CN-120315026-B - Petroleum exploration method, petroleum exploration system and terminal

CN120315026BCN 120315026 BCN120315026 BCN 120315026BCN-120315026-B

Abstract

The application provides a petroleum exploration method, a petroleum exploration system and a petroleum exploration terminal, and aims to improve the efficiency and success rate of petroleum resource exploration. The method comprises the steps of screening a target exploration area in the surrounding area of the existing oil field, and measuring underground medium speed structure data through a seismic exploration method. By comparing the rock sample of the existing oil field with the underground medium speed structure data, the potential oil and gas resource area is accurately positioned. Drilling locations are determined from the obtained subsurface medium information data and the zone is assessed for oil potential by rock sample analysis. Compared with the traditional exploration method, the method can obviously reduce exploration risk and cost, improve the accuracy of oil and gas resource discovery, and provide a more scientific and economic technical path for petroleum and gas exploration.

Inventors

LI XUE

Assignees

新方舟能源科技(天津)有限公司

Dates

Publication Date: 20260512
Application Date: 20250317

Claims (4)

1. A method of petroleum exploration comprising the steps of: A1, exploring and determining a target exploration area possibly containing oil and gas resources in a peripheral area of a preset existing oil field area; a2, measuring and obtaining corresponding underground medium speed structure data of the exploration area in the target exploration area through a preset seismic exploration method; A3, determining exploration area underground medium information data corresponding to the exploration area underground medium speed structure data according to comparison of the existing oilfield rock sample of the existing oilfield area and the existing oilfield underground medium speed structure data; a4, selecting a drilling position according to the underground medium information data of the exploration area and performing drilling to acquire a rock sample of the exploration area; a5, determining corresponding exploration area rock sample characteristic data according to exploration area rock sample analysis; a6, analyzing and evaluating the underground oil content of the target exploration area according to the underground medium information data of the exploration area and the rock sample characteristic data of the exploration area; further comprising the steps of: A101, acquiring the surface topography data of the existing oil field in the existing oil field area; a102, extracting and generating corresponding existing oilfield surface topography data according to the existing oilfield surface topography data by a preset topography feature extraction algorithm; A103, selecting a plurality of corresponding target selection areas from the peripheral area of the existing oilfield area according to a preset exploration selection range; a104, acquiring surface topography data of a selected area of the target selected area; a105, respectively extracting and generating corresponding topographic feature data of the selected areas according to the topographic data of the earth surface of each selected area by using a topographic feature extraction algorithm; A106, calculating the corresponding topographic feature similarity according to the topographic feature data of each selected area and the topographic feature data of the existing oil field by a preset topographic feature comparison algorithm; a107, defining a target selection area corresponding to the topographic feature data of the selection area with the highest topographic feature similarity as a target exploration area; The topographic feature extraction algorithm comprises the following steps: B1, determining a corresponding positioning coordinate matrix in preset topographic data to be processed according to a preset interval distance; b2, determining a corresponding coordinate height in the to-be-processed topographic data according to each positioning coordinate in the positioning coordinate matrix; B3, combining the positioning coordinate matrix and the coordinate height to generate a corresponding terrain height matrix; B4, defining a terrain height matrix as terrain feature data; the topographic feature comparison algorithm comprises the following steps: C1, generating a corresponding topographic gray map of the selected area according to topographic feature data of the selected area by a preset image generation algorithm; c2, generating a gray scale map corresponding to the existing oilfield topography by an image generation algorithm according to the existing oilfield topography characteristic data; C3, calculating the similarity of the corresponding topographic image according to the topographic gray map of the selected area and the topographic gray map of the existing oil field by using a preset image similarity algorithm; C4, defining the similarity of the topographic images as the similarity of the topographic features; further comprising the steps of: a401, generating corresponding exploration area underground medium three-dimensional model data according to exploration area underground medium information data; a402, simulating drilling holes at all positions of the three-dimensional model data of the underground medium in the exploration area according to preset drilling depth and preset drilling diameter to obtain corresponding simulated rock sample medium data; A403, acquiring simulated rock sample medium structure speed data corresponding to each simulated rock sample medium data from the underground medium speed structure data of the exploration area; A404, determining a corresponding hydrocarbon source rock structure speed range according to the existing oilfield rock sample and the existing oilfield underground medium speed structure data; a405, calculating the estimated proportion of the hydrocarbon source rock in the medium data of each simulated rock sample according to the structural speed range of the hydrocarbon source rock; a406, defining simulated rock sample medium data with the maximum hydrocarbon source rock pre-estimated proportion as the optimal simulated rock sample; A407, defining the positioning coordinates corresponding to the best simulated rock sample as drilling positions; further comprising the steps of: D1, acquiring corresponding drilling rock sample speed structure data according to the underground medium speed structure data of the drilling position of the rock sample in the exploration area; D2, determining corresponding depth range data of the source rock and TOC content depth data according to rock sample analysis of the exploration area; D3, determining corresponding hydrocarbon source rock speed structure data according to the hydrocarbon source rock depth range data and the drilling rock sample speed structure data; d4, generating corresponding seismic wave velocity TOC content comparison data according to TOC content depth data and hydrocarbon source rock velocity structure data; and D5, generating underground oil potential distribution data of the exploration area according to the seismic wave velocity TOC content comparison data and the exploration area underground medium velocity structure data.
2. The oil exploration method of claim 1, further comprising the step of: e1, generating a corresponding three-dimensional model of the underground oil potential distribution of the exploration area according to the underground oil potential distribution data of the exploration area; E2, accumulating TOC content values of the underground of each positioning coordinate according to a three-dimensional model of underground crude oil potential distribution of a preset statistical depth in the exploration area to generate positioning underground TOC content data; E3, mapping and positioning the underground TOC content data to the surface topography data of the selected area of the target exploration area according to the positioning coordinates so as to generate underground oil potential surface mapping data; And E4, generating a corresponding subsurface oil potential surface map according to the subsurface oil potential surface map data.
3. A petroleum exploration system for implementing the petroleum exploration method of any of claims 1-2, comprising: A topographic mapping module; A seismic exploration module; A rock sampling module; A rock analysis module; a data processing module; the terrain mapping module, the seismic exploration module, the rock sampling module and the rock analysis module are respectively connected with the data processing module in a data mode; Wherein the oil exploration system further comprises an oil exploration strategy comprising the steps of: F1, surveying and determining a target exploration area possibly containing oil and gas resources in a peripheral area of a preset existing oil field area through the topographic mapping module; F2, obtaining corresponding underground medium speed structure data of the exploration area through the seismic exploration module in the target exploration area; F3, determining the underground medium information data of the exploration area corresponding to the underground medium speed structure data of the exploration area according to the comparison of the existing oilfield rock sample of the existing oilfield area and the underground medium speed structure data of the existing oilfield through the data processing module; f4, selecting a drilling position according to the underground medium information data of the exploration area and performing drilling acquisition on rock samples of the exploration area through the rock sampling module; F5, determining corresponding exploration area rock sample characteristic data according to exploration area rock sample analysis through the rock analysis module; And F6, analyzing and evaluating the underground oil content of the target exploration area according to the underground medium information data of the exploration area and the rock sample characteristic data of the exploration area.
4. An intelligent terminal comprising a memory and a processor, the memory having stored thereon a computer program capable of being loaded by the processor and performing the method according to any of claims 1 to 2.

