Elaborate analysis of reservoirs and study of connectivity in deepwater turbidite sandstone gas reservoir in the eastern South China Sea
There are abundant oil and gas resources in the deepwater area of the eastern South China Sea.The distribution of deepwater gravity flow turbidite sandstone is complex,and the subdivision of sandbody configurations,superimposed patterns of configuration units,and connectivity relationships directly constrain the well placement and gas field development.To address these challenges,this study focuses on the L gas field in the eastern South China Sea.Based on seismic sedimentology methods and employing sedimentation pattern studies,composite channel system configuration,and modeling characterization methods,an analysis of the composite sandbodies formed by deepwater gravity flows in the South China Sea was conducted.A scheme for subdividing composite sandbody configurations in the deepwater gas fields of this region was established.The study also explored the spatial evolution and distribution patterns of single-phase configuration sandbodies.The research findings showed that deepwater turbidite channel system in the deepwater L gas field can be divided into three hierarchical stages—composite turbid bodies,composite channels,and single channel.Within the gas field,four composite channels developed on the plane,with two river channels developed in the longitudinal direction.The sedimentary evolution law inside the composite channels was established,clarifying the connectivity relationships between channels.Combined with dynamic production verification,the rationality of connectivity relationships was confirmed,successfully guiding the deployment of a horizontal well in the adjacent B gas field,achieving a peak daily production of up to 1.3 million cubic meters and satisfactory production results..The research outcomes have certain reference and enlightenment significance for promoting the development and potential exploration of surrounding gas fields.
Pearl River Mouth basindeepwater turbidite sandstonegravity flow depositioncomposite channel systemchannelized lobedeepwater fan
万方数据
维普
