Application of Real-Time Reservoir Delineation Technology While Drilling in Deepwater Extended Reach Wells During Development of E Marginal Oilfield in Pearl River Mouth Basin,South China Sea
LI Yuanyuan
YANG Xiaojiang
HUANG Guoping
HE Lipeng
WEI Xian
Abstract：To address the geological challenges encountered in the development of extended-reach wells in the E marginal oilfield of the Pearl River Mouth Basin,South China Sea,including ambiguous formation interfaces,strong reservoir heterogeneity,and low oil column height,this study innovatively introduced a real-time reservoir delineation technology while drilling based on ultra-deep detection and high-resolution resistivity joint inversion.During the pre-drilling preparation phase,a geological risk mitigation strategy was established through numerical simulation of formation resistivity responses specific to the study area.Throughout the drilling operations,real-time inversion of reservoir roof depth and structural configuration effectively ensured optimal reservoir penetration rate and maintained sufficient oil column height.The results demonstrate that this technology has achieved the first real-time precise identification of five formation interfaces and six thin reservoirs(thickness<2 m)in the South China Sea region.Successful dynamic tracking of high-quality reservoirs(oil column heigh≥8 m)throughout the entire well section was realized,enabling optimized real-time geosteering that facilitated the completion of extended-reach development wells in Asia's deepwater area.The integrated"geology-engineering-economics"development model established by this technology has not only ensured the cost-effective development of the E marginal oilfield but also provides an innovative solution for the economic exploitation of global deepwater marginal oil and gas fields.
Keywords：Deepwater marginal oilfieldUltra-deep boundary detectionUltra-high-resolution boundary detectionJoint inversion
Publication Date：2025-03-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 109-115 )