Widespread complex lithologic oil and gas reservoir formation mode evaluation system and method

A technology for complex lithology and oil and gas reservoirs, applied in geophysical measurement, instruments, etc.

Inactive Publication Date: 2012-09-19
BEIJING NORMAL UNIVERSITY
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Problems solved by technology

Exploration techniques and methods for complex lithology reservoirs are fundamentally different from conventional structural reservoirs, and their distribution is not necessarily related to the current structural style. Conventional seismic data interpretation and processing are no longer the most effective means

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  • Widespread complex lithologic oil and gas reservoir formation mode evaluation system and method
  • Widespread complex lithologic oil and gas reservoir formation mode evaluation system and method
  • Widespread complex lithologic oil and gas reservoir formation mode evaluation system and method

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Embodiment Construction

[0006] The present invention relates to a system and method for evaluating the accumulation model of widely distributed complex lithologic oil and gas reservoirs, taking the West Lake Sag as an example, including five steps:

[0007] Step 1: Analysis of source kitchen conditions in complex lithology oil and gas reservoirs; coal-measure source rocks in the Pinghu Formation and Huagang Formation in the Xihu Sag are well developed, widely distributed, and thick, especially the coal seams and dark mudstone sources in the lower members of the Pinghu Formation and Huagang Formation The rocks are relatively developed, and the organic matter belongs to type III gas-generating humic kerogen, and the abundance of organic matter is relatively high. It is estimated that the total hydrocarbon generation amount can reach 2200×10 8 t, began to generate a large amount of hydrocarbons at about 44Ma, with an obvious trend, and is still generating and expelling hydrocarbons. The huge hydrocarbon...

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Abstract

The invention aims to provide a widespread complex lithologic oil and gas reservoir formation mode evaluation and research system and method. The specific complex lithologic oil and gas reservoir formation mode is analyzed, and the widespread complex lithologic oil and gas reservoir formation mode of near-source high-pressure hydrocarbon supplying, fault fissure dredging and lower gas and upper water reservoir forming is established, wherein the near-source high-pressure hydrocarbon supplying is the precondition of the formation and the existence of the oil and gas system of the lithologic oil and gas reservoir, the fault fissure dredging is the necessary impetus condition of the hydrocarbon transportation dredging and the formation of the lithologic oil and gas reservoir filling, and the lower gas and upper water reservoir forming is the typical characteristic of the formation of the widespread complex lithologic oil and gas reservoir. Under the background of continuous upwards-inclined reservoir, the bottom of the oil and gas reservoir is short of continuous flowing water because the reservoir is usually the oil and gas layer and the dry layer, the upwards-inclined reservoir can become into the normal oil and gas reservoir along the upwards-inclined direction of the structure, and an oil-gas-water coexistence belt is formed between the upwards-inclined reservoir and the normal oil and gas reservoir. Due to the widespread complex lithologic oil and gas reservoir forming mode evaluation and research system, the theoretical support is provided for the exploration of the lithologic oil and gas reservoir, and the wide exploration prospect of the lithologic oil and gas reservoir is showed.

Description

Technical field: [0001] The invention relates to a research method for oil and gas accumulation. Background technique: [0002] Traditional oil and gas geological theory holds that oil and gas accumulations are mostly distributed in traps at the structural highs of basins. Oil and gas exploration practice has proved that oil and gas reserves located in structural highs are very limited, and quite a few traps do not contain oil and gas. In the 1970s, many extra-large natural gas pools were discovered in the synclines and structural downdips of many basins in North America. The exploration techniques and methods of complex lithology reservoirs are fundamentally different from those of conventional structural reservoirs, and their distribution is not necessarily related to the current structural style. Conventional seismic data interpretation and processing are no longer the most effective means. According to the characteristics of complex lithologic reservoirs, it is hoped t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V9/00
Inventor 张金亮任伟伟徐发李存磊谢俊李德勇唐明明王春艳
Owner BEIJING NORMAL UNIVERSITY
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