Establishment method for hydrocarbon source rock hydrocarbon production rate charts in petroleum resource assessment

Abstract

The invention relates to an establishment method for hydrocarbon source rock hydrocarbon production rate charts in petroleum resource assessment. The establishment method includes the steps of 1), collecting experimental samples and determining thermal simulation experiment data through experiments; 2), collecting materials; 3), calibrating kerogen generated oil, generated gas and oil-cracking gas kinetic parameters; 4), establishing sedimentary burial history and thermal-history models of hydrocarbon source rocks on a target stratum of a research area; 5), establishing constraint condition of hydrocarbon source rock hydrocarbon production rate; 6), establishing kerogen generated oil, kerogen generated gas, oil generated gas, clean and total gas conversion profile charts on the target stratum of the research area; 7), checking whether dynamics geological extrapolation results meet requirements or not; 8), putting forwards part of hydrocarbon expulsion mode adjustment coefficients, evaluating hydrocarbon production rate curves of the partial hydrocarbon expulsion model, and establishing the hydrocarbon source rock hydrocarbon production rate charts including three modes, namely the mode of complete hydrocarbon expulsion, the mode of partial hydrocarbon expulsion and the mode of no hydrocarbon expulsion. The shortcoming in an original calculating method and experiment simulated data of the hydrocarbon source rock hydrocarbon production rate is overcome, and the hydrocarbon source rock hydrocarbon production rate at the target stratum can be accurately and reasonably determined according to oil field exploration practice by oil field workers.

Description

technical field [0001] The invention relates to a method for evaluating oil and gas resources, in particular to a method for establishing a hydrocarbon yield chart of source rocks in the evaluation of oil and gas resources. Background technique [0002] The hydrocarbon production rate of source rocks is one of the key parameters for the evaluation of oil and gas resources in zones / blocks and basin-level resources. A lot of research has been done on the evaluation methods of source rocks’ hydrocarbon production rates. In the past, source rocks The evaluation methods of hydrocarbon production rate mainly include oil and gas generation simulation experiment method and element conservation method (or material balance method). The former ignores the influence of different geological models (such as burial rate and geothermal gradient) on the hydrocarbon production rate, and the evolution of vitrinite in laboratory thermal simulation is inconsistent with that in geological conditi...

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Problems solved by technology

Among them, the advantage of the airtight experimental system is that the hydrocarbon production rate of source rocks evaluated by samples is closer to the actual hydrocarbon production rate of source rocks in geological conditions. 6 ~C 14 components

The open experimental system refers to the use of the Rock-Eval (source rock evaluation instrument) pyrolysis instrument and its improved instruments to economically, quickly and accurately evaluate the hydrocarbon production rate of the source rock of the sample. The disadvantage of dynamic parameters of oil and gas generation is that it is related to the actual underground geological conditions (open system, semi-closed semi-open system and closed system are determined according to the actual structural background, that is, the tensile stress field is generally an open system, and the extrusion stress field is generally an open system. field is generally a closed system, and the transitional stress field is generally a semi-closed and semi-open system) does not match

Most of the semi-closed and semi-open experimental systems use a single temperature point or a constant temperature for thermal simulation of the source rock hydrocarbon production rate of the sample, which is not suitable for continuous pyrolysis or hydrocarbon generation kinetics research

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