A Simulation Method for the Formation Process of Biogenic Heavy Oil

Abstract

The invention belongs to the technical field of petroleum exploration and development and particularly relates to a simulation method for the forming process of biogenic origin thick oil. The simulation method specifically comprises the following steps that crude oil for simulation is selected, wherein the selected crude oil and thick oil of a test oil reservoir have same source rock, and the selected crude oil does not biodegrade or biodegrades slightly; microfloras for degrading the crude oil are enriched, and thus the microfloras capable of degrading the crude oil to produce methane gas areobtained; a simulated oil reservoir environment is constructed; and the test result is analyzed. The simulation method has the characteristics of simple technique and high simulation similarity degree; the degrading process which is completed by tens of millions of years in the actual oil reservoir is completed in a short time, and the blank of the research method of the crude oil microbial thickening process is filled in; and data obtained by the simulation method have the important guiding effect on thick oil forming mechanism and thick oil and associated gas exploration and development.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploration and development, and in particular relates to a simulation method for the formation process of biogenic heavy oil. Background technique [0002] The world's heavy oil resources are very rich, the global resources are about 400-600 billion tons, mainly distributed in Canada, the United States, South America, Africa, Australia, Russia and China and other countries. Shallow gas usually refers to natural gas with a buried depth of less than 1500m, which is rich in resources. The recoverable reserves of shallow gas in the world are about 39 trillion cubic meters, accounting for about 23% of the recoverable natural gas reserves. At present, the United States, Russia, China, Canada, Japan and other countries have discovered shallow gas reservoirs with industrial value. Due to the rich shallow gas resources, shallow buried depth, low exploration and development costs, less investment and les...

AI Technical Summary

Problems solved by technology

However, there are few studies on the relationship between heavy oil and shallow gas, especially the research on the formation relationship and quantitative characterization of heavy oil reservoirs and shallow gas reservoirs is still blank.