摘要
辽中南洼旅大16油田原油具有差异成藏、互补富集的特征。为了分析成藏模式,探寻富集规律,利用原油空间分布特征、地化分析、包裹体测试资料和测井资料裂缝识别等方法和技术,对不同次级构造单元和不同层位的原油特征进行了分析。结果表明:次级构造单元油层分布具有明显的差异性,单走滑主控挤压构造单元油主要富集在下部成藏组合,双走滑主控叠覆伸展构造单元油主要分布于上部成藏组合,上下成藏组合的原油成熟度和来源也具有明显差异;东营组末期沙三段烃源岩成熟,为东三段储层提供油源,明化镇组晚期沙一、二段烃源岩成熟,共同为储层提供原油;断裂活跃区油源断层发育,东一段、东二上亚段为主要含油层,断裂惰性区浅层油源断裂不发育,东三段为主要含油层,多期油气充注和不同断裂特征控制原油富集。
The crude oil in Oilfield Luda 16 of South Liaozhong Sag is characterized by the different accumulation and complementary enrichment. In order to analyze the accumulating model and explore the enriching laws,with the help of the following methods and techniques：the spatial distribution characteristics of the crude oil,geochemical analyses,inclusion test data,fracture identification by the well logging data and so on,the characteristics of the crude oil in different-level secondary tectonic units and different layers were analyzed. The results show that the distributions of the oil layers in the units have obvious difference,the crude oil in the compressional tectonic units mainly controlled by the single slips is generally enriched in the lower combination of the accumulation,the oil in the stacked stretch structural units principally dominated by the double strike slips is mainly distributed in the upper part of the accumulation combination,there are obvious differences in the oil maturity and source for both upper and lower combinations; the hydrocarbon source rocks in Interval Sha Ⅲ in the late period of Dongying Formationhave got mature and been the oil source for Interval Sha Ⅲ reservoirs of Dongying Formation,Interval Sha Ⅰand Ⅱsource rocks are matured in Late Minghuazhen Formation and commonly provide the crude oil for the reservoirs; the oil source faults are well-developed in the active fault zone,Interval East Ⅰ and Upper Sub-interval East Ⅱ are mainly oil-bearing reservoirs,the shallow oil-source faults are not well-developed in the weak fault zone,Interval East Ⅲ is the principal oil-bearing layers,multi-stage oil and gas enrichment and different fault features control the accumulation of the crude oil.
作者
刘丰
吴奎
王冰洁
付蓉
郑彧
LIU Feng WU Kui WANG Bingjie FU Rong ZHENG Yu(Tianjin Branch of CNOOC China Ltd. , Tianjin 300452, Chin)
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2017年第1期1-9,共9页
Petroleum Geology & Oilfield Development in Daqing
基金
国家科技重大专项"近海大中型油气田形成条件与分布"(2011ZX05023-006)
关键词
原油差异
油气成藏过程
强弱走滑特征
辽东湾坳陷
成藏期次
crude oil difference
hydrocarbon accumulation process
strong and weak strike-slip characteristic
Liaodong Bay Depression
accumulation period and time
