赛汉塔拉凹陷滑塌浊积岩的发现与勘探意义
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摘要
通过研究二连盆地赛汉塔拉凹陷中洼槽陡坡带的含鲕粒块状细砂岩从岩性特征、沉积结构及构造特征、粒度特征、测井曲线特征、地震反射特征以及对其形成机理的分析,认为赛83x含油砂岩体为在半深湖—深湖环境形成的滑塌浊积扇沉积。这种类型的滑塌浊积扇具备分选、磨圆度、物性较好等条件,尤其是此类砂岩体往往被形成于深湖—半深湖相还原环境的深灰色、灰黑色泥岩———成熟烃源岩所包围,易形成岩性圈闭,有利于油气的运移和聚集成藏,是断陷湖盆陡坡带油气勘探的重要目标。
Through studying the formation mechanism and the lithology,sedimentary texture,structural attitude,grain feature,logging curve features and seismic reflectance signature of oolite bearing blocklike fine sandstones in the actic region of Saihanlata Depression of Erlian Basin,it is found that the oil-bearing sand bodies in Well S-83x belong to slump turbidite fan deposition formed under semideep lake-deep lake environment.This type of slump turbidite fan sand bodies possess the advantages that delicately sorted and rounded beach and bar sand bodies with good physical properties have,in particular they are usually surrounded by dark grey and dark mudstones formed under reduction environment of deep lake-semideep lake,in other words,surrounded by mature source rocks,and thus are more easily to form lithologic reservoirs.The slump turbidite fan is favourable for oil and gas migration and accumulation hence is an important exploration target in actic region of the faulted lake basin.
Through studying the formation mechanism and the lithology,sedimentary texture,structural attitude,grain feature,logging curve features and seismic reflectance signature of oolite bearing blocklike fine sandstones in the actic region of Saihanlata Depression of Erlian Basin,it is found that the oil-bearing sand bodies in Well S-83x belong to slump turbidite fan deposition formed under semideep lake-deep lake environment.This type of slump turbidite fan sand bodies possess the advantages that delicately sorted and rounded beach and bar sand bodies with good physical properties have,in particular they are usually surrounded by dark grey and dark mudstones formed under reduction environment of deep lake-semideep lake,in other words,surrounded by mature source rocks,and thus are more easily to form lithologic reservoirs.The slump turbidite fan is favourable for oil and gas migration and accumulation hence is an important exploration target in actic region of the faulted lake basin.
引文
[1]赵志刚,李亮,李书民,等.二连盆地赛汉塔拉凹陷构造样式及凹陷成因类型研究[J].大庆石油地质与开发,2005,24(6):11-13.
[2]刘招君.湖泊水下扇沉积特征及影响因素———以伊通盆地莫里青断陷双阳组为例[J].沉积学报,2003,21(1):148-154.
[3]雷怀玉,邹伟宏,王连军,等.岔西地区浊积岩的发现及其油气勘探意义[J].沉积学报,1999,17(1):89-94.
[4]赵澄林,朱筱敏.沉积岩石学(第三版)[M].北京:石油工业出版社,2005.
[5]尹太举,张昌民,李中超.东营凹陷滑塌浊积岩沉积特征及油气藏勘探技术[J].石油与天然气地质,2006,27(1):93-98.
[6]白钢.断陷湖盆陡坡带油气勘探方法探讨———以济阳坳陷埕东断裂带为例[J].石油天然气学报,2005,27(4):426-428.
[7]管穆兰,库国正,尹哲,等.白音查干凹陷构造沉降充填演化与油气关系[J].大庆石油地质与开发,2005,24(3):7-10.
[2]刘招君.湖泊水下扇沉积特征及影响因素———以伊通盆地莫里青断陷双阳组为例[J].沉积学报,2003,21(1):148-154.
[3]雷怀玉,邹伟宏,王连军,等.岔西地区浊积岩的发现及其油气勘探意义[J].沉积学报,1999,17(1):89-94.
[4]赵澄林,朱筱敏.沉积岩石学(第三版)[M].北京:石油工业出版社,2005.
[5]尹太举,张昌民,李中超.东营凹陷滑塌浊积岩沉积特征及油气藏勘探技术[J].石油与天然气地质,2006,27(1):93-98.
[6]白钢.断陷湖盆陡坡带油气勘探方法探讨———以济阳坳陷埕东断裂带为例[J].石油天然气学报,2005,27(4):426-428.
[7]管穆兰,库国正,尹哲,等.白音查干凹陷构造沉降充填演化与油气关系[J].大庆石油地质与开发,2005,24(3):7-10.
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