摘要
为明确海塔盆地中部主要断陷带南一段油气成藏规律,通过油气分布与源-断-势空间匹配关系分析,对研究区南一段断层圈闭的源-断-势控藏作用进行了综合评价。结果表明,源-断-势对海塔盆地中部主要断陷带南一段断层油气成藏具有3个方面的控制作用:1烃源岩区控制着断层油气藏形成与分布的范围;2早期伸展断裂为断层油气聚集提供了遮挡条件;3低势区控制着断层圈闭油气成藏的部位。反向断裂翘倾隆起和洼中隆起是南一段烃源岩生成油气侧向运移的指向区。南一段断层圈闭油气成藏所需的源-断-势控藏作用综合评价值应大于或等于2.63,由此预测得到海塔盆地中部主要断陷带南一段断层油气成藏的有利区主要分布在乌尔逊凹陷苏仁诺尔、乌东斜坡,贝尔凹陷苏德尔特,南贝尔凹陷东次凹、塔南凹陷中次凹的扇三角洲前缘亚相砂体分布区;其次是贝尔凹陷呼和诺仁、塔南凹陷东次凹的扇三角洲前缘亚相砂体分布区。
To study laws of oil and gas accumulation in K1n1 in main central depression zones of Haita basin,based on analysis of oil and gas distribution law,the control effect of fault-trap source rock,fault and potential on oil and gas accumulation in K1n1 in main central depression zones of Haita basin was evaluated comprehensively and quantitatively by analyzing the spatial relation between oil/gas distribution,source rock,fault and potential. The result indicates that the control effects of source rock,fault and potential on oil and gas accumulation in K1n1 in main central depression exist in the following three areas:1areas of source rock control faults-enclosed oil/gas accumulation and its distribution areas;2early-extensional faults provide sealing conditions for faults- enclosed oil/gas accumulation;3 low potential areas control the position of faults-enclosed oil/gas accumulation. The comprehensive evaluation value for control of source rock,fault and potential on oil and gas accumulation in K1n1 of main central depression zones in Haita basin should be more than or equal to 2.63. According to this,favorable areas for oil and gas accumulation in fault trap of K1n1 in main central depression zones of Haita basin were predicted. They distribute mainly in sandbodies of fan delta front in Surennouer,Wudong slope of Wuerxun sag,Sudeerte of Beier sag,east sub-sag of south Beier sag and central sub-sag of Tanan sag;followed by the sandbodies of fan delta front in Hunouren of Beier sag,east sub-sag of Tanan sag.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2015年第6期1-6,共6页
Petroleum Geology and Recovery Efficiency
基金
国家自然科学基金项目"油源断裂转换带优势输导运移油气条件研究"(41372153)
关键词
源-断-势
断层圈闭
综合评价
断层油气藏
南一段
海塔盆地中部主要断陷带
source rock-fault-potential
fault trap
comprehensive evaluation
faults-enclosed reservoir
K1n1
main central depression zones of Haita basin
