柴达木盆地油砂山—大乌斯地区新近系储层有利区带研究

发布时间：2018-06-01 00:24

本文选题：柴达木盆地 + 油砂山-大乌斯地区　；参考：《成都理工大学》2017年硕士论文

【摘要】：本论文综合运用沉积岩石学、岩相古地理学、石油地质学、矿物岩石学及有机地球化学理论与方法,对柴达木盆地油砂山-大乌斯地区的构造特征、沉积体系演化、储层特征进行了研究。结合油砂山-大乌斯地区的生烃条件、油气运聚条件、成藏特征等因素进行了分析,进而对研究区储层的有利勘探区进行了预测,取得以下成果。1.油砂山-大乌斯地区发育多种沉积成因的碎屑岩储层,主要为一套河湖体系的辫状河三角洲砂岩和滨浅湖沉积的粉~细砂岩储层。2.油砂山-大乌斯构造带沉积中心在各个时期自西向东发生演化和迁移,主要沉积相类型有辫状三角洲平原、辫状三角洲前缘、滨浅湖沉积,水体自上而下、自东到西有逐渐变浅的趋势。3.研究区整体为一缓坡背景之上发育的河-湖沉积体系,沉积相演化上从上干柴沟组至上油砂山组时期,湖盆水体逐渐后退,物源自西北向东南逐渐推进,由上干柴沟时期的工区大面积发育的滨浅湖-半深湖以及滩坝沉积,再到下油砂山时期的三角洲前缘与滩坝沉积,一直到上油砂山期的大面积发育的辫状三角洲前缘沉积和滩坝沉积,滨浅湖沉积环境进一步缩小。4.综合分析有机质丰度,有机质成熟度评价以及岩石热解等分析测试结果,将研究区划分出2个优质烃源岩分布区带:英东二号、英东一号区域是下步储层有利区带勘探目标。
[Abstract]:Based on the theories and methods of sedimentary petrology, lithofacies paleogeography, petroleum geology, mineral petrology and organic geochemistry, the structural characteristics and sedimentary system evolution of the oil-sand mountain and Dausi area in Qaidam Basin are studied in this paper. Reservoir characteristics are studied. Combined with the hydrocarbon generation conditions, hydrocarbon migration and accumulation conditions, reservoir forming characteristics and other factors in the oil-sand mountain-Dausi area, the favorable exploration area of the reservoir in the study area was predicted, and the following results were obtained. 1. There are many depositional clastic reservoirs in the Yeshanshan-Dausi area, mainly composed of braided river delta sandstone of a set of river and lake system and silt / fine sandstone reservoir of shoreline shallow lake deposition. The sedimentary center of the Yeshanshan-Dausi tectonic belt evolves and migrates from west to east in various periods. The main sedimentary facies types are braided delta plain, braided delta front, shoreline shallow lake deposit, water body from top to bottom. From east to west there is a trend of gradual shallowness. The whole study area is a river lake sedimentary system developed on a gentle slope background. During the period of evolution of sedimentary facies from Shangganchaigou formation to the Youshashan formation, the lake basin water gradually retreated and the material originated from the northwest to the southeast. From the deposits of shallow lacustry-semi-deep lake and beach dam developed in large area in Shangganchaigou period to delta front and beach dam deposit in lower oil sand mountain period, A large area of braided delta front and beach dam deposits developed up to the upper oil sand mountain stage, and the sedimentary environment of shoreline shallow lake was further reduced by .4. By synthetically analyzing the results of organic matter abundance, maturity evaluation of organic matter and pyrolysis of rocks, the study area is divided into two zones of high quality source rock: Yindong No.2 and Yindong No.1 are the exploration targets in the favorable zone of the next step reservoir.
【学位授予单位】：成都理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13

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