A method for establishing a source rock hydrocarbon production rate chart in the evaluation of oil and gas resources

Abstract

The invention relates to a method for establishing a source rock hydrocarbon production rate chart in oil and gas resource evaluation, which comprises the following steps: 1) collecting experimental samples and determining their thermal simulation experimental data through experiments; 2) collecting data; 3) calibrating cheese 4) Establish the sedimentary burial history and thermal history model of the source rock in the target horizon of the study area; 5) Establish the constraints on the hydrocarbon production rate of the source rock; 6) Establish the target of the study area Sectional diagrams of kerogen oil generation, kerogen gas generation, oil-to-gas, net oil and total gas conversion rate of horizon source rocks; 7) Check whether the dynamic geological extrapolation results meet the requirements; 8) Propose adjustment coefficients for some hydrocarbon expulsion models , evaluate the hydrocarbon production rate curve under the partial hydrocarbon expulsion model, and establish a hydrocarbon production rate chart of the source rock under three hydrocarbon expulsion modes including complete hydrocarbon expulsion, partial hydrocarbon expulsion and no hydrocarbon expulsion. The invention overcomes the deficiencies in the previous method for obtaining the hydrocarbon production rate of the source rock and the experimental simulation data, so that the oilfield workers can more accurately and reasonably determine the hydrocarbon production rate of the target layer according to the oilfield exploration practice.

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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