摘要
基于储层沉积学和层序地层学理论,利用测井曲线和岩心资料,研究了黑帝庙油层储层沉积特征和单砂体级沉积微相.结果表明:黑帝庙油层为松辽盆地北部物源控制的湖盆逐渐萎缩背景下形成的河控缓坡三角洲前缘亚相沉积体系,微相类型以水下分流河道、河口坝和远砂坝为主;依据区域性湖泛成因的9套暗色泥岩盖层,把黑帝庙油层垂向上划分为9套储盖组合.沉积微相和24口气显示井综合分析表明:浅层气分布明显受沉积微相控制,气藏主要分布在黑帝庙油层下部的厚层河口坝砂体和远砂坝砂体中;砂体分布、气源断层和构造特征的合理匹配是浅层气富集的关键,研究区气藏类型主要为构造—岩性、断层—岩性气藏.
Heidimiao reservoir of southern Daqing-Placanticline in Songliao Basin has a good potential for shallow gas development. Applying reservoir sedimentology and sequence stratigraphy and based on the logging data of 1,164 wells and cores of 6 wells, we conducted fine researches on depositional features of Heidimiao reservoir and microfacies of single-body class. The study of microfacies shows that Heidimiao reservoir is the gentle river-dominated depositional system of delta front microfacies, which is controlled by sources of northern Songliao Basin and formed on the background of gradual contract. The main microfacies are underwater distributary channels, mouth bars and distal bars. We classified 9 sets of reservoir-seal combinations based on 9 sets of dark mudstones caused by the regional lacustrine flooding. The analysis of microfacies and 24 gas-bearing wells shows the distribution of shallow gas is controlled mainly by microfacies. Shallow gas distributed mainly in thick mouth-bar and distal-bar sandbodies which is at the bottom of Heidimiao reservoir. The good matching of single-sandbody distribution, air-south faults and structure is the dominating control factor of shallow-gas enrichment; structure-lithology and fault-lithology traps are the main types of gas pools.
出处
《大庆石油学院学报》
CAS
北大核心
2009年第3期22-25,52,共5页
Journal of Daqing Petroleum Institute
基金
高等学校博士学科点专项科研基金资助(2006220002)
关键词
大庆长垣南部
黑帝庙油层
沉积微相
储层沉积特征
浅层气分布规律
southern Daqing-Placanticline
Heidimiao reservoir
microfacies
sedimentary feature of reservoir
distribution laws of shallow gas
