Manufacturing method for muddy loosing sand stone core

Abstract

The invention relates to the field of petroleum exploitation and specifically relates to a manufacturing method for a muddy loosing sand stone core. The method comprises the following steps: firstly, acquiring mineral composition and proportion, grain size and stratum water component of a target reservoir section; selecting corresponding raw materials; confirming pressing pressure according to the overlying rock pressure of the stratum of the core; adopting epoxy resin cementation for manufacturing the core; acquiring porosity, permeability, Young modulus, uniaxial compressive strength and poisson ratio of the core of the target reservoir section; endowing a weighting coefficient; determining the porosity, permeability, Young modulus, uniaxial compressive strength and poisson ratio of an artificial core; acquiring the relative errors and total deviation by comparing with various parameters of the true core; if the deviation is larger, adjusting the pressing pressure and the cement content till the core parameters meet the simulation requirement.

Description

technical field [0001] The invention relates to the field of petroleum development, in particular to a method for making argillaceous loose sandstone cores. Background technique [0002] As the recoverable reserves and new proven reserves of conventional oil and gas resources decrease year by year, petroleum scientists have to shift their development targets to unconventional oil and gas resources, including muddy unconsolidated sandstone oil and gas reservoirs. Compared with conventional oil and gas reservoirs, argillaceous unconsolidated sandstone oil and gas reservoirs generally have the characteristics of shallow burial, looseness and looseness, poor compaction diagenesis, high clay mineral content, low permeability, weak bonding strength, and high crude oil viscosity. The injection-production process is difficult to meet the production demand, so shale unconsolidated sandstone oil and gas reservoirs often need to be fractured before development. By creating fractures in...

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Problems solved by technology

Compared with conventional oil and gas reservoirs, argillaceous unconsolidated sandstone oil and gas reservoirs generally have the characteristics of shallow burial, looseness and looseness, poor compaction diagenesis, high clay mineral content, low permeability, weak bonding strength, and high crude oil viscosity. The injection-production process is difficult to meet the production demand, so shale unconsolidated sandstone oil and gas reservoirs often need to be fractured before development. By creating fractures in the reservoir, the oil and gas seepage capacity of the reservoir can be improved, and the oil and gas recovery can be improved.

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