Method and device for determining hydrocarbon expulsion efficiency of hydrocarbon source rock

Abstract

The invention provides a method and a device for determining a hydrocarbon expulsion efficiency of a hydrocarbon source rock. The method comprises the steps of identifying and determining longitudinalhydrocarbon expulsion intervals of strong heterogeneous terrestrial hydrocarbon source rock stratum series according to core measured data and well logging data; according to the correlation betweenparameters, deriving a quadratic equation with one unknown on the hydrocarbon expulsion efficiency and determining the specific parameters required to solve the equation; according to the parameters such as the organic carbon content (TOC) of the hydrocarbon source rock, calculating numerical values of the specific parameters required by the equation; calculating the hydrocarbon expulsion efficiency KP of the hydrocarbon source rock according to the established quadratic equation with one unknown. According to the method, the simulation for complex hydrocarbon generation and expulsion processes is avoided; the method has the advantages of simple and intuitive principles, easy obtaining of calculation parameters, and intuitive and accurate calculation results; the hydrocarbon expulsion efficiency of the hydrocarbon source rock can be quantitatively evaluated; the petroliferous basin resource quantity and the reliability of exploration potential evaluation are improved, and wide applicability is provided.

Description

technical field [0001] The invention belongs to the technical field of petroleum geological exploration, and relates to a method and a device for determining the hydrocarbon expulsion efficiency of source rocks. Background technique [0002] Hydrocarbon source rock is the primary target of exploration in oil-gas-bearing basins. It is not only the material basis for oil-gas accumulation and accumulation, but also one of the main controlling factors for the formation of oil-gas reservoirs. The hydrocarbon generation and expulsion potential of source rocks determines the resource potential of oil-gas-bearing basins. and exploration value. At present, domestic and foreign evaluation methods for oil and gas resource potential mainly include genetic method, analogy method, statistical method, Delphi method, etc., among which genetic method is currently the most widely used method. The basic idea of ​​using the genetic method to evaluate oil and gas resources is to predict the pot...

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Problems solved by technology

[0004] In view of the difficulty in calculating the hydrocarbon expulsion efficiency of strongly heterogeneous source rock formations in continental oil and gas-bearing basins, the purpose of the present invention is to provide a method for determining the hydrocarbon expulsion efficiency of source rocks. The purpose of the present invention is also to provide a A device for determining the hydrocarbon expulsion efficiency of source rocks; using the method and device avoids the simulation of complex hydrocarbon generation and expulsion processes, has the advantages of simple and intuitive principles, easy access to calculation parameters, intuitive and accurate calculation results, and can quantitatively evaluate source rock expulsion hydrocarbon efficiency

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