辽河坳陷西部凹陷天然气藏分布特征与成藏模式  

Distribution and Hydrocarbon Accumulation Mode of Natural Gas in the West Depression,Liaohe Basin

作　　者：董甜甜[1] DONG Tian-tian(Research Institute of Liaohe Oil Field Company, CNPC, Panjin, Liaoning　124010)

机构地区：[1]中石油辽河油田勘探开发研究院,辽宁盘锦124010

出　　处：《河北地质大学学报》2017年第3期6-12,共7页Journal of Hebei Geo University

基　　金：国家自然科学基金项目(Nos.41572114;41302110)

摘　　要：辽河盆地西部凹陷油气资源丰富,是典型的油气共生盆地,天然气藏与油藏在分布上有着密切的联系。区域地质分析及油气共生关系表明,研究区天然气藏剖面上具有"广泛发育,类型互补"的特征,由浅及深依次发育纯气藏、溶解气藏、气顶气藏和凝析气藏;而平面上具有"广泛分布,集中成藏"的特征,即油藏区均不同程度的发育有天然气藏,以溶解气和气顶气为主,且气藏具有围绕生烃洼陷成环带状分布的特征。源岩生烃特征、输导体系的空间格架和油气运移过程中的分异作用是形成不同类型天然气藏的主要因素。浅层游离气成藏关键在于良好的盖层;中部气顶气-溶解气成藏关键在于良好的输导体系;深部高成熟天然气成藏关键在于良好的储层。West Depression of the Liaohe Basin possesses abundant oil and gas resources,it is a typical symbioticbasin of oil and gas,and the distribution of natural gas and oil has a close connection.Regional geological analysisand oil/gas symbiotic relationship research show that natural gas has the features of wide distribution and typescomplementary,pure gas reservoir,dissolved gas reservoir,gas cap gas reservoir and condensate gas reservoirdeveloped from the shallow to deep depth,and characterized by wide distribution and concentration accumulation.Gas reservoir developed in varying degrees in the reservoir area,and mainly dissolved gas and gas cap gas,and thegas reservoir developed round the hydrocarbon depression,distributed in annuluses.The hydrocarbon generationcharacteristics of the source rocks,space structure of the translocation system and the differentiation during theoil and gas migration are the main factors for forming different types of natural gas reservoirs.The key elementfor the free gas accumulation in the shallow depth is the excellent seal rock,and the key to gas cap gas-dissolvedgas accumulation in the middle depth is the good translocation system,as well as the excellent reservoir is the keyelement for the high maturity natural gas accumulation in the deep buried depth.

关 键 词：西部凹陷 天然气藏 烃源岩 疏导体系 储层 

分 类 号：TE122[石油与天然气工程—油气勘探]