【作者】 李照永；

【导师】 施尚明；

【作者基本信息】 大庆石油学院 ， 矿产普查与勘探， 2005， 硕士

【摘要】 运用层序地层学理论重新对汤原断陷北部进行了地层划分和地层对比。结合前人构造和烃源岩研究成果,对目的层沉积特征、储层物性特征等天然气成藏条件进行了系统的研究。对有利勘探区块中的吉祥屯与互助村地区进行了详细的地质分析,计算了吉祥屯构造中两个气藏天然气的探明储量 通过层序地层的划分和对比,目前发现的产气层位均发育在层序地层Ⅱ中。层序Ⅱ发育为单一的湖泊收缩体系域,由两个向上变粗的进积式准层序组构成。岩性特征主要是灰白色中、细砂岩和灰色、黑色泥岩互层。气层发育在准层序组上部的砂岩储层。含气砂层主要是以扇三角州的水下河道砂体为主。研究区内的扇三角州具有物源近、河流短、坡度大、水下河道发育的特点。储层砂体非均质性强、横向对比追踪性差。断裂作用在汤原断陷北部的演化、沉积、气藏形成与保存过程中起着主导作用。研究区断裂构造复杂,断裂活动期次多、断距差异大,不同期次的断裂将研究区切割得十分破碎,使保存下来的气藏变得零星而复杂。详细分析了吉祥屯地区和互助村地区的烃源岩条件、储层条件和盖层条件。确定了吉祥屯、互助村气藏类型和气藏参数。在地质研究基础上,计算了吉祥屯气藏的天然气静态探明储量和动态储量。通过多种储量计算方法的对比,结合研究区实际情况优选出适合本区的储量计算方法。结合实际资料构建了储量计算参数、并进行了不同方法的储量验证计算。为气藏的进一步开发开采提供了依据。更多还原

【Abstract】 Stratigraphical classification and correlation have been done again by the theory of sequence of stratigraphy. With the previous study result of tectonic and source rock, nature gas generating conditions such as sedimentary features , physical properties of reservoir and so on have been researched. Jixiangtun and Hulicun of more favorite zone have been made detail geological analysis, calculated nature gas proved reserves of Jingxiangtun area. By stratigraphical classification and correlation, now discovered gas generation layers are all developed in sequence strata Ⅱ. Sequence Ⅱi s single lake contract systems tracts, composed of two progressive parasequence sets thicker upper. Lithological properties are primary interbed of ashen middle or fine-grain sandstone and ashen or black mud-stone. Gas beddings develop in the sandstone reservoirs of top of parasequence sets. Sandstone reservoirs hold gas are mainly fan-delta under-water channel sand-body. In the region ,fan-delta has properties such as near provenance ,short river ,steep slope, well developed grand channel. The sand-body of reservoirs is high heterogeneity and low lateral correlation tracing property. Faulting plays an important part in the evolution, deposition, gas-pool generation and reservation of northern of Tangyuan rift. In the region faulting structures are complex, movement stage of fault is much, difference of interval is big, fractures in different stage set the region broken, as the result, the gas-pools reserved are odd and complex. Condition of source rock ,reservoir and seal bedding have been studied detailed with Jixiangtun and Huzhucun area, determined type and parameters of gas-pool in Jixiangtun and Huzhucun area, calculated the proved reserve and dynamic recoverable reserve of gas-pool, and proved the reserves by different methods.更多还原