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rock Physical Experimental Research in Tanan Volcanic rock Reservoir

Journal of Applied Mathematics and Physics 2014年第6期2卷 284-295页

作者： Lailin Li Haibo Zhao Xuehui Han Oil Exploration and Development Research Institute of Daqing Daqing China China University of Petroleum (East China) Qingdao China

Under the condition of simulated formation temperature and pressure, the compression and shear wave velocity of the tuffaceous conglomerates and rock-fragment sandstones of the reservoirs in K1t, k1n group of Cretaceous system in Tanan are measured. The effects of lithology, mineral content, density, porosity, shale content, and water saturation on the acoustic velocity of the athrogenic rock are studied. Within the limits of our observation, some rules are found: (1) the velocity of the fine tuffaceous conglomerates is remarkably greater than that of the tuffaceous rock-fragment sandstones with good physical property;(2) the compression velocity increases with fragment content, and decreases with quartz and feldspar content in the mud;(3) the compression velocity increases with density, especially, in tuffaceous rock-fragment sandstones, the velocity keeps a good relation with density in form of power function;(4) compression and shear wave velocity decreases with porosity and shale content, velocity of the tuffaceous rock-fragment sandstones keeps a good relation with porosity and shale content in form of negative linear function, but effects of shale content is only 1/5 to 1/10 of that of the porosity, hence can be neglected;(5) with porosity increases, compression wave velocity is relatively sensitive to fluid alternation, and the rang in which velocity varies keeps positive correlation with porosity. The result provides a foundation for the research of seismic and logging data evaluation approaches in athrogenic rock reservoirs, Haita basin.

关键词： Tuffaceous rock-fragment Sandstones Acoustic Velocity Porosity Shale Content Density Water Saturation

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