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Chemical flooding allows for the improvement of oilfield performance after standard waterflooding processes. Chemical EOR methods modify different properties of fluids and/or rock to mobilize the remaining oil. It is expected that the residual oil will be different in properties than conventional. A new technology is presented to study a surfactant-polymer flooding, based on a periodic sampling and measuring properties of oil and water during 15 months. At each sampling date, 2D reservoir model was built to track ...

The hydrocarbon reservoirs in mature regions are extremely complex, each reservoir having its own identity. The value of recoverable geological reserves depends on the data of geological and geophysical studies: determination of heterogeneity and reservoir compartmentalization. Residual oil reserves are concentrated in undeveloped clayey, poorly permeable intervals along the section, the development of which is impossible without research and development. One of such studies is the methods of lineament analysis of...

The presented work highlights the general geochemical aspects and considers the theoretical basis of the method of geochemical monitoring of oil fields using the indicator of the quantitative ratio of organic compounds and their isomers - isobutane/butane. The object of the study are the microorganisms that can affect gas composition. The purpose of the work is to study the effect of microorganisms on the biodegradation of oil. The peculiarity of the oil composition will be used to search, delineate bypassed oil a...

The article describes the results of geochemical studies of formation water in the Romashkinskoe oil field of the Republic of Tatarstan. Geochemical monitoring is a good indicator of the origin of natural waters, the method can be used to mark formation waters. The study of an extensive collection of produced water made it possible to trace the change in its geochemical composition depending on the age of formation of the reservoir in the Volga-Ural region. Geochemical studies were carried out in the produced form...

We performed petromagnetic, elemental composition and mineralogical investigations of samples from lake Bolshoe Miassovo, Chelyabinsk region, Russia (55°9?59.89?N 60°20?51.82?E). Based on seismoacoustic investigation 5 long (up to 5.3 m) cores were collected by special hydraulical core extractor constructed in institute. For core sampling were choosen places with continuous sedimentation and absence of gas diffusion. Samples for laboratory investigations were selected layer by layer in intervals of 2 cm. The princ...

In August 2018 an expedition was organized to Lake Sevan (Armenia), where seismoacoustic studies and the selection of short cores of bottom sediments for laboratory investigations were carried out. Five seismoacoustic sections revealed a bedding pattern of bottom sediments. The thickness of sediments reaches ~ 14 m. Laboratory studies included: radiocarbon dating, measuring magnetic susceptibility, measuring coercive parameters, obtaining thermomagnetic diagrams, determining the elemental composition of sediments,...

We performed seismoacoustic and magnetic investigations of samples taken from Lake Bolshoe Miassovo (Chelyabinsk region, Russia) in 2018. Before sampling, seismoacoustic investigations were conducted in order to study stratification in sediments, reconstruct the reservoir?s history and select core locations with undisturbed stratification. A special hydraulic corer was used for taking long core samples. Five cores up to 5 meters long were obtained. For laboratory investigations, all cores have been cut into smalle...