In the scientific research of petroleum field, it is often necessary to use core for laboratory physical simulation experiment. Because the volume of natural core is too small to be representative, and natural core has no heterogeneity, it can not completely simulate the real situation of underground oil reservoir. As a result, the use of artificial cores and outcrop cores has become extremely common.

Artificial core

Artificial core physical simulation is one of the important means of scientific research in the process of oilfield development, especially in the study of tertiary oil recovery and improving oil recovery mechanism has an important guiding role. Through the artificial core physical simulation experiment to explore the development law, with natural core to verify the law is correct, with the mineral test to determine whether the large-scale promotion, artificial core will always take natural core as a reference, but in the heterogeneity is far more than the representative of natural core. The production of artificial core usually has three kinds of quartz filling, alumina phosphate sintering, epoxy resin pressing and cementing method.

Natural outcrop core

Compared with artificial core, natural outcrop core is closer to underground reservoir rock in terms of pore structure, which can truly reflect the influence of pore structure on the seepage process. After years of research, various geological profiles across the country have been investigated, from which dozens of outcrop cores with similar geological characteristics to the reservoir have been screened, and the scale of exploitation has been carried out, and its permeability range0.005-3000 md. The outcrop core can be used for drilling fluid damage evaluation, perforation quality evaluation, cementing evaluation, fracturing fluid evaluation, logging evaluation, oil-water seepage, reservoir production, enhanced oil recovery and other reservoir physical simulation studies.