Актуальность. На современном этапе перед нефтедобывающей отраслью стоят серьезные задачи по поиску новых эффективных технологий по повышению нефтеотдачи пластов. В процессе разработки нижнемеловой залежи нефти наблюдается тенденция значительного снижения дебита скважин за счет отложений в насосно-компрессорных трубах труднорастворимых асфальтеносмолистых веществ. С падением дебита, давления и температуры интенсивность отложений, в том числе кольматирующих элементов в призабойной зоне пласта, увеличивалась. В статье решается задача подбора эффективного способа обработки призабойной зоны с целью повышения интенсификации добычи и увеличения нефтеодачи пласта за счет более полной ее очистки от трудноудаляемых кольматирующих отложений. Основной целью исследования является определение наиболее эффективного способа обработки терригенных коллекторов нижнемеловых залежей для воздействия на скелет горной породы, образующей коллектор, и защиты от кольматирующих отложений. Объект: Горячеисточненское месторождение, расположенное на восточном окончании Терского хребта Грозненского района Чеченской республики. Месторождение многопластовое. В разработке и эксплуатации пребывали миоценовая, верхнемеловая, альбская, альб-аптская и барремская залежи. Наиболее крупные объекты связаны с верхнемеловыми и альб-аптскими отложениями нижнего мела. Миоценовая залежь практически выработана. Альбская и барремская залежи недоразведаны и эксплуатируются единичными скважинами. Продуктивные отложения альб-аптской залежи характеризуются сравнительно низкими коллекторскими свойствами. Методы: исследование различных технологических методов воздействия на призабойную зону пласта скважины. Результаты. С целью интенсификации добычи и увеличения нефтеодачи пласта предлагается производить обработку терригенных коллекторов нижнего мела органическими растворителями РИНГО-ГКС, РИНГО-СКС и МКС. Экспериментальные обработки в скважинах показали эффективность воздействия на призабойную зону и полную её очистку от кольматирующих отложений.
The main optimal directions of research work related to the control and regulation of the development process in relation to the Khankalskoye field, while ensuring fire and environmental safety, are identified. The study of reservoir and filtration properties of the reservoir layers is usually carried out by hydrodynamic studies of wells, by methods of steady-state sampling and unsteady processes for restoring bottom-hole pressure in wells. Graphical dependencies are obtained that allow us to study and analyze changes in individual indicators during the development of the deposit and their mutual relations, thanks to which, it is possible to correctly assess the state of development and find the right ways to regulate the processes in terms of ecology and fire hazard. The article presents research on the wells of the Khankalskoye field. The analysis of the control of indicators revealed a number of reasons that influenced the failure to meet the project indicators for oil production.
The oil industry is faced with the task of determining the most effective technological schemes, while ensuring environmental and fire safety, which can increase the return of oil-producing reservoirs. During the development of the Lower Cretaceous oil deposits of the Goryacheistochnenskoye field, located at the eastern end of the Tersk Ridge, there is a tendency to decrease the flow rate of oil production wells due to deposits of hardly soluble asphaltene-tar-parfin substances in the elevator pipes. The drop in the well flow rate led to an increase in the temperature, pressure in the reservoir, as well as the intensity of deposits of colmating elements in the bottom-hole formation zone. The authors of the article propose to solve the problem of selecting an effective method of processing the near-well zone to increase oil recovery and by cleaning from colmating deposits. The main goal of the study is to identify the most effective way to treat the terrigenous near-well zone of the Lower Cretaceous formation in order to influence the skeletal structure of the reservoir rocks and combat colmating deposits. Various methods of impact on the bottom-hole zone of the well were studied. It is proposed to treat the terrigenous formation zones of the Lower Cretaceous deposits with organic RINGO-GKS and MKS solvents. Experimental fire-safe treatment of wells has shown an effective effect on the bottom-hole formation zone and its complete cleaning of colmatate deposits.
This article deals with the issues of enhanced oil recovery in terrigenous reservoirs characterized by structural heterogeneity in both the section and along the strike. As a working oil displacing agent, high-pressure gas is used, which is more effective than water-based solutions. The mechanism of the formation of the transition zone in the area of gas mixing with oil is shown and the empirical dependence of the sizes of the transition zone on the length of the linear displacement section and the viscosity ratio of oil and gas in reservoir conditions is established. Information is given on testing a high-pressure gas injection method in the conditions of the Goit-Kort field (CR). It is shown that the introduction of the method allowed to increase the current oil production and oil recovery coefficient in the field.
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