松辽盆地北部古中央隆起带天然气地球化学特征及成藏条件  

Geochemical characteristics and reservoir forming conditions of the natural gas in the paleo central uplift zone in the northern Songliao Basin

作　　者：张帆[1,2] 冉清昌 吴玉明[1,2] 任志高[1,2] Zhang Fan;Ran Qing-chang;Wu Yu-ming;Ren Zhi-gao(Exploration and Development Research Institute of Daqing Oil Field CompanyLtd.,Daqing 163712,China;Key Laboratory for the Research of Dense Oil and Mudstone Oil Accumulation in Heilongjiang Province,Daqing163712,China)

机构地区：[1]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712 [2]黑龙江省致密油和泥岩油成藏研究重点实验室,黑龙江大庆163712

出　　处：《天然气地球科学》2019年第1期126-132,共7页Natural Gas Geoscience

基　　金：国家科技重大专项(编号:2011ZX05003-002)资助

摘　　要：松辽盆地北部古中央隆起带勘探程度低,天然气成藏条件认识薄弱,但勘探潜力不容忽视,是大庆油田重要的资源接替领域。通过同位素、包裹体等地球化学实验数据分析和地质综合研究,首次开展了古中央隆起带天然气地球化学特征及成藏条件的系统研究。结果表明:研究区不发育烃源岩,气源来源于沙河子组烃源岩;成藏期为烃源岩生排气初期,先充注油藏,然后裂解为气藏。最后进一步指出古中央隆起带基岩为油气优势运聚地区,具备天然气成藏条件,可作为松辽盆地深层天然气下步勘探的重点领域。The paleo-central uplift belt in northern Songliao Basin has a low degree of exploration and weak understanding of reservoir-forming conditions,but its exploration potential cannot be ignored,and it is an important resource replacement area in the Daqing Oilfield.Based on the analysis of geochemical experimental data such as isotopes and inclusions and comprehensive geological studies,a systematic study on the geochemical characteristics and reservoir forming conditions of natural gas in the paleo-central uplift zone has been carried out for the first time.It revealed that there are no source rocks in the study area,and the gas source comes from the source rocks of Shahezi Formation.It is cleared that the initial stage of hydrocarbon generation and expulsion is the stage of reservoir formation,first filling the oil reservoir and then cracked into gas reservoir.It is pointed out that the bedrock in the paleo-central uplift zone is the predominant area for hydrocarbon migration and accumulation,and possesses the conditions for gas accumulation,which can be used as the key area for next step deep gas exploration in Songliao Basin.

关 键 词：古中央隆起带 基岩 天然气组分 碳同位素 烃源岩 包裹体 成藏时间 运聚方向 

分 类 号：TE122.113[石油与天然气工程—油气勘探]