Method for determining favorable unit for continental shale oil exploration

Abstract

The invention discloses a method for determining a favorable unit for continental shale oil exploration, comprising the following steps of: step 1, establishing a mud shale foundation profile, and refining the lithofacies types; step 2, performing master control factor analysis on different shale strata and the lithofacies types, and determining favorable shale strata and lithofacies types; and steps 3, comparing and evaluating favorable strata and favorable lithofacies, and comparing and analyzing the favorable unit for the shale oil exploration comprehensively in a two-dimensional way. The analysis of the hydrocarbon generation conditions, the reservoir conditions, and the fracturing conditions is carried out for different lithofacies types in addition to considering the hydrocarbon generation conditions, the reservoir conditions, and the fracturing conditions of the shale development stage. The favorable unit for the shale oil exploration is determined through dual comparison of theshale strata and the lithofacies types. The method for determining the favorable unit for the continental shale oil exploration considers the operational steps systematically and comprehensively, hashigh operability and more reliable comparison result, and can provide a reliable basis for the evaluation of the continental shale oil selection area.

Description

technical field [0001] The invention belongs to the technical field of unconventional oil and gas resource exploration, and in particular relates to a method for determining favorable units for continental shale oil exploration. Background technique [0002] Unconventional oil and gas resources are becoming one of the important targets of oil and gas exploration in China, among which shale oil reservoirs are currently one of the options with practical significance. According to the traditional theory of petroleum geology, organic-rich dark shale is often source rock or sealing layer, rather than oil and gas reservoirs. With the deepening of oil and gas exploration and development, a large amount of oil and gas has been gradually discovered in mud shale formations, and shale oil and shale gas have become hotspots in global unconventional oil and gas exploration and development. The geological evaluation method of favorable units for shale oil exploration is shale oil The fou...

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Problems solved by technology

[0004] At present, the study of favorable units for shale oil exploration has not yet formed a comparable systematic analysis method. At home and abroad, only a single division and evaluation of shale intervals or shale oil types (matrix type, fracture type, and interlayer type) have been made and evaluated. Did not achieve the expected exploration effect

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