In the practice of any exploration or oil producing enterprise, the parameters of a productive or potentially promising geological target are estimated using a method of temporary tracking and recording of a change in level/pressure based on the classical principle of sequential change of stationary states. Its main drawback against the background of wide practical application is the incorrect determination of the reliable value of the productivity coefficient (Kprod) for complex reservoir rocks, especially those with strong texture heterogeneity, which in reality is not enough to draw up high-quality and most importantly real design technological documents for the integrated development of oil and gas fields. Hence the large degree of conventionality of the results obtained during office processing, as well as various opinions among specialists on the problems of interpretation of hydrodynamic studies of wells. The special literature on oilfield geology and hydrodynamic studies contains numerous attempts by different researchers from various sides to overcome this (significant in the opinion of the authors of the article) drawback of using the above method, but so far there have been no noticeable positive "shifts" in this direction. Everything rests on the bulkiness and complexity of the proposed analytical solutions. Based on many years of research, the authors of the article give their vision of solving this problem. The proposed modified grapho-analytical method of calculation in low-flow non-permeation wells that penetrated reservoir rocks with oils with Newtonian properties makes it possible to estimate the reliable value of the productivity factor of the reservoirs (Kprod) in the conditions of the formation pressure deficit that exists everywhere in the fields of the West Siberian oil and gas basin (with stationary flat-radial filtration).
A quantitative measure of well productivity is the productivity factor. Its value is determined by many factors, but especially by filtration-volume parameters of the zone immediately adjacent to the bottomhole.Filtration-capacitive properties of these zones are formed mainly at the stage of penetration and development of productive object. The practice shows that the present set of technological measures, which characterize the completion cycle, largely determines the reduction of filtration characteristics of the reservoir in the near-wellbore area.Often the consequences are so severe that even from highly permeable intervals it is not possible to obtain commercially viable flows of formation fluid.Under conditions of annually growing volumes of drilling and oil and gas production, old technological methods and schemes are no longer satisfying production. Today there is an urgent need to find and develop new, highly effective methods of drilling, production, field development, allowing meeting the needs of the domestic economy in hydrocarbons.The process of well completion plays an important role in this process. Promising in this area should be considered such a set of measures, which allows preventing or eliminating the negative impact of the cycle of well construction on the productive capacity of the reservoir to the greatest extent.In this regard, the right choice of technical or technological solutions is largely conditioned by the availability of information about the degree of their influence on the change in reservoir properties.
The paper describes the method of isolation of bottom water inflow in oil wells. The method of isolation of inflow of formation water in the well, watered by water cone flowing into the near-wellbore area, is drilling is carried out from the main borehole of the stopped well into the productive formation with water intrusion into radial offshoots along the radiusbelow of the well perforation interval. They pump the waterproofing composition into referred radial offshoots with the creation of the waterproofing screen along the radius of the main wellbore. They leave the well for a period of reaction of composition injected under pressure and perform a subsequent well completion through existing perforations of the perforated interval.
The article describes features of magnetotelluric scanning of the Earth's crust while searching and exploring hydrocarbon deposits. The text gives valuable information on possibilities of magnetotelluric method in the study of the Earth's crust.
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