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Oil and gas source identifying method suitable for heterogeneous salt-lake basin

An identification method and heterogeneous technology, applied in the field of oil and gas exploration and development, which can solve the problems of inaccurate quantification and poor certainty.

Active Publication Date: 2015-06-10
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of poor certainty and inaccurate quantification in judging the source of oil and gas in heterogeneous salt lake basins in the above prior art, and to provide a method for identifying oil and gas sources suitable for heterogeneous salt lake basins

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  • Oil and gas source identifying method suitable for heterogeneous salt-lake basin
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Embodiment Construction

[0040] The embodiment of the present invention will be described in further detail below in combination with an example of the Dongpu depression in the Bohai Bay of China and the accompanying drawings. The Dongpu Sag is a strongly heterogeneous saline lake basin, which can be divided into a single uplift and single sag structural belt and a single uplift and multiple sag structural belt according to the structural plan, section and uplift pattern of the basin. Such as figure 2 As shown, the orange and green in the figure are customary usages in this technical field, where the orange area is the uplift area, and the green area is the depression area. The following are combined with the accompanying drawings figure 2 The oil and gas sources of the single uplift and single sag structural belt and the single uplift and multi-sag structural belt are identified, and the identification method is described as follows:

[0041] One, by figure 1It can be seen that the identificatio...

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Abstract

The invention relates to an oil and gas source identifying method suitable for a heterogeneous salt-lake basin and belongs to the technical field of oil gas exploration and development. The method is characterized in that oil population and source rock population of the heterogeneous salt-lake basin are divided by acquiring basic geological data. According to the division results of oil population and source rock population of the heterogeneous salt-lake basin, the oil and gas source of the heterogeneous salt-lake basin is judged. The principle of the similar sedimentary environment and maturity of crude oil and oil source rock is fully applied to the method, and population division is executed to the crude oil and the oil source rock through clustering analysis, thereby creating the corresponding relationship between the crude oil and the oil source rock. According to the corresponding relationship, the single-uplift and single-depression oil gas in the heterogeneous salt-lake basin can be effectively identified. A mathematical model established by gamma cerane / C31 homohopane (22S) parameters is applied to the single-uplift and multi-depression tectonic zone of the heterogeneous salt-lake basin, so that the source proportion of oil and gas in different depression zones can be clearly distinguished, and exploration of depression oil and gas can be effectively guided.

Description

technical field [0001] The invention relates to a method for identifying oil and gas sources suitable for heterogeneous salt lake basins, belonging to the technical field of oil and gas exploration and development. Background technique [0002] With the deepening of oil and gas exploration, oil and gas exploration in structural uplift belts is becoming more and more difficult, and the potential resource potential is getting smaller and smaller, while the adjacent slope areas and depression areas have become the key areas of oil and gas exploration in the 21st century . Usually, in heterogeneous salt lake basins, there are many sub-sags, how to determine the main source direction of oil and gas in the uplift zone is particularly important for the selection of sub-sag oil and gas exploration areas. Uplift belts are usually adjacent to multiple sags, does the oil and gas in the uplift belt come from a single sag or from multiple sags? If it comes from multiple sags, the propo...

Claims

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Application Information

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IPC IPC(8): G01V9/00
Inventor 徐田武慕小水彭君兰亚萍倪军锋苏颂成万涛李迎胜刘淑
Owner CHINA PETROLEUM & CHEM CORP
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