大庆油田砂岩中自生粘土矿物的研究STUDY ON THE AUTOGENOUS CLAY MINERALS INSANDSTONE OF DAQING OIL FIELD
邢顺全,辛国强
Xing Shunquan & Xin Guoqiang(Institute of Exploration & Development; Daqing PetroleumAdministrative Bureau);
摘要(Abstract)：
采用偏光显微镜下薄片鉴定、X射线衍射定量分析和扫描电镜相结合的综合鉴定方法，着重研究了大庆油田各油层组的含油砂岩中自生粘土矿物的综合鉴定特征，组合及产状，粘土矿物成岩标志以及它们对砂岩储油层的影响。粘土矿物的种类及其在砂岩中的分布和产状常常是影响储油层物性的关键。即使薄薄的孔隙衬层也能堵塞孔隙喉道，使砂岩可能具有高的孔隙度而渗透率极低。粘土矿物晶体具有很强的表面活性，易与孔隙中流体起反应。不同粘土矿物对油层的影响也不同，针对蒙脱石、高岭石、伊利石、绿泥石以及混合层等，提出了改善渗透性所采取的相应措施。砂岩中粘土矿物的研究对于正确评价储集层性质，对于钻井、注水开发、三次采油及油层处理都具有非常重要的意义。
ABSTRACT
The compiehensive identifying characteristics for autogenou clay minerals in oil-bearing sandstones of various formation groups in Daqing Oil Field, the assemblages occurrence and the diagcnetic indicators of the clay minerals as well as their effect on the sandstone reservoirs are studied by using a comprehensive identifying method of thin section analysis under polariscope. X-ray diffraction quantitative analysis in combination with SEM (scanning electron microscope) . Normally the primary factors affecting the reservoir properties are the types of clay minerals and their distributions as well as their occurrence. Pore throats will be blocked up,even if the pore lining is very thin and thus producing a higher porosity but a lower permcability. Having very strong surface activity, crystals of clay minerals tend to react with the fluids in the pores. Different kinds of clay minerals affect oil reservoirs differently. Appropriate measures have been proposed to improve reservoir permeability, directing against various clay minerals such as montmorillonite, kao-linite, illite, chlorite and mixed layers etc. The study on the clay minerals in sandstones is of great significance for evaluating reservoir properties correctly, as well as for drilling, oilfield development with water-flooding, tertiary recovery and reservoir stimulation,
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基金项目(Foundation):
作者(Authors):
邢顺全,辛国强
Xing Shunquan & Xin Guoqiang(Institute of Exploration & Development; Daqing PetroleumAdministrative Bureau);
DOI: 10.19597/j.issn.1000-3754.1987.01.002
参考文献(References)：
- 〔1〕Milson, M.D., and E.D. Pittman, 1977, Authigenic Clays in Sandstones: Recognition and Influence on Reservoir Properties and Falecenvironmental Analysis, Journal of Sedimentary Petrology, Vol. 47. No. 1. P. 3-31.
- 〔2〕Foscolos, A.E., and T.G. Powell. 1979, Catagenesis in shales and occurrence of authigenic clays in sandstones, North Sabine H-49 Well, Canadian Arctic Islands. Canadian Jcurnal of Earth Sciences Vol. 16, No. 6. P. 1300-1314.
- 〔3〕F.J.朗斯塔夫〔加〕编，邢顺全等译：《粘土矿物和资源地质学》，黑龙江科技出版社，1985年3月第63～71页。