柴西南地区古—新近系致密油储层特征及有利探区预测

发布时间：2018-01-13 13:05

本文关键词：柴西南地区古—新近系致密油储层特征及有利探区预测　出处：《成都理工大学》2016年硕士论文　论文类型：学位论文

【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,对柴达木盆地西南地区的沉积相特征、烃源岩分布特征及致密储层进行了研究。结合致密油发育的沉积环境、优质烃源岩分布范围及致密储层发育区域,对致密油发育的控制因素进行了分析,进而对研究区致密油的有利勘探区进行了预测,取得以下成果。1.柴西南地区古-新近系主要发育2种沉积体系,在东北部主要发育扇三角洲—湖泊沉积体系;在西南部主要发育辫状河三角洲—湖泊沉积体系。2.储层特征的综合分析认为柴西南地区主要发育两个致密储层分布带:(1)七个泉—砂西—尕斯地区的下干柴沟组上段储层主要为碳酸盐岩型,其岩性为泥晶灰岩,储集空间以晶间孔为主;(2)扎哈泉—乌南地区的上干柴沟组下段储层主要为碎屑岩,岩性为长石岩屑及岩屑长石砂岩为主,储集空间除原生和次生孔外,微孔、纳米孔也比较发育,具有较好渗流能力。3.综合分析岩芯样品的Toc、氯仿沥青“A”、镜质体反射率Ro、干酪根类型以及岩石热解等分析测试结果,将研究区划分出3个优质烃源岩分布区带:(1)上干柴沟组烃源岩主要分布在柴西南地区的红狮凹陷、扎哈泉凹陷及乌南斜坡;(2)下干柴沟组上段烃源岩主要分布在柴西南地区的七个泉—红柳泉斜坡、红狮凹陷、切克里克凹陷、砂西—尕斯斜坡、扎哈泉凹陷和乌南斜坡;(3)下干柴沟组下段烃源岩主要分布在柴西南地区的扎哈泉凹陷和乌南斜坡。
[Abstract]:This paper using sedimentary petrology, lithofacies palaeogeography, petroleum geology, petrology and organic geochemistry theory and method of Southwest Qaidam basin sedimentary facies characteristics, source rock distribution and reservoir are studied. Combined with the sedimentary environment of tight oil development, high-quality hydrocarbon source rocks and dense distribution development of reservoir area, the control factors of tight oil development are analyzed, and favorable exploration areas in the study area of dense oil was predicted, achieved the following.1. in the southwestern Qaidam Basin of Paleogene Neogene mainly developed 2 types of sedimentary system in the northeast of the main fan delta lake depositional system; comprehensive analysis southwest mainly developed Braided River Delta lacustrine depositional system.2. reservoir characteristics that southwestern Qaidam Basin mainly developed two dense reservoir distribution zone: (1) seven spring - sand - West Gas Area of the xiaganchaigou formation reservoir is mainly carbonate rock type, its lithology is micrite, the reservoir space are mainly intergranular pores; (2) on Zaha gancaigou Quan wunanarea group under the reservoir is mainly of clastic rocks, lithology is mainly feldspar and lithic feldspar sandstone. The reservoir space in the primary and secondary pores, micropores, nano hole is relatively developed, has good flow ability.3. comprehensive analysis of cores, Toc, chloroform bitumen "A", Ro vitrinite reflectance, kerogen type and rock pyrolysis analysis of test results, will be divided into 3 divisions of high-quality source rock distribution area with: (1) upper Ganchaigou Formation hydrocarbon source rocks are mainly distributed in the southwestern Qaidam Basin of the Red Lion depression, Zaha springs and sag, Wunan slope; (2) seven spring - Hongliuquan slope upper xiaganchaigou formation hydrocarbon source rocks are mainly distributed in the southwest region, the Red Lion depression, Qiekelike depression, Shaxi - Gasi slope, Zaha springs and sag, Wunan slope; (3) xiaganchaigou formation of hydrocarbon source rocks are mainly distributed in the southwestern Qaidam Basin Zaha Quan sag and Wunan slope.

【学位授予单位】：成都理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：P618.13

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