盆地模拟技术研究Aryskum凹陷侏罗系油气藏生烃史  

Aryskum depression Jurassic hydrocarbon reservoirs history study based on basin modeling techniques

作　　者：乔彦国[1,2] 李瑞[1,2] 左毅 王桂芳 

机构地区：[1]成都理工大学油气藏地质及开发工程国家重点实验室,四川成都610059 [2]成都理工大学地球物理学院,四川成都610059 [3]中国石油吐哈油田勘探开发研究院海外研究中心,新疆维吾尔自治区哈密839000

出　　处：《计算机与应用化学》2014年第6期648-654,共7页Computers and Applied Chemistry

基　　金：国家自然科学基金资助项目(41304080)

摘　　要：盆地模拟技术是以系石油地质机理为建模基础,将复杂的石油地质过程模型化、定量化,实现盆地三维动态分析模拟的方法.随着南图尔盖盆地侏罗系油气藏勘探工作的深入,有必要对侏罗系烃源岩生、排烃史、充注期次、运聚方向以及与各期圈闭的匹配关系进行解析.本次研究在油气地质综合研究和油气分析测试资料基础上,借助盆地模拟技术对油气藏热史、生排烃史等过程进行模拟,研究凹陷不同构造部位烃源岩生排烃门限以及不同排烃期次对油气成藏的贡献.油气盆地数值模拟是基于石油地质机理定量模拟坳陷地史、热史、生排烃史的技术,广泛应用于沉积演化、古地温、成熟度、油气生成过程模拟等方面,其研究过程包括：（1）建立地质模型,包括沉积特征、埋藏沉积规律等;（2）研究盆地地层经历的温度的演化;（3）模拟烃源岩生油生气过程,即生烃史模拟;（4）对烃源的排烃历史进行研究,包括油气运移和聚集等.研究结果表明,研究区侏罗系干酪根主要为腐泥-腐殖型、腐殖型,源岩总体处在未熟～成熟阶段.研究区的地温梯度均呈渐增趋势,侏罗纪时约为2.5℃/100 m左右,至现今为3.0℃/1 00m左右.研究区抬升前到达成熟的门限最大古埋深大致为2450 m-2500m,到达大量生排烃的门限深度大致为2800m.生烃总体表现为两期,前期规模远大于后期.Geological basin modeling technology is based on the petroleum geology mechanism simulate the complex geological processes with modeling,quantitative,three-dimensional dynamic analysis method It is necessary to study Jurassic source rocks expulsion history,times of oil and gas filling and migration direction and the relationship of source-reservoir-caprock with the developing of South Turgai depression reservoir exploration work.The study based on oil and gas geological research and oil and gas test data analysis,simulated oil and gas reservoirs thermal history,hydrocarbon generation and expulsion history by the means of basin modeling technology,studied hydrocarbon source rocks expulsion threshold and hydrocarbon accumulation contribution at different structural position of the depression.Basin numerical simulation based on geological mechanism of depression quantitative simulate the history of oil,thermal history,the history of hydrocarbon generation and expulsion technology,widely used in sedimentary evolution,paleo-geothermal,maturity,hydrocarbon generation process simulation and other aspects.The research process includes：first established geological models,including sedimentary characteristics,sedimentary burial laws,etc.second,study the evolution of the basin formation temperature experience.Thirdly oil-generating source rocks hydrocarbon generation history simulation.Fourth,the hydrocarbon source expulsion historical research,including oil and gas migration and accumulation and so on.The results show that study area Jurassic kerogen is mainly humus and saprogenic type,source rock is immature.The ancient threshold burial depth before the study area uplift is approximately （2450-2500） m,large number of hydrocarbon generation and expulsion threshold depth is approximately 2800 m.The hydrocarbon performance two stage,and the scale ofpre is much larger than the latter.

关 键 词：盆地模拟 生烃史 热史 

分 类 号：TE12[石油与天然气工程—油气勘探]