冀中坳陷隐蔽深潜山及潜山内幕油气藏的勘探发现与认识

渤海湾盆地冀中坳陷具有潜山油气藏形成与富集的良好地质条件,已发现了以任丘潜山为代表的一系列大中型潜山油气田(藏)。随着油气勘探程度的不断提高和勘探技术的不断进步,积极预探隐蔽的深潜山及潜山内幕油气藏,又发现了牛东1超高温深潜山油气藏、长3古储古堵潜山内幕油气藏等多个隐蔽的富集高产潜山油气藏,展现出该领域的良好勘探前景。碳酸盐岩深潜山储层物性受埋深影响小、储集物性好,且具有油气早期充注、长期充注和高压充注特点,成藏条件优越;潜山内幕存在多套储盖组合,可以形成多种源山接触方式,输导体系的输导能力与潜山内幕储层物性的耦合关系控制油气成藏。隐蔽的深潜山和潜山内幕油气藏的发现,主要得益于解放思想、精细研究、模式创新和技术进步。

Exploration and Discovery of Subtle Deep Buried Hill and Buried Hill Inner- Curtain Hydrocarbon Reservoir in Jizhong Sag

Jizhong Sag of Bohai Bay Basin has good geological conditions for buried hill hydrocarbon accumulations and abundance. A series of large and medium-size buried hill oil and gas fields （reservoirs）, such as Renqiu buried hill, have been discovered. With the oil and gas exploration degree improved and the exploration technology upgraded, the active efforts for initial exploration of subtle deep buried hill and buried hill inner curtain hydrocarbon reservoirs led to discovery of a number of subtle abundant high-yield buried hill hydrocarbon reservoirs, such as Niudong-1 super-high temperature deep buried hill hydrocarbon reservoir and Chang-2 buried hill inner-curtain hydrocarbon reservoir, revealing a bright prospect for exploration of this field. Less influenced by the buried depth, the carbonate rock deep buried hill reservoir is good for its physical properties and characterized in early hydrocarbon infill, long-period infill and high-pressure infill, with favorable conditions for accumulations. There were a number of reservoir-cap assemblages in the buried hill inner curtain, forming a variety of source- mountain contact patterns, conducting systems, and coupling relations of conductivity and physical properties of buried hill inner-curtain reservoir to control hydrocarbon accumulations. Discovery of subtle deep buffed hill and buried hill inner-curtain hydrocarbon reservoirs is benefited mainly from ideological emancipation, careful study, creative pattern and technological progress.