一种针对勘探成熟区半潜式井场的快速勘察方法及其应用

A Rapid Survey Method and Application for Semi-submersible Well Site Investigation in Mature Exploration Area

龙黎 刘宾 刘铮 轩义华 薛志刚 孙永全

LONG Li LIU Bin LIU Zheng XUAN Yihua XUE Zhigang SUN Yongquan

中海石油（中国）有限公司 深圳分公司，广东深圳　518067

Shenzhen Branch of CNOOC Ltd., Shenzhen Guangdong 518067, China

近年来，随着南海东部海域勘探投入的持续加大，对井场调查的现场作业效率提出了更高的要求。该方法通过充分借鉴周边已有井场的资料，对位于勘探成熟区浅层地质灾害发生概率较小的半潜式井场，采用如稀疏模拟物探测线密度、削减海底表层取样数等方法优化作业设计方案，重点勘察井位中心附近的区域。应用结果表明：在井场有资料面积减少的情况下，该方法获得的物探数据仍可为半潜式钻井平台的安全作业提供可靠的地质评价资料，大幅度提升了井场调查作业的工作效率。

In recent years, the exploration investment in the eastern South China Sea continues to increase, and higher requirements have been placed on the efficiency of field operations in well site surveys. Based on the available well site investigation information in nearby regions, this method optimized the design plan of the semi-submersible well site investigation in mature exploration area where the probability of shallow layer geological hazards is low by using methods such as reducing the density of simulative geophysical survey line and the amount of the soil sample in seabed. And, the method focuses on surveying the area near the well center. The application results show that this method can still provide reliable geological information for the safe operation of the semi-submersible drilling platform when the data area of the well site is reduced, and greatly improve the efficiency of well site investigation work.

https://doi.org/10.3969/j.issn.1008-2336.2021.01.015