A Method for Determining Favorable Units 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 present invention belongs to the technical field of unconventional oil and gas exploration, particularly relates to a method continental shale oil exploration unit advantageously determined. Background technique [0002] Unconventional oil and gas resources is becoming an important target Chinese oil and gas exploration, shale reservoir which is one of the options currently has practical significance. Petroleum Geology conventional theory that, the dark organic-rich shale or source rock is often capping layer, instead of hydrocarbon reservoirs. With the further exploration and development of oil and gas, gradually found a large number of oil and gas, shale oil and shale gas has become a hot global exploration and development of unconventional shale oil and gas in the mud system, evaluation methods favorable geological unit is shale oil shale oil exploration basic and key technology exploration. [0003] In recent years, shale oil exploration began as a ...

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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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