Method and device for predicting favorable distribution and growth range of conventional tight sandstone gas reservoir
A technology for tight sandstone gas reservoirs, distribution and development range, applied in measurement devices, analytical materials, permeability/surface area analysis, etc., can solve the problem of difficulty in predicting the favorable distribution and development range of tight sandstone gas reservoirs
Active Publication Date: 2014-11-05
CHINA UNIV OF PETROLEUM (BEIJING)
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[0006] In order to solve the problems in the prior art, the present invention proposes a method and device for predicting the favorable distribution and development range of conventional tight sandstone gas reservoirs, which solves the problem of difficulty in predicting the favorable distribution and development range of tight sandstone gas reservoirs
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[0056] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0057] Conventional tight gas reservoirs refer to natural gas reservoirs with buoyancy as the main driving force for migration and accumulation, which are formed by densification of diagenesis such as compaction in the late stage of the reservoir, that is, tight sandstone gas reservoirs that form first and then become tight. It is formed above the filling threshold of the reservoir (Φ>12%) and densifies with increasing depth (Φ<12%). Through analysis, the dist...
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Abstract
The invention relates to a method and device for predicting the favorable distribution and growth range of a conventional tight sandstone gas reservoir. The method includes: determining the main controlling factors of the conventional tight sandstone gas reservoir in a research area, wherein the main controlling factors include a hydrocarbon kitchen, a palaeohigh, a favorable sedimentary facies belt and a regional caprock, with the hydrocarbon kitchen, the palaeohigh, the favorable sedimentary facies belt and the regional caprock appearing sequentially from the bottom up at a reservoir forming position; determining the reservoir controlling scopes of the main controlling factors; drawing a target stratum porosity planar graph; and taking the region with a porosity of less than 12% as the force balance boundary to perform restriction, superimposing the reservoir controlling scopes of the main controlling factors of the conventional tight sandstone gas reservoir on the target stratum porosity planar graph, thus obtaining the overlapping region as the most favorable growth range of the conventional tight sandstone gas reservoir. The technical scheme provided by the invention can acquire the favorable distribution and growth range of the conventional tight sandstone gas reservoir more objectively and accurately, and is of great guiding significance to exploration of conventional tight sandstone gas.
Description
technical field [0001] The invention relates to the technical field of predicting the favorable distribution and development range of oil and gas reservoirs, in particular to a method and device for predicting the favorable distribution and development range of conventional tight sandstone gas reservoirs. Background technique [0002] Since the discovery of tight sandstone gas reservoirs, the dynamic mechanism of their formation has not been explained clearly. Because the formation dynamics of gas reservoirs are many and the formation process is complex, it is difficult to explain with a single accumulation dynamic process, and it is difficult to generalize the formation of gas reservoirs. the main controlling factor. [0003] Reference 1: Jiang Zhenxue, Lin Shiguo, Pang Xiongqi, etc., Comparison of Two Types of Tight Sandstone Gas Reservoirs [J]. Petroleum Experimental Geology, 2006, 28(3): 210-219, the technical scheme of this document is based on the accumulation period a...
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IPC IPC(8): G01N33/00G01N15/08
Inventor 庞雄奇汪文洋霍志鹏庞宏肖爽
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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