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A Geochemical Tracking Method for Secondary Oil and Gas Migration

A technology of oil and gas migration and migration, applied in the field of petroleum geological exploration, can solve the problems that hinder the development of secondary migration tracking and cannot solve the influence of organic phase

Active Publication Date: 2017-07-04
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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  • Description
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Problems solved by technology

[0006] However, in the case of blended feeds, the classification of crude oils based on the organic phase does not address the organic phase effect
Regarding the impact of maturity, no solution has been proposed so far, which has been hindering the development of secondary migration tracking

Method used

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  • A Geochemical Tracking Method for Secondary Oil and Gas Migration

Examples

Experimental program
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Effect test

Embodiment Construction

[0103] (1) One-dimensional oil and gas migration tracking in Xifeng Oilfield, Ordos Basin

[0104] Xifeng Oilfield is located in the Longdong area in the southwest of the Ordos Basin ( figure 1 ). Except for the edge of the basin, faults are not developed in most areas of the basin. The reservoirs of this oilfield are located in the continuous narrow and long sand bodies of the Chang 8 member of the Upper Triassic Yanchang Formation. The sand body was deposited at the front of a braided river delta. The main source rocks are located in the Chang 7 Member of the Yanchang Formation. The main source rocks reached the peak of hydrocarbon generation and expulsion in the late Early Cretaceous, and the hydrocarbon generation kitchens were located in the northeast direction of Xifeng Oilfield ( figure 1 ).

[0105] 19 crude oil samples were collected in Xifeng Oilfield ( figure 1), carried out quantitative tests on saturated hydrocarbons, aromatic hydrocarbons and nitrogen-contai...

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Abstract

A novel geochemical tracing method for petroleum secondary migration includes a method of eliminating biodegrading effect, a method of eliminating maturity effect and tracing petroleum migration, and a method of eliminating organic phase, maturity and biodegrading effects by multiple-factor analysis and tracing petroleum migration. The novel geochemical tracing method for petroleum secondary migration has the advantages that petroleum migration direction, path and distance can be explained, a beneficial target region for petroleum migration and accumulation is provided accordingly, and drilling verification shows that drilling success rate is high.

Description

technical field [0001] The invention belongs to the field of petroleum geological exploration, in particular to a method for oil and gas geochemistry. Background technique [0002] Organic matters in source rocks undergo thermal evolution to generate oil and gas. The generated oil and gas enter the carrier (reservoir, unconformity, fault) through the primary migration, and then migrate into the trap for the second time in the carrier to enrich and form the oil and gas reservoir. Therefore, the direction, path and distance of secondary migration are very important for oil and gas exploration. So far, people's understanding of secondary migration is far from meeting the needs of oil and gas exploration. It is worth noting that in basins with a high degree of exploration, to discover new oil and gas reservoirs, important information on the direction, path and distance of secondary migration of oil and gas is required. For this reason, people have explored the geochemical tra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V9/00
Inventor 张刘平
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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