埕岛东斜坡东营组层序地层特征及油气勘探方向
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摘要
通过岩心、钻井、测井、地震等资料的分析,对埕岛东斜坡东营组进行了层序地层划分,分析了东营组沉积相的构成、演化和分布规律,明确了油藏类型及控制因素。研究表明:东营组分为4个四级层序;发育辫状河三角洲、滑塌浊积扇、低位浊积扇、湖泊及曲流河5种沉积相类型;形成了岩性类和岩性-构造类2个油气富集区,油层主要集中在SQ2上升半旋回和下降半旋回下部及SQ3,油气成藏受控于侵蚀沟谷、断层和坡折带。在此基础上,优选有利勘探层位和区带,进行探井部署,取得了良好的勘探效果,对下步区带勘探工作具有指导意义。
According to the detailed analysis of cores,drilling,well logging data and the interpretation of seismic section,the sequence stratigraphy of Dongying Formation in Eastern Slope Area of Chengdao Oilfield is divided.At the same time,the distribution,evolution and composition of sedimentary facies are analyzed.The main controlling factor of hydrocarbon accumulation and reservoir types are determined.The result indicates that the Dongying formation is divided into four fourth-order sequence.Five kinds of sedimentary systems are identified in this area,which are braided-delta,slumping turbidite fan,low turbidite fan,lacustrine and meandering stream.Two oil and gas regions for lithologic reservoir and lithologic structure reservoir are formed.The hydrocarbons are mainly concentrated in SQ2 rising hemicycle and the lower part of declining hemicycle and SQ3.Hydrocarbon accumulation is controlled by erosion gullies,fault and slope break belt.Based on the above analyses,the favorable exploration horizons and zones are optimized.The deployment of exploration wells produces good exploration results,which can provide reliable evidence for the next exploration.
According to the detailed analysis of cores,drilling,well logging data and the interpretation of seismic section,the sequence stratigraphy of Dongying Formation in Eastern Slope Area of Chengdao Oilfield is divided.At the same time,the distribution,evolution and composition of sedimentary facies are analyzed.The main controlling factor of hydrocarbon accumulation and reservoir types are determined.The result indicates that the Dongying formation is divided into four fourth-order sequence.Five kinds of sedimentary systems are identified in this area,which are braided-delta,slumping turbidite fan,low turbidite fan,lacustrine and meandering stream.Two oil and gas regions for lithologic reservoir and lithologic structure reservoir are formed.The hydrocarbons are mainly concentrated in SQ2 rising hemicycle and the lower part of declining hemicycle and SQ3.Hydrocarbon accumulation is controlled by erosion gullies,fault and slope break belt.Based on the above analyses,the favorable exploration horizons and zones are optimized.The deployment of exploration wells produces good exploration results,which can provide reliable evidence for the next exploration.
引文
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[2]郭川,李国蓉,杨莹莹,等.川东南地区长兴组层序地层与沉积相特征[J].断块油气田,2011,18(6):722-725.
[3]吴因业.陆相盆地层序地层学分析的方法与实践[J].石油勘探与开发,1997,24(5):7-10.
[4]陈效华,高明健.普光地区须家河组储层控制因素研究[J].断块油气田,2011,18(2):169-172.
[5]王培荣,张大江,宋孚庆,等.区分渤中坳陷三套烃源岩的地球化学参数组合[J].中国海上油气,2004,16(3):157-160.
[6]郭涛,傅强,夏庆龙,等.黄河口凹陷沙三中烃源岩特征及地质意义[J].断块油气田,2010,17(6):698-701.
[7]袁向春,钟建华,高喜龙,等.埕岛东斜坡水下扇沉积特征[J].石油与天然气地质,2003,24(2):146-151.
[8]赵澄林,刘孟慧,姜在兴,等.渤海湾早第三纪断陷盆地含油气岩系沉积学及沉积相的基本特征[J].石油学报,1991,12(2):27-32.
[9]信荃麟,朱筱敏,郑清,等.渤海湾盆地下第三系断陷湖盆沉积体系与油气分布[J].石油大学学报:自然科学版,1989,13(5):11-17.
[10]朱现胜.三角洲体系沉积微相的测井识别方法与应用[J].断块油气田,2007,14(5):91-92.
[11]赵红兵,严科.近岸水下扇砂砾岩沉积特征及扇体分布规律[J].断块油气田,2011,18(4):438-441.
[12]何仕斌,朱伟林,李丽霞.渤中坳陷沉积演化和上第三系储盖组合分析[J].石油学报,2002,22(2):38-43.
[13]王英民,金武弟,刘书会.断陷湖盆多级坡折带的成因类型、展布及其勘探意义[J].石油与天然气地质,2003,24(3):199-204.
[14]高平,房倩,王兴武,等.濮卫洼陷构造-岩性油气藏勘探思路与实践[J].断块油气田,2012,19(2):177-181.
[15]高喜龙.埕岛油田东斜坡地震资料特殊处理及储层预测[J].断块油气田,2012,19(1):88-91.
[16]陈新军,汪立君,季东明.利用地震反演技术预测东濮凹陷文243井区储层[J].天然气地球科学,2003,14(5):422-424.
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