【作者】 冉波；

【导师】 刘义坤； 陈振岩；

【作者基本信息】 大庆石油学院 ， 石油与天然气工程， 2008， 硕士

【摘要】 目前国内各大油田经过多年的勘探开发,大型构造油藏以基本勘探完毕。近些年构造-岩性油藏、岩性油藏在探明的年储量构成中所占的比例逐年呈上升趋势。在富油气洼陷周边寻找源内、源边型构造-岩性油藏、岩性油藏已成为石油勘探工作者的共识。辽河坳陷是下第三系含油气富油气凹陷,西部凹陷历经40年的勘探开发已经探明近14亿吨的石油地质储量。随着勘探的深入岩性油气藏已成为下步勘探的重点领域。为了探索陈家洼陷周边岩性油藏的成藏模式,从盆地模拟入手,综合烃源岩、储层、盖层、运移条件、圈闭条件、保存条件等各种因素研究,最终达到资源评价和勘探发现的目的。该研究应用区域地质统层和古生物化石资料建立层序地层格架,应用钻井资料和三维地震资料,配以高精度的合成地震记录进行精细构造解释,落实不同层位的断裂构造特征,运用地震及完钻井资料研究本区的沉积特征,针对该区砂体横向变化大、砂体与油藏关系密切的特点,应用钻井资料和储层反演技术进行储层分布研究,通过构造、砂体、岩芯、试油、成藏规律等分析研究,确定工区油藏分布规律及地质控制因素。通过研究认为,陈家洼陷陈家断裂带沙三、四段地层是岩性油藏发育的有利目标层系。本区沙四段沉积了大量的泥晶白云岩和泥质白云岩等碳酸盐岩储层,并形成了白云岩的特殊岩性油气藏。沙三段主要为陡岸带扇三角洲沉积,物源来自东部的中央凸起,自东向西砂岩逐渐减少,陈家断裂带附近储集相带有利,储层物性好,是成藏的有利相带。该研究探索了陈家断裂带岩性油藏的成藏规律,为下一步勘探指明了方向。更多还原

【Abstract】 With many years of exploration and development by various oil fields in our country, large structural reservoirs have now basically gone through exploration. In recent years, proportion of structural-lithological reservoir and lithological reservoir in proven annual reserves tends to increase year by year. It has become a common view among oil explorers to search for structural-lithological reservoir and lithological reservoir inside and beside source rock in the periphery of oil-gas rich depressions.Liaohe Depression is rich of oil and gas in Eogene,and West Depression has gone through 40 years of exploration and development with proven reserves of nearly 1,400,000,000t. With exploration developing in depth, lithological reservoir has become key concern of next step. In order to explore reservoir-forming style of lithological reservoir in the periphery of Chenjia Sag, we start from basin modeling and integrate studies of source rock, reservoir, cap rock, migration condition, trap condition and preservation condition etc. Finally, the goal of resource evaluation and exploratory discovery is achieved.In this study, sequential formation framework is established using regional geological formation unification and paleontological information. Accurate structure interpretation is conducted using drilling data and 3-D seismic data supplemented by high-precision synthetic seismic records. Fault structure characteristics of different intervals are confirmed. Sedimentary characteristics of this area are studied using seismic and drilled well data. In terms of significant lateral sand variation and close relation between sand and reservoir in this area, drilling data and reservoir inversion technology are used to study reservoir distribution. By studying structures, sands, cores, formation testing and reservoir-forming rule etc, reservoir distribution rule and geological control factors in the work area are identified.Through study it is concluded that S3 and S4 intervals in Chenjia Fault Zone of Chenjia Sag are favorable targets of lithological reservoir. Large amount of carbonate reservoirs such as micritic dolomite and shaly dolomite are deposited in S4 interval of this area resulting in special lithological reservoir of dolomites. S3 interval is mainly composed of steep-coast fan delta deposits. Source area is Central Uplift in the east. Sands gradually decrease from east to west. There are favorable reservoir-forming belts near Chenjia Fault Zone, and reservoir petrophysical property is good. This study investigates reservoir-forming rule of lithological reservoir in Chenjia Fault Zone and provides clear guidance for next step exploration.更多还原