。基于浅水流形成条件和南海北部陆坡古地质环境,分析目标海域浅水流的潜在风险。根据水流喷出速率,量化浅水流危害等级,并建立能够模拟浅水流上喷或喷出的数值模拟模型,分析典型工况下浅水流层压力、规模、孔渗条件及钻速对其喷出过程的影响。结果表明:南海北部陆坡存在浅水流形成的古地质条件,但浅水流规模较小,压力系数较低,钻进中发生严重浅水流危害的概率较低;浅水流喷发具有"压力-水瞬间高速释放"的特征;采用低密度海水钻井液钻进,钻遇压力系数为1.15的浅水流层,钻井液停止循环后水流喷出速率和喷出量可达70 m~3/h和60 m~3;浅水流喷发主要受其压力和规模控制。针对目标海域浅水流特征及控制因素,提出了控制浅水流危害的措施。
[Abstract]:The shallow water eruption in deep water drilling has a great influence on the safety of drilling. Based on the formation conditions of shallow water flow and the paleo geological environment in the northern slope of the South China Sea, the potential risk of shallow water flow in the target sea area is analyzed. The effects of shallow water pressure, scale, pore permeability and drilling speed on the eruption process are analyzed. The results show that the paleo geological conditions are formed by shallow water flow in the northern slope of the South China Sea, but the shallow water flow is small, the pressure coefficient is low, and the probability of serious shallow water flow in the drilling is lower, and the shallow water flow has a "pressure water moment". The characteristics of "high speed release", using low density sea water drilling fluid, drilling in shallow water layer with pressure coefficient of 1.15, the flow rate and ejection amount can reach 70 m~3/h and 60 m~3 after the drilling fluid is stopped, and the shallow water flow is mainly controlled by its pressure and scale. The shallow water flow characteristics and control factors of the target sea area are controlled and the control shallow water is put forward. Measures to harm the flow.

【作者单位】：中国石油大学石油工程学院;渤海钻探第五钻井工程分公司;中国石油化工股份有限公司华东油气分公司勘探开发研究院;大港油田采油工艺研究院;
【基金】：国家“973”计划(2015CB251201) 中央高校基本科研业务费专项(15CX05036A)
【分类号】：TE52

【相似文献】