Hydrocarbon accumulation threshold determining method and device

A technology of oil and gas accumulation and bottom limit, applied in the field of oil and gas exploration, can solve problems such as troublesome implementation, cumbersome calculation steps, large error of accumulation bottom limit, etc., and achieve the effect of improving accuracy and simplifying complexity

Active Publication Date: 2015-03-25
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

Because the calculation steps involved in the above method are too cumbersome, and the calculation process needs to be transformed through various models, resulting in a relatively large error in the final predicted accumulation limit, and it is more troublesome to implement

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  • Hydrocarbon accumulation threshold determining method and device
  • Hydrocarbon accumulation threshold determining method and device
  • Hydrocarbon accumulation threshold determining method and device

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Embodiment Construction

[0045] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0046] The inventors used a large number of core analysis porosity data, pore fluid data and oil test production data to establish a geological model of oil and gas content evolution with pore space and hydrocarbon charging state evolution, and compared the oil and gas content of the reservoir with the porosity Evolution, reservoir oil and gas content and water saturation respectively establish mathematical statistical relationship, so as to establish a calculation method for the bottom limit of oil and gas accumulation in sedimentary basins.

[0047] Specifically, a well with rich core analysi...

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Abstract

The invention provides a hydrocarbon accumulation threshold determining method and device. The method includes: selecting a research area from a to-be-researched sedimentary rock basin; acquiring the core analysis data and formation test and production test data of the research area; building the evolutionary relationship between the oil-gas possibility and the porosity of a research area inner reservoir according to the core analysis data and formation test and production test data; determining the critical porosity when the research area inner reservoir is a complete dry layer, and using the determined critical porosity as the hydrocarbon accumulation threshold of the to-be-researched sedimentary rock basin. The method has the advantages that the technical problem that the hydrocarbon accumulation threshold cannot be accurately and effectively determined is solved, the complexity of the hydrocarbon accumulation threshold determining method is reduced, and accuracy of hydrocarbon accumulation threshold determining is increased.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration, in particular to a method and device for determining the bottom limit of oil and gas accumulation. Background technique [0002] With the increasing degree of exploration of conventional oil and gas resources in the middle and shallow layers of sedimentary basins, the focus of research on oil and gas resources at home and abroad has gradually shifted from shallow layers to deep layers, and from conventional oil and gas reservoirs to unconventional oil and gas resources. As an unconventional oil and gas resource, tight sandstone gas has accounted for 70% of the world's unconventional resources. The potential of tight sandstone gas resources has attracted people's attention. [0003] However, the existence of tight sandstone gas (i.e., tight oil and gas) requires certain physical conditions. For example, when the burial depth exceeds the minimum limit of accumulation or the porosity...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00
CPCE21B49/00
Inventor 庞雄奇武鲁亚陈筱
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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