METHOD FOR DEVELOPMENT OF A DOMANIC OIL RESERVOIR Russian patent published in 2020 - IPC E21B43/26 E21C39/00 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil industry and can be used in development of low-permeability Domanic oil carbonate reservoirs using injection of acid and hydraulic fracturing of formation (HFF). Proposed method comprises drilling of wells with extraction of core in productive stratum, laboratory analysis of core, acid treatment and proppant hydraulic fracturing – HFF in said wells using packers, extraction of products from wells. According to the drilled wells data the geomechanical parameters of the rock and the stress vector in the formation are determined, a hydrogeomechanical model of the formation is constructed, in all wells in each of oil-saturated interlayers of formation there performed separately is acid treatment, using two-packer layout, wherein volumes of pumped acid composition into each of interlayers are set inversely proportional to their permeability, product is withdrawn from wells as average daily flow rate of each well drops to value of 20–60 % of the maximum daily production rate of oil produced after acid treatment. In these wells there performed is mini-HFF, changes in stress vectors in formation are determined, hydrogeomechanical model is adapted to obtained data collected after drilling and operation – extraction of oil and water, pressure and change of stresses in formation, proppant HFF is carried out using hydraulic fracturing fluid with viscosity of up to 80 cP, scenario of further development of formation by all wells with achievement of maximum oil yield is calculated, operations are repeated after occurrence of data on mini-HFF on all wells, thus on each of iterations, specifying hydrogeomechanical model of formation.

EFFECT: technical result is higher oil recovery of formation.

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