近年来中国石化上海海洋油气分公司持续在东海陆架盆地西湖凹陷开展勘探开发实践，面对海上少井少资料带来的地质认识不确定性大，有限平台空间和平台有限辐射范围带来工程工艺上的难题，以及海上油气开发高投资、高风险和西湖凹陷异常复杂油气藏类型等巨大挑战，创新发展了适应海上开发特点的多项工程工艺。海上低渗致密气藏开发技术初步实现了强非均质低渗致密气藏均衡动用；海上零散储量“滚评建”一体化开发技术实现了东海零散储量有效动用与效益开发；老区“滚评调”一体化高效调整技术充分考虑滚动、评价和调整3个目的进行了综合立体部署，实施效果远超预期；海上带水气藏全生命周期提高采收率技术有效控制边底水气藏水侵速度、有效延长了气井的生产寿命；通过这些技术的推广应用，实现了东海陆架盆地西湖凹陷油气增储上产和高效开发，为国内外海上油气田的高效开发提供了借鉴和参考。围绕东海低渗致密储层高效开发、边际零散储量效益动用、常规边底水气藏提高采收率等方面的问题，仍面临理论创新、工艺技术突破等问题和挑战，亟待开展低渗致密气藏高效开发技术、平台周边远距离储量开发工程工艺技术、带水气藏剩余气描述、西湖凹陷多资源立体综合利用等技术的攻关，以期持续推动东海西湖凹陷油气高效高质开发。

In recent years, Sinopec Shanghai Offshore Oil & Gas Company has continuously carried out exploration and development practices in the Xihu Sag of East China Sea Shelf Basin. In the face of high geological uncertainties caused by sparse wells and limited data offshore and engineering difficulties brought by constrained platform space and limited coverage, along with the significant challenges of high investment and high risk in offshore oil and gas development and exceptionally complex reservoir types in the Xihu Sag, multiple engineering technologies tailored to the characteristics of offshore development have been innovatively developed. The development technology for offshore low-permeability tight gas reservoirs has preliminarily achieved balanced production in strongly heterogeneous, low-permeability tight gas reservoirs. The integrated “rolling evaluation and development” technology for offshore scattered reserves has enabled the effective utilization and cost-effective development of scattered reserves in the East China Sea. The integrated and efficient “rolling evaluation and adjustment” technology for mature areas fully considers the three objectives of rolling exploration, evaluation, and adjustment, and achieves a comprehensive and multidimensional deployment, with implementation results far exceeding expectations. The full-lifecycle enhanced oil recovery technology for offshore water-bearing gas reservoirs effectively controls the water invasion rates in edge-bottom water gas reservoirs, and significantly extends the production lifespan of gas wells. The promotion and application of these technologies enables increased oil and gas reserves, production, and efficient development in the Xihu Sag of East China Sea Shelf Basin, providing a reference for the efficient development of offshore oil and gas fields both in China and abroad. For the efficient development of low-permeability tight reservoirs in the East China Sea, effective utilization of marginal and scattered reserves, and enhanced oil recovery in conventional edge-bottom water gas reservoirs, there are still challenges in theoretical innovation and technological breakthroughs. It is urgent to tackle key technical challenges such as efficient development technologies for low-permeability tight gas reservoirs, engineering technologies for long-distance reserve development around platforms, residual gas characterization in water-bearing gas reservoirs, and integrated utilization of multiple resources in the Xihu Sag, with the aim of continuously promoting the efficient and high-quality development of oil and gas resources in the Xihu Sag of East China Sea.