松辽盆地徐家围子断陷深层区域成岩规律和成岩作用对致密储层含气性的控制
基金项目:

国家自然科学基金项目(40872076)和国家油气资源战略选区调查与评价国家专项(2009GYXQ13)资助

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    摘要:

    为了研究松辽盆地徐家围子断陷深层的区域成岩规律及其影响因素和成岩作用对致密储层含气性的控制,本文进一步细分了成岩阶段,并分别研究了各构造单元的成岩特征,应用流体包裹体均一温度、镜质组反射率、孢粉颜色指数、热解分析、有机酸、X-衍射、普通薄片、扫描电镜、铸体薄片等资料分别划分了各构造单元的成岩阶段。结果表明,徐家围子断陷深层的成岩作用具有“隆起区较强、坳陷区较弱”的成岩规律,断陷中部的隆起区抬升剥蚀幅度大、地温梯度高、时代相对较老,成岩作用强;断陷两侧的坳陷区抬升剥蚀幅度小、地温梯度低、时代相对较新,成岩作用弱。储层的成岩作用对致密储层的含油气性具有明显的控制作用,砂岩、砾岩工业气层的勘探下限分别为中成岩阶段B1期和晚成岩阶段A期对应的深度。

    Abstract:

    To study the diagenetic regularity and influencing factors as well as control action of diagenesis on the gas-bearing situation of the tight reservoirs in the deep Xujiaweizi Depression,Songliao Basin,diagenetic characters of each tectonic unit were studied.Furthermore,diagenetic stages of clastic rocks in each tectonic unit were divided respectively by using the data of fluid inclusions homogenization temperature,Ro,TAI,Rock-Eval,organic acids,XRD,thin section,SEM,blue epoxy resin-impregnated thin sections.As the results show,the diageneses in the uplift of Xujiaweizi Fault Depression are more intense than those of the depressions in Xujiaweizi Fault Depression at the same depth,because the eroded strata in the uplift are thicker than those of the depressions,the thermal gradients in the uplift is higher than those of the depressions,and the strata in the uplift is younger than those of the depressions.Diageneses control the gas-bearing situation of the tight sandstones and conglomerates very much.The sandstones can produce commercial gas flows in the sub-period B1 of middle diagenetic sage,whereas the conglomerates can produce commercial gas flows until in the period A of late diagenetic stage.

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孟元林,胡安文,乔德武,解习农,潘雪梅,王建伟,田伟志.2012.松辽盆地徐家围子断陷深层区域成岩规律和成岩作用对致密储层含气性的控制[J].地质学报,86(2):325-334.
MENG Yuanlin, HU Anwen, QIAO Dewu, XIE Xinong, PAN Xuemei, WANG Jianwei, TIAN Weizhi.2012. Regional diagenetic regularity and control action of diageneses on the gas-bearing situation of tight reservoirs of deep Xujiaweizi Fault Depression[J]. Acta Geologica Sinica,86(2):325-334.

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历史
  • 收稿日期:2010-08-09
  • 最后修改日期:2011-10-30
  • 录用日期:2011-11-11
  • 在线发布日期: 2012-01-17