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Lithologic trap depicting method

A technology for lithologic traps and slope break zones, which is applied in the field of oil and gas exploration and can solve the problems of insufficient reliability of lithologic traps, difficulty in identifying boundaries between thin sand bodies and lithologic bodies, and complex depositional backgrounds.

Active Publication Date: 2020-08-07
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology

However, for offshore medium-deep lithological traps with a depth of more than 3,000 meters, due to special seismic and geological conditions such as deep burial of the target layer, complex sedimentary background, and poor seismic data quality, it is difficult to describe it. Due to the difficulties in identifying the boundaries of thin sand bodies and lithologic bodies, the lack of reliability of lithologic traps, and the difficulty in quickly and accurately describing large-scale lithologic exploration, it is difficult to use the above-mentioned lithologic trap prediction technology to predict middle-deep lithologic traps. describe more accurately

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Embodiment Construction

[0052] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only the parts related to the present invention are shown in the drawings but not all of them.

[0053] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the conve...

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Abstract

The invention discloses a lithologic trap depicting method, and belongs to the technical field of oil and gas exploration, and the lithologic trap depicting method comprises the following steps: S1, selecting data capable of meeting lithologic trap depicting requirements; S2, identifying a dominant sedimentary facies belt; S3, recognizing the type of the slope folding belt and the distribution range of the slope folding belt, and determining favorable sand body distribution based on the slope folding belt; S4, carrying out quantitative depiction on the favorable sand body distribution to complete depiction of the lithologic trap. According to the method, the lithologic trap of the offshore middle-deep layer can be quantitatively depicted, and a technical basis is provided for lithologic exploration.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration, in particular to a method for describing lithological traps. Background technique [0002] With the continuous improvement of the exploration level of major oil and gas basins in my country, the exploration of lithologic oil and gas reservoirs has gradually become one of the main subjects of oil and gas exploration discovery and increase of reserves and production. [0003] Lithological trap prediction technology is currently the most common oil and gas exploration method. Lithologic trap prediction techniques mainly include seismic facies analysis technique, seismic attribute technique, and reservoir inversion technique. [0004] However, in the existing technology, seismic facies analysis technology, seismic attribute technology, reservoir inversion technology and other technical means can achieve better exploration results in the identification and characterization of shallow ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/50
CPCG01V1/50G01V2210/6169G01V2210/62
Inventor 高顺莉赵军任艳李宁周祥林侯国伟刘建斌李帅
Owner CHINA NAT OFFSHORE OIL CORP
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