Method and system for constructing logging parameters reflecting reservoir productivity

A construction method and logging technology, which are applied in the field of petroleum geophysical exploration and can solve uninvolved problems

Active Publication Date: 2019-10-11
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0011] None of the above literatures involves the method of constructing logging parameters that reflect reservoir productivity based on well logging data. Therefore, it is necessary to deve

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  • Method and system for constructing logging parameters reflecting reservoir productivity
  • Method and system for constructing logging parameters reflecting reservoir productivity
  • Method and system for constructing logging parameters reflecting reservoir productivity

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Embodiment Construction

[0046] After a large number of comparisons of reservoir productivity (based on testing and production data) and logging curve characteristics (based on logging data), it is found that the relative characteristics of natural gamma ray and spontaneous potential curves are significantly related to reservoir productivity: at a specific Under the scale rule, most of the reservoir sections with good overlap between spontaneous potential curve and natural gamma ray curve have good productivity; while the reservoir sections with poor spontaneous potential curve and natural gamma ray curve overlap mostly have poor productivity; Reservoir sections that do not overlap with natural gamma ray curves generally do not produce oil and gas.

[0047]Based on the analysis of geological factors, it is concluded that in the sandstone section with relatively pure lithology, the change trends of natural gamma ray and spontaneous potential logging responses are relatively consistent, so under a specif...

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Abstract

A method and system for constructing logging parameters reflecting reservoir productivity are disclosed and the method comprises the following steps of 1) setting left and right scales of a natural gamma curve and a natural potential curve on a log curve for a target reservoir segment; 2) calculating an overlap difference ci of each depth point i in the target reservoir segment; and 3) accumulating the porosity ap of the target reservoir segment when ci is less than c0. The invention, aiming at the difficulty of logging evaluation productivity, designs a method for constructing parameters capable of reflecting reservoir productivity by using the natural gamma, natural potential and logging interpretation porosity data, and is simple in process, easy to operate and good in practical application effect.

Description

technical field [0001] The invention relates to the technical field of petroleum geophysical exploration, and more specifically, to a method and system for constructing logging parameters reflecting reservoir productivity. Background technique [0002] Oil and gas reservoir productivity evaluation and prediction is an important part of oilfield development plan. Traditionally, reservoir productivity prediction is mainly based on oil testing, production test data and reservoir numerical simulation, etc. There is no mature method for productivity evaluation based on well logging data, because productivity is a comprehensive indicator of the dynamic characteristics of oil and gas reservoirs , is closely related to many dynamic and static factors such as fluid seepage performance, reservoir pore structure, and production pressure difference. However, the reservoir parameters obtained by the logging reservoir evaluation method mainly reflect the static characteristics of the res...

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Application Information

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IPC IPC(8): G01V11/00E21B49/00
CPCE21B49/00G01V11/00
Inventor 张军王磊李军刘志远南泽宇李浩付维署胡瑶
Owner CHINA PETROLEUM & CHEM CORP
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