Compact oil reservoir exploitation method

Abstract

The invention provides a compact oil reservoir exploitation method. The compact oil reservoir exploitation method comprises the steps that a packer is lowered to the preset distance position on the top boundary of an oil layer of an oil reservoir; injection liquid is injected into the oil reservoir stratum through preset injection pressure to carry out fracture forming operation until formed fractures meet preset fracture forming parameters; a well is shut in for a preset time duration after fracture forming is finished; and after well shut-in is finished, production is carried out through thepreset pressure drop. The problem that the expected yield increasing effect can hardly be achieved by fracturing a single main fracture is solved, the requirements for oil reservoir homogeneous transformation, oil reservoir transformation size increase, oil reservoir contact area increase and reservoir stratum use size increase are met, and the oil well recovery rate is increased.

Description

technical field [0001] The invention relates to petroleum exploration technology, in particular to a compact oil reservoir exploitation method. Background technique [0002] With the gradual development of low-permeability reservoir exploration and development technology, tight oil reservoir resources have become a reliable substitute for unconventional oil and gas resources. However, tight reservoirs have poor physical properties and high start-up pressure gradients, making it difficult to form natural production capacity. New technical means are needed to achieve economical and effective production. [0003] Under the conditions of low porosity, low permeability, and low pressure, due to the poor fluid supply capacity of reservoir matrix fractures, it is difficult for conventional fracturing techniques to achieve the expected stimulation effect only by fracturing a single main fracture. Therefore, it is necessary to study new Reservoir stimulation technology to improve th...

AI Technical Summary

Problems solved by technology

However, tight oil reservoirs have poor physical properties and high start-up pressure gradients, so it is difficult to form natural production capacity, and new technical means are needed to achieve economical and effective production

[0003] Under the conditions of low porosity, low permeability, and low pressure, due to the poor fluid supply capacity of reservoir matrix fractures, it is difficult for conventional fracturing techniques to achieve the expected stimulation effect only by fracturing a single main fracture. Therefore, it is necessary to study new Reservoir stimulation technology to increase single well production in tight oil reservoirs

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