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method and development of oil deposits in carbonate reservoirs demonstrating high layer permeability stratification heterogeneity.
method and development of oil deposits in carbonate reservoirs demonstrating high layer permeability stratification heterogeneity.
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机译：碳酸盐岩储层中油层的沉积方法和开发，证明了层渗透率分层非均质性。
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摘要
The invention relates to the oil-producing industry and can be used for developing oil pools in carbonate reservoirs exhibiting a high heterogeneity of permeability stratification. The inventive method makes it possible to increase the oil extraction factor, to actively develop low- and mean-permeable strata of an oilfield and simultaneously increase in current performance of productive wells and in injection capacity of injection wells. The method involves preliminary dividing strata to be perforated into individual groups which are similar in terms or permeability and, while perforating said strata, leaving 1-2 meters of non-perforated space in an excolumn for reliably packing during the production processes (hydraulic fracturing, acid treatment). Each weakly permeable (low- and mean-permeable) group is exposed to hydraulic fracturing in the ordinary way with water by pumping a proppant or silica sand for reinforcing cracks and applying packer devices from the bottom and the top of the treated group of strata. Highly permeable strata are not exposed to hydraulic fracturing. Once the hydraulic fracturing of the weakly permeable strata groups has been carried out, an acid is pumped into the same weakly permeable strata groups in the ordinary way by using the packer devices, wherein the highly permeable strata groups are exposed (or not exposed, according to the filtering properties of the strata) to acid treatment after the others. When the associated gas reinjection process is used, the associated gas is reinjected at pressures which are less than usually used pressures. The formulas for calculating the additional effect of the well use in different conditions are also disclosed.
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