【作者】 郭精义；

【导师】 王德发；

【作者基本信息】 中国地质大学（北京） ， 矿产普查与勘探， 2006， 博士

【摘要】 胜北洼陷位于吐哈盆地台北凹陷西部,经多年的油气勘探,已发现了葡北、胜北、红连、火北等中新生界构造油气田。但与胜北洼陷石油地质储量相比,这些构造油气田的探明地质储量不足总储量的20%。推测丰富的剩余油气资源蕴藏在岩性等隐蔽性油气藏中。 本文以胜北洼陷层序和沉积体系分析为基础,首次综合地质、地震、测井资料,系统分析了胜北洼陷岩性油气藏的类型及其分布规律,提出了一套适用于胜北洼陷岩性油气藏勘探的技术方法体系,并进行了综合评价和有利勘探方向分析。 通过本论文研究,取得了以下主要成果和认识: 1.胜北洼陷中生界具有形成岩性油气藏的有利沉积条件。中生界在洼陷北部陡坡带发育冲积扇、扇三角洲沉积体系,在南部缓坡带发育河流三角洲沉积体系,这些沉积体系在斜坡部位易形成砂体尖灭,是形成岩性油气藏的基础。 2.胜北洼陷发育有斜坡带前缘砂上超型岩性油气藏、三角洲前缘砂后期掀斜型岩性油气藏和三角洲前缘砂顶超型岩性油气藏等类型丰富的岩性油气藏。 3.提出了运用地震信息多参数综合预测的技术方法识别与评价岩性油气藏。 4.阐明了各类岩性油气藏成藏的主控因素及其分布规律。斜坡带前缘砂上倾尖灭型岩性油气藏主要发育于胜北洼陷南缘火焰山构造带的北斜坡,并沿火焰山构造带呈条带状分布;前缘砂后期掀斜型岩性油气藏主要发育于胜北洼陷西缘葡北构造带的东斜坡,此类岩性油气藏在平面上沿葡北构造带走向方向呈显带状分布的特征;斜坡带前缘砂顶超型岩性油气藏主要发育于洼陷北部胜北构造带的斜坡部位。 5.指出胜北洼陷岩性油气藏研究和勘探存在五个方面的特殊性。 6.指出了三个有利勘探方向:火焰山构造北坡、胜北构造南翼、葡北构造东斜坡。更多还原

【Abstract】 Shengbei sag is located in the west of Taibei depression in Tuha basin. According to many years’ exporation, it is Pubei gas-oil field, Shengbei gas-oil field, Honglian gas-oil field, Huobe gas-oil field which all belong to structural reservoirs that have been discovered. But proved reservoir of these gas-oil fields is less than 20% of total source reservoir.Based on the comprehensive study of sequence stratigraphy and sedimentary system, first through the comprehensive analysis of geology, logging and seismic and so on, it is found that residual abundant gas-oil resource is rich in lithological hydrocarbon reservoir. And types and distribution of Shengbei lithological hydrocarbon reservoir have been analysed, and technology and method of lithological hydrocarbon reservoir exploration have been put forward. At last comprehensive evaluation was finished and favorable exploration direction has been pointed out.Major results include as the following:1. Mesozoic group in Shengbei sag has advantage factor of forming lithological hydrocarbon reservoir. Alluvial fan and fan delta developed in escarp region of the north of the sag, and river-delta farmed in ramp belt of the south. These sediment bodies are characterized by sandstone pinch out, which is the base of lithological hydrocarbon reservoir.2. lithological hydrocarbon reservoir types in Shengbei sag have slope belt frontal sandrock onlap type, delta frontal sandstone anaphase tilted type, and delta frontal sandstone offlap type.3. Method of identifying and valuating of lithological hydrocarbon reservoir is pointed out by multi-parameters of seismic.4. Primary controlling factors and distribution features of every lithological hydrocarbon reservoir type is put forward. Slope belt frontal sandrock onlap type lies in the north slope of Huoyanshan structure in Shengbei sag, which presents ribbon fabric. Delta frontal sandstone anaphase tilted type is in the east slope of Pubei structure belonged to the west of Shengbei sag. Delta frontal sandstone offlap type lies in the slope of Shengbei structure standing in the north of the sag.5. Five special aspects about explorating lithological hydrocarbon reservoir in Shengbei sag are pointed out.6. Three favorable exploration directions are predicted, which are the north slope of Huoyanshan structure, and the south slope of Shengbei structure, and the east slope of Pubei structure.更多还原