Unconventional reservoirs refer to hydrocarbon reservoirs that require special stimulation treatments, such as hydraulic fracturing, to economically produce hydrocarbon. These reservoirs are tight with very low permeability, less than 0.1 milli Darcy (0.1 mD). Shale oil and shale gas reservoirs are prime examples of unconventional reservoirs. Effects of temperature on unconventional reservoirs’ dynamic elastic properties and permeability are usually overlooked during laboratory measurements and reservoir simulations leading to erroneous results and unsuccessful stimulation operations.

To investigate effects of temperature and confining pressure on dynamic elastic properties and permeability of unconventional core samples, two series of experiment were conducted on outcrop core samples from three prominent unconventional basins (Barnett, Wolfcamp, and Eagle Ford) in the United States. In the first set of experiments, eleven unsaturated outcrop core samples (four Barnett, four Eagle Ford, and three Wolfcamp) were used to assess effects of temperature and confining pressure on their dynamic elastic properties. In the second set of the experiments, seven core samples (two Barnett, two Eagle Ford, and three Wolfcamp) were used to study effect of temperature on their permeability at a constant confining pressure. Also, X-ray diffraction (XRD) analysis was conducted on core samples to determine the mineral compositions them. The results were then used to study effect of mineralogy on the rock samples’ dynamic elastic properties and permeability.

The results of this experimental study show that increase in temperature makes the core samples more ductile and less permeable. The results also demonstrate that the degree of the effect of the temperature on the dynamic elastic properties of the samples is directly related to the presence and volume of the clay minerals.

非常规油藏是指需要特殊增产措施（例如水力压裂）才能经济地生产碳氢化合物的碳氢化合物油藏。这些储层是致密的，渗透率非常低，小于0.1毫达西（0.1 mD）。页岩油和页岩气储层是非常规储层的主要实例。在实验室测量和储层模拟过程中，温度对非常规储层动态弹性和渗透率的影响通常会被忽略，从而导致错误的结果和增产作业失败。

为了研究温度和围压对非常规岩心样品的动态弹性和渗透性的影响，对来自美国三个著名非常规盆地（巴内特，沃尔夫坎普和伊格尔福特）的露头岩心样品进行了两个系列的实验。在第一组实验中，使用了11个不饱和露头岩心样本（四个Barnett，四个Eagle Ford和三个Wolfcamp）来评估温度和围压对其动态弹性特性的影响。在第二组实验中，使用七个岩心样品（两个巴尼特，两个伊格福特和三个沃尔夫坎普）研究了在恒定围压下温度对其渗透率的影响。另外，对岩心样品进行了X射线衍射（XRD）分析，以确定它们的矿物成分。

该实验研究的结果表明，温度升高使岩心样品更具延展性和渗透性。结果还表明温度对样品动态弹性性质的影响程度与粘土矿物的存在和体积直接相关。