大民屯凹陷沈84-安12区块Es_3层序地层格架及砂体分布规律
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摘要
辽河油田沈84-安12区块为一复杂断块油田,目前已进入开发中后期的高含水阶段。在经典层序地层学理论以及成因地层学分析方法指导下,依据高分辨率层序地层学原理,利用沈84-安12断块内钻井、测井、地震等资料,准确识别出研究区钻井、地震层序界面、湖泛面和基准面升降旋回等层序标志特征,并研究了基准面升降与砂岩分布规律的关系。研究认为:在A/S<1的情况下,砂体往往呈现出接触紧密的带状;而当A/S>1的情况下,沉积区往往呈现砂体不太发育,规模不大,砂体接触面积小,尤其是当A/S很大时,常会出现孤立式的砂体。进一步证实了高分辨率层序地层学在油田开发中的广泛应用前景。
Shen 84-An 12 block of Damintun depression in Liaohe oilfield,as a complicated fault-block reservoir,has enteredinto the high water cut stage of middle-later period of oilfield development. In the guidance of classic sequence stratigraphy theory and analytic method of genetic sequence stra-tigraphy,and on the reference of high-resolution sequence stratigraphy principle,using drilling,logging,seismic data in Shen 84-An 12 block,this paper accurately identified thesequence symbol characteristics of drill sequence boundary,seismic sequence boundary,flooding surface and base-level cycle,studied the relation between the rise and decline ofbase-level and sand rock distribution. The study has shown that sandbody usually appear to be closely-contact zone when A/S<1,and whileA/S>l,the sand body is less de-veloped,small scale and small contact area in the sedimentary region,especially when A/S is large,sandbody appear to be isolated,which has furtherly proved the extensive appli-cation prospect of high-resolution sequence stratigraphy in the oil field development.
Shen 84-An 12 block of Damintun depression in Liaohe oilfield,as a complicated fault-block reservoir,has enteredinto the high water cut stage of middle-later period of oilfield development. In the guidance of classic sequence stratigraphy theory and analytic method of genetic sequence stra-tigraphy,and on the reference of high-resolution sequence stratigraphy principle,using drilling,logging,seismic data in Shen 84-An 12 block,this paper accurately identified thesequence symbol characteristics of drill sequence boundary,seismic sequence boundary,flooding surface and base-level cycle,studied the relation between the rise and decline ofbase-level and sand rock distribution. The study has shown that sandbody usually appear to be closely-contact zone when A/S<1,and whileA/S>l,the sand body is less de-veloped,small scale and small contact area in the sedimentary region,especially when A/S is large,sandbody appear to be isolated,which has furtherly proved the extensive appli-cation prospect of high-resolution sequence stratigraphy in the oil field development.
引文
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[2]邓宏文,王洪亮.层序地层基准面的识别、对比技术及应用[J].石油与天然气地质,1996,17(3):177-184
[3]徐安娜,郑红菊,董月霞,等.南堡凹陷东营组层序地层格架及沉积相预测[J].石油勘探与开发,2006,33(4):437-443
[4]赵澄林,朱平.高邮凹陷高分辨率层序地层学及储层研究[J].北京:石油工业出版社,2001:19-23
[5]汤军.基于沉积基准面概念的层序划分[J].石油地质与工程,2006,20(4):7-9
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