Method for processing formation data based on lithologic parameter of reservoir rock

Abstract

The invention provides a method for processing formation data based on the lithologic parameter of a reservoir rock, which belongs to the field of geophysical exploration and well logging evaluation and development of lithologic parameters of reservoir rocks and the formation data. The method comprises the following steps of: acquiring formation lithology and fluid information by using geological exploration and development equipment; analyzing the acquired formation lithology and fluid information by using analytical equipment to acquire a basic parameter required by the calculation of pore fluid volume of the reservoir rock; and establishing a petroleum volume and petroleum geological reserve calculation equation by selecting reservoir parameters such as corresponding porosity, oil saturation and the like. The method is suitable for evaluating reservoir rock petroleum resources with proved reserves, controlled reserves and predicted reserves, which belongs to the field of reserve calculation by a volume method. By a volume method reserve calculation equation established in the method, system errors caused by the original volume method reserve calculation formula are eliminated, so that the calculation accuracy of petroleum geological reserves is improved by 6 to 21 percent.

Description

technical field [0001] The invention relates to a method for geophysical exploration and logging evaluation and development, in particular to a method for processing formation data based on lithological parameters of reservoir rocks, and further obtains reservoirs through calculation of formation data processing based on lithological parameters of reservoir rocks Rock pore fluid volume. Background technique [0002] Oil is one of the pore fluids in reservoir rocks. There are many ways to calculate oil in place. The calculated in-place reserves include proven in-place reserves, controlled in-place reserves and predicted in-place reserves. Proved geological reserves refer to the geological reserves with great certainty estimated and obtained after the evaluation drilling proves that the reservoir can provide exploitation and obtain economic benefits in the stage of reservoir evaluation. In addition, objectively and accurately evaluating the scale of oil-in-place reserves has ...

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Problems solved by technology

, such as the volumetric reserve calculation formula used in Chinese patent application CN101937108A N=100A o hφS oi / B oi , it is required to calculate the theoretical static oil geological reserves, but the calculated oil geological reserves N is the actual oil geological reserves of the reservoir (100φ / φ t )% or (100S oi / S oe )%, there is a systematic error with the actual oil geological reserves

"Code for Calculation of Petroleum and Natural Gas Reserves" is the research result summed up by experts and scholars for many years, and it is also a geological reserve evaluation technology applicable to all stages of exploration and development. However, there are still some problems in the calculation formula of oil reserves in the code. Needs to be further perfected and improved, such as formation effective porosity φ and original oil saturation S oi The product of is not equal to the volume percentage of oil in the reservoir rock pores, multiplied by the oil-bearing area and the effective thickness of the oil layer, nor equal to the oil volume in the reservoir rock pores under the formation conditions, but smaller than the oil in the reservoir rock pores volume; due to many reasons such as application habits and periodicity in management, this incomplete volumetric petroleum geological reserve calculation formula has been continued to be used at present

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