GEOCHEMICAL CHARACTERISTICS OF SOURCE ROCKS AND ITS HYDROCARBON GENERATION POTENTIAL IN THE DUNHUA BASIN
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摘要: 敦化盆地为一中新生代断坳叠合型裂谷盆地,至今勘探程度极低,为搞清其烃源岩地球化学特征及其生烃潜力,在地震地质综合研究基础上,通过系统分析化验法及地震地质生烃模拟法研究表明:盆地发育下白垩统、古近系、新近系3套湖相烃源岩,前两者为主力烃源岩,新近系下段仅为低成熟烃源岩;其中,下白垩统烃源岩分布面积342 km2,平均有效厚度约300 m,有机碳含量为2.11%～3.88%,类型为Ⅱ2—Ⅲ型,Ro值0.8%～1.3%;古近系烃源岩在北部凹陷分布面积430 km2,平均有效厚度约400 m,有机碳含量为2.98%～4.18%,类型为Ⅱ2—Ⅲ型,Ro值0.5%～1.2%,二者均为成熟优质烃源岩。盆地油气总资源量约1.24×108 t,表明本区具备形成中小型油气田的物质条件,具有较好的油气勘探前景。Abstract: The Dunhua Basin is a Mesozoic and Cenozoic rift basin with superimposed fault-depression in eastern China.Its exploration level is very low.To understand its geochemical characteristics and hydrocarbon generation potential,it has been done quantities of experiments by the method of systematic analysis and the simulation of seismic-geology hydrocarbon-generation based on seismic-geology integra-ted research.These investigations indicate that there are three sets of lacustrine source rocks which are developed in the Dunhua Basin:Lower Cretaceous,Paleogene and Neogene.The Lower Cretaceous and Paleogene are major source rocks.The Lower Neogene is only lower mature source rock.The Lower Cretaceous source rock covers an area of 342 km2,the average effective thickness is 300 m,the organic carbon is 2.11%～3.88%,the type is Ⅱ2-Ⅲ,Ro is 0.8%～1.3%.The Paleogene source rocks cover an area of 430 km2,the average effective thickness is about 400 m,the organic carbon is 2.98%～4.18%,the type is Ⅱ2-Ⅲ,Ro is 0.5%～1.2%.They are both matured hydrocarbons.The total resource of oil and gas is about 1.24×108t.It shows that the area has the potential of forming a medium-sized oil-gas field and it has better prospection.
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[1] 罗群.汤原断陷断裂特征与油气成藏的关系[J].新疆石油地质,1999,20(2):90～95. [2] 童亨茂.伊通地堑边界断裂的性质与演化[J].地质力学学报,2002,8(1):35～42. [3] 许浚远.依舒地堑新生代构造演化[J].地球科学,1997,22(4):406～410. [4] 何玉平,刘招君,董清水等.吉林伊通盆地莫里青断陷古近系双阳组储层成岩作用研究[J].古地理学报,2006,8(1):75～82. [5] 杨海波,刘晋威,张立国等.汤原断陷断裂构造特征及油气成藏特点[J].世界地质,2006,25(3):275～281. [6] 马金龙,张宝权.汤原断陷构造沉积特征与油气成藏分布规律[J].石油实验地质,2006,28(3):220～224. [7] 黄志龙,高岗,刘鸿友.伊通地堑天然气地球化学特征与运移效应[J].地质地球化学,2002,30(3):59～63. [8] 杨宝俊,张梅生,王璞珺.中国油气区地质-地球物理解析(上卷)[M].北京:科学出版社,2003.40～126. [9] Magon L B.The petroleum system:from source to trap[J].AAPG Memoir,1994,60:3～24. [10] WHILE.Methods of estimating oil and gas resources[J].AAPG Bulltetin,1979,63:2183～2186. [11] 张玉明.茫汉断陷烃源岩特征及生烃潜力分析[J].天然气工业,2006,26(10):30～32. [12] 王璞珺,程日辉,王洪艳等.松辽盆地滨北地区油气勘探方向探讨[J].石油勘探与开发,2006,33(4):426～431. [13] 许岩,刘立,赵羽君.延吉盆地含油气系统与勘探前景[J].吉林大学学报(地球科学版),2004,34(2):227～230,241. [14] 姚新民,周志祥,裘军跃.延吉盆地石油地质特征初探[J].石油与天然气地质,1991,12(4):464～471. [15] Miao Jianyu,Kou Hansheng,Zhou Lifa,et al.Sedimentary environments of organic matter from Middle Permian source rocks in northern Xinjiang,China[J].Chinese Journal of Geochemistry,2006,25(3):258～265. [16] Zheng Jianjing,Hu Huifang,Sun Guoqiang,et al.Carbon isotopic characteristics of hydrocarbon gases from coal-measure source rocks:a thermal simulation experiment[J].Chinese Journal of Geochemistry,2006,25(2):167～172. [17] Zhu Guangyou,Jin Qiang,Zhang Shuichang,et al.Distribution characteristics of effective source rocks and their control on hydrocarbon accumulation:a case study from the Dongying Sag,Eastern China[J].Acta Geologica Sinica,2004,78(6):1275～1288. [18] 柳光弟,李剑,高岗.中国陆相烃源岩液态烃产率模拟试验[J].石油学报,2005,26(增刊):55～57,63. [19] 刘华,李凌,吴智平.胶莱盆地烃源岩分布及有机地球化学特征[J].石油实验地质,2006,28(6):574～580,585. [20] 腾格尔,高长林,胡凯等.上扬子东南缘下组合优质烃源岩发育及生烃潜力[J].石油实验地质,2006,28(4):359～365 -
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