【英文PPT】巴肯页岩亲水性和疏水性孔隙网络的定量表征

石油KING

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页数：21
Quantifying Hydrophilic and Hydrophobic Pore Networks of the Bakken Shale*

Understanding rock wettability behavior from micrometer to nanometer scale is of great significance to in-situ hydrocarbon volume calculation and oil recovery improvement in tight-rock reservoirs. In this study, comprehensive rock-fluid experiments were performed to investigate wettability of three members of the Bakken Formation. The contact angle of selected specimens was measured by applying four types of hydrophilic and hydrophobic fluids (i.e., DI water, API brine, IPA isopropyl alcohol, and n-decane) to observe rock wettability at the millimeter scale. Then through a spontaneous imbibition test, different fluid flow behaviors in the shale were compared. As capillary-pressure greatly controls fluid migration in micro- and nano-pores, mercury injection capillary pressure (MICP) analysis, using non-wetting fluid mercury, was conducted to obtain pore system characteristics with multiple connected pore networks at the pore-throat size ranging in mm-nm scale. Furthermore, the wettability at nano-pore scale was qualified through a small-angle neutron scattering technique, by comparing the volume fraction of intruded fluids.
The results suggest a distinct difference in the rock wettability between the Upper/Lower Bakken and Middle Bakken, which is mainly caused by mineralogical composition and organic matter content. Multiple and complementary approaches enable us to quantify the proportion, and size distribution of hydrophilic vs. hydrophobic pore networks in the Bakken Shale.
【英文PPT】巴肯页岩亲水性和疏水性孔隙网络的定量表征.pdf (15.28 MB, 下载次数: 1, 售价: 10 阳光币)

2022-11-7 08:12 上传

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