Description

Petroleum exploration method, petroleum exploration system and terminal Technical Field The application relates to the field of petroleum exploration, in particular to a petroleum exploration method, a petroleum exploration system and a petroleum exploration terminal. Background Petroleum exploration is a complex geological engineering process that detects and determines the distribution, quantity, and quality of subsurface petroleum resources. Traditional petroleum exploration mainly comprises methods such as seismic exploration, gravity exploration, magnetic exploration, electrical exploration, drilling and the like. Each method has unique technical features and limitations. Among them, seismic exploration is widely regarded as the most accurate petroleum exploration method. By artificially generating seismic waves and collecting and analyzing the seismic waves, engineering personnel can relatively accurately map the subsurface geologic structure. But the seismic data it obtains requires a fine analysis. Even experienced specialists may make false positives in interpreting these complex seismic waveforms and subsurface structures. While drilling is the most straightforward but costly method of oil exploration. By actual borehole sampling, engineering personnel can directly obtain detailed information of the subsurface formations and potential petroleum resources. But the drilling cost is extremely high, there is a great economic risk, and certain damage to the environment may be caused. Each exploratory well may represent millions of dollars in investment, while relatively low power. Disclosure of Invention The application provides a petroleum exploration method, which comprises the following steps: A1, exploring and determining a target exploration area possibly containing oil and gas resources in a peripheral area of a preset existing oil field area; a2, measuring and obtaining corresponding underground medium speed structure data of the exploration area in the target exploration area through a preset seismic exploration method; A3, determining exploration area underground medium information data corresponding to the exploration area underground medium speed structure data according to comparison of the existing oilfield rock sample of the existing oilfield area and the existing oilfield underground medium speed structure data; a4, selecting a drilling position according to the underground medium information data of the exploration area and performing drilling to acquire a rock sample of the exploration area; a5, determining corresponding exploration area rock sample characteristic data according to exploration area rock sample analysis; and A6, analyzing and evaluating the underground oil content of the target exploration area according to the underground medium information data of the exploration area and the rock sample characteristic data of the exploration area. By adopting the technical scheme, the petroleum exploration method can be used for screening target areas in the peripheral areas of the existing oil fields, then the seismic exploration method is used for acquiring underground medium speed structure data, potential oil and gas resources are positioned through comparison analysis with the known oil field data, and through selective drilling and rock sample analysis, the risk of blind exploration is reduced, the exploration cost is reduced, and the success rate of oil and gas resource discovery is improved. Optionally, the petroleum exploration method further comprises the steps of: A101, acquiring the surface topography data of the existing oil field in the existing oil field area; a102, extracting and generating corresponding existing oilfield surface topography data according to the existing oilfield surface topography data by a preset topography feature extraction algorithm; A103, selecting a plurality of corresponding target selection areas from the peripheral area of the existing oilfield area according to a preset exploration selection range; a104, acquiring surface topography data of a selected area of the target selected area; a105, respectively extracting and generating corresponding topographic feature data of the selected areas according to the topographic data of the earth surface of each selected area by using a topographic feature extraction algorithm; A106, calculating the corresponding topographic feature similarity according to the topographic feature data of each selected area and the topographic feature data of the existing oil field by a preset topographic feature comparison algorithm; a107, defining a target selection area corresponding to the topographic feature data of the selection area with the highest topographic feature similarity as a target exploration area. By adopting the technical scheme, the petroleum exploration method can quantitatively evaluate the similarity degree of the topographic features of different areas and the existing oil production area by acq