地震调查技术突破南黄海海相中—古生界成像技术瓶颈

摘要

南黄海盆地普遍存在的高速屏蔽层导致海相中—古生界地震资料品质差,甚至无反射资料,严重阻碍深部油气勘探进展.历经十多年探索,通过深入的理论计算及模拟、长期的海上试验及多轮处理技术攻关形成的"高富强"地震调查技术突破了南黄海海相中—古生界地震成像瓶颈."高富强"地震调查技术分为采集和处理两大部分,采集系统以"高覆盖次数、富低频及强能量震源"为主要特色,处理核心技术以获得中—古生界"高信噪比、富低频及强有效反射能量"资料为最终目标.使用该技术在南黄海盆地崂山隆起获得了高品质成像资料,清晰地揭示了海相古生代内部地层结构,最终落实了古生界多个大型圈闭构造和钻探目标,为海域深部油气勘查的战略性发现和突破提供了有效的技术支撑.%Due to the extensive existence of high-velocity shielding layer, the seismic reflection of marine Mesozoic-Paleozoic has poor even no reflection, which hinders the progress of deep hydrocarbon exploration. On the basis of the last ten years' research characterized by in-depth theoretical calculation and simulation, long-term sea trials and several rounds of processing tackling, researchers have founded the "HRS" seismic exploration technology and thus broken through the seismic imaging "bottleneck" of the marine Mesozoic-Paleozoic strata in the South Yellow Sea basin. The "HRS" seismic exploration technology is made of two parts. The seismic acquisition part has the characteristics of high coverage, low-frequency and strong energy source. The key goal of the processing system obtains the effective reflection with high signal-to-noise ratio, rich low frequency and strong amplitude. The seismic data of high quality was acquired with "HRS" technology and internal structure of marine Paleozoic strata was revealed clearly. Finally several large trap structures were found and the drilling targets were determined. The "HRS" seismic exploration technology provides effective technical support for the strategic discovery and breakthrough of oil and gas exploration in the deep part of sea area.