Pores, fractures, caves, and other storage spaces are commonly distributed in fractured-vuggy carbonate reservoirs. During the drilling process, more than half of all drill-in fluid loss issues caused by developed caves. Cave scales range from centimeters to meters, making leak prevention increasingly difficult through use traditional technologies. Currently, there is still high demand for unde...

Fracture modeling is one of the most important steps in the study of fractured reservoirs. Due to the high cost of imaging logs and their absence in most wells of the study area, it is often attempted to use other available data to detect fractures. This paper attempts to investigate the relationship between the lithology and fractures of rocks. For this purpose, the Image, Neutron, Density, Li...

carbonate successions of the sarvak formation (late albian? to mid-turonian) together with the carbonate of the ilam formation formed the second important hydrocarbon reservoirs in sw iran and persian gulf. facies analyses were carried out on the upper parts of the sarvak formation in western part of the ahwaz oilfield (az-63 well) to interpret depositional environment. lithologically, the uppe...

Abstract Carbonate reservoir has complex pore structures. At present, the influence of structure on water flooding mechanism carbonate reservoirs is insufficient. In this article, a systematic workflow was designed in combination with scanning electron microscope, particle size, physical properties, and experiments to study effect fine-grained rocks. Due small size strong heterogeneity, acid fr...

With the still huge dependence on crude oil, it is crucial to develop enhanced oil recovery techniques improve reservoir production and lifespan. Carbonate reservoirs constitute over half world's reserves, but they are challenging in terms of due their complex pore network, oil-wet or mixed-wet rocks, harsh conditions temperature salinity. This work offers a significant contribution exploitatio...

the experimental study and modeling of gravity drainage during water alternative gas injection, wag process, in carbonate rock for one of the iranian off-shore reservoir at lab-scale were carried out. the mechanism of gravity drainage during the wag process, and its contribution to the oil recovery in the fractured carbonate reservoirs were also studied. in the wag process alternatively gas is ...

Carbonate reservoirs rock typing plays a pivotal role in the construction of reservoir static models and volumetric calculations. The procedure for rock type determination starts with the determination of depositional and diagenetic rock types through petrographic studies of the thin sections prepared from core plugs and cuttings. In the second step of rock typing study, electrofacies are deter...

We present a ,,13C record from the Anti-Atlas mountains of Morocco and place it in the context of a detailed regional tectonostratigraphy. We place the lithoand chemostratigraphic record in a temporal framework using precision U-Pb zircon geochronology of ashes interbedded with the same carbonate units that provide "l3C data. The variations in "l3C of carbonate occur on a wide range of time sca...

Foraminifera are the most important source of information for oceanographic and climatic reconstruction on glacial–interglacial as well as on much longer time-scales. The information is contained in the chemical composition, especially the Ž 11 13 18 . isotopic ratios, of the calcitic shells e.g., d B, d C, d O . Based on the assumption that our understanding of the major parameters controlling...