We present an analytical approach for pressure transient test analysis in naturally fractured vuggy reservoirs. This analysis approach relies on a triple-continuum concept, using observed geological data from carbonate oil formations in western China, to describe transient flow behavior in fracture-vugmatrix reservoirs. In the conceptual mathematical model, fractured vuggy rock is considered as...

Mechanical and chemical processes experienced by carbonate rocks result in a complex network of natural fractures dissolution features that have direct implications on porosity, permeability, connectivity reservoirs. Characterization is best done core; however, it can be time-consuming due to the large amounts individual present long list attributes typically collected for each feature. Additio...

The Chigbrak Formation in the Upper Ediacaran is one of important exploration targets Tarim Basin, NW China. However, no significant discoveries have been made this field, and unclear reservoir genesis factors restricting breakthrough. This study examined outcrops Aksu area northwestern Basin by using systematic descriptions petrologic features Formation. Samples were selected for tests stable ...

Abstract. Authigenic epidote supergroups are an abundant accessory mineral in the calcium–aluminum silicate and thermometamorphic hydrothermal zones of Campi Flegrei (Phlegraean Fields) geothermal field located west Naples, Italy. Geothermal exploration for high-enthalpy fluid produced drill core cuttings to ∼ 3 km depth Mofete (MF1, MF2, MF5) San Vito (SV1, SV3) wells, where measured down-hole...

The study of the carbonate cements in the Permian-Triassic Dalan-Kangan formations resulted in the identification of five stages of calcite and dolomite cementation, which completely or partially occluded pores. Cement types appear to be early isopachous calcite (i; C1-non-luminescence), equant (ii; C2-dull CL), fairly coarse secondary dolomite rhombs (iii; C3-zoning red CL), coarse sparry calc...

We present a novel coupled fluid-poroelastic model and an associated numerical upscaling procedure to calculate seismic attenuation velocity dispersion in porous rocks induced by fluid pressure diffusion (FPD) the presence of mesoscopic fluid-saturated voids, such as, for example, vugs or factures. By applying appropriate interface conditions, proposed couples Navier-Stokes equations viscous fl...

Lower Ordovician sandstones of the “Grès Armoricain” formation in Montlouis quarry near Janzé (Ille-et-Vilaine, France) display rare Fe-sulfide veins filled with a low-T (<300°C) assemblage pyrite, marcasite, “melnikovite”, trace amounts galena and sphalerite. Pyrite occur as contorted cm-scale columnar pyrite invading larger idiomorphic crystals coating vugs. It is usually overgrown by fibrora...

Abstract Water Alternating Gas (WAG) is a cyclical process that involves alternating water and gas injections with the primary goal to improve sweep efficiency by maintaining initial high pressure, slowing breakthrough, lowering oil viscosity. The objective of this work apply optimize WAG strategy on carbonate field light oil, compare it initially planned water-flooding strategy, investigate ca...

A multicontinuum conceptual model is presented and implemented into a three-dimensional, three-phase reservoir simulator, using a generalized multicontinuum modeling approach. The conceptual model, proposed for investigating multiphase flow and displacement through naturally fractured vuggy carbonate reservoirs, is based on observation and analysis of geological data, as well as on core example...