饶阳凹陷下第三系碎屑岩储集条件分析
- 华北油田勘探开发研究院 任丘 062552
作者简介:
徐志强,男,39岁,高级工程师,石油地质
摘要: 本文根据饶阳凹陷孔隙演化、砂岩粘土矿物演化并结合生油岩演化特征将下第三系砂岩成岩作用划分为三个时期、五个阶段。根据下第三系已钻遇油藏与有机质纵向演化特征,结合压力、砂岩压实、岩芯物性数据对砂岩储层条件进行分析。纵向上确定出各类储层分布规律并对深部储集条件进行预测。
Eogene Sandstone Reservoir Condition Analysis,Raoyang Sag,Jizhong Depression
- Petroleum Exploration and Dvelopment Research Institute North China Petroleum Administration bureau, Renqiu, Hebei 062552
- Rev Recd Date:
1995-07-02
Abstract: Raoyang Sag is located in central part of Jizhong Depression, Bohaiwan basin. Since the discovery of "buried hill" carbonate hydrocarbon reservoir in 1975,overall regional petroleum exploration activities have been carried out. Eogene sandstone reservoirs followed the Yre-Mesozoic carbonates have become the new petroleum exploration targets.This paper has discussed the origin,type,vertical distribution of sandstone reservoir porosity in Eogene in Raoyang Sag. The evolution and vertical distribution of sandstone porosi-ty have been classified into 5 phase through mechanical and chemical diagenesis study:1)Shal-low buried(<2000 m) primary porosity phase,2)Mixed primary and dissoived secondary porosity phass(2000--2800 m),3)Pure dissolved secondary porosity phase ( 2800-4000m),4) Inter crystal residual and dissolved secondary porosity phase (4000-4599 m),and 5)Micro-fissure storage phase (>4500 m). Meanwhile the authors have quantitatively described and predicted the reservoir storage capacity in different porosity evolution stages.Now the discovered hydrocarbon accumulations in Eogene in Raoyang sag are concentrat-ed between 2000-3500 m interval. This study has discussed the existence possibilities of deep buried sandstone hydrocarbon reservoirs:1)Sufficient and abundant hydrocarbon sources.Depth of the maximum hydrocarbon expulsion of Eogene petroleum source rocks in Raoyan ranges from 3800 m to 5300 m,2 ) Deep buried sandstone reservoirs show 'the tendency of ab-normal pressure,which is favorable for the preservation of various origin porosity,3)Corelaboratory analysis data indicate that in deep burial domain,the sandstone reservoirs still pos-sess the storage capability of porosity value 5%15%and permeability value <0. O1一50X10-3.μm2. 4)In deep burial domain(>3800 m ) the content of illite and montmorillonite mixed一layer clay mineral in sandstone bodies has been extinct,but the shale in same burial do- main still posses illite and montmorillonte mixed-layer that has 12%montmorillonite layer,which may bring about the forming of subtle entrapment.
徐志强, 熊明. 饶阳凹陷下第三系碎屑岩储集条件分析[J]. 沉积学报, 1996, 14(2): 95-101.
引用本文: |
徐志强, 熊明. 饶阳凹陷下第三系碎屑岩储集条件分析[J]. 沉积学报, 1996, 14(2): 95-101.
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Xu Zhiqiang, Xiong Ming. Eogene Sandstone Reservoir Condition Analysis,Raoyang Sag,Jizhong Depression[J]. Acta Sedimentologica Sinica, 1996, 14(2): 95-101.
Citation: |
Xu Zhiqiang, Xiong Ming. Eogene Sandstone Reservoir Condition Analysis,Raoyang Sag,Jizhong Depression[J]. Acta Sedimentologica Sinica, 1996, 14(2): 95-101.
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