海拉尔盆地现今地温场与油气的关系  

Relationship between present geotemperature and hydrocarbon generation in Haila'er Basin

作　　者：崔军平[1] 任战利[2] 苏勇[3] 张盛[2] 刘丽[2] 

机构地区：[1]西北大学大陆动力学国家重点实验室 [2]西北大学地质系 [3]中国石油大庆油田勘探开发研究院

出　　处：《石油勘探与开发》2007年第4期445-450,共6页Petroleum Exploration and Development

基　　金：长江学者和创新团队发展计划项目(IRT0599);高等学校全国优秀博士学位论文作者专项资金(200347)

摘　　要：对海拉尔盆地68口井试油测温资料及30口井连续测温资料进行了研究,分析海拉尔盆地不同构造单元地热梯度及地温平面变化,探讨现今地温场的控制因素及现今地温在油气生成中的作用。海拉尔盆地现今平均地热梯度为3.0℃/100m,大地热流值为55.00 mW/m2,现今地热梯度和大地热流值分布具有南高北低的特点。盆地现今地热梯度和大地热流值低于松辽盆地,现今地温场受地壳厚度、基底结构及盆地构造的控制。海拉尔盆地乌尔逊凹陷为持续埋藏增温型凹陷,现今地温场对有效烃源岩区的分布和油气生成具有明显的控制作用,该凹陷内沉积的铜钵庙组、南屯组、大磨拐河组烃源岩现今地温为烃源岩经历的最高温度,烃源岩现今处于持续生烃阶段,而贝尔凹陷、呼和湖凹陷的古地温高于现今地温,烃源岩生烃过程受古地温控制而不是现今地温。Based on the comprehensive analyses of stratigraphic temperature measurements in the Haila＇er Basin, this paper investigates the present geothermal gradient and heat flow of different units, the controlling factors of the present geothermal field and its function in forming oil and gas. The present geothermal gradient and heat flow are 3.0℃/100m and 55.00 mW/m^2 respectively. They are high in the south and lower in the north, and lower than those of the Songliao Basin. They are controlled by crust thickness, basement topography and basin structure. The Wu＇erxun Sag is a sag with increasing burial and temperature, and the present temperature controls the distribution and oil-gas generation of its effective source rocks. The present temperature is the highest one that the Tongbomiao, Nantun and Damoguaihe Formations have experienced, and the source rocks in them are in the stage of oil-gas generation. In the Bei＇er and Huhehu sags, hydrocarbon generation is controlled by the paleotemperature which is higher than the present one.

关 键 词：海拉尔盆地 现今地温 地热梯度 大地热流 油气生成 

分 类 号：TE121[石油与天然气工程—油气勘探]