【摘要】 针对冀中坳陷潜山内幕成藏研究中存在的问题,综合钻井、地震、试油、分析化验等技术方法,对潜山内幕寒武系府君山组的构造、岩相古地理、储层、盖层、供烃方式及圈闭类型展开研究。研究认为,冀中坳陷潜山内幕寒武系发育府君山组优质白云岩储层,存在寒武系馒头组—徐庄组盖层和青白口系隔层两套稳定有效的盖(隔)层,组成区内最有利的储—盖—隔组合,具备深源断层纵向输导、近源断层横向输导、源内不整合面输导、断层—不整合面复合输导和断层—高效储层复合阶梯状输导5种供烃方式,形成断块型层状、不整合顺坡、不整合逆坡和断层—不整合复合4种潜山内幕圈闭类型;明确了储层—输导—盖(隔)层是潜山内幕成藏的关键因素。据此评价优选了Ⅰ类勘探区3个、Ⅱ类勘探区2个,指出河西务潜山带、文安斜坡西潜山带—南马庄潜山带和长洋淀潜山带是勘探的有利方向。更多还原

【Abstract】 Cambrian Fujunshan Formation inside the buried hills in Jizhong depression was investigated to the structure, lithofacies palaeogeography, reservoirs, caprocks, hydrocarbon sources and traps using drilling, seismic, well test and laboratory data. The study results show that Cambrian Fujunshan Formation includes good dolomite reservoirs, and two sections of stable and effective caprocks(Cambrian Mantou Formation and Xuzhuang Formation; Qingbaikou mudstone), which constitute the most favorable reservoir-caprock-isolator assemblage; There are five types of hydrocarbon transport systems: vertical hydrocarbon migration from deep source along faults, lateral hydrocarbon migration from near source along faults, hydrocarbon migration inside source along unconformity, hydrocarbon migration along faults and unconformity, and step-like hydrocarbon migration along fault and effective reservoir; 4 types of traps developed: layered fault trap, bedding unconformity slope trap, adverse unconformity slope trap, and fault-unconformity trap. It is concluded that favorable reservoirtransport system-caprock configuration(isolator) is a key factor for hydrocarbon accumulation inside buried hills. Finally, 3 class Ⅰ and 2 class Ⅱ exploration zone are proposed, and several buried hill belts are selected for future exploration, including Hexiwu buried hill belt, Wen’an slope west buried hill belt, Nanmazhuang buried hill belt and Changyangdian buried hill belt.更多还原